Indian Journal of Agricultural Biochemistry

SCOPUS
  • Year: 2015
  • Volume: 28
  • Issue: 2

Variability for Thermo-Tolerance in Response to Membrane Injury Index and Other Physio-Biochemical Parameters of Mustard (Brassica juncea L. Czern and Coss) Genotypes Under Late Sown Condition

1Department of Agricultural Botany, Chaudhary Charan Singh PG College, Heonra, Saifai, Etawah-206130, India

2Department of Crop Physiology, C S Azad University of Agriculture and Technology, Kanpur-208002, India

Abstract

Twenty two advance Indian mustard [Brassica juncea (L.) Czern and Coss.] genotypes were evaluated to assess genotypic variability in physio-biochemical parameters under late sown conditions. On the basis of this study, it was found that genotypes RH-8814, NRCDR-02 and BPR-549-9 recorded maximum values of relative water content (RWC %), chlorophyll stability index (CSI %), chlorophyll content (mg/g f. wt. leaf tissue) and lesser membrane injury index (MII %) over other genotypes at different growth stages. Thus RH-8814, NRCDR-02 and BPR-549-9 indicated their involvement in mechanism of terminal heat tolerance. Genotypes NRCDR-701, NPJ-113, NPJ-117, RGN-773, RGN-197, RH-0116 and DRMR-537-40 recoded a moderate heat tolerance which is preferable under late sown irrigated condition. So they can be used as donors in crossing programs to evolve new mustard genotypes having thermal tolerance.

Keywords

Chlorophyll stability index, chlorophyll content, relative water content, membrane thermo-stability index