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Publication Type J
Authors Yu, JJ; Sun, LH; Fan, NL; Yang, ZM; Huang, BR
Author Full Name Yu, Jingjin; Sun, Lihong; Fan, Ningli; Yang, Zhimin; Huang, Bingru
Title Physiological factors involved in positive effects of elevated carbon dioxide concentration on Bermudagrass tolerance to salinity stress
Source ENVIRONMENTAL AND EXPERIMENTAL BOTANY
Language English
Document Type Article
Author Keywords Cynodon dactylon; Osmotic adjustment; Glycine betaine; Carbohydrate
Keywords Plus ATMOSPHERIC CO2 CONCENTRATION; SALT-STRESS; HEAT-STRESS; TALL FESCUE; SUAEDA-MARITIMA; WATER RELATIONS; BARLEY PLANTS; PHOTOSYNTHESIS; GROWTH; DROUGHT
Abstract Salinity stress due to increased use of non-potable water sources for irrigation imposes major limitations on plant growth in salt-affected soils. However, rising atmospheric CO2 concentration may counteract the negative effects of salinity stress. The objective of this study was to determine whether elevated CO2 mitigates salinity stress by influencing physiological activities and/or ion (Na+ and K+) balance in Bermudagrass (Cynodon dactylon cv. 'Tifway'). Plants were exposed to either ambient CO2 concentration (400 mu mol mol(-1)) or elevated CO2 concentration (800 mu mol mol(-1)) and maintained well-watered (control) with fresh water or subjected to salinity stress by irrigating plants with NaCl solution (200 mM). Salinity stress caused reduction in turf quality (TQ), leaf relative water content (RWC), leaf net photosynthetic rate (P-n), transpiration rate, stomatal conductance, and cellular membrane stability. Elevated CO2 concentration alleviated the depression of those physiological parameters and promoted osmotic adjustment through accumulation of soluble sugars, proline, and glycine betaine (GB) under salinity stress, but had no significant effects on the ratio of Na+ to K+. Our results demonstrated that elevated CO2 concentration was effective in alleviating physiological damages of salinity stress in Bermudagrass, suggesting that C-4 grasses may benefit from the rising atmospheric CO2 concentration associated with global climate changes. The positive physiological effects of elevated CO2, as manifested by improved TQ, RWC, P-n and cell membrane stability could be related to the maintenance of cellular hydration associated with osmotic adjustment due to the accumulation of soluble sugars, proline and GB, and the suppression of Na+ accumulation independent of changes in K+ accumulation. (C) 2015 Elsevier B.V. All rights reserved.
Author Address [Yu, Jingjin; Sun, Lihong; Fan, Ningli; Yang, Zhimin] Nanjing Agr Univ, Coll Agrograssland Sci, Nanjing 210095, Jiangsu, Peoples R China; [Huang, Bingru] Rutgers State Univ, Dept Plant Biol & Pathol, New Brunswick, NJ 08901 USA
Reprint Address Yu, JJ (reprint author), Nanjing Agr Univ, Coll Agrograssland Sci, Nanjing 210095, Jiangsu, Peoples R China.
E-mail Address jingjin_yu@126.com; huang@aesop.rutgers.edu
Funding Agency and Grant Number China National Science Foundation [31301799]; China Postdoctoral Science Foundation [2014M551612]; Youth Technology Innovation Project from Nanjing Agricultural University [KJ2013021]; Jiangsu Postdoctoral Science Foundation [1302018B]
Funding Text The authors thank the China National Science Foundation (31301799) for providing support. Thanks also go to the China Postdoctoral Science Foundation (2014M551612), Youth Technology Innovation Project from Nanjing Agricultural University (KJ2013021), and the Jiangsu Postdoctoral Science Foundation (1302018B).
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Cited Reference Count 48
Times Cited 2
Total Times Cited Count (WoS, BCI, and CSCD) 2
Publisher PERGAMON-ELSEVIER SCIENCE LTD
Publisher City OXFORD
Publisher Address THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN 0098-8472
29-Character Source Abbreviation ENVIRON EXP BOT
ISO Source Abbreviation Environ. Exp. Bot.
Publication Date JUL
Year Published 2015
Volume 115
Beginning Page 20
Ending Page 27
Digital Object Identifier (DOI) 10.1016/j.envexpbot.2015.02.003
Page Count 8
Web of Science Category Plant Sciences; Environmental Sciences
Subject Category Plant Sciences; Environmental Sciences & Ecology
Document Delivery Number CG2FB
Unique Article Identifier WOS:000353089200003
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