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Insight into the AP2/ERF transcription factor superfamily in sesame and expression profiling of DREB subfamily under drought stress

Dossa Komivi, Wei Xin, Li Donghua, Foncéka Daniel, Zhang Yanxin, Wang Linhai, Yu Jingyin, Liao Boshou, Diouf Diaga, Cissé Ndiaga, Zhang Xiurong. 2016. Insight into the AP2/ERF transcription factor superfamily in sesame and expression profiling of DREB subfamily under drought stress. BMC Plant Biology, 16 (171), 16 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Quartile : Q1, Sujet : PLANT SCIENCES

Abstract : Background. Sesame is an important oilseed crop mainly grown in inclement areas with high temperatures and frequent drought. Thus, drought constitutes one of the major constraints of its production. The AP2/ERF is a large family of transcription factors known to play significant roles in various plant processes including biotic and abiotic stress responses. Despite their importance, little is known about sesame AP2/ERF genes. This constitutes a limitation for drought-tolerance candidate genes discovery and breeding for tolerance to water deficit. Results. One hundred thirty-two AP2/ERF genes were identified in the sesame genome. Based on the number of domains, conserved motifs, genes structure and phylogenetic analysis including 5 relatives species, they were classified into 24 AP2, 41 DREB, 61 ERF, 4 RAV and 2 Soloist. The number of sesame AP2/ERF genes was relatively few compared to that of other relatives, probably due to gene loss in ERF and DREB subfamilies during evolutionary process. In general, the AP2/ERF genes were expressed differently in different tissues but exhibited the highest expression levels in the root. Mostly all DREB genes were responsive to drought stress. Regulation by drought is not specific to one DREB group but depends on the genes and the group A6 and A1 appeared to be more actively expressed to cope with drought. Conclusions. This study provides insights into the classification, evolution and basic functional analysis of AP2/ERF genes in sesame which revealed their putative involvement in multiple tissue-/developmental stages. Out of 20 genes which were significantly up- /down-regulated under drought stress, the gene AP2si16 may be considered as potential candidate gene for further functional validation as well for utilization in sesame improvement programs for drought stress tolerance. (Résumé d'auteur)

Mots-clés libres : Sesamum indicum, AP2/ERF, Transcription factors, Gene expression, Drought stress

Classification Agris : F30 - Plant genetics and breeding
F60 - Plant physiology and biochemistry
H50 - Miscellaneous plant disorders

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

  • Dossa Komivi, CAAS (CHN)
  • Wei Xin, CAAS (CHN)
  • Li Donghua, CAAS (CHN)
  • Foncéka Daniel, CIRAD-BIOS-UMR AGAP (SEN)
  • Zhang Yanxin, CAAS (CHN)
  • Wang Linhai, CAAS (CHN)
  • Yu Jingyin, CAAS (CHN)
  • Liao Boshou, CAAS (CHN)
  • Diouf Diaga, UCAD (SEN)
  • Cissé Ndiaga, CERAAS (SEN)
  • Zhang Xiurong, CAAS (CHN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/583210/)

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