The heat tolerance of plants can be improved by using exogenous calcium chloride (CaCl2) to cope with temperature fluctuations. Since global climates continue warm, it is important further explore the way in which respond stress use CaCl2. We aimed effect CaCl2 on leaf microstructure, epidermal ultrastructure, and chlorophyll a fluorescence Rhododendron × pulchrum (R. pulchrum) under stress. In...

Global climate change, specifically the intensification of marine heatwaves, affect seagrasses. In Ria Formosa, saturating light intensities may aggravate heatwave effects on seagrasses, particularly during low spring tides. However, photophysiological and antioxidant responses seagrasses to such extreme events are poorly known. Here, we evaluated Cymodocea nodosa exposed at 20 °C 40 150 450 ?m...

Drought stress is one of the major threats to rice production. The weakening leaf photosynthesis due drought main reason for reduction grain yield, but its mechanism still obscure. objectives this study were reveal physiological affecting photosynthetic capacity and yield. Pot experiments conducted with drought-tolerant cultivars Hanyou113 (HY113) Zhonghan3 (ZH3) drought-sensitive cultivar Huan...

Water deficit is a significant abiotic stress affecting crop growth and production. While many studies have indicated that salicylic acid (SA) plays crucial role in mitigating the detrimental effects of environmental on plants, its mechanism regulating photosynthetic adaptability maize seedlings under water still unclear. This study aimed to investigate impact exogenous SA seedling performance ...

Saturating pulse fluorescence measurements, well known from studies of higher plants, were applled to cultures of the chlorophyte Dunallella tertiolecta Photochemical and non-photochemlcal quenching, and the photochemlcal yield and photochemical efficiency of photosystem 11, were deternuned for cultures of D tertiolecta growing under varying light intensit~es Photosynthetic efflciencies appeare...

Effects of leaf rolling (LR) on maize photosynthesis under severe drought stress were studied in two cultivars with opposite drought responses, Batem 56-55 (drought tolerant) and Batem 51-52 (drought sensitive). Drought stress and artifi cial prevention of leaf rolling (PLR) were applied at grain fi lling stage for 30 days. LR in Batem 56-55 occurred later than in Batem 51-52. Leaf water potent...

Photochemical quenching, nonphotochemical quenching, and yield of photosystem II were measured on seedlings of full-sibling, open-, and self-pollinated slash pine (Pinus elliottii Engelm. var. elliottii) families. Our results reveal that genetic variation in photochemical quenching and yield of photosystem II exists within this species. The pattern of variation found in these traits is consiste...

Seedlings of Citrus grandis (L.) Osbeck cv. Tuyou were irrigated daily for 5 months with nutrient solution containing 0 (control), 0.2, 0.6 or 1.6 mM aluminum (Al) from AlCl(3).6H(2)O. Shoot growth was more sensitive to Al toxicity than root growth, gas exchange, chlorophyll (Chl) concentration, polyphasic Chl a fluorescence (OJIP) induction and related parameters. Leaves of Al-treated plants s...