Alterations in leaf cellular ultra-structure of three varieties of Lolium perenne subjected to high temperature and soil drought stress

Abstract

Abstract: Changes of leaf cellular ultra-structure in response to high temperature and drought stress in three varieties (Accent, Bartwingo and Fairway) of Lolium perenne were investigated. Under high temperature stress of 35℃ chloroplasts swelled, became round and moved centrally. There was some plastoglobulis within the chloroplasts. The chloroplasts of Fairway under drought stress from 25% PEG-6000 solution were badly damaged. Their grana and envelope disrupted and the lamella swelled, split, and even dissolved and disappeared. The morphological variation of the mitochondrion was not distinct and their number increased under high temperature and soil drought stress. Compared with chloroplasts, the mitochondrial tolerance and resistance to high temperature and drought stress were strong. Accent’s tolerance and resistance to high temperature and drought stress were stronger than those of Fairway and Bartwingo, but were not significant.

CLC Number:

WAN Li-qiang, SHI Yong-hong, LI Xiang-lin, HE Feng, JIA Ya-xiong. Alterations in leaf cellular ultra-structure of three varieties of Lolium perenne subjected to high temperature and soil drought stress[J]. Acta Prataculturae Sinica, 2009, 18(1): 25-31.

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