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Genome-Wide Identification of MabHLH Transcription Factors Family Response to Magnesium Deficiency Stress in Banana (Musa paradisiaca AA)

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Abstract

Banana is an important tropical fruit belonging to the Musa family, which is susceptible to nutritional deficiency symptoms during cultivation. Due to magnesium deficiency, the growth of bananas (Musa paradisiaca AA) is inhibited, and become prone to diseases and pests, which decreases the yield and quality of bananas. Basic helix-loop-helix(bHLH) is one of the largest transcription factor(TF) families in plants. It plays an important role in plant growth, development as well as resistance against abiotic stresses. In this research, 177 MabHLH proteins with four conserved subdomains were obtained via 166 AtbHLH proteins were applied to homologous comparisons from the banana genome database, which carried five highly conserved key amino acid residues consist of Arg-8, Arg-9, Leu-19, Leu-45 and Leu-52. Then, 12 subfamilies were divided according to the phylogenetic tree of 177 MabHLHs with wholly distributed in 11 chromosomes of banana. Functional prediction substantiated that subfamilies of 177 MabHLHs were involved in different biological and abiotic stresses, homeostasis regulation, cell signaling, plant growth and development and so on. Transcriptome analysis showed that the expression of 45 MabHLHs existed a significant difference in response to magnesium deficiency stress, among 16 MabHLHs were part of Group III and IVa. The qRT-PCR experiment of 18 MabHLHs confirmed that MabHLHs did play an important role in magnesium deficiency stress. Above all, we studied the MabHLH gene family of bananas to dig out the potential regulatory genes against magnesium deficiency stress, which are holpful to further improve the stress resistance level of bananas under magnesium deficiency.

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Data Availability

The data that support the findings of this study are available from Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, which were used under license for this study. Data are available in https://doi.org/10.1007/s00425-021-03769-z.

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Funding

This research was financially supported by the Hainan Natural Science Foundation of High-Level Talents Project (no. 320RC494), the Research Foundation for Advanced Talents of Hainan University [no. KYQD(ZR)1849].

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Contributions

H.Y.H. conceptualized and designed the experiments. P.L. and X.P.L. performed most of the experiments under the supervision of H.Y.H., provided help with bio-informatic analysis and wrote the manuscript with the support of all other authors. S.H.Z. helped to collect the samples. P.L, X.P.L and H.Y.H. critically revised the manuscript.

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Correspondence to Haiyan Hu.

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The authors declare that they have no conflict of interest.

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Communicated by: Ray Ming

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Li, P., Li, X., Zhou, S. et al. Genome-Wide Identification of MabHLH Transcription Factors Family Response to Magnesium Deficiency Stress in Banana (Musa paradisiaca AA). Tropical Plant Biol. 16, 156–169 (2023). https://doi.org/10.1007/s12042-023-09336-y

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