Hi Okon,
The reduction of leaf area, under stress conditions, could be explained by an adaptive morphological strategy, that of limiting water loss through transpiration. also, it could result from the slowing of cell growth of young leaves
Dear Okon Okon,
Please follow the below given link and PDF attachment for the answer to your query.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5218372/
Good luck!
Sure, to decrease leave temperature and then water lose through leaves
Reduction in leaf area of plants is a typical response to salt stress. In fact decreased leaf growth is the earliest response of glycophytes exposed to salt stress. The reduction in leaf area may be considered as an avoidance mechanism, which minimizes water loss by transpiration when the stomata are closed. This effect favours the retention of toxic ions in roots, limiting the accumulation of these ions in the leaves of plants. Under saline conditions cell wall properties change and leaf turgor and photosynthesis rates decrease, leading to a reduction in total leaf area.
Salinity stress affects cell expansion in young leaves, causing a decrease in leaf area. So, reduction in LA as a result of water stress is attributed to reduced leaf initiation, leaf growth rate and leaf size. When subjected to salinity stress, crop water loss is reduced through reduction of total leaf area (LA).
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