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当前位置: 首页 > 文章 > 绒毛白蜡对NaCl胁迫的生理响应 北方园艺 2016 (10) 70-75
Position: Home > Articles > Physiological Response of Fraxinus velutinato NaCl Stress Northern Horticulture 2016 (10) 70-75

绒毛白蜡对NaCl胁迫的生理响应

作  者：
刘海曼;封晓辉;刘毅;张秀梅;王玉珍;刘小京
单  位：
南大港管理区农科所;中国科学院遗传与发育生物学研究所农业资源研究中心
关键词：
盐渍化;绒毛白蜡;NaCl胁迫
摘  要：
以新品系耐盐优株绒毛白蜡(Fraxinus velutina)和普通绒毛白蜡为试材,在盆栽条件下用质量浓度为0、1、2、3、4、5、6、7g·kg-1的NaCl溶液进行胁迫处理,测定了胁迫后根、茎、叶中Na+、K+含量以及生物量、光合指标、可溶性糖等生理指标,探讨白蜡在NaCl胁迫下的生理响应。结果表明:所选育的新品系白蜡比普通绒毛白蜡耐盐性更强;耐盐机制以聚盐和增加植株内可溶性糖含量为主。耐盐优株白蜡耐盐阈值为5g·kg-1,较普通白蜡高1g·kg-1,随着进一步的选育,绒毛白蜡可作为环渤海盐碱地区绿化的优良树种。耐盐优株白蜡对Na+吸收随NaCl浓度增加而增加,在各器官积累量随浓度增加有相应变化,在1~3g·kg-1处理中为根>茎>叶,4g·kg-1及以上处理中为叶>茎>根。Na+在耐盐优株白蜡体内总积累量高于普通白蜡,低盐浓度在根部聚集,高盐浓度在叶中聚集,聚盐作用显著。耐盐优株白蜡在盐胁迫条件下,植株内可溶性糖含量显著高于普通白蜡,并随NaCl浓度升高显著增加。
译  名：
Physiological Response of Fraxinus velutinato NaCl Stress
作  者：
LIU Haiman;FENG Xiaohui;LIU Yi;ZHANG Xiumei;WANG Yuzhen;LIU Xiaojing;Institute of Genetics and Developmental Biology Center of Agricultural Resources Research,Chinese Academy of Sciences,Key Laboratory of Agricultural Water Resources;University of Chinese Academy of Sciences;Agricultural Research Institute of Nandagang Management District;
关键词：
salinization;;Fraxinus velutina;;NaCl stress
摘  要：
Taking new strain salt tolerance Fraxinus velutinaand normal F.velutinaas experimental materials,pot culture were conducted to investigate the Na+,K+,biomass and water content changes of F.velutina,which were irrigated with NaCl stress concentration of 0g·kg-1,1g·kg-1,2g·kg-1,3g·kg-1,4g·kg-1,5g·kg-1,6g·kg-1,7g·kg-1 mass concentration.The results showed that the selected new strain F.velutina's salt-tolerance ability was better than the normal F.velutina;the main mechanism of salt tolerance was polysalt and increasing soluble sugar content.The salt tolerance F.velutinathreshold was5g·kg-1,1g·kg-1 higher than ordinary F.velutina.Along with further breeding,F.velutina could be used as a good greening tree species of the Bohai Sea salt-affected area.With salt stress concentration increased,Na+absorption of salt tolerance F.velutinaincreased,the fundamental order of accumulation in various organs changed with the salt stress concentration.In1-3g·kg-1,the order was root>stem>leaf;above 4g·kg-1,the order was leaf>stem>root.The total accumulation of Na+in salt tolerance F.velutina was higher than normal F.velutina,when in low salt stress situation,Na+accumulate in root,accumulate in leaves in high salt stress situation,polysalt significantly.Under high-salt circumstance,the content of soluble sugar in salt tolerance F.velutinahigher than the normal F.velutina,and increased with the increase of salt stress.

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