真盐生植物梭梭和囊果碱蓬幼苗耐干旱能力的研究

doi:10.11686/cyxb2014542

草业学报 ›› 2015, Vol. 24 ›› Issue (11): 240-246.DOI: 10.11686/cyxb2014542

真盐生植物梭梭和囊果碱蓬幼苗耐干旱能力的研究

丁效东^{1, 2}, 张士荣¹, 刘阳超², 冯固^{2, *}

1.青岛农业大学资源与环境学院, 山东青岛266109; 2.中国农业大学资源与环境学院, 北京 100193

收稿日期:2014-12-26 出版日期:2015-11-20 发布日期:2015-11-20
通讯作者: E-mail:fenggu@cau.edu.cn
作者简介:丁效东(1978-),男,山东寿光人,副教授,博士。
基金资助:
国家基础研究计划(2014CB954202)和公益性行业(农业)科研专项(201103007)资助

Study of resistance to dehydration in Haloxylon ammodendron and Suaeda physophora seedlings

DING Xiao-Dong^{1, 2}, ZHANG Shi-Rong¹, LIU Yang-Chao², FENG Gu^{2, *}

1.College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China; 2.College of Resources and Environment, China Agricultural University, Beijing 100193, China

Received:2014-12-26 Online:2015-11-20 Published:2015-11-20

摘要/Abstract

摘要： 本文以沙生植物白梭梭幼苗为对照,研究了盐生植物梭梭和囊果碱蓬幼苗的耐干旱脱水能力,通过比较干旱时间对三者幼苗干旱后存活率的影响,评价其耐脱水能力,并对复水后根部细胞的受损情况进行了研究。结果表明:根长为 12 cm白梭梭幼苗经过7,14,21和28 d干旱后,存活率没有显著性差异,但是梭梭和囊果碱蓬随着干旱时间的延长,存活率发生显著性地降低,囊果碱蓬幼苗干旱28 d后全部死亡并发生降解;白梭梭幼苗的耐干旱能力比较强,干旱28 d后复水根部死亡细胞和受伤的细胞比较少,而梭梭死亡和受损程度明显比白梭梭高;300 mmol /L NaCl溶液处理,梭梭的根尖发生弯曲,根尖大部分死亡。研究表明,白梭梭、梭梭和囊果碱蓬属于“同型叶绿素型”植物,在光照下干旱叶绿体不会被降解,其幼苗在干旱和复水过程中能够适应干旱环境。

Abstract: The previous research has been concentrated on the dehydration resistance of the seedlings in the two halophytes: Haloxylon ammodendron and Suaeda physophora. Comparing with the psammophyte Haloxylon persicum, both the seedling survival rate and the root damage after the desiccation were investigated, the results showed that: No significant difference was found in the survival rates of H. persicum among the 7, 14, 21 and 28 days desiccation treatments, however, the survival rates of H. ammodendron and S. physophora has been significantly decreased with the desiccated duration, in which the seedlings of S. physophora were all died in the 28 days desiccation treatment. The seedling root of H. persicum was rarely damaged by the 28 days desiccation treatments, which was better than that in H. ammodendron, in the 300 mmol/L NaCl treatment, the root tip of the H. ammodendron seedlings were all bended and died. It was showed that H. persicum, H. ammodendron and S. physophora were all “homoiochlorophyllous” resurrection plants, they would not degrade their chlorophyll during the desiccation time, and could survive fast when the water supplied again, which was an important adapt strategy to the extremely drought environment.

丁效东, 张士荣, 刘阳超, 冯固. 真盐生植物梭梭和囊果碱蓬幼苗耐干旱能力的研究[J]. 草业学报, 2015, 24(11): 240-246.

DING Xiao-Dong, ZHANG Shi-Rong, LIU Yang-Chao, FENG Gu. Study of resistance to dehydration in Haloxylon ammodendron and Suaeda physophora seedlings[J]. Acta Prataculturae Sinica, 2015, 24(11): 240-246.

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真盐生植物梭梭和囊果碱蓬幼苗耐干旱能力的研究

Study of resistance to dehydration in Haloxylon ammodendron and Suaeda physophora seedlings

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