Age-related differences in physiological and metabolic responses of Pleione aurita (Orchidaceae) pseudobulbs to drought stress and recovery

doi:10.1016/j.plaphy.2023.107655

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	Age-related differences in physiological and metabolic responses of Pleione aurita (Orchidaceae) pseudobulbs to drought stress and recovery
	Zhang,Wei; Dong,Xiu-Mei; Zhang,Yu-Wen; Fan,Ze-Xin; Zhang,Shi-Bao
	2023
发表期刊	PLANT PHYSIOLOGY AND BIOCHEMISTRY
ISSN	1873-2690
卷号	197 页码:107655
摘要	ABS T R A C T The pseudobulb is a storage organ for water and nutrients that plays a crucial role in the growth and survival of epiphytic orchids. However, the role of water and metabolites in pseudobulb during adaptation to environmental stress are rarely detected through control experiments. In the present study, water-related physiological traits and metabolite changes in the pseudobulbs at the flowering stage and full leaf expansion stage for Pleione aurita were investigated after drought stress and recovery treatments. We found that the composition of non-structural carbohydrates (starch vs. soluble sugar) varied over the lifetime of pseudobulbs, and older pseudobulbs stored more water, whereas younger pseudobulbs stored more dry matter. When plants were subjected to drought stress and subsequent recovery, multiple metabolites in the pseudobulbs including non-structural carbohydrates, fla-vonoids, phenolic acids, as well as amino acids and their derivatives responded positively to these water level fluctuations. For those metabolites that differently accumulated in both stress and recovery processes, old pseudobulbs contained a higher number of these key metabolites than did the connected younger pseudobulbs. In addition, young and old pseudobulbs use different metabolic pathways to both respond and recover to drought. These results indicate that orchid pseudobulbs cope with water level fluctuations by mobilizing metabolite re-serves and that pseudobulbs of different ages exhibit different physiological and metabolic responses to drought stress. These findings broadens our understanding of the role pseudobulbs play in the survival of orchids growing in epiphytic habitats.
关键词	Epiphytic plant Drought stress Metabolomics Physiological integration Pleione Pseudobulb SECONDARY METABOLITES WATER-DEFICIT GROWTH ACCUMULATION FLAVONOIDS LEAVES ACID SIZE CARBOHYDRATE MOBILIZATION
学科领域	Plant Sciences
DOI	10.1016/j.plaphy.2023.107655
收录类别	SCI
WOS记录号	WOS:000967954200001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75394
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Zhang,Wei,Dong,Xiu-Mei,Zhang,Yu-Wen,et al. Age-related differences in physiological and metabolic responses of Pleione aurita (Orchidaceae) pseudobulbs to drought stress and recovery[J]. PLANT PHYSIOLOGY AND BIOCHEMISTRY,2023,197:107655.
APA	Zhang,Wei,Dong,Xiu-Mei,Zhang,Yu-Wen,Fan,Ze-Xin,&Zhang,Shi-Bao.(2023).Age-related differences in physiological and metabolic responses of Pleione aurita (Orchidaceae) pseudobulbs to drought stress and recovery.PLANT PHYSIOLOGY AND BIOCHEMISTRY,197,107655.
MLA	Zhang,Wei,et al."Age-related differences in physiological and metabolic responses of Pleione aurita (Orchidaceae) pseudobulbs to drought stress and recovery".PLANT PHYSIOLOGY AND BIOCHEMISTRY 197(2023):107655.

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