The measurement of carbon isotope discrimination (∆) provides an integrated insight into theresponse of plants to environmental change. To investigate the potential use of ∆ for identifyingshade tolerance in rice, five rice varieties were selected and artificially shaded (53% lightreduction) during the grain-filling period in 2010 and 2011, in Sichuan, China. Shadingtreatment had a significant ...

The circadian system allows plants to coordinate metabolic and physiological functions with predictable environmental variables such as dusk and dawn. This endogenous oscillator is comprised of biochemical and transcriptional rhythms that are synchronized with a plant's surroundings via environmental signals, including light and temperature. We have used chlorophyll fluorescence techniques to d...

The psbA (encoding D1 protein) plays an important role in protecting photosystem II (PSII) from oxidative damage in higher plants. In our previous study, the role of the psbA from maize (Zea mays. L) in response to SO2 stress was characterized. To date, information about the involvement of the psbA gene in drought response is scarce. Here we found that overexpression (OE) of ZmpsbA showed incre...

With the intensification of global warming, high temperatures during rice’s growth and development could further lead to a deterioration in rice yields. Therefore, it is particularly important clarify response booting stage temperatures, explore reasonable countermeasures on this basis reduce yield losses. Methyl jasmonate (MeJA) derivative jasmonates widely used for stress resistance. However,...

Photosystem II (PSII) of photosynthesis has the unique ability to photochemically oxidize water. Recently an engineered bacterioferritin photochemical 'reaction centre' (BFR-RC) using a zinc chlorin pigment (ZnCe6) in place of its native heme has been shown to photo-oxidize bound manganese ions through a tyrosine residue, thus mimicking two of the key reactions on the electron donor side of PSI...

Kinetic Monte Carlo (KMC) simulation is employed to represent the photochemical reactions involved in the initial phases of chlorophyll fluorescence (ChlF) emission from photosystem II (PSII). Comparison with a differential equation representation reveals similarities and differences. Both KMC and differential equation models can describe the kinetic variations and show the main characteristics...

Potassium is an essential nutrient for plants and its limited resources impose the improvement of fertilizer-use efficiency. To address this issue, it important to understand roles in photosynthesis provide a quick, noninvasive method diagnosing deficiency plants. The impact potassium on photochemical phase has not been well understood. In work, we present K+-deficiency effect gas exchange, chl...

Aim. The effect of sodium chloride on the physiological and biochemical parameters wheat maize genotypes, identification salinity-resistant varieties was studied. Wheat plants were grown in pots soil with addition 0.5 % chloride. To create new salt-tolerant maize, a comparative analysis morphophysiological carried out. Methods. Morphophysiological such as growth, chlorophyll carotenoid content,...

The effects of solar ultraviolet (UV)-B and UV-A radiation on the potential efficiency of photosystem II (PSII) in leaves of tropical plants were investigated in Panama (9 degrees N). Shade-grown tree seedlings or detached sun leaves from the outer crown of mature trees were exposed for short periods (up to 75 min) to direct sunlight filtered through plastic or glass filters that absorbed eithe...