Proline Alleviates Salt-Stress-Induced Enhancement in Ribulose-1,5-Bisphosphate Oxygenase Activity

Pre-treatment of Fulvic Acid Plays a Stimulant Role in Protection of Soybean (Glycine max L.) Leaves Against Heat and Salt Stress

“…Pre-treatment with fulvic acid under salt or heat stress induced rubisco expression significantly at 12 h, while this expression was induced under combination at 6 h and 12 h. This result clearly suggested that fulvic acid induces photosynthesis mechanism under stress conditions. Consistent with this result, 200 mM NaCl and heat stress has been shown to reduce rubisco enzyme activity in rice plants (Sivakumar et al, 2000) and in cotton plants (Crafts-Brandner et al, 2000).…”

Plant Water Relations: Absorption, Transport and Control Mechanisms

“…Nevertheless, proline does not only exert the function of osmoregulation in plant cells during periods of water deficit, but it can also protect against the activity of free radicals, regulate the pH in the cytoplasm, protect against the denaturation of macromolecules and also act as a source of carbon and nitrogen under conditions of stress (Sharma and Dietz, 2006;Vanrensburg et al, 1993;Sivakumar et al, 2000;Díaz et al, 1999). Another compound with importance in osmotic regulation is glycinebetaine, which, like proline, does not just exert or exercise its function in osmotic potential.…”

Spectral Remote Sensing of the Responses of Soybean Plants to Environmental Stresses

“…The antioxidant properties of phenols are mainly due to their redox properties, which allow them to act as reducing agents, hydrogen donators and singlet oxygen quenchers (Rice-Evans et al, 1997; Khan et al, 2002). Plants generally accumulate some of osmolytes such as proline under salt and drought stress (Delauney & Verma, 1993), which protect the proteins against denaturation and also act as osmotic balancing agents (Sivakumar et al, 2000). Content of total free phenols was measured according to the method developed by Swain and Goldstein (1959) using FolinCiocalteau reagent.…”

“…(Sivakumar et al, 2000;Jogeswar et al, 2006;Sun et al, 2008). Characteristic changes in proline content at the salinity stress are described in roots and leaves of alfalfa and pea (Tramontano & Jouve, 1997), and in leaves of cotton and bean (Brankova et al, 2005).…”