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当前位置: 首页 > 文章 > 不同盐分水平对中国柽柳和甘蒙柽柳根系生长及生理特性的影响 生态学杂志 2017 (10) 2759-2767
Position: Home > Articles > Effects of different salinity levels on the growth and physiological characteristics of roots of Tamarix chinensis and T. austromongolica Chinese Journal of Ecology 2017 (10) 2759-2767

不同盐分水平对中国柽柳和甘蒙柽柳根系生长及生理特性的影响

作  者：
宋香静;李胜男;韦玮;郭嘉;于一雷;刘志伟
单  位：
中国林业科学研究院湿地研究所湿地生态功能与恢复北京市重点实验室
关键词：
中国柽柳;甘蒙柽柳;根系;盐分;影响
摘  要：
柽柳作为黄河三角洲湿地的重要优势种,对盐渍化环境具有较好的适应性。根系作为植物直接感受盐分变化的器官,研究其生理生态特性对盐分条件的响应,对植物生存、土壤改良及植被恢复等具有重要意义。以一年生中国柽柳和甘蒙柽柳插穗为研究材料,采用水培法,设置6个盐分水平:CK(空白对照)、0.4%、0.8%、1.2%、2.4%、3.6%进行试验,测定生根率、根寿命、根系生物量等生长指标及根中过氧化氢酶(CAT)、ATP合成酶活性和脱落酸(ABA)含量等生理指标,研究不同盐分水平对根系生长及生理特性的影响。结果表明:中国柽柳和甘蒙柽柳适合扦插在含盐量低于0.8%的培养溶液中;含盐量超过0.8%后,扦插穗生根率显著降低,且含盐量3.6%时甘蒙柽柳不生根;含盐量超过1.2%时,中国柽柳及甘蒙柽柳根系生长受到显著抑制,且中国柽柳受抑制程度较大;中国柽柳和甘蒙柽柳在高盐条件下均会通过增加根系生物量分配比例来缓解盐分对根系的危害;中国柽柳ATP合成酶活性、CAT活性在含盐量低于0.8%时增加,含盐量超过0.8%时,活性降低;脱落酸含量随含盐量增加先增加,含盐量超过1.2%时减少;甘蒙柽柳则随含盐量升高一直保持减少趋势。
译  名：
Effects of different salinity levels on the growth and physiological characteristics of roots of Tamarix chinensis and T. austromongolica
作  者：
SONG Xiang-jing;LI Sheng-nan;WEI Wei;GUO Jia;YU Yi-lei;LIU Zhi-wei;Institute of Wetland Research,Chinese Academy of Forestry,Beijing Key Laboratory of Wetland Services and Restoration;
关键词：
Tamarix chinensis;;Tamarix austromongolica;;roots;;salinity;;effect
摘  要：
Tamarix species are dominant shrubs in the Yellow River Delta region,and they can adapt to saline environment well.Roots can directly sense soil salinity change.Therefore,studying the effects of differing salinity on the eco-physiological characteristics of roots of Tamarix species is important for the ecological restoration of coastal wetlands.In the present study,we studied the effects of different salinities(0,0.4%,0.8%,1.2%,2.4% and 3.6% Na Cl solutions) on the growth and eco-physiological characteristics of roots of 1-year-old T.chinensis and T.austromongolica cuttings.We determined the rooting rate of Tamarix cuttings,root lifespan,root number,root length,root biomass,hydrogen peroxide enzyme(CAT) activity,adenosine triphosphate(ATP) synthase activity,and abscisic acid content.The cuttings of the two Tamarix species were suitable for cultivation at solutions with a salt content of lower than 0.8%.The rooting rate of the two species decreased significantly when salt content was more than 0.8%,and T.austromongolica cuttings did not produce roots when salt content was at 3.6%.The root growth of both Tamarix species was significantly inhibited when the salinity increased to more than 1.2%,especially for T.chinensis.Both Tamarix species could relieve the harm of salt to their roots by increasing the proportion of root biomass allocation under high salt conditions.The activities of ATP synthase and CAT of T.chinensis roots increased when the salinity was less than 0.8%,and the activities decreased when the salt content was more than 0.8%.The content of abscisic acid(ABA) of T.chinensis roots increased with the increasing salinity,and then decreased when the salinity was higher than 1.2%.The activities of ATP synthase and CAT and the content of ABA of T.austromongolica roots decreased gradually with the increasing salinity.

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