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作 者 ：杨玲;王韶唐

期 刊 ：作物学报 1999年 25卷 01期 页码：86-91

关键词：大豆；高度避日态；近轴和远轴叶面；木质部水势；叶温；净光合速率；水分胁迫；

Keywords:Soybean, leaf surface, Xylem water potential, Leaf let temperature, Net photosyn-thetic rate, Advanced parahelitropisn, Water stress,

摘 要 ：大豆远轴叶面具有高密度的茸毛和气孔及大量连片状蜡质。小叶两而气孔对水分亏缺和光强变化的反应有差异。严重水分胁迫下，大豆末端小叶在中午呈高度避日态—对缺水不敏感、对强光敏感的远轴叶面气孔向光，除增大反射显著降低叶温外，还遮盖了一侧生小叶，极显著减缓了三出复叶木质部水势的下降，并且维持了较高的叶片净光合

Abstract:The abaxial epidermis had high pubescence density and great stomata frequency and a waxy bloom. The responses of adaxial and abaxial stomata to water status and light intensity were different. The complete inverted (advanced arahelitropism)terminal leaflets at midday un- der severe water stress，w

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