Volume : II, Issue : III, March - 2013

Temperature, Vapour Pressure Deficit and Water Stress Interaction on Transpiration in Wheat

Santosh Kumari, H. M. Rawson

Abstract :

Hartog, semi dwarf spring wheat with little response to vernalisation and photoperiod, was grown in naturally lit glasshouses with two temperature regimes of 30/25oC and 21/ 16oC from sowing to flag leaf ligule emergence. The plants were subjected to two water regimes of well watered and limited water supply. At flag leaf ligule emergence these plants were transferred to a growth cabinet maintained at high temperature (35/ 20oC) to study the rate of water loss. The most visible effect of temperature and water stress was the reduction in leaf area before flag leaf ligule emergence. In growth cabinet, after flag leaf ligule emergence pots with two plants lost water more quickly than those with one plant after exposure to high temperature (35/20oC), suggesting that leaf area plays a primary role in rate of water loss. Pre–treatments of high temperature and water stress at low temperature reduced the degree of damage during later period of high temperature. High temperature was associated with increase in vapor pressure deficit which governed the rate of transpiration.

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Santosh Kumari, H. M. Rawson Temperature, Vapour Pressure Deficit and Water Stress Interaction on Transpiration in Wheat International Journal of Scientific Research, Vol.II, Issue.III March 2013

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