Effects of exogenous chitosan concentrations on photosynthesis and functional physiological traits of hibiscus under salt stress.

ABSTRACT:

Background

Soil salinity is a major barrier to plant growth and yield improvement. Chitosan, a versatile biomaterial, has shown potential in enhancing plant stress tolerance. This study evaluated the effectiveness of chitosan pretreatment in mitigating salt stress hibiscus (Hibiscus syriacus L.). Two-year-old hibiscus cuttings were treated with varying concentrations of chitosan (10 mg/L, 25 mg/L, 50 mg/L, 100 mg/L) via root irrigation and foliar spray in a 6‰ saline environment. Growth parameters, gas exchange rates, antioxidant enzyme activities, and osmotic regulatory compounds were analyzed.

Results

The results showed that chitosan at 25 mg/L and 50 mg/L significantly improved physiological and ecological traits. These concentrations enhanced photosynthetic performance,

SUBMITTER: Cao Y 

PROVIDER: S-EPMC11967025 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature