摘要
通过对沙冬青抗旱机理的探讨 ,经数理统计分析 ,初步认为沙冬青具有很低的水势和蒸腾强度 ,而束缚水含量很高 ,说明沙冬青原生质细胞具抗旱特点。叶片具有厚的角质层 ,浓密的表皮毛 ,气孔下陷 ,叶肉全部为栅栏组织 ,具抗旱结构。沙冬青不但具有较发达的根系 ,水势低 ,吸水能力很强 ,而且从叶到茎都具有抑制蒸腾失水的旱生结构。可见沙冬青是以尽可能多地吸收水分并减少蒸腾失水的方式来调节体内水分平衡 。
The protogonocytes of\% Ammopitanghus mongolicus \%(Maxim) Cheng F have drought resisting characters: low water potential and transpiration, but hight binding water content. The plant has xerophytic struture for restraining transpiration: thick cuticula, concetrated down, depressed stoma, wholly palisade tissue of leaf fresh; it has also developed roots, thus strengthened water absorbing force. Therefore, \%A. mongolicus\% adjusts the water balance in her body depend on absorbing as much water as she can and decreasing water loss from traspiration for adapting arid environment.
出处
《中国沙漠》
CSCD
北大核心
2000年第1期71-74,共4页
Journal of Desert Research
关键词
沙冬青
抗旱机能
荒漠植被
豆科植物
Ammopitanthus mongolicus\% (Maxim) Cheng F
drought resisting mechanism
