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Position: Home > Articles > Anatomical Structure Comparison Between Leaves of Two Winter Wheat Cultivars with Different Cold/Freezing Tolerance Under Low Temperature Stress Journal of Northeast Agricultural University(English Edition) 2011,18 (3)

Anatomical Structure Comparison Between Leaves of Two Winter Wheat Cultivars with Different Cold/Freezing Tolerance Under Low Temperature Stress

作者：

Jun Yu;Jing Cang;Zishan Zhou;Lijie Li

单位：

College of Life Sciences Northeast Agricultural University Harbin 150030 China; College of Life Sciences, Northeast Agricultural University, Harbin, 150030, Chin;College of Communication and Electronic Engineering, Qiqihar University, Qiqihar 161006, Heilongjiang, China

关键词：

leaves;cold;jimai 22;cultivars;dongnongdongmai 1;freezing toleranc

摘要：

Abstract Winter wheat ( Triticum aestivum ) cultivars Dongnongdongmai 1 with strong cold/freezing tolerance and Jimai 22 with weak cold/freezing tolerance were used for investigating the difference of microstructure and ultrastructure between leaves of two cultivars under low temperature stress (5°C and −15°C) using optical and electron microscope. The results showed that there was no obvious difference between leaves of Dongnongdongmai 1 and Jimai 22 in microstructure. However, the difference between those leaves was distinct in ultrastructure. The grana lamella and stroma lamella were stacked regularly and arranged parallelly along the long axis of chloroplasts in cv. Dongnongdongmai 1, while the arrangement directions of thylakoids in Jimai 22's leaves were so irregular as to form various angles with the long axis of chloroplasts. At −15°C, the mitochondrias were swelled to be round and the structure of cristaes became blurry in both cultivars' leaves, while some cristaes of Jimai 22 disappeared. These results would provide theoretical evidence for selecting cold/freezing tolerant winter wheat germplasm resources.

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Anatomical Structure Comparison Between Leaves of Two Winter Wheat Cultivars with Different Cold/Freezing Tolerance Under Low Temperature Stress

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