Humic Acid Drought Resistance Mechanism
1. Reduce the opening of plant stoma,to reduce the transpiration,increase the water absorbing force of roots;
2. Increase the activity of protective enzyme, protection film is steady;
3. Reduce the chlorophyll will be destroyed,keep high photosynthetic rate.Fulvic acid can keep down the activity of protease.The chlorophyll break down will be low,it is good for accumulating the photosynthetic product;
4. Accumulate the osmolytes,increase the ability of osmoregulation.In drought time,it will increase the proline,increase the consistency of cytoplasm and permeation pressure,to prevent the excessive dehydration.