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Genome-wide identification and expression analysis of the B-box gene family in the Apple (Malus domestica Borkh.) genome
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Genome-wide identification and expression analysis of the B-box gene family in the Apple (Malus domestica Borkh.) genome
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Genome-wide identification and expression analysis of the B-box gene family in the Apple (Malus domestica Borkh.) genome
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Journal Article
Genome-wide identification and expression analysis of the B-box gene family in the Apple (Malus domestica Borkh.) genome
2018
Overview
The B-box proteins (BBXs) are a family of zinc finger proteins containing one/two B-box domain(s). Compared with intensive studies of animal BBXs, investigations of the plant BBX family are limited, though some specific plant BBXs have been demonstrated to act as transcription factors in the regulation of flowering and photomorphogenesis. In this study, using a global search of the apple (Malus domestica Borkh.) genome, a total of 64 members of BBX (MdBBX) were identified. All the MdBBXs were divided into five groups based on the phylogenetic relationship, numbers of B-boxes contained and whether there was with an additional CCT domain. According to the characteristics of organ-specific expression, MdBBXs were divided into three groups based on the microarray information. An analysis of cis-acting elements showed that elements related to the stress response were prevalent in the promoter sequences of most MdBBXs. Twelve MdBBX members from different groups were randomly selected and exposed to abiotic stresses. Their expressions were up-regulated to some extent in the roots and leaves. Six among 12 MdBBXs were sensitive to osmotic pressure, salt, cold stress and exogenous abscisic acid treatment, with their expressions enhanced more than 20-fold. Our results suggested that MdBBXs may take part in response to abiotic stress.
Publisher
Springer Nature B.V
