Heat Stress at Reproductive Stage Disrupts Leaf Carbohydrate Metabolism, Impairs Reproductive Function, and Severely Reduces Seed Yield in Lentil

Impact of heat stress during seed filling on seed quality and seed yield in lentil (Lens culinarisMedikus) genotypes

“…35 Heat stress damaged the leaf membranes (as electrolyte leakage) and reduced chlorophyll concentration, PSII function and photosynthesis in both lentil genotypes, which was associated with a significant reduction in leaf water content and stomatal conductance, especially in HS genotypes. Damage to leaf membranes due to heat stress has been reported previously, 18,38 and may be due to direct effects of high temperature such as photo-oxidation of chlorophyll pigments, 39 impaired electron flow, 23,39 inhibition of carbon fixation 13 or to indirect effects such as water loss from the leaves. 40 Membrane damage impairs the production of photo-assimilates in leaves, 19 eventually decreasing their availability and mobilization to developing seeds.…”

“…Lentil ( Lens culinaris Medikus) is a vital cool‐season crop that is highly sensitive to rising temperatures . Lentil requires low temperatures at the time of vegetative growth but warm temperatures to mature; optimum growth occurs from 18–30 °C .…”

“…17 Lentil (Lens culinaris Medikus) is a vital cool-season crop that is highly sensitive to rising temperatures. 18,19 Lentil requires low temperatures at the time of vegetative growth but warm temperatures to mature; optimum growth occurs from 18-30 ∘ C. 20,21 Lentil is also grown in relatively warmer regions in various parts of India and Australia, where the crop is exposed to supra-optimal temperatures at the time of seed filling that reduce its yield potential. 18,19,22,23 Moreover, chilling periods are becoming shorter and heat periods are becoming longer in northern parts of India and elsewhere in the world, resulting in the exposure of cool-season crops to heat stress, especially through reproductive and seed-filling stages.…”

Influence of drought and heat stress, applied independently or in combination during seed development, on qualitative and quantitative aspects of seeds of lentil (Lens culinarisMedikus) genotypes, differing in drought sensitivity

“…Cool‐season food legumes are adapted to low and mild temperature environment and hence show high sensitivity to heat stress, as observed in chickpea (Kaushal et al, ) and lentil (Sita et al, ). Our earlier studies have indicated lentil ( L. culinaris Medikus) to be more sensitive than chickpea to high temperature, both at vegetative as well as reproductive stages (Bhandari et al, ; Sita et al, ). The optimum temperatures for lentil growth range from 18 to 30 °C (Sinsawat et al ; Roy, Tarafdar, Das, & Kundagrami, ), with warm temperatures needed for maturity.…”

Integrated “omics” approaches to sustain global productivity of major grain legumes under heat stress

“…culinaris ) decreases beyond 30°C temperature in field condition (Ibrahim, ). Changes occurring in lentil in response to HS involve reduction in photosynthetic function and sucrose synthesis, chlorophyll disruption and damage in cell membrane (Bhandari et al., ). The production loss in lentil is caused by HS through negative effects on vegetative biomass, flower number and pod setting (Bhandari et al., ).…”