A review of ascorbic acid potentialities against oxidative stress induced in plants

Abstract

A review of ascorbic acid potentialities against oxidative stress induced in plantsAscorbic acid (AA) currently holds a significant position in plant physiology, mainly due to its possession of antioxidant and cellular reductant etc.properties and its diverse roles in plant growth and development and the regulation of a broad spectrum of plant cellular mechanisms against environmental stresses. Some researchers suggest that endogenous AA has been implicated in the promotion of plant growth and development by involvement in a complex and enigmatic array of phytohormone-regulated signalling networks that ties together different environmental stresses. As it is evident from the present review, recent progress on AA potentiality in the tolerance of plants to environmental stresses has been impressive. Indeed, AA plays an important role in resistance to oxidative stresses such as heavy metal, saline, ultra-violet etc. Rapidly increasing evidence indicates that AA is centrally involved in several physiological processes but there has been much disagreement regarding the mechanism(s) by which AA reduces the damaging effects of such stresses in plants. Perhaps the role of AA in mediating tolerance to abiotic stress (e.g. UV, salinity and temperature, etc.) will lead to a greater research focus in the near future. In addition, AA might provide a suitably attractive target for the enhancement of crop production.

Effects of ascorbic acid and gibberellin A3 on alleviation of salt stress in common bean (Phaseolus vulgaris L.) seedlings

“…In addition, ascorbate is a co-factor for prolyl-hydroxylase that post-translationally hydroxylates proline residues in cell wall hydroxyprolinerich glycoproteins required for cell division and expansion (Smirnoff and Wheeler 2000). Moreover, AsA increases the content of IAA, which stimulates cell division and/or cell enlargement and this, in turn, improves plant growth (Khan et al 2011).…”

“…Among the positive effects of AsA in the counteraction of the adverse effects of salt stress are the stabilization and protection of the photosynthetic pigments and the photosynthetic apparatus from oxidization (Khan et al 2011). Ascorbic acid can mitigate the adverse effects of salinity through increasing the content of IAA and GA 3 and decreasing ABA level (Khan et al 2011), which may be involved in protecting the photosynthetic apparatus and consequently increasing the photosynthetic pigments.…”

“…AsA regulates stress response as a result of a complex sequence of biochemical reactions such as activation or suppression of key enzymatic reactions, induction of stress responsive proteins synthesis, and the production of various chemical defense compounds (Khan et al 2011). The protective role of AsA in plant cells from the adverse effects of salt stress was described by Athar et al (2009) and Younis et al (2010).…”

Exogenous Application of Ascorbic Acid Ameliorates Detrimental Effects of Salt Stress in Rice (MRQ74 and MR269) Seedlings

“…These effects could be attributed to the effect of exogenous ascorbic acid on various physiological processes, including the organization of growth, metabolism and differentiation of plants under NaCl stress and increasing physiological availability of nutrients and water (Barakat, 2003). Ascorbic acid currently holds a significant position in plant physiology, mainly due to its possession of cellular reductant and antioxidant properties and its diverse functions in plant development and growth and in the regulation of a broad spectrum of plant cellular mechanisms against salt stresses (Khan et al, 2011). Additionally, ascorbic acid protects metabolic processes against H 2 O 2 and toxic derivatives of oxygen which affect various enzyme activities and decreases the damage caused through oxidative processes by functioning in synergy with other stabilizing membranes and antioxidants (Pourcel et al, 2007;Shao et al, 2008).…”

Ameliorative Effect of Proline and Ascorbic Acid on Seed Germination and Vigour Parameters of Tomato (Solanum lycopersicum L.) Under Salt Stress

“…Ascorbic acid decreases adverse effects of salt stress on plant growth. Ascorbic acid play major role in stress by regulating complex sequence of biochemical reactions, induction of stress responsive protein synthesis, and the producing of various chemical defense compounds (Khan et al, 2011).…”