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本研究在人工模拟旱境生长室内进行。于鼓粒初期,对抗旱型大豆品种“呼80—1001”,“安丰1”和敏感型品种“绥农4”及中间型品种“黑农26”进行干旱处理。应用扫描电子显微镜(S—430)对茸毛的适旱变态和茎横剖面结构进行观察。研究结果指出密集茸毛型大豆较稀疏茸毛型大豆具有较强的抗旱能力。在水分胁迫条件下,钟状茸毛基部的膨润度和新茸毛增生乃为适旱变态反应。研究结果还指出抗旱型大豆的皮层与中柱的比率大于敏感型大豆。维营束排列较紧密,束内系列导管抗旱型大豆也多于敏感型大豆。中央系列导管的最大导管直径抗旱型大于敏感型,抗旱型大豆茎具有较小的髓,其细胞呈海绵状。
The study was conducted in a simulated dry-land growth chamber. In the initial stage of drumming, the drought-tolerant soybean varieties “Hu 80-1001”, “Anfeng 1” and the sensitive variety “Suinong 4” and the intermediate variety “Heinong 26” were treated with drought. Morphological adaptability and cross-sectional structure of hairs were observed by scanning electron microscopy (S-430). The results indicate that the dense hairy soybean has more drought resistance than the thinned hairy soybean. Under water stress conditions, the swelling of the base of the bell-shaped hairy hairs and the proliferation of new hairy hairs are suitable for drought-induced allergic reactions. The results also point out that drought-tolerant soybean has a larger cortex-central ratio than sensitive soybeans. Victoria camp arranged more closely, beam within the series of drought-tolerant soybeans are also more than sensitive soybeans. The maximum catheter diameter of the central series was greater than that of the drought-sensitive ones. The drought-resistant soybean stems had smaller pith and their cells were spongy.