THE EFFECT OF DROUGHT ON PHYSIOLOGICAL AND BIOCHEMICAL CHARACTERISTICS OF | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 17, Issue 1, December 2012, Pages 0-0 | ||
| Authors | ||
| K.M. Ibrahim; S.A. Yousif; A.K. Aurabi | ||
| Abstract | ||
| Seeds of four rice genotypes Amber 33, Amber Baghdad, T14 and T15 were inoculated into half strength MS medium supplemented with 0.0, 10 or 20% polyethylene glycol 6000 (PEG). The effect of polyethylen glycol % (PEG) was examined on Shoot, root lengths, plant fresh, dry weights, proline and carbohydrate concentrations. The results showed that there were differences between genotypes; genotype T15 produced the highest mean plant fresh, dry weight and proline content, with mean values 108.612mg, 11.270mg and 53.387mg/g dry, respectively. While genotype T14 exhibited the highest carbohydrate content compared with other genotypes. The PEG caused decreasing in means of all characters studied with increasing PEG concentrations, except the means of proline content. The interaction between genotypes and PEG concentrations had a significant effect on all the measured traits except plant dry weight. Due to the importance of rice especially Amber genotypes in Iraq, its important to improve these drought sensitive genotypes (Amber33 and Amber Baghdad) for drought tolerance using different genetic engineering and tissue culture techniques. Also T14 and T15 genotypes can be used as stander genotypes for drought tolerance. Key words: Rice, drought tolerance, PEG | ||
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