Differential physiological response in root and leaf of mungbean [Vigna radiata (L) Wilczek] under salinity and drought stress

 
 
International Journal of Biotech Trends and Technology (IJBTT)
 
© 2016 by IJBTT Journal
Volume - 6 Issue - 4                          
Year of Publication : 2016
Authors : Deepen Tamang, S.Yadaw, A.K.Pal
  10.14445/22490183/IJBTT-V19P603

Deepen Tamang, S.Yadaw, A.K.Pal "Differential physiological response in root and leaf of mungbean [Vigna radiata (L) Wilczek] under salinity and drought stress", International Journal of Biotech Trends and Technology (IJBTT), V6(4): 10-13 Oct - Dec 2016. Published by Seventh Sense Research Group.

Abstract

An experiment was conducted in the laboratories of Plant Physiology, Bidhan Chandra Krishi Viswavidyalaya of West Bengal, to study the contrasting physiological and biochemical response of root and leaf of mungbean under drought and salinity stress at early seedling growth stage. The drought and salinity stress was imposed using a solutions of 12% polyethylene glycol 6000 (PEG 6000) and 100 mM of NaCl, respectively. It was found that the seedling growth was not up to the mark and had more detrimental effect under salinity stress condition as compared to drought stress condition. The leaf showed much higher (368.892 µ mol g-1) accumulation of osmolytes as compared to root (124.923 µ mol g-1) under both stress treatments. However, the drought stress showed higher activities of ROS scavenging enzymes such as GPOX (118.400 ΔA470 min-1 g -1) and catalase (236.876 µmol H2O2 min-1 g -1) in root than salinity, however SOD (28.970 Unit min-1 g -1) activity higher in leaf. So, the salinity stress was found to be more detrimental than drought stress in causing inhibition of growth of embryonic axis and the emerging seedling in the present experiment.

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Keywords
Drought, Mungbean, Nacl, Polyethylene Glycol, Salinity.