摘要
为了探究胡杨应对干旱的适应机制,本研究从宏观方面对叶片形态和面积进行观察,到微观角度对栅栏组织细胞、气孔分布等进行观察,对比分析胡杨过渡类型叶片(胡杨披针形叶片、胡杨阔卵形叶片)和加拿大杨阔卵形叶片的差异性。结果表明,胡杨冠层叶片叶形种类多、表面蜡质皮质层厚、气孔稀疏且下陷、叶脉密度大、碳含量高等特点为胡杨在干旱条件下生存提供了生理基础;同时,确定了维持胡杨节流储水功能的内部和外部形态结构特点,揭示了胡杨应对干旱的适应机制。
In order to explore the response mechanisms of Populus euphratica to drought,this study observed the leaf morphology and area from the macro perspective,and observed the palisade tissue cells,stomatal distribution and so on from the micro perspective,compared and analyzed the differences between transition type leaves of Populus euphratica(lanceolate leaves and broadly ovate leaves of Populus euphratica)and broadly ovate leaves of Canadian poplar.The results showed that the characteristics of Populus euphratica,such as multiple leaf forms,thick waxy cortex layer,sparse stomata and subsidence,large leaf vein density and high carbon content,provided physiological basis for Populus euphratica to survive under drought conditions.At the same time,the study determined the characteristics of internal and external morphological structure that maintained the function of water storage and throttling,and revealed the mechanism of adaptation to drought.
作者
熊远猇
万宇轩
马丽霞
XIONG Yuan-xiao;WAN Yu-xuan;MA Li-xia(Beijing No.101 Middle School,Beijing 100091)
出处
《现代农业科技》
2020年第14期110-112,共3页
Modern Agricultural Science and Technology
关键词
胡杨
叶片形态
微观特征
抗旱机制
Populus euphratica
leaf morphology
microscopic characteristic
drought resistance mechanism
