Adaptations of plant responses in Agave sisalana under drought stress conditions

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Research Paper 01/10/2016
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Adaptations of plant responses in Agave sisalana under drought stress conditions

Sania Riaz, Beenish Aftab, Muhammad Bilal Sarwar, Fatima Batool, Fozia Iqbal, Zarnab Ahmad, Bushra Rashid, Tayyab Husnain
J. Bio. Env. Sci.9( 4), 114-123, October 2016.
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Abstract

This study was aimed to characterize the drought tolerance at 10 and 2% field capacity in a desert plant Agave sisalana during a period of 2 months. Physiological, biochemical and water related attributes were investigated in order to explore agave plant’s survival under water stressed conditions. Green house experiment was performed in CRD with four replications of drought stress imposed on six months old progeny of agave plants. Drought stress significantly decreased the photosynthetic rate (1.45 µmol m-2 s-1), transpiration rate (0.15 mmol m-2 s-1), stomatal conductance (0.9 µmol m-2 s-1), leaf area (12.9 cm2), relative water content (30.7%) and total chlorophyll content (0.24 mg g-1). The concentration of biochemical indicators such as proline (4.26 µg g-l) and Melondialdehyde (0.99 µmol g-1 FW) were increased by the increase in drought stress time from 10 to 2% field capacity. The correlation coefficients (r) between physiological, biochemical and water related traits were also found to be significant and showed positive and negative association among each other. This knowledge of stress inducible responses generated in the form of physiochemical attributes in water deficit crops can serve to be very useful in the future for better understanding of metabolic and gene regulatory pathways.

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