气候变化领域集成服务门户(CCPortal): Sensitivity and Regulation of Diel Photosynthesis in Red-Fleshed Pitaya (Hylocereus polyrhizus) Micropropagules under Mannitol-Induced Water Stress/Rehydration Cycle In Vitro

CCPortal

DOI	10.3390/horticulturae10030235
	Sensitivity and Regulation of Diel Photosynthesis in Red-Fleshed Pitaya (Hylocereus polyrhizus) Micropropagules under Mannitol-Induced Water Stress/Rehydration Cycle In Vitro
	Lee, Yu-Chi; Chang, Jer-Chia
发表日期	2024
EISSN	2311-7524
起始页码	10
结束页码	3
卷号	10 期号:3
英文摘要	Climate change-induced prolonged water stress (WS) affects crassulacean acid metabolism photosynthesis in pitaya (Hylocereus), limiting crop productivity through insufficient photosynthate. To document how WS/rehydration affects diel photosynthesis, red-fleshed pitaya (H. polyrhizus) micropropagules were studied for 5 weeks in a mannitol-induced water potential gradient replaced with moderate (MWS; -1.0 MPa in week 2; -0.5 MPa for the rest) or intensified (IWS; -1.0 and -1.5 MPa in weeks 2 and 3; -0.5 MPa for the rest) WS in vitro. Net photosynthetic rate (Pn) and integrated net CO2 uptake (INCU) were measured using an Arduino-based photosynthesis system. Micropropagules under MWS had similar Pn in weeks 5 and 1, whereas the control (-0.5 MPa) increased. Pn recovery did not occur after IWS. The average relative INCU was similar in the control and MWS, but lower in IWS. The Pn difference increased with WS, becoming more evident at dawn (Phase II), evening (Phase IV), and predawn the next day (Phase I), and occurred earlier in Phases IV and I under IWS. MWS did not reduce photosynthesis, demonstrating that the photosynthetic regulation could respond to short-term WS in pitaya and indicating the potential of watering for Pn recovery at evening and predawn under IWS.
英文关键词	pitahaya; crassulacean acid metabolism; diel CO2 uptake; photosynthetic pattern; phase; water stress; water potential
语种	英语
WOS研究方向	Agriculture
WOS类目	Horticulture
WOS记录号	WOS:001193494000001
来源期刊	HORTICULTURAE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297335
作者单位	National Chung Hsing University
推荐引用方式 GB/T 7714	Lee, Yu-Chi,Chang, Jer-Chia. Sensitivity and Regulation of Diel Photosynthesis in Red-Fleshed Pitaya (Hylocereus polyrhizus) Micropropagules under Mannitol-Induced Water Stress/Rehydration Cycle In Vitro[J],2024,10(3).
APA	Lee, Yu-Chi,&Chang, Jer-Chia.(2024).Sensitivity and Regulation of Diel Photosynthesis in Red-Fleshed Pitaya (Hylocereus polyrhizus) Micropropagules under Mannitol-Induced Water Stress/Rehydration Cycle In Vitro.HORTICULTURAE,10(3).
MLA	Lee, Yu-Chi,et al."Sensitivity and Regulation of Diel Photosynthesis in Red-Fleshed Pitaya (Hylocereus polyrhizus) Micropropagules under Mannitol-Induced Water Stress/Rehydration Cycle In Vitro".HORTICULTURAE 10.3(2024).