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Diversity of Sodium Transporter HKT1;5 in Genus Oryza

Rice science 2022年第1期29卷 31-46,I0002-I0017页

作者： Shalini PULIPATI suji somasundaram Nitika RANA Kavitha KUMARESAN Mohamed SHAFI Peter CIVÁŇ Gothandapani SELLAMUTHU Deepa JAGANATHAN Prasanna Venkatesan RAMARAVI S.PUNITHA Kalaimani RAJU Shrikant S.MANTRI R.SOWDHAMINI Ajay PARIDA Gayatri VENKATARAMAN M.S.Swaminathan Research Foundation Chennai 600113India National Agri-Food Biotechnology Institute Punjab 140306India Krishi Vigyan Kendra Kanyakumari 629901India National Centre for Biological Sciences/Tata Institute of Fundamental Research Bangalore 560065India National Research Institute for Agriculture Food and Environment UniversityClermont-AuvergneClermont-Ferrand 63000France Forest Molecular Entomology Laboratory Faculty of Forestry and Wood SciencesCzech University of Life SciencesPraguePraha 16500Czech Republic Tamil Nadu Agricultural University Coimbatore 641003India International Business Machines India Chennai 600125India Institute of Life Sciences Bhubaneswar 751023India

Asian cultivated rice shows allelic variation in sodium transporter,OsHKT1;5,correlating with shoot sodium exclusion(salinity tolerance).These changes map to intra/extracellularly-oriented loops that occur between four transmembrane-P loop-transmembrane(MPM)motifs in OsHKT1;***1;5 sequences from more recently evolved Oryza species(***/*** complex species)contain two expansions that involve two intracellularly oriented loops/helical regions between MPM domains,potentially governing transport characteristics,while more ancestral HKT1;5 sequences have shorter intracellular *** compared homology models for homoeologous OcHKT 1;5-K and OcHKT1;5-L from halophytic *** to identify complementary amino acid residues in OcHKT1;5-L that potentially enhance affinity for Na+.Using haplotyping,we showed that Asian cultivated rice accessions only have a fraction of HKT1;5 diversity available in progenitor wild rice species(*** and ***).Progenitor HKT1;5 haplotypes can thus be used as novel potential donors for enhancing cultivated rice salinity *** Asian rice accessions,10 non-synonymous HKT1;5 haplotypic groups *** HKT1;5 haplotypic diversities occur in cultivated indica gene pool compared to *** Haplotypes 2 and 10 occur in mutually exclusive japonica and indica groups,corresponding to haplotypes in *** salt-sensitive and salt-tolerant landraces,*** distinct haplotype partitioning may have originated in separate ancestral gene pools of indica and japonica,or from different haplotypes selected during *** of specific HKT1;5 haplotypes within the 3000 rice dataset may relate to eco-physiological fitness in specific geo-climatic and/or edaphic contexts.

关键词： HKT1 5 diversity single nucleotide polymorphism haplotype bacterial artificial chromosome salinity tolerance sodium transporter Oryza species

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