Abstract
Auxin/indoleacetic acid (Aux/IAA) family genes respond to the hormone auxin, which have been implicated in the regulation of multiple biological processes. In this study, all 25 Aux/IAA family genes were identified in Tartary buckwheat (Fagopyrum tataricum) by a reiterative database search and manual annotation. Our study provided comprehensive information of Aux/IAA family genes in buckwheat, including gene structures, chromosome locations, phylogenetic relationships, and expression patterns. Aux/IAA family genes were nonuniformly distributed in the buckwheat chromosomes and divided into seven groups by phylogenetic analysis. Aux/IAA family genes maintained a certain correlation and a certain species-specificity through evolutionary analysis with Arabidopsis and other grain crops. In addition, all Aux/IAA genes showed a complex response pattern under treatment of indole-3-acetic acid (IAA). These results provide valuable reference information for dissecting function and molecular mechanism of Aux/IAA family genes in buckwheat.
Highlights
Tartary buckwheat (Fagopyrum tataricum), named as bitter buckwheat or kuqiao, is an annual eudicot plant belonging to the genus Fagopyrum [1]
A total of 25 genes were identified using Basic Local Alignment Search Tool (BLAST) methods through the conserved sequences generated from the hidden Markov model (HMM) profile in Pfam using the 261 aa conserved sequences of Aux/indole-3-acetic acid (IAA) proteins based on the potential orthologs in Arabidopsis
Among the six auxin-related gene families (Aux/IAA, auxin response factor (ARF), GH3, SUAR, AUX1, and Transport inhibitor response 1 (TIR1)), auxin/indoleacetic acid (Aux/IAA) is very important, representing a class of primary auxin-responsive genes, which are rapidly induced by auxin [57]
Summary
Tartary buckwheat (Fagopyrum tataricum), named as bitter buckwheat or kuqiao, is an annual eudicot plant belonging to the genus Fagopyrum [1]. It is originated in southwest China and currently grown on western China, Japan, South Korea, Canada, and Europe, for exhibits strong abiotic resistance to harsh eco-climatic environments [2, 3]. The study on the mechanism of the important metabolites can effectively promote the use of buckwheat. Studying the resistance mechanism of buckwheat is beneficial to the production of buckwheat under stress and can get meaningful resistance genes for other crops. It is significant to study the response of buckwheat to hormones
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