Journal of Food, Agriculture and Environment

Vol 1, Issue 3&4,2003
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Reproductive physiology of two wheat cultivars differing in salinity tolerance under dense saline-sodic soil


Mushtaq Ahmad Khan, Zaibunnisa Abdullah *

Recieved Date: 2002-10-17, Accepted Date: 2003-08-28


We examined the agro-physiological parameters in two wheat cultivars namely, Faisalabad-85 (sensitive to salinity alone) and LU-26-S (tolerant to salinity alone) at reproductive phase grown under dense saline-sodic soil. Our results showed that there was non-significant effect of salinity-sodicity on chlorophyll a and b concentration and leaf area of both the cultivars. CO2 assimilation was reduced significantly (P<0.001) in LU-26-S, showing nonsignificant effect in Faisalabad-85. Highly significant (P<0.001) increase in Na+ and significant ( P<0.01 and P<0.05) reduction in K+ concentration was found in flag leaves of both the cultivars. Pollen viability was reduced 37 % in Faisalabad-85 and 24 % reduction was observed in LU-26-S. Carbohydrate mobilization at the time of anthesis showed significant increase (P<0.01) in spikelets of LU-26-S, whereas it was reduced significantly (P<0.001) at grain filling stage. In Faisalabad-85 no change was observed in carbohydrate concentration of spikelets, ear stalk at anthesis stage but showed significant increase in spikelets and ear stalk (lower) at grainfill stage .Starch synthase activity (α-1-4 glucan-glucosyle transferases, EC was reduced significantly (P<0.001) in developing grains of LU-26-S showing non-significant effect in Faisalabad-85. More seed numbers/plant and less 1000 seed weight was observed in LU-26-S compared to Faisalabad-85 ,where as grain yield was more in later than the former. In present study Faisalabad-85 proved better than LU-26-S under saline sodic soils in terms of mobilization of soluble carbohydrates in different floral parts (especially in spikelets), non-significant effect of salinity-sodicity on starch synthase activity in developing grains and 1000 seed weight, thus resulting in higher grain yield.


Carbohydrate, CO2 assimilation, leaf area, pollen viability, starch synthase activity, grain filling

Journal: Journal of Food, Agriculture and Environment
Year: 2003
Volume: 1
Issue: 3&4
Category: Agriculture
Pages: 185-189

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