caa a22 4500 605480648 CHVBK 20210128100416.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s11099-015-0127-0 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0127-0 Responses of gas exchange, chlorophyll synthesis and ROS-scavenging systems to salinity stress in two ramie ( Boehmeria nivea L.) cultivars [Elektronische Daten] [C. Huang, G. Wei, Y. Jie, J. Xu, S. Zhao, L. Wang, S. Anjum] Ramie (Boehmeria nivea L.) is an important crop that serves as fine fiber material, high protein feedstuff, and valuable herbal medicine in China. However, increasing salinity in soil limits the productivity. We investigated in a greenhouse experiment responses to salinity in two ramie cultivars, Chuanzhu-12 (salt-tolerant cultivar, ST) and Xiangzhu-2 (salt-sensitive cultivar, SS), to elucidate the salt tolerance mechanism of this species. Salinity stress substantially reduced both chlorophyll and carotenoid contents. In addition, net photosynthesis, transpiration rate, stomatal conductance, intercellular CO2 concentration, and the ratio of intercellular CO2 to ambient CO2 were affected, less in ST. Nevertheless, salinity stress markedly improved water use efficiency and intrinsic water use efficiency in both species. Moreover, relative water contents, soluble proteins, and catalase activity were substantially impaired, while proline accumulation and superoxide dismutase activity were enhanced substantially, more in ST. Furthermore, noteworthy increase in peroxidase activity and decrease in malondialdehyde content was recorded in ST, whereas, in SS, these attributes changed conversely. Overall, the cultivar ST exhibited salt tolerance due to its higher photosynthetic capacity, chlorophyll content, antioxidative enzyme activity, and nonenzymatic antioxidants, as well as reduced lipid peroxidation and maintenance of the tissue water content. This revealed the salt tolerance mechanism of ramie plants for adaptation to salt affected soil. The Institute of Experimental Botany, 2015 abiotic stress nationallicence photosynthesis nationallicence pigments nationallicence lipid peroxidation nationallicence antioxidant enzymes nationallicence Car : carotenoids nationallicence CAT : catalase nationallicence Chl a : chlorophyll nationallicence C i : intercellular CO2 nationallicence C i/ C a : intercellular CO2 to ambient CO2 concentration ratio nationallicence E : transpiration rate nationallicence g s : stomatal conductance nationallicence MDA : malondialdehyde nationallicence P N : net photosynthesis nationallicence POD : peroxidase nationallicence RWC : relative water content nationallicence ROS : reactive oxygen species nationallicence SOD : superoxide dismutase nationallicence SS : salt-sensitive cultivar nationallicence ST : salt-tolerant cultivar nationallicence WUE : water-use efficiency nationallicence WUEi : intrinsic water-use efficiency nationallicence Huang C. Institute of Ramie, Hunan Agricultural University, Changsha, China aut Wei G. Dazhou Institute of Agricultural Sciences, Sichuan, China aut Jie Y. Institute of Ramie, Hunan Agricultural University, Changsha, China aut Xu J. Dazhou Institute of Agricultural Sciences, Sichuan, China aut Zhao S. Dazhou Institute of Agricultural Sciences, Sichuan, China aut Wang L. College of Agronomy and Biotechnology, Southwest University, Chongqing, China aut Anjum S. College of Agronomy and Biotechnology, Southwest University, Chongqing, China aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/3(2015-09-01), 455-463 0300-3604 53:3<455 2015 53 11099 https://doi.org/10.1007/s11099-015-0127-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11099-015-0127-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Huang C. Institute of Ramie, Hunan Agricultural University, Changsha, China aut NATIONALLICENCE 700 1- Wei G. Dazhou Institute of Agricultural Sciences, Sichuan, China aut NATIONALLICENCE 700 1- Jie Y. Institute of Ramie, Hunan Agricultural University, Changsha, China aut NATIONALLICENCE 700 1- Xu J. Dazhou Institute of Agricultural Sciences, Sichuan, China aut NATIONALLICENCE 700 1- Zhao S. Dazhou Institute of Agricultural Sciences, Sichuan, China aut NATIONALLICENCE 700 1- Wang L. College of Agronomy and Biotechnology, Southwest University, Chongqing, China aut NATIONALLICENCE 700 1- Anjum S. College of Agronomy and Biotechnology, Southwest University, Chongqing, China aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/3(2015-09-01), 455-463 0300-3604 53:3<455 2015 53 11099