气候变化领域集成服务门户(CCPortal): Salt Addition Mitigate Mortality Risk and Prolong Survival of Robinia pseudoacacia Subjected to Drought Stress

CCPortal

DOI	10.3390/agronomy14030439
	Salt Addition Mitigate Mortality Risk and Prolong Survival of Robinia pseudoacacia Subjected to Drought Stress
	Fan, Yanli; Wang, Jianlong; Yan, Meifang; Wang, Xia; Du, Guangyuan; Li, Huijie; Li, Min; Si, Bingcheng
发表日期	2024
EISSN	2073-4395
起始页码	14
结束页码	3
卷号	14 期号:3
英文摘要	Global climate change is increasing the frequency and intensity of drought and salt stress worldwide, with profound impacts on tree growth and survival. However, the response of plant hydraulic transport and carbon balance to combined drought and salt stress remains unclear. This study investigated the leaf physiological traits, stem xylem hydraulic traits, and nonstructural carbohydrate concentration of Robinia pseudoacacia seedlings under normal irrigation treatment (CK, freshwater at 80-100% FC); salt stress treatment (SS, 0.3% soil salinity with freshwater); drought stress treatment (DS, withholding irrigation); and combined drought and salt treatments (SDS, 0.3% soil salinity withholding irrigation). Our results showed that the leaf physiological traits responded differently to different treatments. DS and SDS treatment significantly decreased leaf water potential and stomatal conductance, while SS treatment did not. DS treatment increased stomatal density but decreased stomatal area to adapt to water deficit, while SS and SDS treatment decreased stomatal length or width. In terms of xylem hydraulic traits, SS, DS and SDS significantly decreased xylem specific hydraulic conductivity by 47%, 42% and 49%, while percent loss of conductivity (PLC) significantly increased by 81% and 62% in DS and SDS, but the PLC of SS was not increased significantly. Additionally, net photosynthetic rate and transpiration rate significantly decreased in SS, DS and SDS, while leaf water use efficiency significantly increased. The chlorophyll content index and maximum light quantum efficiency of photosystem II were also decreased. For nonstructural carbohydrate, the soluble sugars, starch and total non-structural carbohydrate were significantly decreased in DS in specific tissues, showing reductions of 42%, 68%, and 56% in leaves, 69%, 61%, and 62% in stem, and 30%, 59%, and 57% in root. Our findings provide evidence that salt addition alleviated drought stress by improving hydraulic traits and carbohydrate reserves, which is expected to contribute to predicting future vegetation dynamics under climate change.
英文关键词	drought stress; salt stress; gas exchange; hydraulic conductivity; non-structural carbohydrates
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences
WOS记录号	WOS:001191995700001
来源期刊	AGRONOMY-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/291060
作者单位	Northwest A&F University - China; Northwest A&F University - China; Ludong University; University of Saskatchewan
推荐引用方式 GB/T 7714	Fan, Yanli,Wang, Jianlong,Yan, Meifang,et al. Salt Addition Mitigate Mortality Risk and Prolong Survival of Robinia pseudoacacia Subjected to Drought Stress[J],2024,14(3).
APA	Fan, Yanli.,Wang, Jianlong.,Yan, Meifang.,Wang, Xia.,Du, Guangyuan.,...&Si, Bingcheng.(2024).Salt Addition Mitigate Mortality Risk and Prolong Survival of Robinia pseudoacacia Subjected to Drought Stress.AGRONOMY-BASEL,14(3).
MLA	Fan, Yanli,et al."Salt Addition Mitigate Mortality Risk and Prolong Survival of Robinia pseudoacacia Subjected to Drought Stress".AGRONOMY-BASEL 14.3(2024).