Please share your ideas and suggestions regarding that "Exogenous application of melatonin reduces autophagy activity in plants under drought stress conditions". If someone knows the phenomenon regarding this issue please shared with me,. Thanks
I had read one article related to your question. Summarizing that drought stress can activate autophagy pathway in plants to favor their environmental adaptations, however, a direct link between drought and autophagy is still missing.
They identified a plant-unique COST1 (Constitutively Stressed 1) protein that can negatively regulate plant drought tolerance through direct interaction with an autophagy receptor protein ATG8e (autophagy-related 8e).
Here is the link and title. I hope it will help you.
(Links between drought stress and autophagy in plants)