|
Pak. J. Bot., 45(6): 1925-1932, 2013. |
Back to Contents | ||||
|
|
Updated: 12-11-13 | ||||
|
|
STOMATAL AND CHLOROPHYLL LIMITATIONS OF WHEAT CULTIVARS SUBJECTED TO WATER STRESS AT BOOTING AND ANTHESIS STAGES
ABDUL AZIZ KHAKWANI1*, M.D. DENNETT2, NAQIB ULLAH KHAN3, M. MUNIR4, M.J. BALOCH5, ASIF LATIF1 AND SAMRIN GUL3
Abstract: The stomatal and chlorophyll effects were determined on yield and its contributing traits of wheat cultivars (Damani, Hashim-8, Gomal-8, DN-73, Zam-04 and Dera-98) under stress conditions at booting and after anthesis stages during 2009 at the University of Reading, UK. Significant water stress effects were observed on chlorophyll fluorescence, chlorophyll content, stomatal conductance, leaf area, relative water content (RWC %) and grain yield per plant. All the cultivars behaved independently and significantly different for physiological and yield traits. Cultivars Hashim-8, Zam-04 and Damani were observed as best candidate genotypes for rain-fed regions, and minimum effect and percent reduction was recorded at their booting and after anthesis stages for all traits at stress conditions. These rain-fed cultivars were also persistent at higher level of stomatal conductance and RWC % even under water stress condition, which reflects their adaptability under drought environment.
1Department of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan - Pakistan 2School of Biological Sciences, University of Reading, UK. 3Department of Plant Breeding and Genetics, The University of Agriculture, Peshawar - Pakistan 4Frontier Agriculture, SOYL Precision Crop Production Division, Newbury, UK. 5Department of Plant Breeding and Genetics, Sindh Agriculture University, Tandojam - Pakistan *Corresponding author’s email: azizkhakwani2002pk@yahoo.com |
||||
|
|
|||||
| Back to Contents |
|
Back to Contents | |||
|
|
|||||