Transcriptome Profiling Reveals Molecular Responses to Salt Stress in Common Vetch (Vicia sativa L.)

Author:

Sun Yanmei1,Zhao Na1,Sun Hongjian1,Xu Shan1,Lu Yiwen1,Xi Haojie1,Guo Zhenfei1ORCID,Shi Haifan1

Affiliation:

1. Key Laboratory of State Forestry and Grassland Administration on Grass Germplasm Resources Innovation and Utilization in the Middle and Lower Reaches of the Yangtze River, College of Grassland Science, Nanjing Agricultural University, Nanjing 210095, China

Abstract

Common vetch (Vicia sativa L.) is an important annual diploid leguminous forage. In the present study, transcriptomic profiling in common vetch in response to salt stress was conducted using a salt-tolerant line (460) and a salt-sensitive line (429). The common responses in common vetch and the specific responses associated with salt tolerance in 460 were analyzed. Several KEGG (Kyoto Encyclopedia of Genes and Genomes) pathways, including plant hormone and MAPK (mitogen-activated protein kinase) signaling, galactose metabolism, and phenylpropanoid phenylpropane biosynthesis, were enriched in both lines, though some differentially expressed genes (DEGs) showed distinct expression patterns. The roots in 460 showed higher levels of lignin than in 429. α-linolenic acid metabolism, carotenoid biosynthesis, the photosynthesis-antenna pathway, and starch and sucrose metabolism pathways were specifically enriched in salt-tolerant line 460, with higher levels of accumulated soluble sugars in the leaves. In addition, higher transcript levels of genes involved in ion homeostasis and reactive oxygen species (ROS) scavenging were observed in 460 than in 429 in response to salt stress. The transcriptomic analysis in common vetch in response to salt stress provides useful clues for further investigations on salt tolerance mechanism in the future.

Funder

National Key Research and Development Program of China

Agriculture Research System of China

Fundamental Research Funds for the Central Universities

Publisher

MDPI AG

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