ABSTRACT
The leaves of cotton cultivars Qalandri, MNH-93, Rehmani and S-12 were stressed for 2 h at 30 (control), 35, 38, 40, 42, 43, 44, 45 and 46°C to quantify the damage caused to chloroplast photosynthetic apparatus by chlorophyll fluorescence technique. There was 10-30% decrease in Fv/Fm ratio up to the temperature stress of 40°C. But at 44°C the cultivars showed considerably higher damage to photosynthesis process by recovering only 10, 13, 37 and 50% of the Fv/Fm ratio by the cultivars MNH-93, Qalandri, Rehmani and S-12 respectively.
PDF References Citation
How to cite this article
M. A. Sethar, V. Mala Pahoja, Q. I. Chachar and D. L. Laidman, 2001. Impact of Optimal and Superoptimal Temperatures on the Photosynthetic Apparatus of Cotton Leaves. Journal of Biological Sciences, 1: 1088-1092.
DOI: 10.3923/jbs.2001.1088.1092
URL: https://scialert.net/abstract/?doi=jbs.2001.1088.1092
DOI: 10.3923/jbs.2001.1088.1092
URL: https://scialert.net/abstract/?doi=jbs.2001.1088.1092
REFERENCES
- Nahar, B.S. and T. Ikeda, 2001. Effect of different soil water levels on production and abscission of reproductive organs of soybean under high temperature. Pak. J. Biol. Sci., 4: 301-308.
CrossRefDirect Link - Havaux, M., M. Ernez and R. Lannoye, 1988. Correlation between heat tolerance and drought tolerance in cereals demonstrated by rapid chlorophyll fluorescence tests. J. Plant Physiol., 133: 355-360.
Direct Link - Hetherington, S.E., R.M. Smillie, P. Malgamba and Z. Huaman, 1983. Heat tolerance of cultivated potatoes measured by chlorophyll fluorescence method. Planta, 159: 119-124.
CrossRefDirect Link - Keerio, M.I., 2001. Nitrogenase activity of soybean root nodules inhibited after heat stress. J. Applied Sci., 1: 297-300.
CrossRefDirect Link - Larcher, W., J. Wagner and A. Thammathaworn, 1990. Effect of superimposed temperature stress on in vivo chlorophyll fluorescence of Vigna unguiculata under saline stress. J. Plant Physiol., 136: 92-102.
Direct Link - Mukohata, Y., T. Yagi, M. Higashida, K. Shinozaki and A. Matsuno, 1973. Biophysical studies on subcellular particles. IV. Photosynthetic activities in isolated spinach chloroplasts after transient warming. Plant Cell Physiol., 14: 111-118.
Direct Link - Potvin, C., 1985. Effects of leaf detachment on chlorophyll fluorescence during chilling experiments. Plant Physiol., 78: 883-883.
Direct Link - Santarius, K.A. and M. Muller, 1979. Investigations on heat resistance on spinach leaves. Planta, 146: 529-538.
CrossRefDirect Link - Schreiber, U. and J.A. Berry, 1977. Heat-induced changes of chlorophyll fluorescence in intact leaves correlated with damages of photosynthetic apparatus. Planta, 136: 233-238.
CrossRefDirect Link - Schreiber, U. and P.A. Armond, 1978. Heat induced changes of chlorophyll fluorescence in isolated chloroplasts and related heat-damage at the pigment level. Biochem. Biophys. Acta, 502: 138-151.
PubMedDirect Link - Simillie, R.M. and G.C. Gibbons, 1981. Heat tolerance and heat hardening in crop plants measured by chlorophyll fluorescence. Carlsberg Res. Commun., 46: 309-403.
CrossRefDirect Link - Wolf, S., D. Yakir, M.A. Stevens and J. Rudich, 1986. Cold temperature tolerance of wild tomato species. J. Am. Soc. Hortic. Sci., 111: 960-964.
Direct Link