Enhancement Effect of Gibberellic Acid and Kinetin on Sucrose Metabolism in Mungbean Seedlings Under Arsenate Toxicity
Arsenic pollution is at present an emerging global crisis. Arsenic is a naturally occurring metalloid found in water, soil and air from natural and anthropogenic sources. Currently, Arsenic pollution has gained a burning global importance due to its toxic effects. Growth of major pulse crop Mungbean (Vigna radiata (L.)Wilczek) was affected right from seedling stage when treated with Sodium arsenate (Na2HAsO4.7H2O). With the increase in concentration of Sodium arsenate (5μM, 10μM and 20μM) significant decrease in seedling length, water content and primary leaf area was observed. The vital pigments like chlorophyll, caroteniod content as well as Hill activity reduced appreciably in sodium arsenate treated seedlings which indicates poor photosynthetic metabolism. Arsenate exposure also altered metabolism of main photosynthate, sucrose. Arsenate toxicity led to decrease in reducing and non reducing sugar content in the mungbean seedlings whereas starch content was elevated. Pretreatment of mungbean seeds with Phytohormone-GA3 and Kinetin could ameliorate Arsenate induced toxicity to different extent in terms of growth and sucrose metabolism. Thus, the use of GA3 and Kinetin may help to resist the arsenic toxicity in seedling stage, to some extent, in arsenic contaminated areas.
Enhancement Effect of Gibberellic Acid and Kinetin on Sucrose Metabolism in Mungbean Seedlings Under Arsenate Toxicity, American Journal of Bioscience and Bioengineering.
Vol. 5, No. 1,
2017, pp. 50-55.
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