Characteristics of bHLH transcription factors and their roles in the abiotic stress responses of horticultural crops

Wang, Kangning; Liu, Huayu; Mei, Quanlin; Yang, Jie; Ma, Fengwang; Mao, Ke

doi:10.1016/j.scienta.2022.111710

Cited by 26 publications

(11 citation statements)

References 145 publications

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“…bHLH104 mediates the Fe absorption process in apple (Wang et al, 2023; Zhou et al, 2019; Li et al, 2021). Under Fe‐deficient conditions, apple MdbHLH104 can function together with other bHLH IVc TFs to improve the expression level of MdAHA8 , contributing positively to rhizosphere acidification.…”

Section: Bhlh Tfs Are Involved In Fe Deficiency Stressmentioning

confidence: 99%

“…IRON MAN/FE‐UPTAKE‐INDUCING PEPTIDE (IMA/FEP), a family of small peptides, has been identified as a key component of the induction of Fe deficiency responses (Wang et al, 2023) (Figure 6). Garcia et al (2022) found LONG‐DISTANCE IRON SIGNAL (LODIS) acted upstream of IMA peptide to regulate its expression.…”

Section: Bhlh Tfs Are Involved In Fe Deficiency Stressmentioning

confidence: 99%

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Transcription factors dealing with Iron‐deficiency stress in plants: focus on the bHLH transcription factor family

Zhang,

Cheng,

Wang

et al. 2023

Physiologia Plantarum

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Iron (Fe), as an important micronutrient element necessary for plant growth and development, not only participates in multiple physiological and biochemical reactions in cells but also exerts a crucial role in respiration and photosynthetic electron transport. Since Fe is mainly present in the soil in the form of iron hydroxide, Fe deficiency exists universally in plants and has become an important factor triggering crop yield reduction and quality decline. It has been shown that transcription factors (TFs), as an important part of plant signaling pathways, not only coordinate the internal signals of different interaction partners during plant development, but also participate in plant responses to biological and abiotic stresses, such as Fe deficiency stress. Here, the role of bHLH transcription factors in the regulation of Fe homeostasis (mainly Fe uptake) is discussed with emphasis on the functions of MYB, WRKY and other TFs in the maintenance of Fe homeostasis. This review provides a theoretical basis for further studies on the regulation of TFs in Fe deficiency stress response.

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Section: Bhlh Tfs Are Involved In Fe Deficiency Stressmentioning

confidence: 99%

Section: Bhlh Tfs Are Involved In Fe Deficiency Stressmentioning

confidence: 99%

Transcription factors dealing with Iron‐deficiency stress in plants: focus on the bHLH transcription factor family

Zhang,

Cheng,

Wang

et al. 2023

Physiologia Plantarum

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“…To date, bHLH transcription factors have received wide attentions because of their extensive involvements in regulating diverse biological processes during plant development, especially in the regulation of the adaptation to numerous abiotic stress, including resistance to salt, drought, low/high temperature stresses, oxidative stress, iron de ciency, heavy metal stress, and osmotic stress [9,[102][103][104][105][106]]. In addition, they also participate in the crosstalk of different hormones signaling, such as brassinosteroid (BR), salicylic acid (SA), abscisic acid (ABA), ethylene (ET), and jasmonic acid (JA) [74], and they are crucial for the growth and survival of plant species in environment.…”

Section: Expression Pro Ling and Functional Prediction Of Slbhlhs In ...mentioning

confidence: 99%

Genome- and transcriptome-wide systematic identification of bHLH transcription factor family and characterization of promising members that respond to abiotic stress in tomato

Zhang,

Pan,

et al. 2023

Preprint

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Background The bHLH (basic helix-loop-helix) transcription factors function as crucial regulators in numerous biological processes including abiotic stress responses and plant growth and development. Although SlbHLH gene family in tomato has been studied and the functions of some members have been explored, there are still many tomato SlbHLH genes that have not been identified and numbered, which will hinder the later study of SlbHLH genes. A genome-wide systematical identification and characterization is necessary for tomato SlbHLH genes. Results In the study, numerous genes were identified to be the potential and significant candidates that response to salt stress through RNA-seq analysis. 195 bHLH genes that unevenly distributed onto 12 chromosomes were identified from tomato genome. Phylogenetic relationships showed that SlbHLHs were classified into 26 subfamilies based on their conserved domain, motif compositions and gene structures. The collinearity between SlbHLHs and interrelated orthologs from ten plants further revealed evolutionary insights into SlbHLHs. Cis-elements investigations of SlbHLH gene promotors futhrer suggested the potential roles of SlbHLHs in tomato development and stress responses. The qRT-PCR analysis displayed that the expression of 12 selected SlbHLHs were varyingly and markedly induced by multiple abiotic stresses (salt, cold, heat and drought) and hormone treatments (SA, ABA, IAA, ACC and MeJA). Conclusions These results provide valuable foundations for further exploring possible regulatory mechanisms and functional characterizations of SlbHLHs, and numerous members may function as the potential regulators to enhance plant tolerance to abiotic stress.

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“…High salinity causes excessive accumulation of Na + in plants, resulting in an ionic imbalance and ion toxicity (Colin et al., 2023; Hussain et al., 2021; Wang et al., 2023). In addition to the autophagy pathway, plants directly regulate the accumulation and homeostasis of Na + in the cytoplasm through various ion channels and transporters.…”

Section: Introductionmentioning

confidence: 99%

“…Transcription factors (TFs) play important roles in the stress signal transduction process (Century et al., 2008). Many TFs play key roles in the response to salt stress in plants, such as MYBs, bHLHs, DREBs, and WRKYs (Hassan et al., 2022; Kang et al., 2022; Ke et al., 2020; Khoso et al., 2022; Mao et al., 2017; Wang et al., 2023). The homeodomain‐leucine zipper (HD‐Zip) family of proteins are plant‐specific TFs involved in regulating plant growth and development and various stress responses (Agalou et al., 2008; Gong et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

MdHB7‐like positively modulates apple salt tolerance by promoting autophagic activity and Na⁺ efflux

et al. 2023

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SUMMARYSalt stress adversely affects the yield and quality of crops and limits their geographical distribution. Studying the functions and regulatory mechanisms of key genes in the salt stress response is important for breeding crops with enhanced stress resistance. Autophagy plays an important role in modulating the tolerance of plants to various types of abiotic stressors. However, the mechanisms underlying salt‐induced autophagy are largely unknown. Cation/Ca2+ exchanger proteins enhance apple salt tolerance by inhibiting Na+ accumulation but the mechanism underlying the response to salt stress remains unclear. Here, we show that the autophagy‐related gene MdATG18a modulated apple salt tolerance. Under salt stress, the autophagic activity, proline content, and antioxidant enzyme activities were higher and Na+ accumulation was lower in MdATG18a‐overexpressing transgenic plants than in control plants. The use of an autophagy inhibitor during the salt treatment demonstrated that the regulatory function of MdATG18a depended on autophagy. The yeast‐one‐hybrid assay revealed that the homeodomain‐leucine zipper (HD‐Zip) transcription factor MdHB7‐like directly bound to the MdATG18a promoter. Transcriptional regulation and genetic analyses showed that MdHB7‐like enhanced salt‐induced autophagic activity by promoting MdATG18a expression. The analysis of Na+ efflux rate in transgenic yeast indicated that MdCCX1 expression significantly promoted Na+ efflux. Promoter binding, transcriptional regulation, and genetic analyses showed that MdHB7‐like promoted Na+ efflux and apple salt tolerance by directly promoting MdCCX1 expression, which was independent of the autophagy pathway. Overall, our findings provide insight into the mechanism underlying MdHB7‐like‐mediated salt tolerance in apple through the MdHB7‐like‐MdATG18a and MdHB7‐like‐MdCCX1 modules. These results will aid future studies on the mechanisms underlying stress‐induced autophagy and the regulation of stress tolerance in plants.

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Characteristics of bHLH transcription factors and their roles in the abiotic stress responses of horticultural crops

Cited by 26 publications

References 145 publications

Transcription factors dealing with Iron‐deficiency stress in plants: focus on the bHLH transcription factor family

Transcription factors dealing with Iron‐deficiency stress in plants: focus on the bHLH transcription factor family

Genome- and transcriptome-wide systematic identification of bHLH transcription factor family and characterization of promising members that respond to abiotic stress in tomato

MdHB7‐like positively modulates apple salt tolerance by promoting autophagic activity and Na⁺ efflux

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Characteristics of bHLH transcription factors and their roles in the abiotic stress responses of horticultural crops

Cited by 26 publications

References 145 publications

Transcription factors dealing with Iron‐deficiency stress in plants: focus on the bHLH transcription factor family

Transcription factors dealing with Iron‐deficiency stress in plants: focus on the bHLH transcription factor family

Genome- and transcriptome-wide systematic identification of bHLH transcription factor family and characterization of promising members that respond to abiotic stress in tomato

MdHB7‐like positively modulates apple salt tolerance by promoting autophagic activity and Na+ efflux

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MdHB7‐like positively modulates apple salt tolerance by promoting autophagic activity and Na⁺ efflux