Natural variations of chlorophyll fluorescence and ion transporter genes influenced the differential response of rice germplasm with different salt tolerances.

Soil salinity seriously restricts rice growth, development, and production globally. Chlorophyll fluorescence and ion content reflect the level of injury and resistance of rice under salt stress. To understand the differences in the response mechanisms of rice with varying degrees of salt tolerance, we analyzed the chlorophyll fluorescence characteristics and ion homeostasis of 12 rice germplasm accessions by comprehensive evaluation of phenotype, haplotype, and expression of salt tolerance-related genes.