ABSTRACT The objective of this study was to evaluate the quantum yield and concentrations photosynthetic pigments naturally colored cotton genotypes under irrigation with waters different electrical conductivities foliar applications hydrogen peroxide. design used randomized blocks in a 4 × 3 2 factorial arrangement, corresponding four peroxide - H2O2 (0, 25, 50 75 μM), three fiber (‘BRS Rubi’,...

Chlorophyll fluorescence has been used to predict and monitor coral bleaching over short timescales (hours to days), but long-term changes during recovery remain largely unknown. To evaluate changes in fluorescence during long-term bleaching and recovery, Porites compressa and Montipora capitata corals were experimentally bleached in tanks at 30 degrees C for 1 month, while control fragments we...

Photosystem II is extremely susceptible to environmental alterations, particularly high temperatures. The maintenance of an efficient photosynthetic system under stress conditions one the main issues for plants attain their required energy. Nowadays, searching alleviators goal maintaining productivity and, thereby, crop yield global climate change. Potassium silicate (K2SiO3, 1.5 mM) and silico...

The potential of measurements of chlorophyll fluorescence in vivo to detect cellular responses to salinity and degrees of salt stress in leaves was investigated for three crop plants. Sugar beet (Beta vulgaris L.) (salt tolerant), sunflower (Helianthus annuus L.) (moderately salt tolerant), and bean (Phaseolus Vulgaris L. cv Canadian Wonder) (salt intolerant) were grown in pots and watered with...

To understand the responses of rice seedlings to different high-temperature stresses, seven-day-old rice seedlings were exposed to different high temperatures for 48 h, and the maximal quantum yield of PS II photochemistry measurements, ascorbate peroxidase activity assays and proteomic analyses in leaf tissue were performed. The results showed that when rice seedlings were exposed to high temp...

Limitations of soil water and nitrogen (N) are factors which cause a substantial reduction in cotton (Gossypium hirsutum L.) yield, especially in an arid environment. Suitable management decisions like irrigation method and nitrogen fertilization are the key yield improvement technologies in cotton production systems. Therefore, we hypothesized that optimal water-N supply can increase cotton pl...

Supplemental artificial light in greenhouses is fundamental to achieving sustainable crop production with high yield and quality. This study’s purpose was investigate the efficacy of supplemental (SL) sources on vegetative reproductive growth cherry tomatoes. Four types were applied, including high-pressure sodium lamps (HPS), a narrow-spectrum LED (NSL), two specific full-spectrum lights (SFL1...