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| DOI: | 10.21273/JASHS.132.4.467 |
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| Web URL(s): | https://journals.ashs.org/jashs/view/journals/jashs/132/4/article-p467.xml?rskey=C0D42Q
Last checked: 11/20/2019
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Veerasamy, Mahalaxmi;
He, Yali;
Huang, Bingru |
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| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University, New Brunswick, New Jersey |
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| Title: | Leaf senescence and protein metabolism in creeping bentgrass exposed to heat stress and treated with cytokinins |
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| Section: | Environmental stress physiology
Other records with the "Environmental stress physiology" Section
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| Source: | Journal of The American Society for Horticultural Science. Vol. 132, No. 4, July 2007, p. 467-472. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Zeatin riboside; Chlorophyll; Proteases; Photochemical efficiency; Heat stress; Protein metabolism; Senescence; Cytokinins; Agrostis stolonifera
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| Abstract/Contents: | "Heat stress induces leaf senescence and causes changes in protein metabolism. The objective of this study was to investigate effects of exogenous application of a synthetic form of cytokinin, zeatin riboside (ZR), on protein metabolism associated with leaf senescence under heat stress for a cool-season grass species. Creeping bentgrass (Agrostis stolonifera L.) (cv. Penncross) plants were exposed to optimum temperature control (20/15 °C, day/night) and heat stress (35/30 °C) in growth chambers. Before heat stress treatments, foliage was sprayed with 10 µmol ZR or water (untreated) for 3 days and then once per week during 35 days of heat stress. Leaf chlorophyll content, photochemical efficiency (Fv/Fm), and soluble protein content declined, whereas protease activity increased during heat stress. Treatments with ZR helped maintain higher leaf chlorophyll content, Fv/Fm, and soluble protein content under heat stress. Protease activity in ZR-treated plants was lower than that of untreated plants. Zeatin riboside-treated plants had less severe degradation of ribulose-1,5-bisphosphate carboxylase proteins than untreated plants exposed to heat stress. In addition, ZR treatment upregulated the expression of 32- and 57-kDa proteins under heat stress conditions. These results demonstrated that the exogenous application of ZR ameliorated the negative effects of heat stress, as manifested by suppression or delay of leaf senescence. Cytokinins may have helped to alleviate heat stress injury, probably by slowing down the action of protease and by induction or upregulation of heat-shock proteins." |
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| Language: | English |
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| References: | 57 |
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| See Also: | Other items relating to: Summertime Blues |
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| Note: | Pictures, b/w
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Veerasamy, M., Y. He, and B. Huang. 2007. Leaf senescence and protein metabolism in creeping bentgrass exposed to heat stress and treated with cytokinins. J. Am. Soc. Hortic. Sci. 132(4):p. 467-472. |
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| DOI: 10.21273/JASHS.132.4.467 |
| Web URL(s):
https://journals.ashs.org/jashs/view/journals/jashs/132/4/article-p467.xml?rskey=C0D42Q
Last checked: 11/20/2019
Requires: PDF Reader |
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MSU catalog number: SB 1 .A46 |
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