فهرست مطالب mohabat nadaf

Awareness of changes process, as well as the proper management of land use in natural ecosystems, is of great importance in conservation natural resources. In this regard, the use of remote sensing has become a common approach due to the provision an extent spatial and temporal information. In this research, in order to land use mapping, first, the accuracy of three common methods of pixel-based (maximum likelihood), machine learning (support vector machine) and object-oriented methods were compared. Then, the spatial and temporal changes of land use in a period of 26 years (1997-2023) assessed using six Landsat satellite imagery. The accuracy of image classification methods was evaluated using Kappa coefficient and overall accuracy indices and the change trend was evaluated using crosstab and spatial evaluation methods. Based on the results, the support vector machine method had the highest kappa coefficient (0.71 to 0.98) and overall accuracy (86 to 99%) for all studied courses. According to the results, poor rangeland had a decreasing trend, and the land uses of very poor rangeland, bare soil, and rainfed agriculture had increasing trends. The area of poor rangeland decreased from 962 hectares (44.36%) in 1997 to 489 hectares (22.57%) in 2023, while very poor rangeland increased from 1138 hectares (52.48%) to 1606 hectares (74.05 percent) in the same period. The results of this research indicated that the trend of land use changes in Jayransoo rangeland is towards the destruction of rangelands and with the passage of time this trend is intensifying. Also, based on the results obtained from this research, it is suggested to use machine learning based classification method to prepare land use mapping in future research.

In this research, the volatile compounds of Oleo gum resin of   Ferula gummosa were extracted from the protected area of Saluk located in North Khorasan province of Iran by water distillation method and the chemical compounds were identified by GC-MS and reported for the first time. In the studied plant essential oil, 42 compounds that made up 95.78% of essential oils have been identified, the main components of which are β-pinene (44.51%), α-pinene (11.49%), para-cymene (2.48%), 3-carene (5.74%), and 2-isopropyl 4-methylanisole (4.58%). In the following, five identified main compounds of this plant were compared with the main compounds of 26 ecotypes that were previously reported. By comparing the five main compounds of these 27 ecotypes, it was found that the main compounds of these samples are classified in the category of monoterpenes, sesquiterpenes, and esters, and also by drawing a cluster dendrogram using R software, the proximity and distance of these samples in terms of the type of main compounds, it is clustered into three clusters including samples with similar compounds. This study can be effective in continuing the research on eco-phytochemistry and ethnobotanical characteristics of Frula gummosa.

In the present study, the flora of Tange-Khoshk Forest Reserve of Semirom in Isfahan with two zones, the core zone (under protection) and the buffer zone, was investigated to introduce the floristic composition, life forms, and geographical distribution, and understand the effects of exclosure on the vegetation structure. In this region, a total of 194 species belonging to 45 genera of plants were identified, of which Asteraceae, Fabaceae, and Poaceae were the most abundant in terms of the number of species. In terms of life forms, hemicryptophytes were dominant in both core and buffer zones. The study of the geographical distribution of the species showed that in both core and buffer zones, most species belonged to the Irano-Turanian vegetation area. This research showed that the exclosure of the Tange-Khoshk forest reserve had increased the diversity of vegetation, especially the presence of various tree species in the core zone.

The study of alkaloids from methanolic extract of Crucianella sintenisii from Rubiaceae family has not been studied yet. In this research, the methanolic extract was initially prepared from the aerial parts of Crucianella sintenisii, and then the resulting extract was acidified by acetic acid to remove neutral compounds. The neutral compounds were extracted by EtOAc (ethyl acetate). The resulting extract was alkalized with NH3 (25%), and then extracted with chloroform solvent. Finally, the crude alkaloid is extracted and ready to be injected into the MPLC device. One fraction was isolated, and the structure of 2-methyl-3-phenyl indole from the category of indole alkaloids was confirmed by using the spectroscopic techniques (NMR, ESI-MS, and IR). The therapeutic activities of the plant indole alkaloids are extensive, and most of these activities are related to the indole core in these structures.

The Booz Daghi region with an area of 62,000 hectares is located 47 kilometers from Maneh and Semelghan city. The floristic composition, biological, and chorological spectra of this area were investigated through several random collections in different habitats and vegetation types, as well as from 220 plots established in selected plant communities during the growing season of 2021. In this regard, 252 vascular plant species belonging to 173 genera and 53 families were recorded as native plants in the Booz Daghi region. The richest families were Asteraceae (31), Poaceae (25), Lamiaceae (22), and Fabaceae (21). The genera Astragalus L. (10), Allium L., Convolvulus L., and Stachys L. (each with 5 species) were the richest ones. Hemicryptophytes (31.3%) and therophytes (29.8%) were the dominant life forms of the region. A considerable number of species (63.5%) belonged to the Irano-Turanian region. The results of this study showed that the Booz Daghi region had a relatively rich flora that requires special attention and proper planning to protect its biodiversity.

The aim of this study is to determine the chemical composition of essential oils of Chaerophyllum ‎khorassanicum belonging to the Apiaceae family for the first time. Identification of essential oils ‎is necessary, for food, cosmetics- health industry, and medicinal uses. The plant was collected at ‎the flowering stage of Khorassan Razavi Province in Iran, Farizi Village. The shoot parts of the ‎specimen were dried in the laboratory and crushed to particles. The essential oils were obtained ‎by hydro-distillation using Clevenger and analyzed by GC-MS. Fifty-one components were ‎identified in Chaerophyllum khorassanicum essential oils which accounted for 97.2% of the ‎essence. The major chemical category of the volatile compounds were the monoterpene ‎hydrocarbons (65.5%), followed by oxygenated monoterpenes (24.5%). In particular, the main ‎components were limonene 32.1%, methyl eugenol 16.2%, and β-Ocimene 15.6%. In conclusion, ‎monoterpene hydrocarbons are characteristic and represent excellent chemotaxonomical markers ‎for Chaerophyllum khorassanicum.

The development of agricultural and urban areas and overexploitation of natural resources have caused significant changes in the hydrological regime of watersheds. Furthermore, population increase, unprincipled exploitations and climate changes have intensified this process. It is therefore necessary to know and study it continuously. The trend of hydrological series may also change due to climate change, land use and watershed management. Therefore, identifying the presence or absence of changes in time in rainfall and discharges of an area and presenting it in statistical analysis seems necessary. The Mann-Kendall test is one of the most widely used nonparametric methods for analyzing the flow of such data. Studying periods of rainfall and discharge as well as land use change can be useful in expressing the role of climatic and human factors. Therefore, the present study was conducted to investigate the trend of land use change and the role of each in the discharge trend of Kiar watershed. 

The present study was conducted in Kiar watershed located in Chaharmahal and Bakhtiari province as one of the northern sub-basins of Karun River. In order to conduct the current research and achieve the desired goals, after obtaining the information and data required for the research from the Chaharmahal and Bakhtiari Regional Water Organization, a joint statistical course of study stations was determined. Finally, the mentioned period was selected from 1363-1390. Then, Mann-Kendall non-parametric test was used to investigate the trend of changes in precipitation and discharge of stations in Kiar watershed. Then, land use changes in the study area in three time periods were extracted using the object-oriented classification method in IDRISI Taiga 16.03 software environment using Landsat's TM sensor images. Using the parameters of overall accuracy and kappa coefficient, the accuracy of the classification was calculated. Finally, the trend of land use change and its relationship with the trend of discharge were evaluated.

The results of trend analysis for the Dey River time series (on seasonal and annual scales) at the Burnt Mountain Station show that discharge has had a decreasing trend on both scales. The highest discharge trend in the seasonal series belongs to summer and the lowest discharge trend belongs to fall at the significant level of 1%. The study of trends in the rainfall time series of the region shows a different behavior. While the trend in Borujen station was upward, Shahrekord and Beheshtabad exhibited a downward trend, and no trend was found in Farsan station. The decreasing trend of discharge and precipitation in Kuh-e-Sokhteh hydrometric station and rain gauge stations in Shahrekord and Beheshtabad are on the same side, which can be attributed to the decrease in discharge due to the rainfall behavior of the region. The results of the trend of land use change showed that residential and agricultural lands have an increasing trend and rangeland and barren lands have a decreasing trend. Increasing the level of agriculture and residential areas can be a reason for reducing the trend in discharge.

Based on the results of the present study, the results of trend analysis for the time series of the river at the burnt mountain station showed that the discharge trend in seasonal and annual scales is Downward. The highest discharge trend in the seasonal series belongs to the summer season and the lowest discharge trend belongs to the autumn season. Also, the results of studying the trend in the time series of rainfall in the region showed different behaviors. While, the trend in Borujen station was upward, Shahrekord and Beheshtabad exhibited a downward trend, and no trend was found in Farsan station.

The aim of this study was to investigate the interaction of salinity and chromium stress on some morphological and physiological characteristics of portulaca oleracea. In a completely randomized design with 3 replications and 4 salinity levels (0, 4, 8 and 12 dS/m) using sodium chloride every 4 days through irrigation and 5 levels of chromium (0, 7, 14, 21 and 28 mg/ml). Kg (dry weight of soil) experiment was performed and before sowing seeds in soil with increasing potassium dichromate to soil, different levels of chromium treatment were prepared. The values of ion leakage, fresh and dry weight and leaf area, chlorophyll a, b and total, chlorophyll stability coefficient, carotenoids, photosystem II efficiency and relative water content of leaves were measured after 60 days of planting. The results showed that with increasing different levels of chromium and salinity, a significant decreasing trend (P≤0.05) was observed in fresh and dry weight, leaf area, chlorophyll a, b and total, carotenoids, photosystem II efficiency. The lowest efficiency of photosystem II and the highest rate of ion leakage were observed at salinity levels of 12 dS/m and chromium 28 mg/kg. The interaction of salinity and chromium had a significant decreasing effect on chlorophyll content, fresh and dry weight and leaf area. Was alone. However, salinity and chromium reduced the growth of portulaca oleracea leaves.

Livestock grazing management is one of the main manifestations of integrated watershed management. Lack of awareness of the effects of livestock grazing on biodiversity makes sustainable watershed management impossible. Therefore, awareness of the variation in plant diversity and composition under natural disturbances such as livestock grazing is important for optimal ecosystem management. This study aims to investigate the effects of different grazing intensity (low, moderate, and high) on spatial diversity components (α-diversity, β-diversity and γ-diversity), turnover and nestedness components of β-diversity and species composition in semi-steppe Broujen rangelands in Chaharmahal and Bakhtiari Province. Vegetation sampling was conducted based on a random-systematic sampling design using 60 plots of 2*2m in three grazing intensities including low, moderate and high. Statistical analysis was performed in R software using “vegan” and “betapart” packages. The results showed that an increase in grazing intensity could significantly (P-value < 0.01) decrease α-, β- and γ-diversity indices, which, in low grazing intensity, were 11.77, 7.22, and 19, respectively, while in high grazing intensity they were 3.44, 3.55, and 7, respectively. In addition, an increase in grazing intensity could significantly (P-value < 0.05) increase the turnover component of β-diversity due to species replacement, while there was no significant effect for nestedness components of β-diversity. The NMDS analysis results showed that different animal grazing could drive a significant deviation in plant community composition. The results of this study suggest that the light grazing intensity could be used as a suitable management tool in order to maintain and improve plant biodiversity.

Flora identification of every region playes essential role in conserving of genetic resources of the each country. Recognition of flora in each region is important and useful for other scientific researches. The aim of this study was investigated floristic composition, introducing the medicinal plant, determination of life forms, and plant geographical distrubition of Babaaman. This area is located in Bojnord, North Khorasan. The amount of annual precipitation is 252.7 mm. Plant species were collected in according to the beginning of growth season. Then these species were identified by using of Indispensible Floras. Atotal of 117 plant species belonging to 101 genera and 33 families are recorded in Babaaman, that shows plant diversity in this area. The richest plant families are Asteraceae (20 species), Poaceae (17 species), and Lamiaceae (14 species). The genera Centaurea L, Cousinia Cass.and Conolvulus L. each genus with 3 species are the richest ones. According to Raunkiar’s life form categories, they are including hemicryptophytes (38%), therophytes (32%), chamaephytes (16%), cryptophytes (8%) and phanerophytes (6%). From the view point of chorotype of this area include: Irano- Tourannian zone (65%), two regional (18%), three regional (9%) and several regional (8%). The most percent belongs to Irano- Tourannian zone. 28 plant species.

The aim of this study was to investigate interaction of sodium chloride with chromium on vegetative, and physiological traits, uptake, and accumulation of sodium and chromium in roots and shoots of portulaca oleracea. In a completely randomized design with 3 replications, 4 salinity levels (0, 4, 8, 12 dsm-1) using sodium chloride every 4 days through irrigation water and five levels of chromium (0, 7, 14, 21, 28 mgkg-1 of dry soil weight) were applied in a pot experiment. Different levels of chromium treatment were prepared before sowing the seeds by adding potassium dichromate to the soil. The amounts of root chromium and shoots were measured by the atomic absorption spectrometry. Sodium contents of roots and shoots, root and stem length, root diameter and surface, greenness index, transfer factor, and bioaccumulation were measured after 60 days of cultivation. Results showed that an increase in different salinity level was associated with a significant increase in sodium and chromium content of roots, shoots and bioaccumulation factor. The highest amount of chromium, sodium, and bioaccumulation factor were observed at salinity levels of 12 dsm-1 and 28 mgkg-1. The interaction between salinity and chromium was significant. With an increase in the salinity level, the amount of plant root transfer factor showed an increasing trend and with increasing chromium, the transfer factor decreased. Root length, diameter, and surface as well as stem length and greenery index showed a significant decrease in plants treated with chromium and salinity. The combined effect of high levels of chromium and salinity led to a further reduction in the concentration and accumulation of minerals compared to each stress alone. Although salinity and chromium reduced the growth of portulaca oleracea, it seems that accumulation of significant amounts of sodium and chromium in the roots, prevents their excessive transfer to the shoots and further reduction in plant growth.

Astragalus L. (Fabaceae) is the largest genus of vascular plants in the world, that comprises an estimated number of 2900 annual and perennial species. The members of this genus have a broad spectrum of usages (e.g. medicine, food, fodder, fuel, ornamental plants, etc.). Here, we present a review of ethnobotanical applications of different species of Astragalus by various ethnic and cultural groupings worldwide, to provide an exhaustive database for future works.

Literature survey was performed using Scopus, Google Scholar, PubMed, Medline, and Science Direct, and English and non-English reference books dealing with useful properties of the Astragalus species from 1937 to 2018. Consequently, we reviewed a total of 76 publications that supported lucrative information about various uses of this huge genus.

Several ethnobotanical uses of 90 Astragalus taxa were documented which were mainly originated from Asian and European countries. The two most frequently mentioned Astragalus treatments, were against urinary and respiratory diseases. The most commonly used part was gum and the most frequently used preparation method was decoction.

This review highlights that various Astragalus species have great traditional uses in different ethnobotanical practices throughout the world. However, there is still lack of phytochemical and pharmacological researches on many species of Astragalus and further studies are required to substantiate the therapeutic potential of them which will develop new generation of plant-derived drugs in the near future.

Biodiversity includes not only the species number and their abundance but also the differences in the functions of any species, which is measured by the functional diversity indices. On the other hand, land-use change and grazing are two important factors affecting biodiversity and ecosystem services. This study was carried out to investigate the effects of grazing and forestation on functional diversity indices at Cheshmeh Delav in the western part of Northern Khorasan Province, Iran.

To measure the functional diversity, the single-trait indices (community-weighted mean; CWM) and also the multiple-trait indices (functional richness, functional evenness, functional divergence, functional dispersion, Rao quadratic diversity) were used and measured by the "FD" statistical package in "R.3.3.1" software. The one-way analysis of variance (ANOVA) followed by Duncan’s test was used to compare the mean diversity.

The results showed that grazing and forestation have different effects on functional diversity indices. Based on the results, functional richness, Rao index, CWM of height and therophyte had a significant difference in the studied areas. The highest values of functional richness, Rao and CWM of the height index were related to grazing areas. Therefore, the low levels of disturbance factors such as grazing are necessary to reduce competition between plants and an increase in ecosystem function. As CWM of height was the highest at grazing sites, there was a positive relationship between functional richness and CWM. On the other hand, the maximum value of the CWM of therophyte life form was observed in the ungrazing – forestation site due to environmental adverse conditions such as high competition (due to lack of grazing) and disturbance (forestation).

Using functional diversity indices as an index of biodiversity that considers not only species abundance, but also functional traits was an effective mean in the study of the effects of different factors on biodiversity and the function of different ecosystems.

Since ancient times, plants have been commonly used to cure human ailments by indigenous people throughout the world. Nervous diseases are rising all around the world. This paper provides important ethnobotanical information on plants that are used against neurological disorders and are available in medicinal markets of Bojnord, northeastern Iran. This survey, as an ethnobotanical study, was carried out between 2017 and 2018. The identification of the intended plant species was done using the available Floras. Some important indices such as the frequency of citations, relative frequency of citation (RFC), family importance value and use report were calculated for the medicinal plants included in the present study. The present study includes 58 medicinal plant species belonging to 36 families and reports their mentioning scientific and vernacular names, parts used, and preparation method. The most common family was Lamiaceae. The major parts of the identified plants used for treatment of nervous )neuropsychological( disorders were flower and aerial parts. The most common methods used for preparation of these plants were infusion and decoction. Stachys turcomanica, Tripleurospermum disciforme, Melissa officinalis, Nardostachys jatamansi, and Aloysia citriodora had the highest rate of use report. Echium amoenum and Melissa officinalis had the highest RFC. The study indicated that although people in Bojnord have access to modern medicinal preparations, a considerable number of them still use medicinal plants for therapeutic purposes. Seemingly, most cited plants are worth more precise evaluations for their pharmacological activity.

Floristic study of a region is of great importance as the list of plants represents the genetic resources of the area. The intended region (Jozak-Chaminbid) with an area of ca. 3637.81 ha. is located in the western part of North Khorassan Province in the Maneh and Semelghan counties. Phytogeographically, this region is located in Khorassan-Kopet Dagh floristic province of the Irano-Turanian region. The mean altitude is 1415 meter and mean annual precipitation of the area is 559 mm. The plant species of the area were collected and identified according to the Floras. The floristic list of the area and its life forms and endemic species were presented. The results showed the presence of 53 families, 205 genera and 308 species. Among them 13 species were endemic to Khorassan-Kopet Dagh Province. The largest plant family was Asteraceae with 28 genera and 40 species. According to Raunkiaer’s life form categories, the identified species are categorized as hemicryptophytes 35.38%, therophytes 34.74%, cryptophytes (geophytes) 12.33%, chamaephytes 11.03% and phanerophytes 6.49%. The high percentage of hemicryptophytes indicated that the area had a cold mountain climate. The chorotype of species was obtained on the basis of the available sources. Irano-Turanian plants were the most frequent chorotype of the area with 59%.

Classification of Ecological Species Groups (ESG) in plant community analysis is one method to describe vegetation and relating them to environmental factors. This study was conducted to recognize ESG and their relationships with some environmental factors in Chamanbid-Jozak protected area from 2014 to 2016. This area is located in the eastern part of North Khorasan province, Iran. The study area contains steppe vegetation with some woodlands and shrubs of Paliurus spina–christi, Cerasus pseudoprostrata, and Cerasus microcarpa. To recognize ESG, a systematic-random sampling, by using 1 m2 Sampling Unit (SU), was carried out to provide a matrix of 74 sampling units and 42 species. Canopy cover percentage of different species was recorded in each SU. Physiographical, physical, and chemical factors, including altitude, slope, soil texture, gravel percentages, Organic Carbon (OC), Nitrogen (N), Potassium (K), lime, soil acidity (pH), Phosphorus (P), and Electrical Conductivity (EC) were measured. Euclidean distance and Ward's method of clustering were used to classify the plant species. Six ESG were detected in clustering and indicator species analyses. The relationships among these ESG and environmental factors were analyzed using Canonical Correspondence Analysis (CCA). The first ESG consisting four indicator species was influenced by organic carbon and K of almost f.0 fertile soils. ESG2 and ESG3 consisting four and one, indicator species, respectively. These ESG were only slightly affected by phosphorus and less by environmental factors evaluated in this study. ESG4, including eight indicator species was mostly affected by environmental factors such as altitude, slope, pH, and N. Both ESG5 and ESG6 were affected by gravel percentages. ESG classification of vegetation for sound and proper resource management in future via using long-term projects is recommended.

Ephedrin is the most important alkaloid in Ephedrawhich used as anti-asthmatic medicine. The aim of current study was optimization of callus induction for ephedrine production in tissue culture condition. In the current work the effect of different concentration of 2,4-D and Kin (0, 0.5, 1 and 2 mg/l) was investigated on callus induction of stem explants. The experiment was performed in complete randomized test. For this purpose, seeds were collected from Bojnoordelevations and then planted in forest soil. After 5 months, stem explants were transferred to MS medium supplemented with 2,4-D and Kin. The results showed that the highest percentage of callus formation and total alkaloid amount were observed at 0.5 and 0.5 mg/L 2,4-D and Kin. Meanwhile, Ephedrine measurement by HPLC methods showed that the highest amount of ephedrine (0.053 mg/g Dry weight) was observed in callus which induced in MS medium supplemented with 2 and 0.5 mg/l of 2,4-D and Kin.In conclusion, the current result showed that the callus which is produced by the explant can be used to make ephedrine in tissue culture condition.

Ephedra is a dioecious shrub belongs to the Ephedraceae family. Almost all commercial applications of Ephedra extracts is derived from the ephedrine alkaloids found in the evergreen stems. The purpose of this study was to investigate seed germination in green house condition and total alkaloid and ephedrine amounts measurement. The Ephedra seeds were collected from Bojnoord region and germinated on the wet paper and MS medium under control and cold treatment conditions. The results revealed that cold treatment did not show any significant effect on seed germination. To determine optimum condition for Ephedra seed germination, another experiment was performed in complete randomized design with 6 different medium culture (forest soil, Bojnoord soil, a mixture of forest and Bojnoord soil, coco peat, compost and sand) and 4 replicates. The obtained results showed that the maximum (90%) and minimum (8%) percent of seed germination was observed on forest soil and compost medium, respectively. Meanwhile the highest dry and fresh weight of shoot and root was obtained in plantlets that were grown on forest soil. On other hands, total alkaloid level in the stem organ plants that were grown on forest soil was 1/04 mg/g dry weight, but in root organ it was 0/04 mg/g dry weight. Data from HPLC analysis revealed that while root is depleted of ephedrine, the ephedrine amount in stem organ is 0.04 mg/g dry weight.