drought is the most significant constraint for crop production in arid and semi-arid regions. in order to assess drought tolerance in fifteen rapeseed (brassica napus) cultivars using yield-based drought tolerance indices, two experiments were conducted at the research station of college of agriculture, shiraz university, shiraz, iran during 2009-2010 growing season. the cultivars were arranged...

objective(s): due to the prevalence and pervasiveness of stress in modern life and exposure to both chronic and acute stresses, it is not clear whether prior exposure to chronic stress can influence the impairing effects of acute stress on memory retrieval. this issue was tested in this study. materials and methods: adult male wistar rats were randomly assigned to the following groups: control,...

the effect of seed inoculation by phosphate solubilizing microorganisms on growth, yield and nutrient uptake of maize (zea mays l. sc. 704) was studied in a field experiment. this experiment was conducted in meshkin abad experimental station during 2005. the experiment design consisted of four randomized complete blocks in a split-factorial arrangement. the main-plots regarding simulating water...

the experiment was aimed at investigating the effects of defoliation (i. e. amanipulation of source size) at different times and with different intensities on yield, grain protein content and remobilization of dry matter from shoot to grain under various levels of soil moisture and nitrogen in winter wheat. two separate field experiments were conducted simultaneously under water stress vs irrig...

the selection of high yielding and stress tolerance plant genotypes with the highest water use efficiency and productivity is one of the most important tools for field water management in arid and semi-arid regions. this study was conducted to identify drought tolerant flax families with the highest irrigation water productivity (iwp) among a population of 119 f3 families derived from a cross b...

background managing and coping with occupational stress as a recognized problem in the modern era, is vital and important. nursing is by nature a stressful occupation. continuous and long-term stress can result in physical, psychological, and behavioral problems in nurses. we aimed to assess occupational stress in nurses working in surgical, internal and psychiatric wards in teaching hospitals ...

background: studies have shown that nurses are under considerable job stress, which can lead to health disorders and failure in duties. stressors of nursing have been studied in some of quantitative studies; however, a few investigators have studied the nurses’ life experiences in this regard. the current qualitative research aimed to understand the nurses’ experiences and perceptions of job-re...

the responses of yield and yield components of 24 advanced bread wheat genotypes to pre- and post-anthesis drought stress conditions were studied at ardabil agricultural re-search station during the 1997-2000 cropping seasons. results showed that genotypes produced significantly lower spikes no./m2, seeds no./spike and grain yield under pre- than in post-anthesis drought stress conditions. howe...

in order to evaluate the utilization ability of drought resistance indices such as: yield index (yi), yield stability index (ysi), stress susceptibility index (ssi), tolerance (tol), mean productivity (mp), geometric mean productivity (gmp) and stress tolerance index (sti) in sunflower hybrids, three separate experiments were conducted as randomized complete block design at the research field o...