When young plants o f barley and wheat grown in hydroponic culture were subjected to salt stress, their freezing tolerance increased with increasing severity o f salt stress. Detached leaves from salt-stressed plants also exhibited an increased ability to supercool. Avoidance o f ice for­ mation permitted leaf survival at subzero temperatures which were no longer tolerated when ice nucleation r...

The influence of drought stress on internal water status and the final grain yield of three Egyptian corn (Zea mays L.) genotypes; GIZA2, TWC310 and TWC320 at different developmental stages was investigated. Plants grown in pots were subjected to four levels of water stress at vegetative and tassel emergence stages. Exposure of plants to drought led to noticeable decreases in leaf water potenti...

In this study, ion exchanges in eggplant plants exposed to drought, salt, and combined stress were researched. While drought-stressed irrigated at 60% FC, salt-stressed with water containing 50 mM sodium chloride (NaCl). Plants under (NaCl) FC. The remained conditions for 90 days, after which they harvested evaluated their content. Ca2+, K+ Mg2+ contents the shoot root decreased significantly s...

In this study, we examined the possible mechanisms of trehalose (Tre) in improving copper-stress (Cu-stress) tolerance in rice seedlings. Our findings indicated that pretreatment of rice seedlings with Tre enhanced the endogenous Tre level and significantly mitigated the toxic effects of excessive Cu on photosynthesis- and plant growth-related parameters. The improved tolerance induced by Tre c...

Mesembryanthemum crystallinum responds to salt stress by switching from C(3) photosynthesis to Crassulacean acid metabolism (CAM). During this transition the activity of phosphoenolpyruvate carboxylase (PEPCase) increases in soluble protein extracts from leaf tissue. We monitored CAM induction in plants irrigated with 0.5 molar NaCl for 5 days during the fourth, fifth, and sixth week after germ...

In this research we investigated the role of Si in improving salt tolerance in  the medicinal plant Borago officinalis L. Borago was pretreated with 0, 0.5  and 1.5 mM Si (as sodium silicate, Na2(Si O2)3) and then treated with four levels of NaCl, namely, 0, 60, 90 and 120 mM NaCl. Then the effects of silicon and NaCl were observed on some physiological and biochemical parameters such as lipid ...

The effects of five strobilurin (beta-methoxyacrylate) fungicides and one triazole fungicide on the physiological parameters of well-watered or water-stressed wheat (Triticum aestivum L.), barley (Hordeum vulgare L.) and soya (Glycine max Merr.) plants were compared. Water use efficiency (WUE) (the ratio of rate of transpiration, E, to net rate of photosynthesis, A(n)) of well-watered wheat pla...

In plants, the galactolipids monogalactosyldiacylglycerol (MGDG) and digalactodiacylglycerol (DGDG) are major constituents of photosynthetic membranes in chloroplasts. One of the key enzymes for the biosynthesis of these galactolipids is MGDG synthase (MGD). To investigate the role of MGD in the plant's response to salt stress, we cloned an MGD gene from rice (Oryza sativa) and generated tobacc...

environmental variables, including soil water content (swc), act as constraints on crop growth and productivity. therefore, open air (e0), perforated (e1) and non-perforated (e2) plastic housings were used with well-watered (w0), moderately-watered (w1) and water-stressed (w2) bush bean plants to explore the relationships between water-use efficiency (wue), carbon isotope discrimination (δ) and...

Phytohormones such as auxin are known to be involved in alleviating the detrimental effects of salinity by modulating the activity of enzymatic antioxidants and improving antioxidant system, which help in sustaining plant growth. The present study envisaged revealing the role of exogenous application of indole-3-acetic acid (IAA) in improving defense mechanisms in two genotypes (FL485 and IR29,...