干旱区生态环境知识资源中心(Arid): 极端干旱区疏叶骆驼刺叶绿素荧光对人工水分干扰的响应特征

Arid

	极端干旱区疏叶骆驼刺叶绿素荧光对人工水分干扰的响应特征
其他题名	Response Characteristics of Chlorophyll Fluorescence of Alhagi sparsifolia to Different Irrigation Regimes in the Extremely Arid Area
	王明慧 1; 马晓东 1; 张瑞群 1; 李卫红2 ; 朱成刚 2
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2014
卷号	34 期号:9 页码:1860-1868
中文摘要	选取塔里木河下游天然植被恢复示范区的疏叶骆驼刺(Alhagi sparsifolia Shap.)为研究对象,测定每年引水灌溉2次(每次0.42 m~3/m~2)、l次和不灌溉(CK)处理下疏叶骆驼刺的实际光化学量子产量(Ф_(PSII))、电子传输速率(ETR)和光化学猝灭系数(q_P)等叶绿素荧光参数及其叶水势变化,探讨疏叶骆驼刺对人工水分干扰的叶绿素荧光响应特征。结果表明:(1)随着灌溉量的减少,疏叶骆驼刺叶水势呈显著降低的趋势,并在CK下达到最低。(2)同期疏叶骆驼刺q_P、Ф_(PSII)、ETR、最大光量子产量(F_v/F_m)、叶绿素含量和光饱和点均随着灌溉量的减少呈先增加后降低的趋势,非光化学淬灭系数(NPQ)和调节性能量耗散(Y_(NPQ))则呈先降低后增加的趋势。(3)与每年1次灌溉量处理相比,不灌溉和每年2次的灌溉量处理下疏叶骆驼刺发生了光抑制,光能捕获效率与光化学反应能量下降,热耗散能力提高。研究认为,灌溉量过高(每年2次,0.84 m~3/m~2)或不灌溉均会限制疏叶骆驼刺光化学效率和光和活性,适时适量的(春季灌水1次,0.42 m~3/m~2)水分补给更有利于疏叶骆驼刺适应干旱胁迫并维持正常光合生长。
英文摘要	The experiment was conducted with Alhagi sparsifolia of the natural vegetation area in fllower reaches of Tarim River to investigate the change of the chlorophyll fluorescence parameters such as actual photochemical efficiency of PS II (Ф_(PSII)),electron transport rate(ETR) and photochemical quenching index (q_P) and leaf water potential under 2 times/year, 1 times/year irrigation regimes (0.42 m~3/m~2 of every time) and no irrigation(CK),and to discuss the impact of the different irrigation regimes on the chlorophyll fluorescence characteristics.The conclusions were as following: (1) With decreasing irrigation regimes, the leaf water potential of A.sparsifolia significantly decreased, and was the least under CK.(2)The q_P,Ф_(PSII), ETR, the maximal photochemical efficiencies of PSII(F_v/F_m),chlorophyll SPAD value and the light saturation point of A.sparsifolia were initially increased with the decreasing irrigation regimes and then it decreased.Whereas,the non-photochemical quenching(NPQ) and the yield for dissipation by down-regulation (Y_(NPQ)) of A.sparsi folia were also reduced first with decreasing irrigation regimes and then it improved.(3)A.sparsi folia under CK and 2 times/year irrigation regimes suffered inhibitory effect which declined its light utilization capability and photochemical reaction, However the heat dissipation ability was improved.As a result, excessive amount of irrigation (2 times/year, 0.84 m~3/m~2) or no water supply (CK) could restrict the photochemical efficiency and photosynthetic activity of A.sparsi folia.The right time and the moderate water supply(supply water once in the spring,0.42 m~3/m~2) was more conducive to A.sparsi folia to adapt to drought stress and maintain normal growth photosynthesis.
中文关键词	灌溉 ; 叶绿素荧光 ; 疏叶骆驼刺 ; 水势 ; 光抑制 ; 叶绿素含量
英文关键词	irrigation chlorophyll fluorescence Alhagi sparsi folia Shap. water potential photoinhibition chlorophyll content
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5256424
来源机构	新疆师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231916
作者单位	1.新疆师范大学生命科学学院, 新疆特殊环境物种多样性应用与调控重点试验室, 乌鲁木齐, 新疆 830054, 中国; 2.荒漠与绿洲生态国家重点试验室, 荒漠与绿洲生态国家重点试验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	王明慧,马晓东,张瑞群,等. 极端干旱区疏叶骆驼刺叶绿素荧光对人工水分干扰的响应特征[J]. 新疆师范大学,2014,34(9):1860-1868.
APA	王明慧,马晓东,张瑞群,李卫红,&朱成刚.(2014).极端干旱区疏叶骆驼刺叶绿素荧光对人工水分干扰的响应特征.西北植物学报,34(9),1860-1868.
MLA	王明慧,et al."极端干旱区疏叶骆驼刺叶绿素荧光对人工水分干扰的响应特征".西北植物学报 34.9(2014):1860-1868.