Moisture Induced Changes in Root Attributes and Selection Indices for Drought Tolerance in Desi, Kabuli and Wild Chickpea Accessions
2021
Johal, Norah | Kaur, Jagmeet | Singh, Sarvjeet | Pal, Mamta
Root traits i.e. root length (RL), root weight (RW) and root area (RA) and root indices i.e. root length density (RLD) and root:shoot ratio (RSR) were evaluated in leaves of desi, kabuli and wild chickpea accessions at 70 DAS under receding moisture conditions (control, 50% and 75% reduction). The tolerance of desi genotypes was recorded to be significantly higher than kabuli and wild accessions. Check desi genotype PBG 7 was observed to be tolerant to moisture stress with 13.15% and 34.04% decline in root length density as well as root length under 50% moisture reduction conditions respectively. However, wild accessions sustained low stress injuries in terms of low membrane permeability index (MPI) (12.76 and 28.46%) and less decline in cellular respiration (26.06 and 43.23%) highlighting their resistance at 50 and 75% moisture reduction respectively. The tolerance capacity of the desi genotypes was attributed to high root area that contributed directly to root length density (P=0.89) and was instrumental in maintaining yield stability.
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