干旱区生态环境知识资源中心(Arid): Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila

Arid

DOI	10.1007/s00468-021-02232-6
	Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila
	Mu, Deyu; Ding, Chen
通讯作者	Mu, DY (corresponding author), Shandong Jianzhu Univ, Sch Art, Inst Ornamental Plants, Jinan 250000, Shandong, Peoples R China. ; Ding, C (corresponding author), Texas A&M Forest Serv, Western Gulf Forest Tree Improvement Program, Bldg 1042,Agron Rd,TAMU 2585, College Stn, TX 77843 USA.
来源期刊	TREES-STRUCTURE AND FUNCTION
ISSN	0931-1890
EISSN	1432-2285
出版年	2021-11
英文摘要	Elevated salinity is one of the major environmental factors limiting plant growth and development. Salinity stress compromises survival and production of commercial plantations, urban forests, and agricultural crops in arid and semi-arid regions and in intertidal zones. Ulmus pumila, a salt-tolerant tree species indigenous in Asia, is widely deployed in salt-affected areas in China and holds promise for multi-varietal forestry (MWF) and urban forests. The mechanism of salt tolerance in U. pumila remains unknown. Here, we investigated the physiological responses to salinity stress based on antioxidant enzyme activity, osmotic adjustments, and gas exchange among salt-tolerant U. pumila genotypes for 100 days. The sampled trees were treated at age 2 under five different NaCl levels (0%, 0.3%, 0.5%, 0.7%, and 0.9% w/v) with natural surroundings and rain shades. Salt stress suppressed the growth in height (HR), ground diameter (DR), and dry weight (biomass) significantly among genotypes. The HR and performance indices were positively correlated with photosynthetic rate (Pn), apparent mesophyll conductance (AMC), and chlorophyll (CHLL) but were negatively associated with the free proline, sugar, and protein accumulation (r = - 0.5 to - 0.7***). We found that high accumulation of sugars and higher activity of the SOD enzyme in leaf tissue contributed to the osmotic adjustment and reactive oxygen species (ROS) scavenging system under salinity treatments. Sugar content and SOD activity play key roles in U. pumila's salinity tolerance and are promising indicators for ex vitro selection applications. Our result from ex vitro selection aligns with those of previous in vitro studies (Mu et al. in Acta Physiol Plant 38:1-16, 2016).
英文关键词	Ulmus pumila Salt stress Salt-tolerance Antioxidants Osmolytes Gas exchange
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000713913000001
WOS关键词	HORQIN SANDY LAND ; SALT STRESS ; OSMOTIC ADJUSTMENT ; PROLINE ACCUMULATION ; GENETIC-VARIABILITY ; ANTIOXIDANT ENZYME ; SORGHUM GENOTYPES ; GLYCINE BETAINE ; WHEAT CULTIVARS ; SIBERIAN ELM
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367718
作者单位	[Mu, Deyu] Shandong Jianzhu Univ, Sch Art, Inst Ornamental Plants, Jinan 250000, Shandong, Peoples R China; [Ding, Chen] Texas A&M Forest Serv, Western Gulf Forest Tree Improvement Program, Bldg 1042,Agron Rd,TAMU 2585, College Stn, TX 77843 USA
推荐引用方式 GB/T 7714	Mu, Deyu,Ding, Chen. Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila[J],2021.
APA	Mu, Deyu,&Ding, Chen.(2021).Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila.TREES-STRUCTURE AND FUNCTION.
MLA	Mu, Deyu,et al."Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila".TREES-STRUCTURE AND FUNCTION (2021).