Do you think the Na+ or Cl- accumulated in leaf could lead to the leaf abscission?
In high saline condition, what's the major factors trigger the leaf abscission?
I am looking forward to your reply! Thx!
Naturally, in the salinity condition gradual accumulation of salt by root and then leaves can lead to the loss of leaves. But if the salt water in sprinkler irrigation is used, due to the direct absorption of both sodium and chloride ions by leave, serious damage can be inflicted on them resulting in the loss of leaves. However, the weather is hot and dry, this will be tougher.
In general, it should be a form of PCD as an adaptive feature (removing unnecessary salt), not the direct toxic effect of accumulated ions.
Dear Guo Yuan: As per my experience goes with cereal crops like wheat and paddy due to excessive salt accumulation sign of burning of tips and outer line of leaf occurred. These leaves will continue on plants even if complete plant died. Thanx