Physiological and biochemical adaptations in lentil genotypes under drought stress

摘要: Drought is a major restrictive factor for declining grain yield in lentil globally. Present investigation was conducted by taking microsperma (HUL-57) and macrosperma (IPL-406) genotypes of (Lens culinaris Medik.) as information regarding physiological biochemical basis differences drought resistance (bold-seeded) (small-seeded) are not well understood. Pot grown plants were exposed to stress at specific phenophase viz. mid-vegetative, flower initiation pod formation stage withholding irrigation till the experienced one cycle permanent wilting (PWP). Genotypes exhibited substantial most measured traits under irrespective imposed. Under HUL-57 had lower CMI, higher CSI, values Δ13C, maintained SLN, accumulated more N efficiently remobilized developing seeds. Higher chlorophyll content, increased accumulation osmotically active solutes soluble sugars proline evident HUL-57. induced H2O2 lipid peroxidation both genotypes, but increments lesser magnitudes followed damaging than imposed mid-vegetative genotypes. showed better capacity IPL-406. indices DSI, STI MP proposed criterion identify breed conditions.