Multi-responses of O-methyltransferase genes to salt stress and fiber development of Gossypium species

Abstract Background O-methyltransferases (OMTs) are an important group of enzymes that catalyze the transfer a methyl from S-adenosyl-L-methionine to their acceptor substrates. OMTs divided into several groups according structural features. In Gossypium species, they involved in phenolics and flavonoid pathways. Phenolics defend cellulose fiber dreadful external conditions biotic abiotic stresses, promoting strength growth plant cell wall. Results An OMT gene family, containing total 192 members, has been identified characterized three main G. hirsutum , arboreum G . raimondii Cis-regulatory elements analysis suggested roles genes growth, development, defense against stresses. Transcriptome data different developmental stages Chromosome Substitution Segment Lines (CSSLs), Recombination Inbred (RILs) with excellent quality, standard genetic cotton cultivar TM-1 demonstrate up-regulation at stages, stress treatments have some significant correlations quality formation, salt response. Quantitative RT-PCR results revealed GhOMT10_Dt GhOMT70_At had specific expression response while GhOMT49_At GhOMT49_Dt GhOMT48_At elongation secondary wall stages. Conclusions Our indicate O-methyltransferase multi-responses development species may contribute tolerance or formation