Infra Red Thermography Reveals Transpirational Cooling in Pearl Millet (Pennisetum glaucum) Plants Under Heat Stress

Abstract

Abstract An infra red thermographic analysis of well watered control and well watered heat stressed pearl millet ( Pennisetum glaucum ) was conducted at ICAR – Central Research Institute for Dryland Agriculture as a part of high resolution phenomics studies to identify the individual quantitative physiological parameters by plant phenotyping that form the basis for more complex abiotic stress tolerant traits. It was seen that the temperature gradient increased gradually from ground level to the top in the control non heat stressed plant. In contrast, it was seen that in the heat stressed plant the temperature increased up to the middle of the plant and then started to decrease at the top of the plant in comparison with the non heat stressed control plant. Our results indicate that the lowering of temperatures in the top of the heat stressed plant may be a mechanism by which the heat stressed plant acclimates to stress by regulating its transpiration thereby bringing in a cooling effect to counter stress.

Plant phenotyping relevance

赤外線サーモグラフィーによる植物温度・温度勾配の取得を、植物フェノタイピングおよび生理形質の定量化として明示的に扱っており、手法の適用が中心です。

Code and data availability

The preprint describes thermal imaging (FLIR E-95) and soil moisture measurements of pearl millet under heat stress, but contains no data availability statement, no public dataset or image deposit, and no author code or workflow with a public URL. The only URLs present are the bioRxiv DOI and the corresponding author's

No evidence-backed public reproduction asset is currently recorded.