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Are chlorophyll fluorescence and photosynthetic capacity potential physiological determinants of drought tolerance in maize (Zea mays L.)
Ashraf, M; Nawazish, S; Athar, H U R
Pakistan Journal of Botany. 2007;39(4):1123-1131.
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Abstract
In order to assess as to whether traits related to plant photosynthetic capacity such as chlorophyll fluorescence and net CO2 assimilation rate could be used as indicators for drought tolerance in maize, 5 synthetic and 2 hybrids were subjected to PEG-induced water stress for 3 weeks. Although the growth of all maize cultivars was significantly reduced by PEG-induced water stress, they differed significantly in producing shoot biomass under water stress conditions. However, cv. Sahiwal-2002 was higher in growth under water stress conditions. The photosynthetic capacity (A) of all maize cultivars was also reduced under water deficit conditions. Since, there was a positive correlation between biomass production and net CO2 assimilation rate so photosynthetic capacity could be used as a potential selection criterion for drought tolerance in maize. In contrast no such relationship of drought tolerance of the cultivars with photosystem-II efficiency measured as Fv/Fm. Thus, it did not prove to be a viable criterion for drought tolerance in maize.
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39
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4
Start page:
1123
End page:
1131
Total:
9
Pagination:
1123-1131
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- 05563321 (ISSN) Cited By (since 1996): 11 Export Date: 27 March 2012 Source: Scopus Language of Original Document: English Correspondence Address: Ashraf, M.; Department of Botany, University of Agriculture, Faisalabad, Pakistan; email: ashrafbot@yahoo.com References: Akram, N.A., Shahbaz, M., Ashraf, M., Relationship of photosynthetic capacity and proline accumulation with the growth of differently adapted populations of two potential grasses (Cynodon dactylon (L.) Pers. and Cenchrus ciliaris L.) to drought stress (2007) Pak. J. Bot, 39 (3), pp. 777-786; (2003) Government of Pakistan, Ministry of Economic Affairs and Statistics, , Islamabad. Anonymous; Araus, J.L., Slafer, G.A., Reynolds, M.P., Royo, C., Plant breeding and drought in C3 cereals: What to breed for? (2002) Ann. 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Created by:
Athar, Habib-Ur-rehman
Created:
27th March, 2012, 16:03:21
Last modified by:
Athar, Habib-Ur-rehman
Last modified:
20th May, 2013, 20:57:54