NaCl胁迫对大果白刺幼苗生长和抗逆生理特性的影响

应用生态学报

NaCl胁迫对大果白刺幼苗生长和抗逆生理特性的影响

鲁艳^**,雷加强,曾凡江,徐立帅,刘国军,彭守兰,黄彩变

(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, 乌鲁木齐 830011)

出版日期:2014-03-18 发布日期:2014-03-18

Effects of salt stress on Nitraria roborowskii growth and physiological characteristics of stress resistance.

LU Yan, LEI Jia-qiang, ZENG Fan-jiang, XU Li-shuai, LIU Guo-jun, PENG Shou-lan, HUANG Cai-bian

(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)

Online:2014-03-18 Published:2014-03-18

摘要/Abstract

摘要：

采用盆栽试验,研究了不同浓度(0、50、100、200和400 mmol·L^-1)NaCl处理对1年生大果白刺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)活性、过氧化氢酶(CAT)活性、过氧化物酶(POD)活性、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: 与对照相比,低浓度NaCl处理(≤50 mmol·L^-1)对大果白刺生长没有显著的抑制作用,叶片的SOD、POD、CAT和APX活性均有所提高;高浓度(＞50 mmol·L^-1)NaCl处理抑制了大果白刺的冠幅面积、分枝数和叶、枝、侧根干质量,叶片的SOD、CAT、POD活性和可溶性糖、脯氨酸含量显著下降. 随NaCl处理浓度升高,H₂O₂和MDA含量增加,叶片水势降低.

Abstract: A pot experiment was conducted to study the influences of different NaCl concentrations (0, 50, 100, 200, 400 mmol·L^-1) 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 Nitraria roborowskii. The results showed that the growth of N. roborowskii was not affected at lower NaCl concentrations (≤50 mmol·L^-1), while the SOD, POD, CAT and APX activities in leaves of N. roborowskii were increased. However, higher NaCl concentrations (＞50 mmol·L^-1) restrained the growth parameters of crown area, number of branches, dry mass of leaf, branch and lateral root, and remarkably reduced the SOD, POD and CAT activities, soluble sugar and proline contents in leaves of N. roborowskii. H₂O₂ and MDA contents in leaves were increased and water potential was reduced with increasing NaCl concentrations.

鲁艳**,雷加强,曾凡江,徐立帅,刘国军,彭守兰,黄彩变. NaCl胁迫对大果白刺幼苗生长和抗逆生理特性的影响[J]. 应用生态学报.

LU Yan, LEI Jia-qiang, ZENG Fan-jiang, XU Li-shuai, LIU Guo-jun, PENG Shou-lan, HUANG Cai-bian. Effects of salt stress on Nitraria roborowskii growth and physiological characteristics of stress resistance.[J]. Chinese Journal of Applied Ecology.