The Tibetan Plateau is highly sensitive to elevated temperatures and has experienced significant climate warming in the last decades. While known greatly impact alpine ecosystems, gas exchange responses at leaf community levels meadow ecosystems remain unclear. In this study, grass, Elymus nutans , forb, Potentilla anserina were grown open-top chambers (OTCs) for 3 consecutive years evaluate th...

Abstract Photosynthetic rate and water use efficiency (WUE) are crucial for the sustainable of in agriculture. Our objective was to analyze variability photosynthetic related traits maize ( Zea mays L.) other summer crops a temperate humid area. We evaluated parameters three years compared them pigeonpea chickpea, adapted arid environments, pepper, tomato common bean, as irrigated crops. Variab...

Net carbon assimilation and stomatal conductance to water vapor oscillated repeatedly in red kidney bean, Phaseolus vulgaris L., plants transferred from a natural photoperiod to constant light. In a gas exchange system with automatic regulation of selected environmental and physiological variables, assimilation and conductance oscillated with a free-running period of approximately 24.5 hours. T...

Since CO2 is the fundamental substrate for photosynthesis, fluctuating concentrations have a direct effect on plant growth and metabolism. Accordingly, enrichment within certain range was found to improve yields quality of plants. In order further understand underlying impact enrichment, this study employed an open-top chamber box model with following two treatments: control treatment (CO2 conc...

growth analysis is a valuable method in the study of quantitative of growth, development and crop production. in order to study the physiological growth indices of lentil plant under dry- farming conditions, an experiment was carried out as a randomized complete block design with three replications at the agricultural research station of lorestan university during 2010. in this experiment two c...

Changes in the level of metabolites of the C(4) cycle and reductive pentose phosphate (RPP) pathway were measured simultaneously with induction of photosynthesis in maize (Zea mays L.) to evaluate what may limit carbon assimilation during induction in a C(4) plant.After 20 minutes in the dark, there was an immediate rise in photosynthesis during the first 30 seconds of illumination, followed by...