Overexpression of  CmMYB15  provides chrysanthemum resistance to aphids by regulating the biosynthesis of lignin

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Abstract

MYB transcription factors are widely involved in the development of and physiological processes in plants. Here, we isolated the chrysanthemum R2R3-MYB family transcription factor CmMYB15, a homologous gene of AtMYB15. It was demonstrated that CmMYB15 expression was induced by aphids and that CmMYB15 could bind to AC elements, which usually exist in the promoter of lignin biosynthesis genes. Overexpression of CmMYB15 in chrysanthemum enhanced the resistance of aphids. Additionally, the content of lignin and the expression of several lignin biosynthesis genes increased. In summary, the results indicate that CmMYB15 regulates lignin biosynthesis genes that enhance the resistance of chrysanthemum to aphids.

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Most cited references 40

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Supriya Ambawat, Poonam Sharma, Neelam R. Yadav … (2013)

Regulation of gene expression at the level of transcription controls many crucial biological processes. Transcription factors (TFs) play a great role in controlling cellular processes and MYB TF family is large and involved in controlling various processes like responses to biotic and abiotic stresses, development, differentiation, metabolism, defense etc. Here, we review MYB TFs with particular emphasis on their role in controlling different biological processes. This will provide valuable insights in understanding regulatory networks and associated functions to develop strategies for crop improvement.

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Lignin, one of the most abundant terrestrial biopolymers, is indispensable for plant structure and defense. With the availability of the full genome sequence, large collections of insertion mutants, and functional genomics tools, Arabidopsis constitutes an excellent model system to profoundly unravel the monolignol biosynthetic pathway. In a genome-wide bioinformatics survey of the Arabidopsis genome, 34 candidate genes were annotated that encode genes homologous to the 10 presently known enzymes of the monolignol biosynthesis pathway, nine of which have not been described before. By combining evolutionary analysis of these 10 gene families with in silico promoter analysis and expression data (from a reverse transcription-polymerase chain reaction analysis on an extensive tissue panel, mining of expressed sequence tags from publicly available resources, and assembling expression data from literature), 12 genes could be pinpointed as the most likely candidates for a role in vascular lignification. Furthermore, a possible novel link was detected between the presence of the AC regulatory promoter element and the biosynthesis of G lignin during vascular development. Together, these data describe the full complement of monolignol biosynthesis genes in Arabidopsis, provide a unified nomenclature, and serve as a basis for further functional studies.

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Plant cell wall dynamics and wall-related susceptibility in plant–pathogen interactions

Daniela Bellincampi, Felice Cervone, Vincenzo Lionetti (2014)

The cell wall is a dynamic structure that often determines the outcome of the interactions between plants and pathogens. It is a barrier that pathogens need to breach to colonize the plant tissue. While fungal necrotrophs extensively destroy the integrity of the cell wall through the combined action of degrading enzymes, biotrophic fungi require a more localized and controlled degradation of the cell wall in order to keep the host cells alive and utilize their feeding structures. Also bacteria and nematodes need to degrade the plant cell wall at a certain stage of their infection process, to obtain nutrients for their growth. Plants have developed a system for sensing pathogens and monitoring the cell wall integrity, upon which they activate defense responses that lead to a dynamic cell wall remodeling required to prevent the disease. Pathogens, on the other hand, may exploit the host cell wall metabolism to support the infection. We review here the strategies utilized by both plants and pathogens to prevail in the cell wall battleground.

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Author and article information

Contributors

Sumei Chen: +86-25-84399670 , chensm@njau.edu.cn

Journal

Journal ID (nlm-ta): Hortic Res

Journal ID (iso-abbrev): Hortic Res

Title: Horticulture Research

Publisher: Nature Publishing Group UK (London )

ISSN (Electronic): 2052-7276

Publication date (Electronic): 11 July 2019

Publication date PMC-release: 11 July 2019

Publication date Collection: 2019

Volume: 6

Electronic Location Identifier: 84

Affiliations

ISNI 0000 0000 9750 7019, GRID grid.27871.3b, State Key Laboratory of Crop Genetics and Germplasm Enhancement, the Key Laboratory of Landscaping, Ministry of Agriculture, College of Horticulture, , Nanjing Agricultural University, ; Nanjing, 210095 China

Article

Publisher ID: 166

DOI: 10.1038/s41438-019-0166-y

PMC ID: 6804602

PubMed ID: 31645945

SO-VID: b6ae66df-319e-46c1-a697-c5a0ae232f10

License:

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

History

Date received : 17 February 2019

Date revision received : 10 May 2019

Date accepted : 17 May 2019

Funding

Funded by: FundRef https://doi.org/10.13039/501100001809, National Natural Science Foundation of China (National Science Foundation of China);

Award ID: 31672192

Award Recipient : Cong An Liping Sheng Xinping Du Aiping Song Fadi Chen

Funded by: The Program for Key Research and Development, Jiangsu, China (BE2017318) The National Key Research and Development Program of China (2018YFD1000402)