Ascorbate and Drought Stress Effects on Germination and Seedling Growth of Sorghum

Reiahi, N. and Farahbakhsh, H. (2013) Ascorbate and Drought Stress Effects on Germination and Seedling Growth of Sorghum. International journal of Agronomy and Plant Production, 4 (5). pp. 901-910.

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Abstract

Drought stress is the most important limiting factor for crop production and it is becoming a growing problem in many regions of the world. To investigate the effect of ascorbic acid on germination of sorghum (Sorghum bicolor) under drought stress a factorial experiment based on completely randomized design with three replications was accomplished at the laboratory of agriculture faculty, Shahid Bahonar University of Kerman, Iran. The seeds were pretreated with H2O (control) and different concentrations of ascorbic acid (0.5, 1 and 1.5 mM) before germination for 24 h. The primed seeds were germinated under drought stress conditions (0, -2, -4 and -6 bar) induced by different amounts of PEG6000. Germination percentage, germination rate, seed stamina index, hypocotyl length, radicle length, hypocotyl and radicle fresh weight, hypocotyl and radicle dry weight, relative water content as germination characteristics were measured after imposing drought stress for 7 days. Drought, salicylic acid and their interaction affected the measured traits significantly. The means of all traits decreased with increasing drought stress. The effect of 1 and 1.5 mM ascorbic acid was more pronounce than the other level in alleviating damages resulted from drought stress on sorghum seedlings. It seems that ascorbic acid is able to enhance the tolerant ability of the plant to drought stress.

Item Type: Article
Additional Information: Ascorbic Acid, Drought Stress, Germination, Sorghum bicolor
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 02 May 2013 04:06
Last Modified: 02 May 2013 04:06
URI: http://eprints.icrisat.ac.in/id/eprint/10451

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