气候变化领域集成服务门户(CCPortal): The Impact of Water Potential and Temperature on Native Species' Capability for Seed Germination in the Loess Plateau Region, China

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DOI	10.3390/plants13050693
	The Impact of Water Potential and Temperature on Native Species' Capability for Seed Germination in the Loess Plateau Region, China
	Hu, Guifang; He, Xinyue; Wang, Ning; Liu, Jun'e; Zhou, Zhengchao
发表日期	2024
ISSN	2223-7747
起始页码	13
结束页码	5
卷号	13 期号:5
英文摘要	Global warming is increasing the frequency and intensity of heat waves and droughts. One important phase in the life cycle of plants is seed germination. To date, the association of the temperature and water potential thresholds of germination with seed traits has not been explored in much detail. Therefore, we set up different temperature gradients (5-35 degrees C), water potential gradients (-1.2-0 MPa), and temperature x water potential combinations for nine native plants in the Loess Plateau region to clarify the temperature and water combinations suitable for their germination. Meanwhile, we elucidated the temperature and water potential thresholds of the plants and their correlations with the mean seed mass and flatness index by using the thermal time and hydrotime models. According to our findings, the germination rate was positively correlated with the germination percentage and water potential, with the former rising and the latter decreasing as the temperature increased. Using the thermal time and hydrotime models, the seed germination thresholds could be predicted accurately, and the germination thresholds of the studied species varied with an increase in germination percentage. Moreover, temperature altered the impact of water potential on the germination rate. Overall, the base water potential for germination, but not the temperature threshold, was negatively correlated with mean seed mass and was lower for rounder seeds than for longer seeds. This study contributes to improving our understanding of the seed germination characteristics of typical plants and has important implications for the management and vegetation restoration of degraded grasslands.
英文关键词	seed germination; temperature; water potential; thermal time model; hydrotime model; Loess Plateau
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001183119200001
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/300351
作者单位	Shaanxi Normal University
推荐引用方式 GB/T 7714	Hu, Guifang,He, Xinyue,Wang, Ning,et al. The Impact of Water Potential and Temperature on Native Species' Capability for Seed Germination in the Loess Plateau Region, China[J],2024,13(5).
APA	Hu, Guifang,He, Xinyue,Wang, Ning,Liu, Jun'e,&Zhou, Zhengchao.(2024).The Impact of Water Potential and Temperature on Native Species' Capability for Seed Germination in the Loess Plateau Region, China.PLANTS-BASEL,13(5).
MLA	Hu, Guifang,et al."The Impact of Water Potential and Temperature on Native Species' Capability for Seed Germination in the Loess Plateau Region, China".PLANTS-BASEL 13.5(2024).