Chromosome-scale genome sequence of Suaeda glauca sheds light on salt stress tolerance in halophytes  

作　　者：Yan Cheng Jin Sun Mengwei Jiang Ziqiang Luo Yu Wang Yanhui Liu Weiming Li Bing Hu Chunxing Dong Kangzhuo Ye Zixian Li Fang Deng Lulu Wang Ling Cao Shijiang Cao Chenglang Pan Ping Zheng Sheng Wang Mohammad Aslam Hong Wang Yuan Qin 

机构地区：[1]State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops,College of Plant Protection,Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology,Center for Genomics and Biotechnology,College of Life Science,Fujian Agriculture and Forestry University,Fuzhou 350002,China [2]Pingtan Institute of Science and Technology,Fujian Agriculture and Forestry University,Fuzhou 350400,China [3]Department of Biochemistry,Microbiology and Immunology,University of Saskatchewan,Saskatoon,SK S7N 5E5,Canada [4]College of Agriculture,Fujian Agriculture and Forestry University,Fuzhou 350002,China [5]College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,China [6]Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity,Fuzhou Institute of Oceanography,Minjiang University,Fuzhou 350108,China

出　　处：《Horticulture Research》2023年第9期233-246,共14页园艺研究（英文）

基　　金：supported by the National Natural Science Foundation of China(32170380);the Science and Technology Innovation Project of Pingtan Institute of Science and Technology(PT2021001);the Postdoctoral Foundation of China(2018 M642550).

摘　　要：Soil salinity is a growing concern for global crop production and the sustainable development of humanity.Therefore,it is crucial to comprehend salt tolerance mechanisms and identify salt-tolerance genes to enhance crop tolerance to salt stress.Suaeda glauca,a halophyte species well adapted to the seawater environment,possesses a unique ability to absorb and retain high salt concentrations within its cells,particularly in its leaves,suggesting the presence of a distinct mechanism for salt tolerance.In this study,we performed de novo sequencing of the S.glauca genome.The genome has a size of 1.02 Gb(consisting of two sets of haplotypes)and contains 54761 annotated genes,including alleles and repeats.Comparative genomic analysis revealed a strong synteny between the genomes of S.glauca and Beta vulgaris.Of the S.glauca genome,70.56%comprises repeat sequences,with retroelements being the most abundant.Leveraging the allele-aware assembly of the S.glauca genome,we investigated genome-wide allele-specific expression in the analyzed samples.The results indicated that the diversity in promoter sequences might contribute to consistent allele-specific expression.Moreover,a systematic analysis of the ABCE gene families shed light on the formation of S.glauca’s flower morphology,suggesting that dysfunction of A-class genes is responsible for the absence of petals in S.glauca.Gene family expansion analysis demonstrated significant enrichment of Gene Ontology(GO)terms associated with DNA repair,chromosome stability,DNA demethylation,cation binding,and red/far-red light signaling pathways in the co-expanded gene families of S.glauca and S.aralocaspica,in comparison with glycophytic species within the chenopodium family.Time-course transcriptome analysis under salt treatments revealed detailed responses of S.glauca to salt tolerance,and the enrichment of the transition-upregulated genes in the leaves associated with DNA repair and chromosome stability,lipid biosynthetic process,and isoprenoid metabolic process.Additionally,ge

关 键 词：LIGHT expanded TOLERANCE 

分 类 号：Q943.2[生物学—植物学]