干旱区生态环境知识资源中心(Arid): 干旱环境3种荒漠灌木叶绿素荧光参数动态

Arid

	干旱环境3种荒漠灌木叶绿素荧光参数动态
其他题名	Dynamics of chlorophyll fluorescence parameters under drought condition for three desert shrub species
	靳川; 查天山; 贾昕; 田赟; 周文君; 杨双宝; 郭子繁
来源期刊	北京林业大学学报
ISSN	1000-1522
出版年	2020
卷号	42 期号:8 页码:72-80
中文摘要	【目的】研究荒漠植物生理特征对自然环境波动下的响应过程可以更好地认识和预测气候变化对荒漠生态系统的影响。【方法】本文研究了宁夏盐池油蒿、沙柳和杨柴3种荒漠灌木优势物种在春季干旱环境下光系统II(PSII)最大光化学效率(F_v/F_m)、实际光化学效率(Phi_(PSII))和非光化学淬灭(NPQ)对环境因子的响应,旨在探讨荒漠灌木在干旱环境下PSII的光合生理状态以及其保护调节机制。【结果】结果表明:在水分胁迫下(土壤含水量 <0.08 m~3/m~3),3种荒漠灌木F_v/F_m、Phi_(PSII)显著降低,NPQ显著增加(P <0.01),沙柳F_v/F_m显著低于油蒿并且显著高于杨柴(P <0.01),杨柴Phi_(PSII)显著低于油蒿和沙柳(P <0.01)。3种荒漠灌木Phi_(PSII)和NPQ受光合有效辐射(PAR)的影响呈现出明显的日变化,且PAR、空气温度(T_a)、相对湿度(RH)和饱和水汽压差(VPD)对Phi_(PSII)和NPQ均有影响。研究发现3种荒漠灌木PSII表现出不同受胁程度,其通过自身调节机制增加热耗散比例来抵御干旱下的环境胁迫。油蒿F_v/F_m能通过自身调节恢复到适宜状态值(约0.75),认为其反应中心损伤具有可恢复性。杨柴热耗散的光保护响应机制的敏感性较高,认为其受环境波动的影响较大。【结论】综上得出油蒿可以作为干旱区植被恢复的首选物种,沙柳其次,杨柴不建议考虑。可见由叶绿素荧光参数变化表征PSII反应中心的活性,可以充分体现荒漠灌木对环境波动的响应策略,可以作为探究干旱半干旱区荒漠植物对环境变化响应的重要手段。
英文摘要	[Objective] Research on the response process of physiological parameters of desert plants to natural environment fluctuations can better understand and predict the impact of climate change on desert ecosystems.[Method] We conducted in situ field measurements of chlorophyll fluorescence for three desert shrub species(Artemisia ordosica,Salix psammophila and Hedysarum mongolicum)to explore the responses of photosystem II(PSII)maximum quantum yield(Fv / Fm),photochemical efficiency(Phi_(PSII))and non-photochemical quenching(NPQ)to environmental factors,in order to understand the PSII photosynthetic physiology and its photoprotection mechanism of desert shrubs in arid environment.[Result] Under water stress(soil water content <0.08 m~3/m~3),Fv / Fm and Phi PSII of three kinds of desert shrubs were reduced and NPQ increased(P <0.01).The Fv / Fm of S.psammophila was lower than that of A.ordosica and higher than H.mongolicum(P <0.01).The Phi_(PSII) of H.mongolicum was lower than both A.ordosica and S.psammophila(P <0.01).The Phi_(PSII) and NPQ for three typical desert shrubs presented a clear daily variation with photosynthetic active radiation(PAR),and also were affected by air temperature(T_a),relative humidity(RH)and vapor pressure difference(VPD).Three shrub species resisted drought stress through heat dissipation mechanism,but had different degrees.The Fv / Fm of A.ordosica can be restored to an appropriate value of about 0.75 through self-regulation of heat dissipation,and its reaction center damage was recoverable.H.mongolicum was greatly affected by drought stress,and its photoprotective response of heat dissipation was sensitive.[Conclusion] A.ordosica can be considered as the first choice for vegetation restoration in arid areas,S.psammophila is the second and H.mongolicum is not recommended.The activity of PSII reaction center is characterized by changes in chlorophyll fluorescence parameters,which can fully reflect the response strategy of desert shrubs to environmental fluctuations,and can be used as an important means to explore the response of desert plants in arid and semi-arid areas to environmental changes.
中文关键词	干旱半干旱生态系统 ; 叶绿素荧光 ; 干旱 ; 荒漠灌木
英文关键词	arid and semiarid ecosystem chlorophyll fluorescence drought desert shrub
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6805195
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336903
作者单位	靳川, 北京林业大学水土保持学院;;北京林业大学, 宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;, 北京;;北京 100083;;100083, 中国.; 查天山, 北京林业大学水土保持学院;;北京林业大学, 宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;, 北京;;北京 100083;;100083, 中国.; 贾昕, 北京林业大学水土保持学院;;北京林业大学, 宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;, 北京;;北京 100083;;100083, 中国.; 田赟, 北京林业大学水土保持学院;;北京林业大学, 宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;, 北京;;北京 100083;;100083, 中国.; 周文君, 北京林业大学水土保持学院;;北京林业大学, 宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;, 北京;;北京 100083;;100083, 中国.; 郭子繁, 北京林业大学水土保持学院;;北京林业大学, 宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;, 北京;;北京 100083;;100083, 中国.; 杨双宝, 甘肃省小陇山林业调查规划院, 天水, 甘肃 741020, 中国.
推荐引用方式 GB/T 7714	靳川,查天山,贾昕,等. 干旱环境3种荒漠灌木叶绿素荧光参数动态[J]. 北京林业大学,2020,42(8):72-80.
APA	靳川.,查天山.,贾昕.,田赟.,周文君.,...&郭子繁.(2020).干旱环境3种荒漠灌木叶绿素荧光参数动态.北京林业大学学报,42(8),72-80.
MLA	靳川,et al."干旱环境3种荒漠灌木叶绿素荧光参数动态".北京林业大学学报 42.8(2020):72-80.