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Publication Type J
Authors Guan, Q. J., B. W. Tan, T. M. Kelley, J. K. Tian and S. X. Chen
Title Physiological Changes in Mesembryanthemum crystallinum During the C-3 to CAM Transition Induced by Salt Stress
Source Frontiers in Plant Science
Author Keywords Mesembryanthemum crystallinum salt stress photosynthesis and photorespiration C-3 to CAM transition physiology crassulacean acid metabolism abiotic stress evolution responses salinity photosynthesis accumulation constraints succulence tolerance
Abstract Salt stress impedes plant growth and development, and leads to yield loss. Recently, a halophyte species Mesembryanthemum crystallinum has become a model to study plant photosynthetic responses to salt stress. It has an adaptive mechanism of shifting from C-3 photosynthesis to crassulacean acid metabolism (CAM) photosynthesis under stresses, which greatly enhances water usage efficiency and stress tolerance. In this study, we focused on investigating the morphological and physiological changes [e.g., leaf area, stomatal movement behavior, gas exchange, leaf succulence, and relative water content (RWC)] of M. crystallinum during the C-3 to CAM photosynthetic transition under salt stress. Our results showed that in M. crystallinum seedlings, CAM photosynthesis was initiated after 6 days of salt treatment, the transition takes place within a 3-day period, and plants became mostly CAM in 2 weeks. This result defined the transition period of a facultative CAM plant, laid a foundation for future studies on identifying the molecular switches responsible for the transition from C-3 to CAM, and contributed to the ultimate goal of engineering CAM characteristics into C-3 crops.
Author Address [Guan, Qijie; Tian, Jingkui] Zhejiang Univ, Coll Biomed Engn & Instrument Sci, Hangzhou, Peoples R China. [Guan, Qijie; Kelley, Theresa M.; Chen, Sixue] Univ Florida, Dept Biol, Genet Inst, Plant Mol & Cellular Biol Program, Gainesville, FL 32611 USA. [Tan, Bowen] Univ Florida, Dept Biol, Gainesville, FL USA. [Tian, Jingkui] Zhejiang Univ, Coll Biomed Engn & Instrument Sci, Minist Educ, Key Lab Biomed Engn, Hangzhou, Peoples R China. [Tian, Jingkui] Zhejiang Univ, Zhejiang Malaysia Joint Res Ctr Tradit Med, Hangzhou, Peoples R China. [Chen, Sixue] Univ Florida, Interdisciplinary Ctr Biotechnol Res, Prote & Mass Spectrometry, Gainesville, FL 32611 USA. Tian, JK (reprint author), Zhejiang Univ, Coll Biomed Engn & Instrument Sci, Hangzhou, Peoples R China.; Chen, SX (reprint author), Univ Florida, Dept Biol, Genet Inst, Plant Mol & Cellular Biol Program, Gainesville, FL 32611 USA.; Tian, JK (reprint author), Zhejiang Univ, Coll Biomed Engn & Instrument Sci, Minist Educ, Key Lab Biomed Engn, Hangzhou, Peoples R China.; Tian, JK (reprint author), Zhejiang Univ, Zhejiang Malaysia Joint Res Ctr Tradit Med, Hangzhou, Peoples R China.; Chen, SX (reprint author), Univ Florida, Interdisciplinary Ctr Biotechnol Res, Prote & Mass Spectrometry, Gainesville, FL 32611 USA. tjk@zju.edu.cn; schen@ufl.edu
ISSN 1664-462X
ISBN 1664-462X
29-Character Source Abbreviation Front. Plant Sci.
Publication Date Mar
Year Published 2020
Volume 11
Digital Object Identifier (DOI) 10.3389/fpls.2020.00283
Unique Article Identifier WOS:000525543000001
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