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|本期目录/Table of Contents|

 干旱胁迫下紫穗槐叶片解剖特征的变化()

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年03期
页码:
332-337
栏目:
系统与演化植物学
出版日期:
2011-08-01

文章信息/Info

Title:
 Changes on the anatomical characteristics of Amorpha fruticosa leaves under different drought stress gradient
作者:
 崔大练 马玉心 王俊
 浙江海洋学院 海洋科学学院, 浙江 舟山 316000
Author(s):
 CUI Da-Lian MA Yu-Xin WANG Jun
 College of Marine Science, Zhejiang Ocean University, Zhoushan 316000, China
关键词:
 紫穗槐 叶片 形态解剖特征 干早胁迫 生态适应性
Keywords:
 Amorpha fruticosa leaf anatomical characteristics drought stress ecological adaptation
分类号:
-
DOI:
-
文献标识码:
A
摘要:
 研究了重度、中度、轻度干旱胁迫条件下2年生紫穗槐幼苗叶片的形态解剖学特征变化。结果表明:随着干旱胁迫程度的增加,叶片厚度、上下表皮的厚度逐渐减小,栅栏组织和海绵组织的厚度也减小,而栅栏组织与海绵组织的比值、主脉维管束相对直径、主脉突起度与中脉厚度则增大。气孔面积随干旱程度的增加呈下降趋势,但气孔分布的密度增加。在干旱逆境胁迫条件下,紫穗槐通过改变叶片外部形态、内部解剖构造和生理功能来适应干旱环境。
Abstract:
Amorpha fruiticosa is a soil conservation species. The research aimed to investigate the changes in morphological and anatomical characteristics of twoyear seedling leaves of A.fruticosa under the different drought stress gradient:light stress(LS),medium stress(MS)and severe stress(SS). The results showed that the thickness of blade and the upper and lower epidermis were gradually decreased with the increase of drought stress gradient. Thickness of palisade tissue and spongy parenchyma were also decreased,while,the ratio of palisade tissue to spongy parenchyma,the relative diameter of the vascular bundle in main vein,the protruding degree of main vein and midrib thickness were increased. The stoma area was a downtrend but its density was increased. Furthermore,with the drought stress increased,the leaf size was decreased and its shape was changed. These results indicated that A.fruticosa could change the morphological and anatomical structure of its leaves to adapt the drought stress.

参考文献/References

备注/Memo

备注/Memo:
更新日期/Last Update: 2011-07-01