EFFECTS OF HEAT SHOCK ON LEAF CHLOROPHYLL FLUORESCENCE IN COTTON CULTIV ARS

Authors

  • M. A. SETHAR Department Physiology and Biochemistry, Sindh Agriculture University, Tandojam, Pakistan
  • D. L. LAIDMAN Department Physiology and Biochemistry, Sindh Agriculture University, Tandojam, Pakistan
  • J. M. WILSON Department Physiology and Biochemistry, Sindh Agriculture University, Tandojam, Pakistan
  • R. B. MIRBAIIAR Department Physiology and Biochemistry, Sindh Agriculture University, Tandojam, Pakistan

Keywords:

Chlorophyll fluorescence, Photosynthesis, Heat shock, Cotton cultivars.

Abstract

Four cotton cultivars viz. Qalandari, MNH-93, Rchrnani and S-12 were analysed for their leaf chlorophyll
fluorescence properties, at normal growth temperature (30°) (control), and shocked at high temperature (45°) for different
time periods. There were only small variations in the values of chlorophyll fluorescence at the control temperature.
However, the photosystem of the leaves was irreversibly damaged as assessed by fluorescence properties when the
leaves were shocked at 45° for 30 mins or longer. All the cultivars were equally sensitive to the treatment.

Published

2022-06-09

How to Cite

SETHAR, M. A. ., LAIDMAN , . D. L. ., WILSON, . . . J. M. ., & MIRBAIIAR , . . R. B. . (2022). EFFECTS OF HEAT SHOCK ON LEAF CHLOROPHYLL FLUORESCENCE IN COTTON CULTIV ARS. Biological Sciences - PJSIR, 37(6-7), 273–276. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/2685

Issue

Vol. 37 No. 6-7 (1994): Pakistan Journal of Scientific and Industrial Research

Section

Articles