| Effect of drought stress on root morphology and yield of pea |
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| DOI：10.7606/j.issn.1000-7601.2017.03.23 |
| Key Words: pea drought stress root morphology dry matter yield |
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| Abstract: |
| Pot experiments were conducted to study the effect of drought stress (55% relative water content for 15 days) on dry matter accumulation, root system growth and yield of pea, with three treatments for timing at branching stage, budding stage and early flowering stage. The results showed that dry matter accumulation under three drought treatments was significantly reduced compared with that under the normal water supply (75%) during the whole growth stages. Besides, root growth was also significantly inhibited by drought stress, and the inhibition caused by stress at branching stage had hysteresis effect. Positive effect of re-watering on root growth was detected for drought stress at budding stage. Furthermore, all the three drought treatments inhibited the formation and growth of root nodules, and the compensation was inadequate after re-watering. In addition, the inhibition effect of stress at early flowering period on pea yield was the largest, with a reduction of 20.41% in comparison with that of CK, followed by budding stage (6.63% reduction), while that at branching stage was not significant. |
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