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中国沙漠 ›› 2014, Vol. 34 ›› Issue (6): 1509-1515.DOI: 10.7522/j.issn.1000-694X.2013.00313

• 生物与土壤 • 上一篇    下一篇

NaCl处理对多枝柽柳(Tamarixramosissima)生长及生理的影响

鲁艳, 雷加强, 曾凡江, 徐立帅, 彭守兰, 高欢欢, 刘国军   

  1. 中国科学院新疆生态与地理研究所 新疆策勒荒漠草地生态系统国家野外科学观测研究站, 新疆 乌鲁木齐 830011
  • 收稿日期:2013-08-12 修回日期:2013-09-27 出版日期:2014-11-20 发布日期:2014-11-20
  • 作者简介:鲁艳(1983- ),女,新疆博乐人,助理研究员,主要从事植物生态学研究. Email:luyanu@126.com
  • 基金资助:
    中国科学院“西部之光”人才培养计划西部博士专项(XBBS201109);国家自然科学基金项目(41301103)资助

Effects of NaCl Treatments on Growth and Eco-physiological Characteristics of Tamarix ramosissima

Lu Yan, Lei Jiaqiang, Zeng Fanjiang, Xu Lishuai, Peng Shoulan, Gao Huanhuan, Liu Guojun   

  1. Cele National Station of Observation & Research for Desert-Grassland Ecosystem in Xinjiang, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
  • Received:2013-08-12 Revised:2013-09-27 Online:2014-11-20 Published:2014-11-20

摘要: 以1年生多枝柽柳(Tamarix ramosissima)幼株为材料,采用盆栽试验研究不同浓度(0、50、100、200、400 mmol·L-1)NaCl处理对多枝柽柳生长状况及叶片过氧化氢(H2O2)、丙二醛(MDA)含量,超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶( POD)、抗坏血酸过氧化物酶(APX)活性,水势,可溶性糖和脯氨酸含量的影响.结果表明:低浓度(≤100 mmol·L-1)的NaCl处理对多枝柽柳株高、冠幅面积、分枝数和叶、枝干重具有促进效应;高浓度(≥200 mmol·L-1)的NaCl处理抑制了多枝柽柳生长,对侧根干重的抑制作用大于对冠幅面积、分枝数、叶干重、枝干重及株高的抑制.H2O2和MDA含量在低浓度(≤100 mmol·L-1)NaCl处理下较对照未出现积累现象,随NaCl浓度升高(≥200 mmol·L-1)二者含量较对照出现显著积累.低浓度(≤100 mmol·L-1)NaCl处理下,多枝柽柳叶片SOD、POD、CAT和APX活性较对照均有所提高,高浓度的NaCl处理下SOD和POD活性开始降低.多枝柽柳叶片水势随NaCl处理浓度升高呈显著下降趋势.低浓度(≤100 mmol·L-1)NaCl处理下脯氨酸和可溶性糖含量较对照呈上升趋势.

关键词: 多枝柽柳(Tamarix ramosissima), 盐胁迫, 抗氧化系统, 渗透调节

Abstract: A pot experiment was conducted to study the influence of different concentrations (0、50、100、200、400 mmol·L-1) NaCl on the growth, leaf hydrogen peroxide (H2O2), malonaldehyde (MDA) content, superoxide dismutases (SOD), catalases (CAT), peroxidase (POD), ascorbate peroxidase (APX) enzymes activity, water potential, soluble sugar and proline contents of Tamarix ramosissima young plant. The results showed that shoot height, crown area, number of branches, dry mass of leaf and branch of T. ramosissima were promoted at lower NaCl concentrations (≤100 mmol·L-1), however, the growth of T. ramosissima were inhibited at higher NaCl concentration (≥200 mmol·L-1), and the suppression effect to lateral root dry mass was larger to crown area, number of branches, dry mass of leaf and branch, and was larger to shoot height. H2O2 and MDA contents were not accumulated at lower NaCl concentrations, but accumulated at higher NaCl concentrations (≥200 mmol·L-1) compared with control level. SOD, POD, CAT and APX activities enhanced at lower NaCl concentrations (≤100 mmol·L-1) compared with control level, whereas SOD and POD activities began to descend at higher NaCl treatments. Water potential in leaves of T. ramosissima reduced significantly with the increasing in NaCl concentrations. Proline and soluble sugar contents increased at lower NaCl concentrations compared with control level.

Key words: Tamarix ramosissima, salinity stress, antioxidative enzyme system, osmotic regulation

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