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当前位置: 首页 > 文章 > 真盐生植物梭梭和囊果碱蓬幼苗耐干旱能力的研究 草业学报 2015,24 (11) 240-246
Position: Home > Articles > Study of resistance to dehydration in Haloxylon ammodendron and Suaeda physophora seedlings Acta Prataculturae Sinica 2015,24 (11) 240-246

真盐生植物梭梭和囊果碱蓬幼苗耐干旱能力的研究

作  者：
丁效东;张士荣;刘阳超;冯固
单  位：
青岛农业大学资源与环境学院;中国农业大学资源与环境学院
关键词：
梭梭;囊果碱蓬;白梭梭;耐干旱脱水;存活率
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1~2cm白梭梭幼苗经过7,14,21和28d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28d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28d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;300mmol/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。
译  名：
Study of resistance to dehydration in Haloxylon ammodendron and Suaeda physophora seedlings
作  者：
DING Xiao-Dong;ZHANG Shi-Rong;LIU Yang-Chao;FENG Gu;College of Resources and Environment,Qingdao Agricultural University;College of Resources and Environment,China Agricultural University;
关键词：
Haloxylon ammodendron;;Suaeda physophora;;psammophyte Haloxylon persicum;;desiccation-tolerant;;survival rate
摘  要：
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.persicumamong the 7,14,21 and 28days desiccation treatments,however,the survival rates of H.ammodendronand S.physophorahas 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 300mmol/L NaCl treatment,the root tip of the H.ammodendronseedlings were all bended and died.It was showed that H.persicum,H.ammodendronand 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.

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