to find the protective role of exogenous nitric oxide (no) on salinity-stressed rice seedlings, a crd-based factorial experiment with three replications was conducted in agronomy laboratory of the faculty of agricultural sciences, university of guilan, in 2012. the experimental design consisted of healthy and vigorous seedlings of two rice cultivars, khazar and goohar, the last already known as...

samples of salvia leriifolia were collected from khorasan mountains in different growing stages. chemical composition, rumen degradability characteristics of dry matter (dm), crude protein (cp) and neutral detergent fiber (ndf) of salvia leriifolia whole plant (stem and leaves) in different flowering stages and plant leaves in comparison with alfalfa hay and triticale straw were measured using ...

The ABC model of flower organ identity is widely recognized as providing a framework for understanding the specification of flower organs in diverse plant species. Recent studies in Arabidopsis thaliana have shown that three closely related MADS-box genes, SEPALLATA1 (SEP1), SEP2 and SEP3, are required to specify petals, stamens, and carpels because these organs are converted into sepals in sep...

We present the first cladistic study of the largely tropical family Sapotaceae based on both morphological and molecular data. The data were analyzed with standard parsimony and parsimony jackknife algorithms using equally and successive weighted characters. Sapotaceae are confirmed to constitute two main evolutionary lineages corresponding to the tribes Isonandreae-MimusopeaeSideroxyleae and C...

Growth of tissues is highly reproducible; yet, growth of individual cells in a tissue is highly variable, and neighboring cells can grow at different rates. We analyzed the growth of epidermal cell lineages in the Arabidopsis (Arabidopsis thaliana) sepal to determine how the growth curves of individual cell lineages relate to one another in a developing tissue. To identify underlying growth tre...

during 2007-2008 growing season, a total of 520 sunflower leaf samples with symptoms like vein clearing, cholorotic and necrotic local lesion, deformation and stunting which were suspected of being infected with tobacco streak virus (tsv) were collected from sunflower fields of azarbayijan-gharbi, isfahan, qom, markazi, tehran and hamedan provinces. infection with tsv in collected samples were ...

jasmonates are a new group of plant growth regulator that are involved in many morphological and physiological processes and play a defensive role in plants. in this research, the effects of methyl jasmonate and ethylene and their interaction, on parameters like fresh weight, dry weight, leaf area and quantity protein, malodealdehyde and electrolyte leakage in leaves canola (brassica napus l.) ...

Senescence is a genetically regulated oxidative process that involves a general degradation of cellular structures and enzymes and the mobilization of the products of degradation to other parts of the plant. The cDNA-AFLP (cDNA-Amplified Fragment Length Polymorphism) analysis has been used under stringent PCR conditions afforded by ligation of adapters to restriction fragments, and the use of s...

this study was performed in order to evaluate the effects of irrigation and application of zn fertilizer on  seed storage proteins  in chickpea, azad cultivar. experiment was performed in an factorial using randomized complete block design with three replications. in this experiment, two factor consist of irrigation in three levels (i1= non irrigation and i2= irrigation in flowering stage), zn ...