【摘要】 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。更多还原

【Abstract】 Object of this study is to identify types of pubescence and anatomy of stem adapted to drought in different empharmone of drought resistant soybeans. Studies indicated that adaptability of drought resistance is higer on soybean with dense pubesoence than that of soybean with sparse pubescence. Under condition of water stress soybean of drought resistant is different from soybean of susceptable type on digree of inflation of bell-jar pubscence base. Digree of inflation bell-jar pubescence base of soybean of drought resistant type is greater than that of susceptable soybean. During water stress soybean of susceptable type give rise of new pubescence. These characters are reponsec of soybean for adaptation to drought.The study poited out that ratio between cortex and centyal cylinder of stem of soybean of drought resistant type is higher than that of susceptable soybean. The xylem of soybean of drought resistant type is more than that of soybean of susceptable type, and the vascalar boundle arrangement is closer.The pith in stem of soybean of drought resistant type is smaller than that of soybean of susceptable type. The pith cell of soybean of resistant drought type is like spongy.更多还原