Heat stress has been seen to affect paddy yields in different regions in Bangladesh during the 2021 boro season. In many places, increased sterile spikelet/unfilled grains have been recorded due to the heatwaves and has also been found to have a negative effect on yield. In this case, how does heat stress affects pollination and its leading effect on rice yield and how can it be overcome? I hope you have a good suggestion!
Thanks for your nice question , Increasing temperature of air the relative humidity decrease resulted the water absorption capacity of air is highly increased. When hot air with low humidity flow on rice field especially during flowering phase of rice plant they absorb the moisture from both anther and stigma in this case stigma lost its viscosity to receive pollen and other hand pollen lost the capability of peg formation for proper fertilization . As whole pollination is failed resulted to sterile grain or chita in inflorescence . If the hot air flow in heading phase high temperature (more than 35C ) accelerate the antithesis process before stigma maturity , immature stigma can not receive pollen. In this case pollination does not occur and grain become chita .
Hi Khairul,
Please look at these articles; I hope they are of help for you. Best regards,
Noemi
Dear Noushad and Noemi,
Nice to have your answers to my question. I got your replies.
Thanks.
Khairul
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