干旱区生态环境知识资源中心(Arid): 3种荒漠植物光合及叶绿素荧光对干旱胁迫的响应及抗旱性评价

Arid

	3种荒漠植物光合及叶绿素荧光对干旱胁迫的响应及抗旱性评价
其他题名	Photosynthetic and Chlorophyll Fluorescence Responses of Three Desert Species to Drought Stress and Evaluation of Drought Resistance
	王方琳; 柴成武; 赵鹏; 唐卫东; 付贵全; 孙涛; 胥宝一
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2021
卷号	41 期号:10 页码:1755-1765
中文摘要	利用盆栽试验结合人工浇水后自然耗水的方法测定干旱胁迫对梭梭、白刺、沙蒿3种荒漠植物叶片水分、光合及叶绿素荧光参数的影响,探讨各指标在干旱胁迫过程中的变化特征、响应机制及其与土壤水分的定量关系,并用隶属函数法对其进行抗旱性排序。结果表明:(1)3种植物叶片相对含水量(RWC)随干旱胁迫天数增加持续降低,最大水分亏缺(RWD)呈波动式上升趋势。(2)3种植物总叶绿素含量(Chl)和叶绿素a(Chla)、叶绿素b(Chlb)含量,以及梭梭、白刺类胡萝卜素含量均随胁迫天数增加而降低;沙蒿类胡萝卜素随土壤含水率降低逐渐升高。(3)梭梭、白刺、沙蒿叶片净光合速率(P_n)、蒸腾速率(Tr)、水分利用效率(WUE)等主要光合气体交换参数对土壤水分表现出明显的阈值响应,适宜的土壤含水率分别为8.04%~19.33%、4.17%~19.10%、6.48%~17.51%。(4)3种植物PSⅡ最大光化学效率(F_v/F_m)、实际光化学效率(F_v'/F_m')及光化学淬灭系数(qP)均随干旱胁迫天数增加和光照强度增大而降低,非光化学淬灭系数(NPQ)则呈逐渐上升趋势;干旱胁迫中后期,梭梭、沙蒿的F_v/F_m及F_v'/F_m'均下降,光合机构光合活性遭到破坏,电子传递受阻,PSⅡ反应中心受损,表现出光抑制,而白刺调节自身PSⅡ反应中心免受伤害的能力较强。(5)隶属函数法综合分析表明,3种植物耐旱能力大小依次为白刺>梭梭>沙蒿。研究发现,3种荒漠植物均可通过调节PSⅡ反应中心开放程度与活性,对干旱胁迫表现出较强的耐性,胁迫后期植物PSⅡ反应中心关闭或不可逆失活,表现出光抑制。
英文摘要	A pot experiment with natural water consumption after artificial watering was conducted to study the effects of drought stress on water,photosynthesis,chlorophyll fluorescence in leaves of three desert species,Haloxylon am modendron,Nitraria tangutorum and Artemisia desertorum.The change characteristics and response mechanism of each index in the process of drought stress and its quantitative relationship with soil water were discussed,and their drought resistance was ranked by membership function method.The results showed that:(1)the relative water content(RWC)of three species leaves decreased continuously with the extension of drought stress time,and the water deficit(RWD)showed a fluctuating upward trend.(2)The contents of Chl,Chla,Chlb of the three species and carotenoids in H.ammodendron and N.tangutorum was decreased with the increase of stress days.The carotenoids of Artemisia desertorumincreased with the decrease of soil moisture.(3)The P_n,Tr,WUE and other main gas exchange parameters of the three species showed significant threshold response to soil water content.The suitable soil water content thresholds for normal photosynthetic physiological activities were 8.04%- 19.33%,4.17%-19.10%and 6.48%-17.51%,respectively.(4)The F_v/F_m,F_v'/F_m'and qP of the three species decreased with the increase of drought stress days and light intensity,and NPQ showed a gradual upward trend.F_v/F_m and F_v'/F_m'of H.ammodendron,A.desertorum decreased,photosynthetic activity was destroyed,and electron transfer was blocked.PSⅡ reaction center was damaged and showed photoinhibition after 30 days and 18-30 days of stress.However,N.tangutorum has stronger ability to regulate its PSⅡ reaction center to avoid injury.(5)The comprehensive analysis of membership function method showed that the drought tolerance of three species was N.tangutorum,H.ammodendron and A.desertorum.The results showed that all the three desert species showed strong tolerance to drought stress by adjusting the opening degree and activity of PSⅡreaction center.At the late stage of stress,the plants PSⅡreaction center closed or irreversibly inactivated and showed photoinhibition.
中文关键词	荒漠植物 ; 干旱胁迫 ; 光合色素 ; 光合气体交换参数 ; 叶绿素荧光 ; 抗旱评价
英文关键词	desert species drought stress photosynthetic pigment photosynthetic gas exchange parameter chlorophyll fluorescence drought resistance evaluation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:7082589
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377997
作者单位	王方琳, 甘肃省治沙研究所;;甘肃省荒漠化与风沙灾害防治国家重点实验室, ;;甘肃省荒漠化与风沙灾害防治国家重点实验室, 兰州;;武威, ;;甘肃 730070;;733000.; 柴成武, 甘肃省治沙研究所, 兰州, 甘肃 730070, 中国.; 赵鹏, 甘肃省治沙研究所, 兰州, 甘肃 730070, 中国.; 唐卫东, 甘肃省治沙研究所, 兰州, 甘肃 730070, 中国.; 付贵全, 甘肃省治沙研究所, 兰州, 甘肃 730070, 中国.; 孙涛, 甘肃省治沙研究所, 兰州, 甘肃 730070, 中国.; 胥宝一, 甘肃省治沙研究所, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	王方琳,柴成武,赵鹏,等. 3种荒漠植物光合及叶绿素荧光对干旱胁迫的响应及抗旱性评价[J],2021,41(10):1755-1765.
APA	王方琳.,柴成武.,赵鹏.,唐卫东.,付贵全.,...&胥宝一.(2021).3种荒漠植物光合及叶绿素荧光对干旱胁迫的响应及抗旱性评价.西北植物学报,41(10),1755-1765.
MLA	王方琳,et al."3种荒漠植物光合及叶绿素荧光对干旱胁迫的响应及抗旱性评价".西北植物学报 41.10(2021):1755-1765.