1
|
Zheng L, Gao S, Bai Y, Zeng H, Shi H. NF-YC15 transcription factor activates ethylene biosynthesis and improves cassava disease resistance. PLANT BIOTECHNOLOGY JOURNAL 2024; 22:2424-2434. [PMID: 38600705 PMCID: PMC11331790 DOI: 10.1111/pbi.14355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 03/04/2024] [Accepted: 03/29/2024] [Indexed: 04/12/2024]
Abstract
The nuclear factor Y (NF-Y) transcription factors play important roles in plant development and physiological responses. However, the relationship between NF-Y, plant hormone and plant stress resistance in tropical crops remains unclear. In this study, we identified MeNF-YC15 gene in the NF-Y family that significantly responded to Xanthomonas axonopodis pv. manihotis (Xam) treatment. Using MeNF-YC15-silenced and -overexpressed cassava plants, we elucidated that MeNF-YC15 positively regulated disease resistance to cassava bacterial blight (CBB). Notably, we illustrated MeNF-YC15 downstream genes and revealed the direct genetic relationship between MeNF-YC15 and 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase (MeACO1)-ethylene module in disease resistance, as evidenced by the rescued disease susceptibility of MeNF-YC15 silenced cassava plants with ethylene treatment or overexpressing MeACO1. In addition, the physical interaction between 2C-type protein phosphatase 1 (MePP2C1) and MeNF-YC15 inhibited the transcriptional activation of MeACO1 by MeNF-YC15. In summary, MePP2C1-MeNF-YC15 interaction modulates ethylene biosynthesis and cassava disease resistance, providing gene network for cassava genetic improvement.
Collapse
Affiliation(s)
- Liyan Zheng
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and ForestryHainan UniversitySanya and HaikouHainan provinceChina
| | - Shuai Gao
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and ForestryHainan UniversitySanya and HaikouHainan provinceChina
| | - Yujing Bai
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and ForestryHainan UniversitySanya and HaikouHainan provinceChina
| | - Hongqiu Zeng
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and ForestryHainan UniversitySanya and HaikouHainan provinceChina
| | - Haitao Shi
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and ForestryHainan UniversitySanya and HaikouHainan provinceChina
| |
Collapse
|
2
|
Chao E, Song S, Guo Y, Liu Y, Zhao Y, Zhang H. Overexpression of PagLOL1b improves drought tolerance through increasing water use efficiency and reactive oxygen species scavenging in transgenic poplar. Int J Biol Macromol 2024; 278:134926. [PMID: 39182878 DOI: 10.1016/j.ijbiomac.2024.134926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 08/02/2024] [Accepted: 08/19/2024] [Indexed: 08/27/2024]
Abstract
LESION SIMULATING DISEASE1 (LSD) family genes play a key role in plant response to abiotic and biotic stress. However, their functions in the resistance of tree to drought stress are still largely not clear. Here, five LSD family genes in poplar genome were identified. Phylogenetic and collinear relationship analysis showed that they belonged to LSD, LSD-one-like 1 (LOL1) and LSD-one-like 2 (LOL2) subfamilies, and experienced two segmental duplication events. PagLSDs were highly conserved in gene structure, and all PagLSDs contained at least two LSD domains. Expression pattern and cis-acting element analyses showed that PagLSDs were widely expressed in different organs, significantly induced by polyethylene glycol, and possessed a great number of plant growth, development, plant hormones, and biotic and abiotic stress elements in their promoter regions. Further physiological experiments with transgenic poplar plants revealed that overexpression of PagLOL1b significantly enhanced the drought tolerance of transgenic plants. The improved drought tolerance was closely associated with the significant increase in stomatal closure, water use efficiency, antioxidant enzyme gene expression and antioxidant enzyme activity in transgenic plants. The results in our study imply that PagLOL1b has great potential in the engineering of new tree varieties resistant to drought stress.
Collapse
Affiliation(s)
- Erkun Chao
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, Shandong Province 264025, China; College of Life Sciences, Qufu Normal University, 57 Jingxuanxi Road, Qufu, Shandong Province 273165, China
| | - Shuo Song
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, Shandong Province 264025, China
| | - Yu Guo
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, Shandong Province 264025, China
| | - Yihua Liu
- College of Agriculture and Forestry Science, Linyi University, Middle Section of Shuangling Road, Linyi, Shandong Province 276000, China.
| | - Yanqiu Zhao
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, Shandong Province 264025, China; State Key Laboratory of Nutrient Use and Management, Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan, Shandong Province 250100, China.
| | - Hongxia Zhang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, Shandong Province 264025, China; College of Life Sciences, Qufu Normal University, 57 Jingxuanxi Road, Qufu, Shandong Province 273165, China; College of Agriculture and Forestry Science, Linyi University, Middle Section of Shuangling Road, Linyi, Shandong Province 276000, China; State Key Laboratory of Nutrient Use and Management, Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan, Shandong Province 250100, China; Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd, North of Beiyuanzhuang village, Fushan County, Zhaoyuan, Shandong Province 265400, China.
| |
Collapse
|
3
|
Lei C, Dang Z, Zhu M, Zhang M, Wang H, Chen Y, Zhang H. Identification of the ERF gene family of Mangifera indica and the defense response of MiERF4 to Xanthomonas campestris pv. mangiferaeindicae. Gene 2024; 912:148382. [PMID: 38493974 DOI: 10.1016/j.gene.2024.148382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 03/03/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
An important regulatory role for ethylene-responsive transcription factors (ERFs) is in plant growth and development, stress response, and hormone signaling. However, AP2/ERF family genes in mango have not been systematically studied. In this study, a total of 113 AP2/ERF family genes were identified from the mango genome and phylogenetically classified into five subfamilies: AP2 (28 genes), DREB (42 genes), ERF (33 genes), RAV (6 genes), and Soloist (4 genes). Of these, the ERF family, in conjunction with Arabidopsis and rice, forms a phylogenetic tree divided into seven groups, five of which have MiERF members. Analysis of gene structure and cis-elements showed that each MiERF gene contains only one AP2 structural domain, and that MiERF genes contain a large number of cis-elements associated with hormone signaling and stress response. Collinearity tests revealed a high degree of homology between MiERFs and CsERFs. Tissue-specific and stress-responsive expression profiling revealed that MiERF genes are primarily involved in the regulation of reproductive growth and are differentially and positively expressed in response to external hormones and pathogenic bacteria. Physiological results from a gain-of-function analysis of MiERF4 transiently overexpressed in tobacco and mango showed that transient expression of MiERF4 resulted in decreased colony count and callose deposition, as well as varying degrees of response to hormonal signals such as ETH, JA, and SA. Thus, MiERF4 may be involved in the JA/ETH signaling pathway to enhance plant defense against pathogenic bacteria. This study provides a basis for further research on the function and regulation of MiERF genes and lays a foundation for the selection of disease-resistant genes in mango.
Collapse
Affiliation(s)
- Chen Lei
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China; Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Zhiguo Dang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Min Zhu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572024, China
| | - Mengting Zhang
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Huiliang Wang
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Yeyuan Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572024, China.
| | - He Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China; Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
| |
Collapse
|
4
|
Bai Y, Dong Y, Zheng L, Zeng H, Wei Y, Shi H. Cassava phosphatase PP2C1 modulates thermotolerance via fine-tuning dephosphorylation of antioxidant enzymes. PLANT PHYSIOLOGY 2024; 194:2724-2738. [PMID: 38198213 DOI: 10.1093/plphys/kiae009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/13/2023] [Accepted: 11/15/2023] [Indexed: 01/12/2024]
Abstract
Global warming is an adverse environmental factor that threatens crop yields and food security. 2C-type protein phosphatases (PP2Cs), as core protein phosphatase components, play important roles in plant hormone signaling to cope with various environmental stresses. However, the function and underlying mechanism of PP2Cs in the heat stress response remain elusive in tropical crops. Here, we report that MePP2C1 negatively regulated thermotolerance in cassava (Manihot esculenta Crantz), accompanied by the modulation of reactive oxygen species (ROS) accumulation and the underlying antioxidant enzyme activities of catalase (CAT) and ascorbate peroxidase (APX). Further investigation found that MePP2C1 directly interacted with and dephosphorylated MeCAT1 and MeAPX2 at serine (S) 112 and S160 residues, respectively. Moreover, in vitro and in vivo assays showed that protein phosphorylation of MeCAT1S112 and MeAPX2S160 was essential for their enzyme activities, and MePP2C1 negatively regulated thermotolerance and redox homeostasis by dephosphorylating MeCAT1S112 and MeAPX2S160. Taken together, this study illustrates the direct relationship between MePP2C1-mediated protein dephosphorylation of MeCAT1 and MeAPX2 and ROS accumulation in thermotolerance to provide insights for adapting to global warming via fine-tuning thermotolerance of the tropical crop cassava.
Collapse
Affiliation(s)
- Yujing Bai
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Sanya, Hainan Province 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan Province 572025, China
| | - Yabin Dong
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Sanya, Hainan Province 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan Province 572025, China
| | - Liyan Zheng
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Sanya, Hainan Province 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan Province 572025, China
| | - Hongqiu Zeng
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Sanya, Hainan Province 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan Province 572025, China
| | - Yunxie Wei
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Sanya, Hainan Province 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan Province 572025, China
| | - Haitao Shi
- National Key Laboratory for Tropical Crop Breeding, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Sanya, Hainan Province 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan Province 572025, China
| |
Collapse
|
5
|
Zeng H, Xu H, Tan M, Zhang B, Shi H. LESION SIMULATING DISEASE 3 regulates disease resistance via fine-tuning histone acetylation in cassava. PLANT PHYSIOLOGY 2023; 193:2232-2247. [PMID: 37534747 DOI: 10.1093/plphys/kiad441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/16/2023] [Accepted: 07/16/2023] [Indexed: 08/04/2023]
Abstract
Bacterial blight seriously affects the growth and production of cassava (Manihot esculenta Crantz), but disease resistance genes and the underlying molecular mechanism remain unknown. In this study, we found that LESION SIMULATING DISEASE 3 (MeLSD3) is essential for disease resistance in cassava. MeLSD3 physically interacts with SIRTUIN 1 (MeSRT1), inhibiting MeSRT1-mediated deacetylation modification at the acetylation of histone 3 at K9 (H3K9Ac). This leads to increased H3K9Ac levels and transcriptional activation of SUPPRESSOR OF BIR1 (SOBIR1) and FLAGELLIN-SENSITIVE2 (FLS2) in pattern-triggered immunity, resulting in immune responses in cassava. When MeLSD3 was silenced, the release of MeSRT1 directly decreased H3K9Ac levels and inhibited the transcription of SOBIR1 and FLS2, leading to decreased disease resistance. Notably, DELLA protein GIBBERELLIC ACID INSENSITIVE 1 (MeGAI1) also interacted with MeLSD3, which enhanced the interaction between MeLSD3 and MeSRT1 and further strengthened the inhibition of MeSRT1-mediated deacetylation modification at H3K9Ac of defense genes. In summary, this study illustrates the mechanism by which MeLSD3 interacts with MeSRT1 and MeGAI1, thereby mediating the level of H3K9Ac and the transcription of defense genes and immune responses in cassava.
Collapse
Affiliation(s)
- Hongqiu Zeng
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Nanfan, School of Tropical Agriculture and Forestry, Hainan University, 572025, Sanya, Hainan Province, China
- National Key Laboratory for Tropical Crop Breeding, Hainan University, 572025, Sanya, Hainan Province, China
- Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, Hainan Province, China
| | - Haoran Xu
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Nanfan, School of Tropical Agriculture and Forestry, Hainan University, 572025, Sanya, Hainan Province, China
| | - Mengting Tan
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Nanfan, School of Tropical Agriculture and Forestry, Hainan University, 572025, Sanya, Hainan Province, China
| | - Bowen Zhang
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Nanfan, School of Tropical Agriculture and Forestry, Hainan University, 572025, Sanya, Hainan Province, China
| | - Haitao Shi
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, School of Nanfan, School of Tropical Agriculture and Forestry, Hainan University, 572025, Sanya, Hainan Province, China
- National Key Laboratory for Tropical Crop Breeding, Hainan University, 572025, Sanya, Hainan Province, China
- Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, Hainan Province, China
| |
Collapse
|
6
|
Zhou M, Wang G, Bai R, Zhao H, Ge Z, Shi H. The self-association of cytoplasmic malate dehydrogenase 1 promotes malate biosynthesis and confers disease resistance in cassava. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 201:107814. [PMID: 37321041 DOI: 10.1016/j.plaphy.2023.107814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 06/17/2023]
Abstract
Malate dehydrogenase (MDH) as an essential metabolic enzyme is widely involved in plant developmental processes. However, the direct relationship between its structural basis and in vivo roles especially in plant immunity remains elusive. In this study, we found that cytoplasmic cassava (Manihot esculenta, Me) MDH1 was essential for plant disease resistance against cassava bacterial blight (CBB). Further investigation revealed that MeMDH1 positively modulated cassava disease resistance, accompanying the regulation of salicylic acid (SA) accumulation and pathogensis-related protein 1 (MePR1) expression. Notably, the metabolic product of MeMDH1 (malate) also improved disease resistance in cassava, and its application rescued the disease susceptibility and decreased immune responses of MeMDH1-silenced plants, indicating that malate was responsible for MeMDH1-mediated disease resistance. Interestingly, MeMDH1 relied on Cys330 residues to form homodimer, which was directly related with MeMDH1 enzyme activity and the corresponding malate biosynthesis. The crucial role of Cys330 residue in MeMDH1 was further confirmed by in vivo functional comparison between overexpression of MeMDH1 and MeMDH1C330A in cassava disease resistance. Taken together, this study highlights that MeMDH1 confers improved plant disease resistance through protein self-association to promote malate biosynthesis, extending the knowledge of the relationship between its structure and cassava disease resistance.
Collapse
Affiliation(s)
- Mengmeng Zhou
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, College of Tropical Crops, Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Hainan province, China; National Key Laboratory for Tropical Crop Breeding, Hainan University, Hainan province, China; Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan province, China
| | - Guanqi Wang
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, College of Tropical Crops, Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Hainan province, China; National Key Laboratory for Tropical Crop Breeding, Hainan University, Hainan province, China; Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan province, China
| | - Ruoyu Bai
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, College of Tropical Crops, Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Hainan province, China; National Key Laboratory for Tropical Crop Breeding, Hainan University, Hainan province, China; Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan province, China
| | - Huiping Zhao
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, College of Tropical Crops, Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Hainan province, China; National Key Laboratory for Tropical Crop Breeding, Hainan University, Hainan province, China; Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan province, China
| | - Zhongyuan Ge
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, College of Tropical Crops, Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Hainan province, China; National Key Laboratory for Tropical Crop Breeding, Hainan University, Hainan province, China; Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan province, China
| | - Haitao Shi
- Sanya Nanfan Research Institute of Hainan University, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan Province, College of Tropical Crops, Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Hainan province, China; National Key Laboratory for Tropical Crop Breeding, Hainan University, Hainan province, China; Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan province, China.
| |
Collapse
|
7
|
Ding Y, Wang X, Wang D, Jiang L, Xie J, Wang T, Song L, Zhao X. Identification of CmbHLH Transcription Factor Family and Excavation of CmbHLHs Resistant to Necrotrophic Fungus Alternaria in Chrysanthemum. Genes (Basel) 2023; 14:genes14020275. [PMID: 36833202 PMCID: PMC9957535 DOI: 10.3390/genes14020275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/15/2023] [Accepted: 01/16/2023] [Indexed: 01/22/2023] Open
Abstract
Chrysanthemum morifolium Ramat. 'Huaihuang' is a traditional Chinese medicinal plant. However, a black spot disease caused by Alternaria sp., a typical necrotrophic fungus, has a serious damaging influence on the field growth, yield, and quality of the plant. 'Huaiju 2#' being bred from 'Huaihuang', shows resistance to Alternaria sp. bHLH transcription factor has been widely studied because of their functions in growth development, signal transduction, and abiotic stress. However, the function of bHLH in biotic stress has rarely been studied. To characterize the resistance genes, the CmbHLH family was surveyed in 'Huaiju 2#'. On the basis of the transcriptome database of 'Huaiju 2#' after Alternaria sp. inoculation, with the aid of the Chrysanthemum genome database, 71 CmbHLH genes were identified and divided into 17 subfamilies. Most (64.8%) of the CmbHLH proteins were rich in negatively charged amino acids. CmbHLH proteins are generally hydrophilic proteins with a high aliphatic amino acid content. Among the 71 CmbHLH proteins, five CmbHLHs were significantly upregulated by Alternaria sp. infection, and the expression of CmbHLH18 was the most significant. Furthermore, heterologous overexpression of CmbHLH18 could improve the resistance of Arabidopsis thaliana to necrotrophic fungus Alternaria brassicicola by enhancing callose deposition, preventing spores from entering leaves, reducing ROS accumulation, increasing the activities of antioxidant enzymes and defense enzymes, and promoting their gene expression levels. These results indicate that the five CmbHLHs, especially CmbHLH18, may be considered candidate genes for resistance to necrotrophic fungus. These findings not only increase our understanding of the role CmbHLHs play in biotic stress but also provide a basis by using CmbHLHs to breed a new variety of Chrysanthemum with high resistance to necrotrophic fungus.
Collapse
Affiliation(s)
- Yifeng Ding
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Xiaomeng Wang
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Dandan Wang
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Liwei Jiang
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Jing Xie
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Tianle Wang
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Lingyu Song
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Xiting Zhao
- Department of Biological Sciences, College of Life Sciences, Henan Normal University, Xinxiang 453007, China
- Engineering Technology Research Center of Nursing and Utilization of Genuine Chinese Crude Drugs in Henan Province, Xinxiang 453007, China
- Engineering Laboratory of Biotechnology for Green Medicinal Plant of Henan Province, Xinxiang 453007, China
- Correspondence: or ; Tel.: +86-182-3739-1085 or +86-135-6988-6182
| |
Collapse
|
8
|
Melicher P, Dvořák P, Šamaj J, Takáč T. Protein-protein interactions in plant antioxidant defense. FRONTIERS IN PLANT SCIENCE 2022; 13:1035573. [PMID: 36589041 PMCID: PMC9795235 DOI: 10.3389/fpls.2022.1035573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
The regulation of reactive oxygen species (ROS) levels in plants is ensured by mechanisms preventing their over accumulation, and by diverse antioxidants, including enzymes and nonenzymatic compounds. These are affected by redox conditions, posttranslational modifications, transcriptional and posttranscriptional modifications, Ca2+, nitric oxide (NO) and mitogen-activated protein kinase signaling pathways. Recent knowledge about protein-protein interactions (PPIs) of antioxidant enzymes advanced during last decade. The best-known examples are interactions mediated by redox buffering proteins such as thioredoxins and glutaredoxins. This review summarizes interactions of major antioxidant enzymes with regulatory and signaling proteins and their diverse functions. Such interactions are important for stability, degradation and activation of interacting partners. Moreover, PPIs of antioxidant enzymes may connect diverse metabolic processes with ROS scavenging. Proteins like receptor for activated C kinase 1 may ensure coordination of antioxidant enzymes to ensure efficient ROS regulation. Nevertheless, PPIs in antioxidant defense are understudied, and intensive research is required to define their role in complex regulation of ROS scavenging.
Collapse
|