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Canavalia rosea  (bay bean), distributing in coastal areas or islands in tropical and subtropical regions, is an extremophile halophyte with good adaptability to seawater and drought. Late embryogenesis abundant (LEA) proteins typically accumulate in response to various abiotic stresses, including dehydration, salinity, high temperature, and cold, or during the late stage of seed development. Abscisic acid-, stress-, and ripening-induced (ASR) genes are stress and developmentally regulated plant-specific genes. In this study, we reported the first comprehensive survey of the LEA and ASR gene superfamily in  C. rosea . A total of 84  CrLEA s and three  CrASR s were identified in  C. rosea  and classified into nine groups. All CrLEAs and CrASRs harbored the conserved motif for their family proteins. Our results revealed that the  CrLEA  genes were widely distributed in different chromosomes, and all of the  CrLEA / CrASR  genes showed wide expression features in different tissues in  C. rosea  plants. Additionally, we introduced 10 genes from different groups into yeast to assess the functions of the  CrLEA s/ CrASR s. These results contribute to our understanding of  LEA/ASR  genes from halophytes and provide robust candidate genes for functional investigations in plant species adapted to extreme environments.

international journal of molecular sciences

Genome-Wide Analysis of the Late Embryogenesis Abundant (LEA) and Abscisic Acid-, Stress-, and Ripening-Induced (ASR) Gene Superfamily from Canavalia rosea and Their Roles in Salinity/Alkaline and Drought Tolerance