Athar, Habib-ur-Rehman .
Using some potential osmoprotectants and antioxidants for improving plant growth under saline conditions: Achievements and limitations.
Of various abiotic stresses, salinity is one of major constraints for agricultural production world-wide. To acclimatize salt stress, plants generally accumulate various organic compatible solutes such as proline, glycinebetaine, trehalose or up-regulate antioxidant system. Furthermore, it has been found that salt tolerant cultivars accumulate more these osmoprotectants more than those in salt sensitive cultivars. Likewise, salt tolerant cultivars have more efficient antioxidant system compared with that of salt sensitive cultivars. Thus, plant breeders also have suggested to breed crops for salt tolerance using these osmoprotectants or antioxidants as potential selection criteria. However, breeding for salt tolerance is a long way to improve crop salt tolerance. Secondly, the low efficiency of this approach is due principally to the difficulty of recovering elite genotypes with salt tolerance traits, the genetic complexity of salt tolerance, and environmental interactions. Alternatively, exogenous application of these osmoprotectants and antioxidants as a foliar spray or through seed soaking is one of the possible suggested means to induce salt tolerance. In the present review, a comparative effect of exogenous applications of osmoprotectants and antioxidants in inducing salt tolerance particularly in wheat has been discussed. In addition, how exogenously applied osmoprotectants and antioxidants affect various biochemical and physiological processes that result in improved salt tolerance is also discussed. In view of the reports available in the literature, major limitations to use it on large scale are also thrashed out for future implications.
Log in to add this item to your schedule
stress tolerance, crop improvement, glycinebetaine, proline
1 - Bahauddin Zakariya University, Institute of pure and Applied Biology, Habib-ur-Rehman Athar, Assistant Professor in Botany,, Inst Pure Appl Biol, Bahauddin Zakariya University, Multan, 60800, Pakistan
Presentation Type: Oral Paper:Papers for Topics
Date: Wednesday, July 30th, 2008
Time: 2:30 PM