title: Genome-Wide Dissection of the Heat Shock Transcription Factor Family Genes inArachis.
abstract: Heat shock transcription factors (Hsfs) are important transcription factors (TFs) in protecting plants from damages caused by various stresses. The released whole genome sequences of wild peanuts make it possible for genome-wide analysis of Hsfs in peanut. In this study, a total of 16 and 17Hsfgenes were identified fromArachis duranensisandA. ipaensis, respectively. We identified 16 orthologous Hsf gene pairs in both peanut species; howeverHsfXswas only identified fromA. ipaensis. Orthologous pairs between two wild peanut species were highly syntenic. Based on phylogenetic relationship, peanut Hsfs were divided into groups A, B, and C. Selection pressure analysis showed that group B Hsf genes mainly underwent positive selection and group A Hsfs were affected by purifying selection. Small scale segmental and tandem duplication may play important roles in the evolution of these genes. Cis-elements, such as ABRE, DRE, and HSE, were found in the promoters of mostArachisHsf genes. FiveAdHsfsand twoAiHsfscontained fungal elicitor responsive elements suggesting their involvement in response to fungi infection. These genes were differentially expressed in cultivated peanut under abiotic stress andAspergillus flavusinfection.AhHsf2andAhHsf14were significantly up-regulated after inoculation withA. flavussuggesting their possible role in fungal resistance.
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology Jinan, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wang
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology Jinan, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Song
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology Jinan, China.
authors.forename: Changsheng
authors.initials: C
authors.lastname: Li
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology Jinan, China.
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Li
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology Jinan, China.
authors.forename: Aiqin
authors.initials: A
authors.lastname: Li
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology Jinan, China.
authors.forename: Hongshan
authors.initials: H
authors.lastname: Guan
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology Jinan, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Hou
authors.affiliation: Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and PhysiologyJinan, China; College of Life Sciences, Shandong Normal UniversityJinan, China.
authors.forename: Xingjun
authors.initials: X
authors.lastname: Wang
keywords: abiotic stress; heat shock transcription factor; peanut; purifying selection; selective pressure