Effect of water stress on growth and antioxidative defence system in Cucumis spp. at seedling stage

LALITA MUNDALIA; UMA JOSHI; SAKSHI RAMPURIA; RAJURAM MEGHWAL; SUSHIL KUMAR; RAMAVTAR SHARMA

doi:10.56093/ijas.v85i5.48434

Authors

LALITA MUNDALIA M Sc Scholar, S K Rajasthan Agricultural University, Bikaner, Rajasthan 334 006
UMA JOSHI Senior Research Fellow, S K Rajasthan Agricultural University, Bikaner, Rajasthan 334 006
SAKSHI RAMPURIA M Sc Scholar, S K Rajasthan Agricultural University, Bikaner, Rajasthan 334 006
RAJURAM MEGHWAL Senior Research Fellow, Plant Biotechnology Centre, S K Rajasthan Agricultural University, Bikaner, Rajasthan 334 006
SUSHIL KUMAR Assistant Professor, Department of Agricultural Biotechnology, Anand Agricultural University, Anand, Gujarat 388 110
RAMAVTAR SHARMA Principal Scientist, Division of Plant Improvement, Propagation and Pest Management, Central Arid Zone Research Institute (CAZRI), Jodhpur, Rajasthan 342 003

https://doi.org/10.56093/ijas.v85i5.48434

Keywords:

Cucumis, Drought, Hydrogen peroxide, Reactive oxygen species

Abstract

Drought or moisture stress is one of the most significant environmental stresses causing huge loss to the agriculture worldwide, reducing average yield of major vegetables crop by more than 50%. In the current study, antioxidant responses under water stress were compared to detect water stress tolerant genotypes of Cucumis spp. Forty four genotypes of ten Cucumis spp. were evaluated for their respective drought tolerance and effect of water deficient on various morpho-physiological (root length, shoot length, root and shoot fresh and dry weight) and biochemical [Catalase, Ascorbate peroxidase (APOX) and Guiaicol peroxidase GPOX)] parameters. Of these 44 genotypes, 11.36% were tolerant, 29.54% were moderately tolerant and 38.63% were susceptible and 20.45% were highly susceptible. Decrease in root-shoot length, root-shoot fresh weight, root-shoot dry weight was observed in most of the genotypes. The activity of catalase and GPOX was increased in water deficit conditions while the activity of APOX decreased for most of the genotypes. Though none of the growth parameters and enzyme activity was correlated with tolerance level, various morpho-physiological and biochemical parameters, were associated under control and stress conditions.

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