[1]王馨,闫永庆,殷媛,等.外源γ-氨基丁酸(GABA)对盐胁迫下西伯利亚白刺光合特性的影响[J].江苏农业学报,2019,(05):1032-1039.[doi:doi:10.3969/j.issn.1000-4440.2019.05.005]
 WANG Xin,YAN Yong-qing,YIN Yuan,et al.Effect of exogenous γ-aminobutyric acid(GABA) on photosynthetic characteristics of Nitraria sibirica pall under salt stress[J].,2019,(05):1032-1039.[doi:doi:10.3969/j.issn.1000-4440.2019.05.005]
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外源γ-氨基丁酸(GABA)对盐胁迫下西伯利亚白刺光合特性的影响()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年05期
页码:
1032-1039
栏目:
遗传育种·生理生化
出版日期:
2019-10-31

文章信息/Info

Title:
Effect of exogenous γ-aminobutyric acid(GABA) on photosynthetic characteristics of Nitraria sibirica pall under salt stress
作者:
王馨闫永庆殷媛刘威王贺季绍旭
(东北农业大学园艺园林学院,黑龙江哈尔滨150030)
Author(s):
WANG XinYAN Yong-qingYIN YuanLIU WeiWANG HeJI Shao-xu
(College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China)
关键词:
盐胁迫γ-氨基丁酸(GABA)西伯利亚白刺光合特性
Keywords:
salt stressγ-aminobutyric acid (GABA)Nitraria sibirica Pallphotosynthetic characteristics
分类号:
S793.9;Q945.78
DOI:
doi:10.3969/j.issn.1000-4440.2019.05.005
文献标志码:
A
摘要:
本研究以西伯利亚白刺为试验材料,分析了100~400 mmol/L NaCl胁迫下施加不同浓度(0~15 mmol/L) γ-氨基丁酸(GABA)对西伯利亚白刺叶片叶绿素含量(Chl)、净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs),胞间CO2浓度(Ci)、PSII最大光化学效率(Fv/Fm)、PSII实际光化学效率(φPSII)、光化学淬灭系数(qP)、非光化学淬灭系数(NPQ)及Mg2+-ATPase活性的影响。结果表明,在不施加外源GABA条件下,与对照相比,低浓度NaCl(≤300 mmol/L)处理可提高西伯利亚白刺叶片Pn、Tr、Gs,降低Ci、Chl,同时随着NaCl浓度的增加,西伯利亚白刺叶片Fv/Fm、φPSII、qP均增加,NPQ下降。在不施加外源GABA条件下,400 mmol/L NaCl处理的西伯利亚白刺叶片Chl、Pn、Tr、Fv/Fm、φPSII、qP及Mg2+-ATPase活性与对照相比均下降,而Ci、NPQ增加。与不施加外源GABA处理相比,施加5 mmol/L、10 mmol/L GABA对NaCl胁迫下西伯利亚白刺叶片Pn、Fv/Fm、qP有明显的促进作用,然而施加15 mmol/L GABA的促进效果不明显,甚至出现不同程度的抑制。可见,与对照相比,NaCl浓度≤300 mmol/L时,施加5 mmol/L、10 mmol/L外源GABA对西伯利亚白刺Pn、Tr、Fv/Fm、φPSII、qP有明显的促进效应,当NaCl浓度>300 mmol/L时,外源GABA对盐胁迫下西伯利亚白刺光合作用的促进效果不明显,甚至会抑制光合作用。
Abstract:
Using Nitraria sibirica as material, effects of different concentrations of γ-aminobutyric acid(GABA, 0-15 mmol/L) on chlorophyll content (Chl), net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), intercellular CO2 concentration (Ci), maximal photochemical efficiency of PSII (Fv/Fm), actual photochemical efficiency of PSII (φPSII), photochemical quenching coefficient (qP), non-photochemical quenching coefficient(NPQ) and Mg2+-ATPase activity of Nitraria sibirica leaves under the NaCl stress (100-400 mmol/L) were explored. The results showed that under the condition of no application of exogenous GABA, the treatment of low concentration NaCl (≤300 mmol/L) could increase Pn, Tr, Gs and decrease Ci and Chl in the leaves of Nitraria sibirica. At the same time, with the increase of NaCl concentration, Fv/Fm, φPSII, qP increased, while NPQ decreased. Under the condition of no application of exogenous GABA, Chl, Pn, Tr, Fv/Fm, φPSII, qP and Mg2+-ATPase activity of Nitraria sibirica leaves treated with 400 mmol/L NaCl decreased, while Ci and NPQ increased. When the concentration of GABA was less than 10 mmol/L, exogenous GABA could obviously promote Pn, Fv/Fm and qP of Nitraria sibirica leaves under NaCl stress, but the effect of 15 mmol/L GABA was not obvious. In summary, when the concentration of NaCl was less than 300 mmol/L, the treatments of 5 mmol/L exogenous GABA and 10 mmol/L exogenous GABA significantly promoted Pn, Tr, Fv/Fm, φPSII, qP of the Nitraria sibirica. When the concentration of NaCl was more than 300 mmol/L, exogenous GABA had no obvious promoting effect on photosynthesis of Nitraria sibirica under salt stress.

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备注/Memo

备注/Memo:
收稿日期:2018-12-01 基金项目:国家自然科学基金项目(31770437) 作者简介:王馨(1994-),女,黑龙江牡丹江人,硕士研究生,研究方向为植物逆境生理。(E-mail)1309112631@qq.com 通讯作者:闫永庆,(E-mail)yanyongqing1966@163.com
更新日期/Last Update: 2019-11-11