气候变化领域集成服务门户(CCPortal): Mechanistic Insights on Salicylic Acid Mediated Enhancement of Photosystem II Function in Oregano Seedlings Subjected to Moderate Drought Stress

CCPortal

DOI	10.3390/plants12030518
	Mechanistic Insights on Salicylic Acid Mediated Enhancement of Photosystem II Function in Oregano Seedlings Subjected to Moderate Drought Stress
	Moustakas, Michael; Sperdouli, Ilektra; Moustaka, Julietta; Sas, Beguem; Isgoren, Sumrunaz; Morales, Fermin
发表日期	2023
EISSN	2223-7747
卷号	12 期号:3
英文摘要	Dramatic climate change has led to an increase in the intensity and frequency of drought episodes and, together with the high light conditions of the Mediterranean area, detrimentally influences crop production. Salicylic acid (SA) has been shown to supress phototoxicity, offering photosystem II (PSII) photoprotection. In the current study, we attempted to reveal the mechanism by which SA is improving PSII efficiency in oregano seedlings under moderate drought stress (MoDS). Foliar application of SA decreased chlorophyll content under normal growth conditions, but under MoDS increased chlorophyll content, compared to H2O-sprayed oregano seedlings. SA improved the PSII efficiency of oregano seedlings under normal growth conditions at high light (HL), and under MoDS, at both low light (LL) and HL. The mechanism by which, under normal growth conditions and HL, SA sprayed oregano seedlings compared to H2O-sprayed exhibited a more efficient PSII photochemistry, was the increased (17%) fraction of open PSII reaction centers (qp), and the increased (7%) efficiency of these open reaction centers (Fv '/Fm '), which resulted in an enhanced (24%) electron transport rate (ETR). SA application under MoDS, by modulating chlorophyll content, resulted in optimized antenna size and enhanced effective quantum yield of PSII photochemistry (phi(PSII)) under both LL (7%) and HL (25%), compared to non-SA-sprayed oregano seedlings. This increased effective quantum yield of PSII photochemistry (phi(PSII)) was due to the enhanced efficiency of the oxygen evolving complex (OEC), and the increased fraction of open PSII reaction centers (qp), which resulted in an increased electron transport rate (ETR) and a lower amount of singlet oxygen (O-1(2)) production with less excess excitation energy (EXC).
英文关键词	chlorophyll fluorescence; photosynthetic efficiency; light reactions; excess excitation energy; Origanum vulgare; reactive oxygen species; photoinhibition; photochemistry; photoprotection
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000931103200001
来源期刊	PLANTS-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/281557
作者单位	Aristotle University of Thessaloniki; University of Copenhagen; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC-GN-UPNA - Instituto de Agrobiotecnologia (IDAB); ITMO University; Istanbul Kultur University
推荐引用方式 GB/T 7714	Moustakas, Michael,Sperdouli, Ilektra,Moustaka, Julietta,et al. Mechanistic Insights on Salicylic Acid Mediated Enhancement of Photosystem II Function in Oregano Seedlings Subjected to Moderate Drought Stress[J],2023,12(3).
APA	Moustakas, Michael,Sperdouli, Ilektra,Moustaka, Julietta,Sas, Beguem,Isgoren, Sumrunaz,&Morales, Fermin.(2023).Mechanistic Insights on Salicylic Acid Mediated Enhancement of Photosystem II Function in Oregano Seedlings Subjected to Moderate Drought Stress.PLANTS-BASEL,12(3).
MLA	Moustakas, Michael,et al."Mechanistic Insights on Salicylic Acid Mediated Enhancement of Photosystem II Function in Oregano Seedlings Subjected to Moderate Drought Stress".PLANTS-BASEL 12.3(2023).