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| DOI: | 10.2135/cropsci2012.05.0284 |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/cs/articles/53/1/221
Last checked: 11/07/2016
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| Publication Type:
| Refereed |
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| Author(s): | Hu, Longxing;
Wang, Zhaolong;
Huang, Bingru |
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| Author Affiliation: | Hu and Wang: College of Agricultural and Biological Science, Shanghai Jiao Tong Univ., People's Republic of China; Huang: Dep. of Plant Biology and Pathology, Rutgers Univ., New Brunswick, NJ |
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| Title: | Effects of cytokinin and potassium on stomatal and photosynthetic recovery of Kentucky bluegrass from drought stress |
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| Section: | Crop physiology & metabolism
Other records with the "Crop physiology & metabolism" Section
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| Source: | Crop Science. Vol. 53, No. 1, January 2013, p. 221-231. |
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| Publishing Information: | Madison, Wisconsin: Crop Science Society of America |
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| # of Pages: | 11 |
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| Related Web URL: | https://dl.sciencesocieties.org/publications/cs/abstracts/53/1/221
Last checked: 11/07/2016
Notes: Abstract only
https://dl.sciencesocieties.org/publications/cs/articles/53/1/221?show-t-f=figures&wrapper=no
Last checked: 11/07/2016
Notes: Figures only |
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| Keywords: | TIC Keywords: Cultural methods; Cytokinins; Drought stress; Photosynthesis; Poa pratensis; Relative water content; Stomatal movement
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| Abstract/Contents: | "Drought-induced stomatal closure may limit resumption of photosynthesis and plant growth if stomata do not quickly reopened when plants are later rehydrated. Cytokinins (CK) and K are known to regulate stomatal opening and closure. The objective of this study was to investigate whether foliar application of CK and K would enhance stomatal reopening and photosynthetic recovery in leaves of perennial grass after water deficit is alleviated. Kentucky bluegrass (Poa pratensis L. Brilliant) plants were subjected to drought stress by withholding irrigation for 15 d and then rewatered for 6 d in growth chambers. A synthetic CK (6-benzylaminopurine [6-BA]) and KCl with the concentration of 10 μM and 50 mM, respectively, were foliar sprayed on drought-stressed plants. The experiment consisted of well-watered control, drought stress followed by rewatering, drought stress followed by rewatering and foliar spray of 6-BA (10 μM), and drought stress followed by rewatering and foliar spray of KCl (50 mM). Treatments were arranged as a completely randomized block design with four replicates for each treatment. Soil volumetric water content (SWC), leaf relative water content (RWC), net photosynthetic rate (Pn), stomatal conductance (gs), transpiration rate (Tr), and stomatal aperture decreased with the progression of drought stress. The RWC, Pn, gs, Tr, and stomatal aperture increased after rewatering, to a greater extent in 6-BA- or KCl-treated plants than plants sprayed with water only. A positive correlation between stomatal aperture and Pn (r2 = 0.79) and between stomatal aperture and gs (r2 = 0.87) were detected under drought stress and during rewatering. Our results indicate that exogenous application of 6-BA and KCl promoted stomatal reopening following drought-induced closure, leading to enhanced gs and rapid postdrought resumption of photosynthesis on rewatering." |
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| Language: | English |
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| References: | 56 |
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| See Also: | Other items relating to: Breeding for Drought |
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| Note: | Pictures, color
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hu, L., Z. Wang, and B. Huang. 2013. Effects of cytokinin and potassium on stomatal and photosynthetic recovery of Kentucky bluegrass from drought stress. Crop Sci. 53(1):p. 221-231. |
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| DOI: 10.2135/cropsci2012.05.0284 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/cs/articles/53/1/221
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/cs/pdfs/53/1/221
Last checked: 11/07/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2211522a |
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