جستجوی مقالات مرتبط با کلیدواژه "inflorescence" در نشریات گروه "باغبانی"

 Medicinal plants have played an essential role in the development of human culture. Medicinal plants are resources of new drugs and many of the modern medicines are produced indirectly from plants. Although the production of secondary metabolites is controlled by genes, their production is considerably influenced by environmental conditions, so environmental factors cause changes in the growth of medicinal plants as well as the amount of active substances. Essential oil quantity and quality are affected by the different environmental conditions. Physiological, morphological and genetic variations were seen in populations of species that occurred in different habitats. These variations were created in response to contrasting environmental conditions. In many plant species, studies on the pattern of variation in populations have shown the localized populations are adapted to the particular environmental conditions of their habitat. The genus Phlomis L. (Lamiaceae) includes about 113 perennial herbs or shrubs distributed in Asia, Europe, and Africa. Some of the Phlomis species have been reported for their traditional uses as analgesic, diuretic, tonic, anti-diarrheic agents and to treat various conditions such as gastric ulcer, inflammation, diabetes, hemorrhoids and wounds. In Flora of Iran, this genus is represented by 20 species, including Phlomis olivieri Benth.
 This study was conducted to evaluate the morphological and phytochemical diversity of eleven populations of P. olivieri Benth. from different districts of Hamedan province in 2021. Traits such as plant height, stem diameter, leaf length and width, fresh and dry weight of the flowering branch, inflorescence length, fresh and dry weight of the plant, number of inflorescence cycles, essential oil percentage were measured. In order to investigate the physical and chemical properties of soil, soil samples were collected from a depth of 30 cm. Then they were transferred to the soil laboratory. Plants samples were collected in the flowering stage and were dried at 25-30°C. They were stored in envelopes at 22±3°C away from the sun. For extracting the essential oil of the samples, 100 gr of the plant was milled and then distilled with water. Hydrodistillation lasted for 4 hours. The main components of essential oil were identified and determined by gas chromatography in the Institute of Medicinal Plants in Karaj. Gas chromatography was carried out on Agilent 6890 with capillary column 30m*0.25 mm, 0.25 mm film thickness. The grouping of populations based on morphological and phytochemical traits was done by cluster analysis in SPSS using the Ward method. Also, the traits correlation (quantitative) was done using the Pearson method.
 According to the results, the highest fresh and dry weight of flowering branch (6.96 g and 3.48 g) and also the highest fresh and dry weight of the plant (11.77 g and 5.86 g) belonged to the Koohani population. The tallest inflorescence (24.2 cm) belonged to the Jowzan population and the shortest inflorescence belonged to the Gammasiab population (8.9 cm). The highest stem diameter (4.45 mm) was observed in the Garin population. The maximum plant height (49.4 cm) was related to the Rahdarkhaneh population, which was not significantly different from the Garin population, and the minimum was related to the population of Garmak (31 cm), which was not significantly different from the population of Gammasiab (33.50 cm). Also, 31 compounds were identified in this plant essential oil that caryophyllene, germacrene D, and (E)-b-Farnesene had the highest percentage of essential oil constituents. In this study, the highest amount of essential oil (0.04%) was related to the Koohani population which had the lowest altitude among other populations. Therefore, it seems that environmental factors, as well as genetic factors, have been effective in creating diversity in morphological and phytochemical characteristics of this plant.
 The results obtained from this study showed that P. olivieri Benth. populations gathered from different regions of Hamedan province, had a high diversity in terms of essential oil content. The results showed that in addition to genetic factors, environmental and climatic factors also affect phytochemical traits. In this study, the highest amount of essential oil was produced in the Koohani population (located in Nahavand city) with the lowest altitude among other populations. According to the research on the essential oil components of P. olivieri in different regions of Iran, the components of its essential oil and their percentages are completely different; so, some of the components that are seen in one region, are not observed in another region, and this issue emphasizes on the effect of climatic conditions. This difference is quite evident even in the studied populations in a province.

 Grape (Vitis vinifera L.) is one of the most important economic plants in the world including Iran. One of the most basic effective factors of the growth of fruit trees is knowing their nutrition. Micronutrients are as important as Macronutrients for better growth, yield and quantity in plants. Garden plants suffer from severe zinc deficiency, followed by boron, manganese, iron and molybdenum. Foliar application of fertilizers is a useful tool to increase the nutritional effects of fertilizers or eliminate nutrient deficiencies during the growing season. The aim of this study was to study the nutritional effects of consumption of different compounds of micronutrient fertilizers of zinc chelate, iron and manganese as foliar consumption on the morpho-physiological traits of grape plant.

 Field experiments were carried out to evaluate the effects of micronutrients alone and in combination on growth and fruit yield in grape grown at Iran, Zanjan province during 2016-18.  Physical and chemical properties of the soil were evaluated before the experiment. During the two years of the research, no organic or chemical fertilizers were used except for the combination of fertilizer treatments of the relevant design. Treatments consist of foliar consumption of micronutrients fertilizers included two levels of EDDHA-Zn (0.1 and 0.3 %), EDDHA-Fe (0.1 and 0.2 %), and EDDHA-Mn fertilizers (0.1 and 0.2 %) and control levels (0 %) for them. This experiment was implemented in a factorial format based on a randomized complete block design with three replications and repeated for two consecutive ys.  The measured traits consist of Length of the First inflorescence (X1), Number of Inflorescences per Branch (X2), Number of clusters per branch (X3), Number of Clusters per Plant (X4), Weight of a Cluster (X5), Cluster Size (X6), Berry Size (X7), Number of Berries per Cluster (X8), Weight of single Barry, X10: Leaf Area Surface. Leaf Dry Matter (X11), TSS (X12), Sugar Fruit Juice (X13), Fruit Juice Acidity (X14), Fruit Dry Matter (X15), Fruit Firmness (X16), Yield per Plant (X17), Yield per Hectare (X18). The experiment was performed in factorial format with three factors, each at three levels, based on a randomized complete block design with three replications in three locations (g; G) and in each location for two consecutive ys (Y). The analysis of each g was analyzed in the form of factorial experiment design and the effect of location factor was analyzed in the form of factorial-split (time) composite analysis in place. In the statistical model used, time and place factor considered as random and treatment was fixed.

 Evaluation of morpho-physiological traits showed that the use of these fertilizers individually or in combination has significant positive effects on all measured traits (18 traits) at different stages of development. The simple effect of the factor of the y was significant only on some of the measured traits and the two and three-way interactions between this factor with the levels of treatment in the majority of traits were not significant; which indicates the probability that the factor of the y has no effect on the measured traits. Based on these results, the treatment combination of Fe 0.2 + Zn 0.3 + Mn 0.2 % EDTA was superior to other combinations, and traits of the number of inflorescence and number of clusters per branch and number of clusters per plant showed the best response than other measured traits. Consumption of micronutrients, especially iron, zinc and manganese, has favorable effects on yield indices, better fruit formation and fruit production per unit area, which affects photosynthetic activities and important metabolic pathways in plants, leading to produce higher amounts of primary metabolites such as higher sugar production in fruit, increase in soluble solids, also increase in growth indices such as leaf area, more yield-related traits such as number of inflorescences and number of spikes per branch and per plant, number and the dimensions of the cube are in clusters. On the other hand, these compounds help to absorb the main nutrients and play an active role in initiating metabolic processes such as cell wall development, respiration, photosynthesis, chlorophyll formation, enzymatic activities, production of growth regulators, and nitrogen fixation and reduction. Accordingly, these compounds were able to show better performance compared to the control level by accelerating the absorption of other nutrients, strengthening biochemical pathways and growth indices.

 According to these results, the application of three fertilizers of zinc, iron and manganese EDTA individually or in combinations of two or three of them, especially at high concentrations simultaneously, is superior in comparison. And the treatment composition of 0.3% zinc + 0.2% iron + 0.2% manganese EDTA and then 0.3% zinc + 0.2% iron + 0.1% manganese EDTA has more significant and positive on measured traits and therefore as fertilizer compositions are recommended in vineyards in the form of leaves.

Inflorescences of date palm (Phoenix dactylifera L.) are encapsulated in a cover known as spathe, containing essential oil. In this study the impact of growth location (Bam and Jiroft) on the essential oil content and composition of date palm varieties (Piarom, Zahedi, Mozafati, and Hallilehie) was investigated. The essential oils were obtained by hydrodistillation and analyzed by GC and GC/MS. Results showed that effect of variety on morphological traits was more than growth location and Mozafati’ and ‘Hallilehie’ varieties showed the highest spathe length (55.06 and 48.80 cm). The highest spathe width was recorded for 'Mozafati’ and ‘Piarom’varieties (11.52 and 10.83 cm), and ‘Zahedi’ variety had the highest spathe number per palm tree (14.83). On the other hand, spathe fresh and dry weight and spathe dry matter yield in Bam (235.30 and 67.66 g/spathe, and 747.906 g/palm tree) were 38%, 48%, and 41% greater than those in Jiroft, respectively. The essential oil per palm tree in Bam (1.246 g) was 2.26 times greater than that in Jiroft (0.551 g). The ‘Mozafati’ variety had the highest spathe fresh weight, dry weight, and dry matter yield. The highest essential oil percentage (0.148-0.168%) belonged to ‘Zahedi’ and ‘Piarom’ varieties. The essential oils of all four varieties in both growth location contained five chemical compounds of 3,4-dimethoxytoluene (58.7-71.2 %), p-methylanisole (4.2-30.0 %), 2,6-dimethoxytoluene (8.6-16.8 %), n-nonanol (0.6-4.1%), and o-vanillin (0.5-2.6%). The studied varieties were divided into two groups in terms of their effectiveness from the growth location. The Hallilehie and Mozafati varieties showed higher relative stability.

Water stress limits crop production throughout the world and contrary to other limiting factors (acidity, sodicity and salinity). It is highly variable within growing season and from year to year. Plants response to water deficit at morphological, anatomical and cellular levels by modifications allowing them to avoid stress or increase tolerance. When supply of water is limited, crop management practices that improve water stress resistance can benefit plant growth and improve water use efficiency.  Onion seed production has high requirements in inorganic fertilizers. The applied amount depends on the type and fertility status of the soil. The use of inorganic fertilizers is common in onion production. Onion is responsive to nitrogen fertilizer. The bulb refers to a fleshy structure serving as storage organ, and containing simple and sugars, sulfur, protein and nitrogen compound containing flavor precedents as well as a significant amount of water in the swollen cells producing the bulk of the bulb scales. In order to evaluate the effects of deficit irrigation, nitrogen levels and bulb size on seed yield and reproduction traits of onion (Allium cepa var. Ghooli gheseh), was conducted in Zanjan areas. In order to study the effects of nitrogen levels, bulb size and water tension at various growth stages on onion seed yield (Allium cepa var. Ghooli gheseh), an experiment was conducted in Zanjan University in 2014. The experiment was strip split plot with a randomized complete block design with three replications. Water tension was applied at the beginning of flowering, end of flowering, as well as the milking stage of seed by avoiding irrigation at those stages. The obtained seed yield was compared with that of control or treatment with normal irrigation (no water tension). The irrigation treatments including control were located on horizontal plots and vertical plots allocated to nitrogen levels (0, 75, 150 and 300 kg N ha-1) and bulb sizes (5-7 and 7-9 cm diameter). Traits such as days to inflorescence emergence, days to flowering, number of inflorescence per plant and seed yield were measured. All data were subjected to analysis of variance (ANOVA) using SAS 9.3 software. When F test indicated statistical significance at P< 0.01 or P < 0.05, the least significant difference (LSD) was used to calculate the means. The effect of water tension on seed yield and days to seed ripening were significant at 1% probability level. Water tension at milking stage of seed, end of flowering and beginning of flowering reduced seed yield in comparison with the control and yield decreased by 10.5, 12 and 39.5%, respectively. The highest seed yield (659.4 kg ha-1) was obtained in the control. Although the main effect of nitrogen was not significant, application of 150 kg N/ha increased inflorescence diameter, percentage of fertile florets and seed yield about 5.6, 4.9 and 20%, respectively in comparison with the control (N0). Application of nitrogen up to 150 kg ha-1 significantly increased days to seed ripening. Days to inflorescence emergence, days to flowering, number of inflorescence per plant and seed yield were affected significantly by bulb size. In onions, many factors such as bulb weight, cultivars, spacing, date of planting, climate, soil, besides fertilizer application seem to affect seed yield and quality. Moreover, according to Mishra, (1994), applying nitrogen has been revealed to enhance the number of umbels per plant in onion. Based on Islam et al. (1998), the larger sets associated with the closest spacing resulted in the highest bulb yield. Smaller set with zero nitrogen level led to the maximum number of single bulbs. The closest spacing with 120 N/ha resulted in the highest bulb yield, as well. The highest bulb yield from the combination of larger sets and closest spacing was equal to 120 kg N/ha. Smaller sets and the closest spacing zero N level yielded the highest number of single bulbs. For onion seed production in climatic conditions similar to those in Zanjan areas, application of normal irrigation, bulb diameter of 7-9 cm and 150 kg N ha-1 are recommended.

In order to evaluate the effect of harvest time on fruit weight, oil content and fruit bearing in the next year in some cultivars of olive (Conservalea, Amygdalolia, Karidolia, Koroneiki, Arbequina, Zard and Rouwghani), an experiment was performed as a split plot in time based on CRD (Completely Randomized Design) with three replications at olive research station (Tarrom–Zanjan) during 2013 and 2014. Results showed that among the cultivars, Amygdalolia had the most (number of inflorescence and flower per branch, fruit weight and oil content). Also, highest percentage of complete flower formation, initial fruit set and final fruit set were obtained in cv. Arbequina. According to the effect of harvest time, the most fruit weight was observed at the third harvest. Fruit oil content reached its maximum level at fifth harvest time. Effect of harvest time on flowering and fruit set in the next year, indicated that the highest number of inflorescence and flower per branch as well as maximum percentage of complete flower formation, initial fruit set and final fruit set were obtained at the fourth , second and the third harvest time, respectively. Interaction between harvest time and cultivar on fruit fresh weight, oil percentage, inflorescence number, flower number per branch , complete flower formation percentage , initial and final fruit set were significant (p≤%1). Due to evaluated traits, the best olive fruit harvesting time to prepare canned and oil extraction should be late September and late October respectively.

In order toa desirable growth، plants need fertile soil which has the availability of nutrient elements in it. Sometimes، in spite of having access to the nutrient elements، decrease yield، due to undesirable physical situation. Stock (Matthiolaincana cv. Column Crimson) is one of the potting flower that its growth medium traditionally including HAWAR soil، basin sediment and untreated waste municipal. Due to decrease reach to mentioned soils، so that، it is necessary to replace a growth medium and surveying the effect of different organic matter in pot stock. Garden soil was used as main source of medium and as control. In this study، treatments including garden soil amendment by 4 and 8 % (w/w) of different organic matter (untreated waste municipal، beet pulp، leaf mold، and municipal compost). Another treatment was traditional growth medium. This research was performed in a randomized complete block design with four replications. Result showed that manure treatments on plant height، floret diameter، carbohydrate content had significant different (p).

To study the effect of plant density and planting pattern on Iranian ox-tongue, an experiment carried out with two factors: planting pattern (square and rectangular pattern) and plant density (2, 4, 6, 8 plant m-2) in a factorial test performed based on RCBD in 3 replications during 2009-2010 in Latmahalleh Eshkevarat village in Guilan province, Iran. Characteristics that measured included: dry flowers yield, plant dry-weight, number of inflorescence per plant, number of flower per inflorescence, plant height and flower length. The results indicated that effect of plant density on dry flowers yield, plant dry weight, number of inflorescence per plant, number of flower per inflorescence and flower length (P

In order to explore biodiversity of Fusarium species associated with the inflorescences of poaceous weeds, heads and inflorescences were collected from wild grasses in Ardabil province (Iran). Fusarium species were isolated using general and selective media. Pure cultures were established using a single spore technique. The isolates were identified based on morphological and molecular data. Sequence data were generated for TEF-1' gene, following PCR amplifciation. The results revealed that several species of Fusarium are present on inflorescences of wild grasses in Ardabil province. Among the identified species, F. brachygibbosum, F. torulosum and F. cf. reticulatum var. negundis represent new records to the mycobiota of Iran. There is no description available for these taxa in Persian literature and references to the original descriptions are not easily accesible. Here we provide detailed descriptions for these taxa and discuss their morphology, phylogeny and ecology. This is the first study on biodiversity of Fusarium spp. associated with the inflorescences of wild poaceous grasses by using a combination of morphology and DNA sequence data.

This experiment was carried out in 2003-2004 to determine fruit set patterns in four pistachio cultivars (Akbari، Ahmad Aghaie، Kalle Ghouchi and Ohadi) to find out the correlation between final fruit set and embryonic sac development، and as well between primary fertility and final fruit set. In a field experiment، inflorescence schematic shape and position of flowers (on inflorescence on the basis of ovary developmental size) were precisely monitored. In addition، the position of fruits، and final fruit set were recorded at the end of the season again. For an inspection of embryonic sac، ovules from different size ovaries were excised followed by fixation، sectioned، stained and then were investigated. The results indicated that flowers located at the end of cluster or on bunchlets had higher fruit set (20. 5% and 27. 44%، respectively). Most of the large flowers positioned at the top of bunch and bunchlets، although few in number (11℅)، developed into fruits (by 45℅). Eighty nine percent of flowers were of the lateral type، but their only 8℅ developed into fruits. Fruit set in type one flowers was maximum (32℅). There were no significant differences observed among cultivars for fruit set، and no significant differences as regards fruit set between on and off-years either. Ahmad Aghaie cultivar had the highest embryo sac fertilization. However، the overall embryo sac development and fertility were not significantly affected by cultivar. Flowers type one had the highest rate of developed embryo sac and fertilization (87. 5% and 37. 5℅، respectively). Fertilization for the second and third types of flowers were recorded as 18. 75% and 12. 5℅، respectively، about equal to their fruit set.