Study on the Cold Resistance of Miscanthus Andersson in China

doi:10.11733/j.issn.1007-0435.2014.04.019

Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (4): 803-807.DOI: 10.11733/j.issn.1007-0435.2014.04.019

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Study on the Cold Resistance of Miscanthus Andersson in China

DU Xi-yi¹, XIAO Liang², JIANG Jian-xiong¹, YI Zi-li¹, CHEN Zhi-yong¹, HUANG Hong-mei¹, QIN Jing-ping¹, LIU Qing-bo¹

1. College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan Province 410128, China;
2. Key Laboratory of Group Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, Hunan Province 410128, China

Received:2013-10-03 Revised:2013-12-02 Online:2014-08-15 Published:2014-08-04

中国芒属植物抗寒性初步研究

杜希夷¹, 肖亮², 蒋建雄¹, 易自力¹, 陈智勇¹, 黄红梅¹, 覃静萍¹, 刘清波¹

1. 湖南农业大学生物科学技术学院, 湖南长沙 410128;
2. 湖南农业大学作物种质和资源利用国家重点实验室培育基地, 湖南长沙 410128

通讯作者: 易自力
作者简介:杜希夷（1986-），女，湖南永州人，硕士研究生，主要从事芒属植物抗寒机理研究，E-mail：251402642@qq.com
基金资助:
湖南省自然科学基金（12JJ2019）；国家科技支撑计划（2013BAD22B02）资助

Abstract

Abstract:

The leaves of thirteen Miscanthus Andersson accessions were taken as tested materials to study the cold resistances of them by the means of electrical conductivity method. Seven temperature gradients (5, 0,-5,-10,-15,-20,-25℃) were designed as freezing stresses. The line regressive relationships of LT₅₀ with latitude and altitude were analyzed. The results showed that the variation range of LT₅₀ was-2.92～-23.85 ℃, The cold resistance of tested samples ranked as C0429(-23.85℃) >D0341(-14.10℃) >B0534(-9.60℃) >B0121(-6.97℃) >A0502(-6.77℃) >A0110(-6.51℃) >B0120(-6.34℃) >B0605(-5.39℃) >A0107(-5.00℃) >C0517(-4.27℃) >B1045(-3.26℃) >C0128(-3.08℃) >C0129(-2.92℃). Regression analyses indicated that there were significant relationships between LT₅₀ and latitude or altitude. These results provide a theoretical basis for the cold resistance screening of Miscanthus germplasm resource in China.

Key words: Miscanthus, Cold resistance, Electrical conductivity, Logistic equation

摘要：

以13份具有地理代表性的芒属（Miscanthus Andersson）植物为材料，分别以5，0，-5，-10，-15，-20和-25℃共7个温度梯度进行冷冻胁迫，通过电导法测定电解质外渗率来评价各材料的抗寒性，并对供试材料半致死温度（LT₅₀）与其原产地地理因子进行回归分析。结果表明：半致死温度（LT₅₀）的变化范围为-2.92～-23.85℃，抗寒性由强到弱依次为C0429（-23.85℃） >D0341（-14.10℃） >B0534（-9.60℃） >B0121（-6.97℃） >A0502（-6.77℃） >A0110（-6.51℃） >B0120（-6.34℃） >B0605（-5.39℃） >A0107（-5.00℃） >C0517（-4.27℃） >B0145（-3.26℃） >C0128（-3.08℃） >C0129（-2.92℃），回归分析表明，半致死温度（LT₅₀）与纬度和海拔成极显著负相关，说明芒属植物抗寒性与地理因子具有一定的相关性。研究结果将为芒属植物抗寒种质资源的筛选提供理论基础。

关键词: 芒属, 抗寒性, 电导率, Logistic方程

CLC Number:

Q945.78

DU Xi-yi, XIAO Liang, JIANG Jian-xiong, YI Zi-li, CHEN Zhi-yong, HUANG Hong-mei, QIN Jing-ping, LIU Qing-bo. Study on the Cold Resistance of Miscanthus Andersson in China[J]. Acta Agrestia Sinica, 2014, 22(4): 803-807.

杜希夷, 肖亮, 蒋建雄, 易自力, 陈智勇, 黄红梅, 覃静萍, 刘清波. 中国芒属植物抗寒性初步研究[J]. 草地学报, 2014, 22(4): 803-807.

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Study on the Cold Resistance of Miscanthus Andersson in China

中国芒属植物抗寒性初步研究

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