| |
DOI: | 10.1016/j.envexpbot.2016.01.002 |
Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0098847216300028 Last checked: 03/10/2016 Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Ma, Xiqing;
Zhang, Jing;
Huang, Bingru |
Author Affiliation: | Ma and Zhang: College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, PR China; Zhang and Bingru: Department of Plant Biology and Pathology, Rutgers, The State University of New Jersey, New Brunswick, NJ |
Title: | Cytokinin-mitigation of salt-induced leaf senescence in perennial ryegrass involving the activation of antioxidant systems and ionic balance |
Source: | Environmental and Experimental Botany. Vol. 125, May 2016, p. 1-11. |
Publishing Information: | Elsevier |
# of Pages: | 11 |
Keywords: | TIC Keywords: Antioxidants; Benzyladenine; Cytokinins; Evaluations; Ions; Lolium perenne; Physiological responses; Salt stress
|
Cultivar Names: | Pinnacle |
Abstract/Contents: | "Leaf senescence is one of typical symptoms of salt stress in higher plants. The objectives of this study were to examine whether salt-induced leaf senescence could be alleviated by exogenous cytokinin and to elucidate on the regulatory mechanisms of cytokinin for mitigating salt stress in plants. Perennial ryegrass (Lolium perenne cv. Pinnacle) plants were exogenously treated with 6-benzylaminopurine (25 μM) for 3 d prior to salt stress imposition and every 7 days during salt stress for 28 days (250 mM NaCl) in growth chambers. Physiological indicators of leaf senescence, including visual turfgrass quality, leaf photochemical efficiency, leaf chlorophyll content, electrolyte leakage, malondialdehyde content, percentage of cell death, and reactive oxygen species production rate and content were evaluated. Leaf relative water content was also measured to indicate leaf hydration status. Salt stress caused significant declines in turfgrass quality, leaf photochemical efficiency, leaf chlorophyll content, and leaf relative water content, and significantly increased electrolyte leakage, malondialdehyde content, percentage of cell death, and reactive oxygen species rate and content. 6-benzylaminopurine application alleviated the adverse physiological effects of salt stress, which was associated with reactive oxygen species scavenging by increased activities of superoxide dismutase, catalase, ascorbate peroxidase, monodehydroascorbate reductase, and glutathione reductase and up-regulating gene expression levels for ascorbate peroxidase and glutathione reductase. Salt stress significantly decreased cellular K+/Na+ ratio and 6-benzylaminopurine application suppressed Na+ accumulation to maintain a higher K+/Na+ ratio associated with increased high-affinity K+ transporter expression. The results demonstrate that 6-benzylaminopurine effectively reduced salt-induced cellular damages by suppressing oxidative and ionic stresses in perennial ryegrass." |
Language: | English |
References: | 61 |
Note: | Pictures, color Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Ma, X., J. Zhang, and B. Huang. 2016. Cytokinin-mitigation of salt-induced leaf senescence in perennial ryegrass involving the activation of antioxidant systems and ionic balance. Environ. Exp. Bot. 125:p. 1-11. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=269653 |
| If there are problems with this record, send us feedback about record 269653. |
| Choices for finding the above item: |
| DOI: 10.1016/j.envexpbot.2016.01.002 |
| Web URL(s): http://www.sciencedirect.com/science/article/pii/S0098847216300028 Last checked: 03/10/2016 Access conditions: Item is within a limited-access website |
| MSU catalog number: b4885055 |
| Find from within TIC: Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |