جستجوی مقالات مرتبط با کلیدواژه "plant" در نشریات گروه "زیست شناسی"

Qom province has a dry climate according to the Domarten classification, but some aquatic and wet habitats in different parts of the province have provided the possibility of growing various aquatic and waterfront plants. In this study, plants that grew in aquatic and moist habitats of the province were collected in different seasons of the year and, after transfer to the herbarium, were identified based on relevant botanical literature. A total of 73 taxa including four species of green macroalgae (charophytes), one species of bryophyte, and 68 species of vascular plants from different parts of the province were identified. Dicotyledonous plants accounted for 77% and monocotyledonous plants for 12% of the studied habitats. Amaranthaceae and Caryophyllaceae were the most present families. Among the collected plants, therophytes and hemicryptophytes are the most abundant life forms, followed by geophytes. In terms of phytogeographical distribution, most of the vegetations of the studied habitats were assigned to the Irano-Turanian chorotype, followed by pluriregional elements, Irano-Turanian / Mediterranean, and Euro-Siberian / Irano-Turanian / Mediterranean. Generally, the observed chorotypes revealed the ecotone situation of Qom province.

The main basis of ecological research is the accurate identification of vegetation. Because it is an effective factor in measuring and evaluating the current situation and predicting the future situation of the region and will play an important role in proper and scientific management. For this purpose, in this study, the flora, life form and chorothype of plants in Bardkal watershed located in the northwest of Shiraz were introduced. The results showed 127 plant species which belong to 34 families and 102 genera. There are species in this watershed. The largest families Asteraceae with 24 species, Fabaceae with 17 species and Poaceae with 15 species, are in the first to third ranks, respectively. In terms of life form, 48 species of Therophytes, 34 species of Hemichryptophytes, 18 species of Camophytes, 14 species of Geophytes and 13 species of Phanerophytes were identified. The results of Chorothype plants in this watershed also showed that 122 plant species, which is equivalent to 96.07% of the total species, are located in a single-zone or multi-zone in the Iran-o-Turanian region.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a novel coronavirus responsible for an ongoing human pandemic (COVID-19). There is a massive international effort underway to develop diagnostic reagents, vaccines, and antiviral drugs in a bid to slow down the spread of the disease and save lives. One part of that international effort involves the research community working with plants, bringing researchers from all over the world together with commercial enterprises to achieve the rapid supply of protein antigens and antibodies for diagnostic kits, and scalable production systems for the emergency manufacturing of vaccines and antiviral drugs. Here, we look at some of the ways in which plants can and are being used in the fight against COVID-19.

Unlike animals, plants do not have mobile defense cells and their immune systems are not naturally capable of developing and adapting to pathogens. The innate immune system of plants is very complex and organized in two important layers and extensively depends on signaling pathways. Each layer is composed of many components, which timely play their roles, chemical and physical barriers preventing pathogens or oxidative bursts, pathogen-related proteins, and programmed cell death that induced after pathogen recognition are all parts of plant complicated immune system. Transcriptome analysis of the plant pathogen interaction and listing differentially expressed genes (DEGs) shed light on the plant complicated responses to pathogens. The high throughput RNA-seq technology, developed after Next-generation sequencing arrival, is of the most used techniques in DEG analysis. Here, the basics and steps of the RNA-seq technique to study of the plant defense responses were summarized.