结缕草的抗寒性与体内碳水化合物、脯氨酸、可溶性蛋白季节动态变化的关系

摘要/Abstract

摘要： 为了阐述结缕草抗寒性与碳水化合物、脯氨酸含量及可溶性蛋白含量季节动态变化的关系,在2008年10月-2009年5月期间,以‘兰引3号’结缕草(Zoysia japonica ‘Lanyin No.3’)为材料,研究在自然温度变化过程中,‘兰引3号’结缕草地下根茎碳水化合物、脯氨酸含量、可溶性蛋白含量的季节性动态变化及其与LT₅₀变化的关系。结果表明,在越冬前后,‘兰引3号’结缕草地下根茎LT₅₀呈先降低后升高的季节变化趋势,可溶性总糖含量、蔗糖含量、果糖含量及可溶性总糖/淀粉、脯氨酸含量、可溶性蛋白含量伴随田间气温变化均呈先升高后又降低的趋势,淀粉含量则呈先降低后又升高的趋势;‘兰引3号’结缕草地下根茎LT₅₀季节变化与可溶性总糖含量、果糖含量、可溶性总糖/淀粉、可溶性蛋白含量季节变化之间显著负相关,而与蔗糖含量、淀粉含量、脯氨酸含量的季节变化间不存在显著的相关性。

Abstract: To clarify the changes of carbohydrates, proline, soluble protein contents and their relationships to freezing tolerance of Zoysia japonica ‘Lanyin No.3’, the relationship of carbohydrate (total soluble sugars, sucrose, glucose, starch), proline and soluble protein concentrations with LT₅₀(the lethal temperature killing 50% of the plants) of rhizomes were studied at monthy intervals from October, 2008 to May, 2009 under natural cold conditions. The contents of carbohydrates, proline, soluble protein and LT₅₀ showed a clear seasonal trend in rhizomes of Z. japonica ‘Lanyin No.3’ and they increased or decreased sharply as temperatures dropped in overwintering and decreased or increased gradually along with the rise in temperature in spring. Correlation analysis revealed that the freezing tolerance of rhizomes of Z. japonica ‘Lanyin No.3’ positively correlated with the contents of total soluble sugars, glucose and the ratio of the soluble sugars to starch but had no positive correlation with the contents of sucrose, starch, and proline.

中图分类号:

王丹,宣继萍,郭海林,刘建秀. 结缕草的抗寒性与体内碳水化合物、脯氨酸、可溶性蛋白季节动态变化的关系[J]. 草业学报, 2011, 20(4): 98-107.

WANG Dan, XUAN Ji-ping, GUO Hai-lin, LIU Jian-xiu. Seasonal changes of freezing tolerance and its relationship to the contents of carbohydrates, proline, and soluble protein of Zoysia[J]. Acta Prataculturae Sinica, 2011, 20(4): 98-107.

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