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DOI	10.2478/fhort-2024-0008
	Effect of heat acclimation on thermotolerance of in vitro strawberry plantlets
	Seymour, Zevon Julio; Mercedes, Juan Francisco; Fang, Jong-Yi
发表日期	2024
ISSN	0867-1761
EISSN	2083-5965
英文摘要	Strawberry production is facing a serious decline with the increase in global temperature as a result of climate change. Improving the heat tolerance is imperative for the strawberry plants to remain productive under high temperature conditions. The present work aimed to study the effect of heat acclimation on the thermotolerance of strawberry plants subjected to severe heat stress. Tissue cultured Fragaria 'Taoyuan No. 1' plantlets were subjected to four heat-acclimation treatments with gradual increase of temperatures from 30 degrees C to 42 degrees C for 1.25 hr to 10 hr before exposing them to the lethal temperature of 48 degrees C for 4 hr. Survival, new leaf emergence and root growth, electrolyte leakage, chlorophyll and proline contents, as well as antioxidant enzyme activities were compared between the control, acclimated and non-acclimated plantlets. Results indicated that heat acclimation was required for the strawberry plantlets to survive under lethal temperature conditions. The acclimated plantlets registered a lower degree of electrolyte leakage and chlorophyll degradation, and a higher proline content compared to the non-acclimated plantlets. The activities of the antioxidant enzymes increased with the elevation of acclimation temperature and peaked at 42 degrees C except for ascorbate peroxidase (APX) whose activity peaked at 39 degrees C. Higher activities of superoxide dismutase (SOD), APX, glutathione reductase (GR), catalase (CAT) and peroxidase (POD) were observed in the acclimated plantlets compared to the non-acclimated plantlets. This study demonstrates that heat acclimation improved the thermotolerance of in vitro strawberry plantlets by reducing electrolyte leakage and chlorophyll degradation, as well as by enhancing proline content and antioxidant enzyme activities under severe heat stress.
英文关键词	antioxidant enzyme activity; climate action; Fragaria x ananassa; heat adaptation; heat tolerance; lethal temperature
语种	英语
WOS研究方向	Agriculture
WOS类目	Horticulture
WOS记录号	WOS:001207442400001
来源期刊	FOLIA HORTICULTURAE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302939
作者单位	National Pingtung University Science & Technology
推荐引用方式 GB/T 7714	Seymour, Zevon Julio,Mercedes, Juan Francisco,Fang, Jong-Yi. Effect of heat acclimation on thermotolerance of in vitro strawberry plantlets[J],2024.
APA	Seymour, Zevon Julio,Mercedes, Juan Francisco,&Fang, Jong-Yi.(2024).Effect of heat acclimation on thermotolerance of in vitro strawberry plantlets.FOLIA HORTICULTURAE.
MLA	Seymour, Zevon Julio,et al."Effect of heat acclimation on thermotolerance of in vitro strawberry plantlets".FOLIA HORTICULTURAE (2024).