Photosynthetic performance and growth traits in Pennisetum centrasiaticum exposed to drought and rewatering under different soil nutrient regimes (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Photosynthetic performance and growth traits in Pennisetum centrasiaticum exposed to drought and rewatering under different soil nutrient regimes (SCI)
	Luo Y. Y. ; Zhao X. Y. ; Qu H. ; Zuo X. A. ; Wang S. K. ; Huang W. D. ; Luo Y. Q. ; Chen M.
刊名	Acta Physiologiae Plantarum
	2014
卷号	36 期号:2 页码:381-388
英文摘要	Responses of plants exposed to drought and rewatering have been well documented; however, little is known concerning strategies of psammophyte to drought and rewatering under different soil nutrient regimes. For this study, Pennisetum centrasiaticum under two soil nutrient regimes was subjected to progressive drought and subsequent rewatering. Soil water status, gas exchange characteristics, chlorophyll a fluorescence characteristics as well as biomass traits were measured to investigate ecophysiological responses. Net photosynthesis rate (P (n)), stomatal conductance (g (s)), water use efficiency, maximum quantum efficiency of photosynthesis system II (PSII, F (V)/F (M)), electron transport flux per cross section (ET0/CS0), and performance index on cross section basis (PICS) were suppressed during drought periods for both nutrient regimes. Meanwhile, leaf intercellular CO2 concentration (C (i) ), minimal fluorescence intensity (F (0)), and dissipated energy flux per cross section (DI0/CS0) increased. Reversible downregulation of PSII photochemistry and enhanced thermal dissipation of excess excitation energy (DI0/CS0) contributed to enhanced photo-protection in drought-stressed plants. Thus, the results indicate that P. centrasiaticum is capable of withstanding and surviving extreme drought events, and the recovery pattern of stressed P. centrasiaticum under both nutrient regimes was similar. However, fertilization increased the biomass and the variation in gas exchange and chlorophyll a fluorescence characteristics during drought periods. Additionally, fertilization accelerated the process of drought and aggravated stress under extreme drought events. Thus, the fertilization strategy used in P. centrasiaticum restoration should be carefully selected-fertilization may not always be beneficial.
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/24912]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Luo Y. Y.,Zhao X. Y.,Qu H.,et al. Photosynthetic performance and growth traits in Pennisetum centrasiaticum exposed to drought and rewatering under different soil nutrient regimes (SCI)[J]. Acta Physiologiae Plantarum,2014,36(2):381-388.
APA	Luo Y. Y..,Zhao X. Y..,Qu H..,Zuo X. A..,Wang S. K..,...&Chen M..(2014).Photosynthetic performance and growth traits in Pennisetum centrasiaticum exposed to drought and rewatering under different soil nutrient regimes (SCI).Acta Physiologiae Plantarum,36(2),381-388.
MLA	Luo Y. Y.,et al."Photosynthetic performance and growth traits in Pennisetum centrasiaticum exposed to drought and rewatering under different soil nutrient regimes (SCI)".Acta Physiologiae Plantarum 36.2(2014):381-388.