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Williams K, Subramani M, Lofton LW, Penney M, Todd A, Ozbay G. Tools and Techniques to Accelerate Crop Breeding. PLANTS (BASEL, SWITZERLAND) 2024; 13:1520. [PMID: 38891328 PMCID: PMC11174677 DOI: 10.3390/plants13111520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/25/2024] [Accepted: 05/30/2024] [Indexed: 06/21/2024]
Abstract
As climate changes and a growing global population continue to escalate the need for greater production capabilities of food crops, technological advances in agricultural and crop research will remain a necessity. While great advances in crop improvement over the past century have contributed to massive increases in yield, classic breeding schemes lack the rate of genetic gain needed to meet future demands. In the past decade, new breeding techniques and tools have been developed to aid in crop improvement. One such advancement is the use of speed breeding. Speed breeding is known as the application of methods that significantly reduce the time between crop generations, thereby streamlining breeding and research efforts. These rapid-generation advancement tactics help to accelerate the pace of crop improvement efforts to sustain food security and meet the food, feed, and fiber demands of the world's growing population. Speed breeding may be achieved through a variety of techniques, including environmental optimization, genomic selection, CRISPR-Cas9 technology, and epigenomic tools. This review aims to discuss these prominent advances in crop breeding technologies and techniques that have the potential to greatly improve plant breeders' ability to rapidly produce vital cultivars.
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Affiliation(s)
- Krystal Williams
- Molecular Genetics and Epigenomics Laboratory, Department of Agriculture and Natural Resources, College of Agriculture, Science, and Technology, Delaware State University, Dover, DE 19901, USA;
| | - Mayavan Subramani
- Molecular Genetics and Epigenomics Laboratory, Department of Agriculture and Natural Resources, College of Agriculture, Science, and Technology, Delaware State University, Dover, DE 19901, USA;
| | - Lily W. Lofton
- Department of Plant Pathology, University of Georgia, Athens, GA 30602, USA;
- Toxicology & Mycotoxin Research Unit, US National Poultry Research Center, USDA-ARS, Athens, GA 30602, USA
| | - Miranda Penney
- Plant Breeding and Genetics Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA;
| | - Antonette Todd
- Molecular Genetics and Epigenomics Laboratory, Department of Agriculture and Natural Resources, College of Agriculture, Science, and Technology, Delaware State University, Dover, DE 19901, USA;
| | - Gulnihal Ozbay
- One Health Laboratory, Department of Agriculture and Natural Resources, College of Agriculture, Science, and Technology, Delaware State University, Dover, DE 19901, USA
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2
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Chaudhary D, Jeena AS, Rohit, Gaur S, Raj R, Mishra S, Kajal, Gupta OP, Meena MR. Advances in RNA Interference for Plant Functional Genomics: Unveiling Traits, Mechanisms, and Future Directions. Appl Biochem Biotechnol 2024:10.1007/s12010-023-04850-x. [PMID: 38175411 DOI: 10.1007/s12010-023-04850-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2023] [Indexed: 01/05/2024]
Abstract
RNA interference (RNAi) is a conserved molecular mechanism that plays a critical role in post-transcriptional gene silencing across diverse organisms. This review delves into the role of RNAi in plant functional genomics and its applications in crop improvement, highlighting its mechanistic insights and practical implications. The review begins with the foundational discovery of RNAi's mechanism, tracing its origins from petunias to its widespread presence in various organisms. Various classes of regulatory non-coding small RNAs, including siRNAs, miRNAs, and phasiRNAs, have been uncovered, expanding the scope of RNAi-mediated gene regulation beyond conventional understanding. These RNA classes participate in intricate post-transcriptional and epigenetic processes that influence gene expression. In the context of crop enhancement, RNAi has emerged as a powerful tool for understanding gene functions. It has proven effective in deciphering gene roles related to stress resistance, metabolic pathways, and more. Additionally, RNAi-based approaches hold promise for integrated pest management and sustainable agriculture, contributing to global efforts in food security. This review discusses RNAi's diverse applications, such as modifying plant architecture, extending shelf life, and enhancing nutritional content in crops. The challenges and future prospects of RNAi technology, including delivery methods and biosafety concerns, are also explored. The global landscape of RNAi research is highlighted, with significant contributions from regions such as China, Europe, and North America. In conclusion, RNAi remains a versatile and pivotal tool in modern plant research, offering novel avenues for understanding gene functions and improving crop traits. Its integration with other biotechnological approaches such as gene editing holds the potential to shape the future of agriculture and sustainable food production.
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Affiliation(s)
- Divya Chaudhary
- Department of Genetics and Plant Breeding, College of Agriculture, G B Pant University of Agriculture and Technology, Pantnagar, 263145, Uttarakhand, India
| | - Anand Singh Jeena
- Department of Genetics and Plant Breeding, College of Agriculture, G B Pant University of Agriculture and Technology, Pantnagar, 263145, Uttarakhand, India.
| | - Rohit
- Department of Genetics and Plant Breeding, College of Agriculture, G B Pant University of Agriculture and Technology, Pantnagar, 263145, Uttarakhand, India
| | - Sonali Gaur
- Department of Genetics and Plant Breeding, College of Agriculture, G B Pant University of Agriculture and Technology, Pantnagar, 263145, Uttarakhand, India
| | - Rishi Raj
- ICAR- Sugarcane Breeding Institute-Regional Centre, Karnal, 132001, Haryana, India
| | | | - Kajal
- Department of Biotechnology, Chandigarh University, Chandigarh, 140143, India
| | - Om Prakash Gupta
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, 132001, Haryana, India.
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Xu C, Guo H, Li R, Lan X, Zhang Y, Xie Q, Zhu D, Mu Q, Wang Z, An M, Xia Z, Wu Y. Transcriptomic and functional analyses reveal the molecular mechanisms underlying Fe-mediated tobacco resistance to potato virus Y infection. FRONTIERS IN PLANT SCIENCE 2023; 14:1163679. [PMID: 37063211 PMCID: PMC10098458 DOI: 10.3389/fpls.2023.1163679] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 03/15/2023] [Indexed: 06/19/2023]
Abstract
Potato virus Y (PVY) mainly infects Solanaceous crops, resulting in considerable losses in the yield and quality. Iron (Fe) is involved in various biological processes in plants, but its roles in resistance to PVY infection has not been reported. In this study, foliar application of Fe could effectively inhibit early infection of PVY, and a full-length transcriptome and Illumina RNA sequencing was performed to investigate its modes of action in PVY-infected Nicotiana tabacum. The results showed that 18,074 alternative splicing variants, 3,654 fusion transcripts, 3,086 long non-coding RNAs and 14,403 differentially expressed genes (DEGs) were identified. Specifically, Fe application down-regulated the expression levels of the DEGs related to phospholipid hydrolysis, phospholipid signal, cell wall biosynthesis, transcription factors (TFs) and photosystem I composition, while those involved with photosynthetic electron transport chain (PETC) were up-regulated at 1 day post inoculation (dpi). At 3 dpi, these DEGs related to photosystem II composition, PETC, molecular chaperones, protein degradation and some TFs were up-regulated, while those associated with light-harvesting, phospholipid hydrolysis, cell wall biosynthesis were down-regulated. At 9 dpi, Fe application had little effects on resistance to PVY infection and transcript profiles. Functional analysis of these potentially critical DEGs was thereafter performed using virus-induced gene silencing approaches and the results showed that NbCat-6A positively regulates PVY infection, while the reduced expressions of NbWRKY26, NbnsLTP, NbFAD3 and NbHSP90 significantly promote PVY infection in N. benthamiana. Our results elucidated the regulatory network of Fe-mediated resistance to PVY infection in plants, and the functional candidate genes also provide important theoretical bases to further improve host resistance against PVY infection.
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Affiliation(s)
- Chuantao Xu
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
- Luzhou City Company of Sichuan Province Tobacco Company, Luzhou, China
| | - Huiyan Guo
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Rui Li
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Xinyu Lan
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yonghui Zhang
- Luzhou City Company of Sichuan Province Tobacco Company, Luzhou, China
| | - Qiang Xie
- Luzhou City Company of Sichuan Province Tobacco Company, Luzhou, China
| | - Di Zhu
- Guizhou Qianxinan Prefectural Tobacco Company, Xingyi, China
| | - Qing Mu
- Guizhou Qianxinan Prefectural Tobacco Company, Xingyi, China
| | - Zhiping Wang
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Mengnan An
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Zihao Xia
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yuanhua Wu
- Liaoning Key Laboratory of Plant Pathology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
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Chuang CY, Lin ST, Li AT, Li SH, Hsiao CY, Lin YH. Bacillus amyloliquefaciens PMB05 Increases Resistance to Bacterial Wilt by Activating Mitogen-Activated Protein Kinase and Reactive Oxygen Species Pathway Crosstalk in Arabidopsis thaliana. PHYTOPATHOLOGY 2022; 112:2495-2502. [PMID: 35793151 DOI: 10.1094/phyto-04-22-0134-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Bacterial wilt caused by Ralstonia solanacearum can infect many crops, causing significant losses worldwide. The use of beneficial microorganisms is considered a feasible method for controlling this disease. Our previous study showed that Bacillus amyloliquefaciens PMB05 can control bacterial wilt through intensifying immune signals triggered by a pathogen-associated molecular pattern (PAMP) from R. solanacearum. It is still uncertain whether induction of the mitogen-activated protein kinase (MAPK) pathway during PAMP-triggered immunity (PTI) is responsible for enhancing disease resistance. To gain more insights on how the presence of PMB05 regulates PTI signaling, its association with the MAPK pathway was assayed. Our results showed that the activation of MPK3/6 and expression of wrky22 upon treatment with the PAMP, PopW, was increased during co-treatment with PMB05. Moreover, the disease resistance conferred by PMB05 to bacterial wilt was abolished in mekk1, mkk5, and mpk6 mutants. To determine the relationship between the MAPK pathway and plant immune signals, the assay on reactive oxygen species (ROS) generation and callose deposition showed that only the ROS generation was strongly reduced in these mutants. Because ROS generation is highly correlated with RbohD, the results revealed that the effects of PMB05 on both PopW-induced ROS generation and disease resistance to bacterial wilt were eliminated in the rbohD mutant, suggesting that the generation of ROS is also required for PMB05-enhanced disease resistance. Taken together, we concluded that the crosstalk between the initiation of ROS generation and further activation of the MAPK pathway is necessary when PMB05 is used to improve disease resistance to bacterial wilt. [Formula: see text] Copyright © 2022 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Chiao-Yu Chuang
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Si-Ting Lin
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Ai-Ting Li
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Sin-Hua Li
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Chia-Yu Hsiao
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Yi-Hsien Lin
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
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Garcia L, Molina MC, Padgett-Pagliai KA, Torres PS, Bruna RE, García Véscovi E, González CF, Gadea J, Marano MR. A serralysin-like protein of Candidatus Liberibacter asiaticus modulates components of the bacterial extracellular matrix. Front Microbiol 2022; 13:1006962. [DOI: 10.3389/fmicb.2022.1006962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/26/2022] [Indexed: 11/13/2022] Open
Abstract
Huanglongbing (HLB), the current major threat for Citrus species, is caused by intracellular alphaproteobacteria of the genus Candidatus Liberibacter (CaL), with CaL asiaticus (CLas) being the most prevalent species. This bacterium inhabits phloem cells and is transmitted by the psyllid Diaphorina citri. A gene encoding a putative serralysin-like metalloprotease (CLIBASIA_01345) was identified in the CLas genome. The expression levels of this gene were found to be higher in citrus leaves than in psyllids, suggesting a function for this protease in adaptation to the plant environment. Here, we study the putative role of CLas-serralysin (Las1345) as virulence factor. We first assayed whether Las1345 could be secreted by two different surrogate bacteria, Rhizobium leguminosarum bv. viciae A34 (A34) and Serratia marcescens. The protein was detected only in the cellular fraction of A34 and S. marcescens expressing Las1345, and increased protease activity of those bacteria by 2.55 and 4.25-fold, respectively. In contrast, Las1345 expressed in Nicotiana benthamiana leaves did not show protease activity nor alterations in the cell membrane, suggesting that Las1345 do not function as a protease in the plant cell. Las1345 expression negatively regulated cell motility, exopolysaccharide production, and biofilm formation in Xanthomonas campestris pv. campestris (Xcc). This bacterial phenotype was correlated with reduced growth and survival on leaf surfaces as well as reduced disease symptoms in N. benthamiana and Arabidopsis. These results support a model where Las1345 could modify extracellular components to adapt bacterial shape and appendages to the phloem environment, thus contributing to virulence.
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Mbiza NIT, Hu Z, Zhang H, Zhang Y, Luo X, Wang Y, Wang Y, Liu T, Li J, Wang X, Zhang J, Yu Y. GhCalS5 is involved in cotton response to aphid attack through mediating callose formation. FRONTIERS IN PLANT SCIENCE 2022; 13:892630. [PMID: 35937318 PMCID: PMC9350506 DOI: 10.3389/fpls.2022.892630] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Callose synthase plays an essential role in plant growth and development and in response to all sorts of stresses through regulating callose formation. However, few research about the function and mechanism of the insect resistance of callose synthase genes have been reported in cotton. In this study, a cotton callose synthase gene GhCalS5 was cloned, and its function and mechanism of resistance to cotton aphids were analyzed. The expression of GhCalS5 was significantly upregulated in both, leaves and stems of cotton plants at 48 h after cotton aphid infestation and in the leaves of cotton plants at 24 h after salicylic acid treatment. The overexpression of GhCalS5 enhanced cotton resistance to cotton aphids. Expectedly silencing of GhCalS5 reduced cotton resistance to cotton aphids. Overexpression of GhCalS5 enhanced callose formation in cotton leaves. Our results suggest that GhCalS5 is involved in cotton resistance against cotton aphids by influencing callose formation.
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Affiliation(s)
| | - Zongwei Hu
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Haoran Zhang
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Yi Zhang
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Xincheng Luo
- College of Life Sciences, Yangtze University, Jingzhou, China
| | - Yuxue Wang
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Yi Wang
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Ting Liu
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Jianping Li
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Xiangping Wang
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Jianmin Zhang
- College of Agriculture, Institute of Entomology, Yangtze University, Jingzhou, China
| | - Yonghao Yu
- Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Guangxi Academy of Agricultural Sciences, Nanning, China
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Welker S, Pierre M, Santiago JP, Dutt M, Vincent C, Levy A. Phloem transport limitation in Huanglongbing-affected sweet orange is dependent on phloem-limited bacteria and callose. TREE PHYSIOLOGY 2022; 42:379-390. [PMID: 34617106 DOI: 10.1093/treephys/tpab134] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 10/01/2021] [Indexed: 05/11/2023]
Abstract
Huanglongbing (HLB), caused by Candidatus `Liberibacter asiaticus' (CLas), is a phloem-limited disease that disrupts citrus production in affected areas. In HLB-affected plants, phloem sieve plate pores accumulate callose, and leaf carbohydrate export is reduced. However, whether HLB causes a reduction in carbohydrate phloem translocation speed and the quantitative relationships among callose, CLas population and phloem translocation are still unknown. In this work, a procedure was developed to concurrently measure sugar transport, callose deposition and relative pathogen population at different locations throughout the stem. Increasing quantities of CLas genetic material were positively correlated with quantity and density of callose deposits and negatively correlated with phloem translocation speed. Callose deposit quantity was position and rootstock dependent and was negatively correlated with phloem translocation speed, suggesting a localized relationship. Remarkably, callose accumulation and phloem translocation disruption in the scion were dependent on rootstock genotype. Regression results suggested that the interaction of Ct values and number of phloem callose depositions, but not their size or density, explained the effects on translocation speed. Sucrose, starch and sink 14C label allocation data support the interpretation of a transport pathway limitation by CLas infection. This work shows that the interaction of local accumulation of callose and CLas affects phloem transport. Furthermore, the extent of this accumulation is attenuated by the rootstock and provides important information about the disease mechanism of phloem-inhabiting bacteria. Together, these results constitute the first example of a demonstrated transport limitation of phloem function by a microbial infection.
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Affiliation(s)
- Stacy Welker
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA
- Department of Plant Pathology, University of Florida, Gainesville, FL 32611, USA
| | - Myrtho Pierre
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA
| | - James P Santiago
- Plant Resilience Institute and MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
| | - Manjul Dutt
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA
- Department of Horticulture, University of Florida, Gainesville, FL 32611, USA
| | - Christopher Vincent
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA
- Department of Horticulture, University of Florida, Gainesville, FL 32611, USA
| | - Amit Levy
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA
- Department of Plant Pathology, University of Florida, Gainesville, FL 32611, USA
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Feng J, Chen Y, Xiao X, Qu Y, Li P, Lu Q, Huang J. Genome-wide analysis of the CalS gene family in cotton reveals their potential roles in fiber development and responses to stress. PeerJ 2021; 9:e12557. [PMID: 34909280 PMCID: PMC8641485 DOI: 10.7717/peerj.12557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 11/05/2021] [Indexed: 01/18/2023] Open
Abstract
Callose deposition occurs during plant growth and development, as well as when plants are under biotic and abiotic stress. Callose synthase is a key enzyme for the synthesis of callose. In this study, 27, 28, 16, and 15 callose synthase family members were identified in Gossypium hirsutum, Gossypium barbadense, Gossypium raimondii, and Gossypium arboreum using the sequence of Arabidopsis callose synthase. The CalSs were divided into five groups by phylogenetic, gene structure, and conservative motif analysis. The conserved motifs and gene structures of CalSs in each group were highly similar. Based on the analysis of cis-acting elements, it is inferred that GhCalSs were regulated by abiotic stress. WGD/Segmental duplication promoted the amplification of the CalS gene in cotton, and purification selection had an important function in the CalS family. The transcriptome data and qRT-PCR under cold, heat, salt, and PEG treatments showed that GhCalSs were involved in abiotic stress. The expression patterns of GhCalSs were different in various tissues. We predicted that GhCalS4, which was highly expressed in fibers, had an important effect on fiber elongation. Hence, these results help us understand the role of GhCalSs in fiber development and stress response.
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Affiliation(s)
- Jiajia Feng
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China.,School of Biotechnology and Food Engineering, Anyang Institute of Technology, Anyang, Henan, China
| | - Yi Chen
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Xianghui Xiao
- School of Biotechnology and Food Engineering, Anyang Institute of Technology, Anyang, Henan, China
| | - Yunfang Qu
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Pengtao Li
- School of Biotechnology and Food Engineering, Anyang Institute of Technology, Anyang, Henan, China
| | - Quanwei Lu
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China.,School of Biotechnology and Food Engineering, Anyang Institute of Technology, Anyang, Henan, China
| | - Jinling Huang
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China
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Li Q, Canton M, Wu H, Zhang X, Zale J, Mou Z. Efficient artificial microRNA vectors for gene silencing in citrus. PLANT CELL REPORTS 2021; 40:2449-2452. [PMID: 34427747 DOI: 10.1007/s00299-021-02775-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
Three new artificial microRNA vectors were constructed and evaluated, and results showed that these vectors are highly efficient in the silencing of the citrus PHYTOENE DESATURASE gene.
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Affiliation(s)
- Qi Li
- Department of Microbiology and Cell Science, University of Florida, Gainesville, FL, 32611, USA
| | - Michel Canton
- Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Hao Wu
- Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Xudong Zhang
- Department of Microbiology and Cell Science, University of Florida, Gainesville, FL, 32611, USA
| | - Janice Zale
- Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Zhonglin Mou
- Department of Microbiology and Cell Science, University of Florida, Gainesville, FL, 32611, USA.
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Rajput M, Choudhary K, Kumar M, Vivekanand V, Chawade A, Ortiz R, Pareek N. RNA Interference and CRISPR/Cas Gene Editing for Crop Improvement: Paradigm Shift towards Sustainable Agriculture. PLANTS 2021; 10:plants10091914. [PMID: 34579446 PMCID: PMC8467553 DOI: 10.3390/plants10091914] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 01/09/2023]
Abstract
With the rapid population growth, there is an urgent need for innovative crop improvement approaches to meet the increasing demand for food. Classical crop improvement approaches involve, however, a backbreaking process that cannot equipoise with increasing crop demand. RNA-based approaches i.e., RNAi-mediated gene regulation and the site-specific nuclease-based CRISPR/Cas9 system for gene editing has made advances in the efficient targeted modification in many crops for the higher yield and resistance to diseases and different stresses. In functional genomics, RNA interference (RNAi) is a propitious gene regulatory approach that plays a significant role in crop improvement by permitting the downregulation of gene expression by small molecules of interfering RNA without affecting the expression of other genes. Gene editing technologies viz. the clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein (CRISPR/Cas) have appeared prominently as a powerful tool for precise targeted modification of nearly all crops' genome sequences to generate variation and accelerate breeding efforts. In this regard, the review highlights the diverse roles and applications of RNAi and CRISPR/Cas9 system as powerful technologies to improve agronomically important plants to enhance crop yields and increase tolerance to environmental stress (biotic or abiotic). Ultimately, these technologies can prove to be important in view of global food security and sustainable agriculture.
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Affiliation(s)
- Meenakshi Rajput
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer 305801, Rajasthan, India; (M.R.); (K.C.); (M.K.)
| | - Khushboo Choudhary
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer 305801, Rajasthan, India; (M.R.); (K.C.); (M.K.)
| | - Manish Kumar
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer 305801, Rajasthan, India; (M.R.); (K.C.); (M.K.)
| | - V. Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India;
| | - Aakash Chawade
- Department of Plant Breeding, Swedish University of Agricultural Sciences, P.O. Box 101, 230 53 Alnarp, Sweden;
- Correspondence: (A.C.); (N.P.)
| | - Rodomiro Ortiz
- Department of Plant Breeding, Swedish University of Agricultural Sciences, P.O. Box 101, 230 53 Alnarp, Sweden;
| | - Nidhi Pareek
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer 305801, Rajasthan, India; (M.R.); (K.C.); (M.K.)
- Correspondence: (A.C.); (N.P.)
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Lopez Arias DC, Chastellier A, Thouroude T, Bradeen J, Van Eck L, De Oliveira Y, Paillard S, Foucher F, Hibrand-Saint Oyant L, Soufflet-Freslon V. Characterization of black spot resistance in diploid roses with QTL detection, meta-analysis and candidate-gene identification. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2020; 133:3299-3321. [PMID: 32844252 DOI: 10.1007/s00122-020-03670-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 08/11/2020] [Indexed: 05/10/2023]
Abstract
Two environmentally stable QTLs linked to black spot disease resistance in the Rosa wichurana genetic background were detected, in different connected populations, on linkage groups 3 and 5. Co-localization between R-genes and defense response genes was revealed via meta-analysis. The widespread rose black spot disease (BSD) caused by the hemibiotrophic fungus Diplocarpon rosae Wolf. is efficiently controlled with fungicides. However, in the actual context of reducing agrochemical use, the demand for rose bushes with higher levels of resistance has increased. Qualitative resistance conferred by major genes (Rdr genes) has been widely studied but quantitative resistance to BSD requires further investigation. In this study, segregating populations connected through the BSD resistant Rosa wichurana male parent were phenotyped for disease resistance over several years and locations. A pseudo-testcross approach was used, resulting in six parental maps across three populations. A total of 45 individual QTLs with significant effect on BSD resistance were mapped on the male maps (on linkage groups (LG) B3, B4, B5 and B6), and 12 on the female maps (on LG A1, A2, A3, A4 and A5). Two major regions linked to BSD resistance were identified on LG B3 and B5 of the male maps and were integrated into a consensus map built from all three of the male maps. A meta-analysis was used to narrow down the confidence intervals of individual QTLs from three populations by generating meta-QTLs. Two 'hot spots' or meta-QTLs were found per LG, enabling reduction of the confidence interval to 10.42 cM for B3 and 11.47 cM for B5. An expert annotation of NBS-LRR encoding genes of the genome assembly of Hibrand et al. was performed and used to explore potential co-localization with R-genes. Co-localization with defense response genes was also investigated.
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Affiliation(s)
- D C Lopez Arias
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071, Beaucouzé, France.
| | - A Chastellier
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071, Beaucouzé, France
| | - T Thouroude
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071, Beaucouzé, France
| | - J Bradeen
- Department of Plant Pathology and The Stakman-Borlaug Center for Sustainable Plant Health, University of Minnesota, St. Paul, MN, USA
| | - L Van Eck
- Department of Plant Pathology and The Stakman-Borlaug Center for Sustainable Plant Health, University of Minnesota, St. Paul, MN, USA
| | - Yannick De Oliveira
- Génétique Quantitative Et Évolution - Le Moulon, INRAE - Université Paris-Sud - CNRS - AgroParisTech, Ferme du Moulon, 91190, Gif-sur-Yvette, France
| | - S Paillard
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071, Beaucouzé, France
| | - F Foucher
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071, Beaucouzé, France
| | - L Hibrand-Saint Oyant
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071, Beaucouzé, France
| | - V Soufflet-Freslon
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071, Beaucouzé, France
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12
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Poles L, Licciardello C, Distefano G, Nicolosi E, Gentile A, La Malfa S. Recent Advances of In Vitro Culture for the Application of New Breeding Techniques in Citrus. PLANTS (BASEL, SWITZERLAND) 2020; 9:E938. [PMID: 32722179 PMCID: PMC7465985 DOI: 10.3390/plants9080938] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 12/15/2022]
Abstract
Citrus is one of the most important fruit crops in the world. This review will discuss the recent findings related to citrus transformation and regeneration protocols of juvenile and adult explants. Despite the many advances that have been made in the last years (including the use of inducible promoters and site-specific recombination systems), transformation efficiency, and regeneration potential still represent a bottleneck in the application of the new breeding techniques in commercial citrus varieties. The influence of genotype, explant type, and other factors affecting the regeneration and transformation of the most used citrus varieties will be described, as well as some examples of how these processes can be applied to improve fruit quality and resistance to various pathogens and pests, including the potential of using genome editing in citrus. The availability of efficient regeneration and transformation protocols, together with the availability of the source of resistance, is made even more important in light of the fast diffusion of emerging diseases, such as Huanglongbing (HLB), which is seriously challenging citriculture worldwide.
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Affiliation(s)
- Lara Poles
- Food and Environment (Di3A), Department of Agriculture, University of Catania, Via Valdisavoia 5, 95123 Catania, Italy; (L.P.); (G.D.); (E.N.); (S.L.M.)
- CREA, Research Centre for Olive, Fruit and Citrus Crops, Corso Savoia 190, 95024 Acireale, Italy;
| | - Concetta Licciardello
- CREA, Research Centre for Olive, Fruit and Citrus Crops, Corso Savoia 190, 95024 Acireale, Italy;
| | - Gaetano Distefano
- Food and Environment (Di3A), Department of Agriculture, University of Catania, Via Valdisavoia 5, 95123 Catania, Italy; (L.P.); (G.D.); (E.N.); (S.L.M.)
| | - Elisabetta Nicolosi
- Food and Environment (Di3A), Department of Agriculture, University of Catania, Via Valdisavoia 5, 95123 Catania, Italy; (L.P.); (G.D.); (E.N.); (S.L.M.)
| | - Alessandra Gentile
- Food and Environment (Di3A), Department of Agriculture, University of Catania, Via Valdisavoia 5, 95123 Catania, Italy; (L.P.); (G.D.); (E.N.); (S.L.M.)
- College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China
| | - Stefano La Malfa
- Food and Environment (Di3A), Department of Agriculture, University of Catania, Via Valdisavoia 5, 95123 Catania, Italy; (L.P.); (G.D.); (E.N.); (S.L.M.)
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13
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Nehela Y, Killiny N. The unknown soldier in citrus plants: polyamines-based defensive mechanisms against biotic and abiotic stresses and their relationship with other stress-associated metabolites. PLANT SIGNALING & BEHAVIOR 2020; 15:1761080. [PMID: 32408848 PMCID: PMC8570725 DOI: 10.1080/15592324.2020.1761080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 05/07/2023]
Abstract
Citrus plants are challenged by a broad diversity of abiotic and biotic stresses, which definitely alter their growth, development, and productivity. In order to survive the various stressful conditions, citrus plants relay on multi-layered adaptive strategies, among which is the accumulation of stress-associated metabolites that play vital and complex roles in citrus defensive responses. These metabolites included amino acids, organic acids, fatty acids, phytohormones, polyamines (PAs), and other secondary metabolites. However, the contribution of PAs pathways in citrus defense responses is poorly understood. In this review article, we will discuss the recent metabolic, genetic, and molecular evidence illustrating the potential roles of PAs in citrus defensive responses against biotic and abiotic stressors. We believe that PAs-based defensive role, against biotic and abiotic stress in citrus, is involving the interaction with other stress-associated metabolites, particularly phytohormones. The knowledge gained so far about PAs-based defensive responses in citrus underpins our need for further genetic manipulation of PAs biosynthetic genes to produce transgenic citrus plants with modulated PAs content that may enhance the tolerance of citrus plants against stressful conditions. In addition, it provides valuable information for the potential use of PAs or their synthetic analogs and their emergence as a promising approach to practical applications in citriculture to enhance stress tolerance in citrus plants.
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Affiliation(s)
- Yasser Nehela
- Citrus Research and Education Center and Department of Plant Pathology, IFAS, University of Florida, Lake Alfred, FL, USA
| | - Nabil Killiny
- Citrus Research and Education Center and Department of Plant Pathology, IFAS, University of Florida, Lake Alfred, FL, USA
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14
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Roeschlin RA, Uviedo F, García L, Molina MC, Favaro MA, Chiesa MA, Tasselli S, Franco‐Zorrilla JM, Forment J, Gadea J, Marano MR. PthA4 AT , a 7.5-repeats transcription activator-like (TAL) effector from Xanthomonas citri ssp. citri, triggers citrus canker resistance. MOLECULAR PLANT PATHOLOGY 2019; 20:1394-1407. [PMID: 31274237 PMCID: PMC6792138 DOI: 10.1111/mpp.12844] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Transcription activator-like effectors (TALEs) are important effectors of Xanthomonas spp. that manipulate the transcriptome of the host plant, conferring susceptibility or resistance to bacterial infection. Xanthomonas citri ssp. citri variant AT (X. citri AT ) triggers a host-specific hypersensitive response (HR) that suppresses citrus canker development. However, the bacterial effector that elicits this process is unknown. In this study, we show that a 7.5-repeat TALE is responsible for triggering the HR. PthA4AT was identified within the pthA repertoire of X. citri AT followed by assay of the effects on different hosts. The mode of action of PthA4AT was characterized using protein-binding microarrays and testing the effects of deletion of the nuclear localization signals and activation domain on plant responses. PthA4AT is able to bind DNA and activate transcription in an effector binding element-dependent manner. Moreover, HR requires PthA4AT nuclear localization, suggesting the activation of executor resistance (R) genes in host and non-host plants. This is the first case where a TALE of unusually short length performs a biological function by means of its repeat domain, indicating that the action of these effectors to reprogramme the host transcriptome following nuclear localization is not limited to 'classical' TALEs.
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Affiliation(s)
- Roxana Andrea Roeschlin
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
- Present address:
Facultad de Ciencias AgropecuariasUniversidad Católica de Santa FeLudueña 612S3560DYRSanta FeArgentina
| | - Facundo Uviedo
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
| | - Lucila García
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
| | - María Celeste Molina
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
| | - María Alejandra Favaro
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Present address:
Facultad de Ciencias AgrariasUniversidad Nacional del Litoral, Producción VegetalKreder 2805, 3080 HOF EsperanzaSanta FeArgentina
| | - María Amalia Chiesa
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Present address:
Laboratorio de Fisiología VegetalInstituto de Investigaciones en Ciencias Agrarias de Rosario (IICAR)‐UNR/CONICETParque Villarino S/N2125Zavalla, Santa FeArgentina
| | - Sabrina Tasselli
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
| | - José Manuel Franco‐Zorrilla
- Unidad Genómica, Centro Nacional de Biotecnología (CNB)‐Consejo Superior de Investigaciones Científicas (CSIC)Darwin 328049MadridEspaña
| | - Javier Forment
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Universidad Politécnica de Valencia‐CSICIngeniero Fausto Elio S/N.46022ValenciaEspaña
| | - José Gadea
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Universidad Politécnica de Valencia‐CSICIngeniero Fausto Elio S/N.46022ValenciaEspaña
| | - María Rosa Marano
- Instituto de Biología Molecular y Celular de Rosario (IBR)‐Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
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15
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Rivas-Sendra A, Corral-Martínez P, Porcel R, Camacho-Fernández C, Calabuig-Serna A, Seguí-Simarro JM. Embryogenic competence of microspores is associated with their ability to form a callosic, osmoprotective subintinal layer. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:1267-1281. [PMID: 30715473 PMCID: PMC6382338 DOI: 10.1093/jxb/ery458] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 12/19/2018] [Indexed: 05/05/2023]
Abstract
Microspore embryogenesis is an experimental morphogenic pathway with important applications in basic research and applied plant breeding, but its genetic, cellular, and molecular bases are poorly understood. We applied a multidisciplinary approach using confocal and electron microscopy, detection of Ca2+, callose, and cellulose, treatments with caffeine, digitonin, and endosidin7, morphometry, qPCR, osmometry, and viability assays in order to study the dynamics of cell wall formation during embryogenesis induction in a high-response rapeseed (Brassica napus) line and two recalcitrant rapeseed and eggplant (Solanum melongena) lines. Formation of a callose-rich subintinal layer (SL) was common to microspore embryogenesis in the different genotypes. However, this process was directly related to embryogenic response, being greater in high-response genotypes. A link could be established between Ca2+ influx, abnormal callose/cellulose deposition, and the genotype-specific embryogenic competence. Callose deposition in inner walls and SLs are independent processes, regulated by different callose synthases. Viability and control of internal osmolality are also related to SL formation. In summary, we identified one of the causes of recalcitrance to embryogenesis induction: a reduced or absent protective SL. In responding genotypes, SLs are markers for changes in cell fate and serve as osmoprotective barriers to increase viability in imbalanced in vitro environments. Genotype-specific differences relate to different responses against abiotic (heat/osmotic) stresses.
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Affiliation(s)
- Alba Rivas-Sendra
- Cell Biology Group - COMAV Institute, Universitat Politècnica de València (UPV), Valencia, Spain
- Present address: Universidad Regional Amazónica IKIAM, Tena, Ecuador
| | - Patricia Corral-Martínez
- Cell Biology Group - COMAV Institute, Universitat Politècnica de València (UPV), Valencia, Spain
| | - Rosa Porcel
- Cell Biology Group - COMAV Institute, Universitat Politècnica de València (UPV), Valencia, Spain
| | | | - Antonio Calabuig-Serna
- Cell Biology Group - COMAV Institute, Universitat Politècnica de València (UPV), Valencia, Spain
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16
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Chiesa MA, Roeschlin RA, Favaro MA, Uviedo F, Campos‐Beneyto L, D’Andrea R, Gadea J, Marano MR. Plant responses underlying nonhost resistance of Citrus limon against Xanthomonas campestris pv. campestris. MOLECULAR PLANT PATHOLOGY 2019; 20:254-269. [PMID: 30260546 PMCID: PMC6637874 DOI: 10.1111/mpp.12752] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Citrus is an economically important fruit crop that is severely afflicted by citrus canker, a disease caused by Xanthomonas citri ssp. citri (X. citri); thus, new sustainable strategies to manage this disease are needed. Although all Citrus spp. are susceptible to this pathogen, they are resistant to other Xanthomonas species, exhibiting non-host resistance (NHR), for example, to the brassica pathogen X. campestris pv. campestris (Xcc) and a gene-for-gene host defence response (HDR) to the canker-causing X. fuscans ssp. aurantifolii (Xfa) strain C. Here, we examine the plant factors associated with the NHR of C. limon to Xcc. We show that Xcc induced asymptomatic type I NHR, allowing the bacterium to survive in a stationary phase in the non-host tissue. In C. limon, this NHR shared some similarities with HDR; both defence responses interfered with biofilm formation, and were associated with callose deposition, induction of the salicylic acid (SA) signalling pathway and the repression of abscisic acid (ABA) signalling. However, greater stomatal closure was seen during NHR than during HDR, together with different patterns of accumulation of reactive oxygen species and phenolic compounds and the expression of secondary metabolites. Overall, these differences, independent of Xcc type III effector proteins, could contribute to the higher protection elicited against canker development. We propose that Xcc may have the potential to steadily activate inducible defence responses. An understanding of these plant responses (and their triggers) may allow the development of a sustained and sustainable resistance to citrus canker.
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Affiliation(s)
- María A. Chiesa
- Instituto de Biología Molecular y Celular de Rosario (IBR)—Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
- Laboratorio de Fisiología VegetalInstituto de Investigaciones en Ciencias Agrarias de Rosario (IICAR)‐UNR/CONICETParque Villarino S/N, 2125 ZavallaSanta FeArgentina
| | - Roxana A. Roeschlin
- Instituto de Biología Molecular y Celular de Rosario (IBR)—Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
- Facultad de Ciencias AgropecuariasUniversidad Católica de Santa FeLudueña 612, S3560DYR ReconquistaSanta FeArgentina
| | - María A. Favaro
- Instituto de Biología Molecular y Celular de Rosario (IBR)—Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
- Facultad de Ciencias AgrariasUniversidad Nacional del LitoralProducción Vegetal, Kreder 2805, 3080 HOF EsperanzaSanta FeArgentina
| | - Facundo Uviedo
- Instituto de Biología Molecular y Celular de Rosario (IBR)—Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
| | - Laura Campos‐Beneyto
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Universidad Politécnica de Valencia‐C.S.I.CIngeniero Fausto Elio, S/N46022ValenciaEspaña
| | - Rodrigo D’Andrea
- Instituto de Biología Molecular y Celular de Rosario (IBR)—Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
| | - José Gadea
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Universidad Politécnica de Valencia‐C.S.I.CIngeniero Fausto Elio, S/N46022ValenciaEspaña
| | - María R. Marano
- Instituto de Biología Molecular y Celular de Rosario (IBR)—Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Ocampo y Esmeralda S/NS2002LRKRosarioArgentina
- Área Virología, Facultad de Ciencias Bioquímicas y FarmacéuticasUniversidad Nacional de Rosario (UNR)Suipacha 590S2002LRKRosarioArgentina
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17
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Singh R, Lee S, Ortega L, Ramu VS, Senthil-Kumar M, Blancaflor EB, Rojas CM, Mysore KS. Two Chloroplast-Localized Proteins: AtNHR2A and AtNHR2B, Contribute to Callose Deposition During Nonhost Disease Resistance in Arabidopsis. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2018; 31:1280-1290. [PMID: 29877165 DOI: 10.1094/mpmi-04-18-0094-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Plants are naturally resistant to most pathogens through a broad and durable defense response called nonhost disease resistance. Nonhost disease resistance is a complex process that includes preformed physical and chemical barriers and induced responses. In spite of its importance, many components of nonhost disease resistance remain to be identified and characterized. Using virus-induced gene silencing in Nicotiana benthamiana, we discovered a novel gene that we named NbNHR2 (N. benthamiana nonhost resistance 2). NbNHR2-silenced plants were susceptible to the nonadapted pathogen Pseudomonas syringae pv. tomato T1, which does not cause disease in wild-type or nonsilenced N. benthamiana plants. We found two orthologous genes in Arabidopsis thaliana: AtNHR2A and AtNHR2B. Similar to the results obtained in N. benthamiana, Atnhr2a and Atnhr2b mutants were susceptible to the nonadapted bacterial pathogen of A. thaliana, P. syringae pv. tabaci. We further found that these mutants were also defective in callose deposition. AtNHR2A and AtNHR2B fluorescent protein fusions transiently expressed in N. benthamiana localized predominantly to chloroplasts and a few unidentified dynamic puncta. RFP-AtNHR2A and AtNHR2B-GFP displayed overlapping signals in chloroplasts, indicating that the two proteins could interact, an idea supported by coimmunoprecipitation studies. We propose that AtNHR2A and AtNHR2B are new components of a chloroplast-signaling pathway that activates callose deposition to the cell wall in response to bacterial pathogens.
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Affiliation(s)
- Raksha Singh
- 1 Department of Plant Pathology, University of Arkansas, Fayetteville, AR 72701, U.S.A
| | - Seonghee Lee
- 2 Noble Research Institute, LLC., Ardmore, OK 73401, U.S.A
| | - Laura Ortega
- 1 Department of Plant Pathology, University of Arkansas, Fayetteville, AR 72701, U.S.A
| | - Vemanna S Ramu
- 2 Noble Research Institute, LLC., Ardmore, OK 73401, U.S.A
| | | | | | - Clemencia M Rojas
- 1 Department of Plant Pathology, University of Arkansas, Fayetteville, AR 72701, U.S.A
- 2 Noble Research Institute, LLC., Ardmore, OK 73401, U.S.A
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18
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Liu F, Zou Z, Fernando WGD. Characterization of Callose Deposition and Analysis of the Callose Synthase Gene Family of Brassica napus in Response to Leptosphaeria maculans. Int J Mol Sci 2018; 19:ijms19123769. [PMID: 30486431 PMCID: PMC6320764 DOI: 10.3390/ijms19123769] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/16/2018] [Accepted: 11/22/2018] [Indexed: 11/16/2022] Open
Abstract
Callose plays a critical role in different biological processes including development as well as in the response to multiple biotic and abiotic stresses. In this study, we characterized the callose deposition in cotyledons of different Brassica napus varieties post-inoculated with different Leptosphaeria maculans isolates. Further, members of the callose synthase gene were identified from the whole genome of B. napus using the 12 Arabidopsis thaniana callose synthase protein sequences, and were then classified into three groups based on their phylogenetic relationships. Chromosomal location and duplication patterns indicated uneven distribution and segmental duplication patterns of BnCalS genes in the B. napus genome. Subsequently, gene structures, conserved domains analysis, and protein properties were analyzed for BnCalS genes. In addition, 12 B. napus orthologs of the AtCalS were selected for investigating the tissue expression pattern, indicating diverse expression patterns for these BnCalS genes. Responses of the selected 12 orthologs and all the BnCalS genes were characterized in the different types (AvrLm1-Rlm1, AvrLm4-Rlm4, AvrLepR1-LepR1) of B. napus–L. maculans interactions and B. napus-Leptosphaeria biglobosa interactions, implying their potential roles in response to Leptosphaeria infection.
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Affiliation(s)
- Fei Liu
- Department of Plant Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
| | - Zhongwei Zou
- Department of Plant Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
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19
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Dai F, Wang Z, Li Z, Luo G, Wang Y, Tang C. Transcriptomic and proteomic analyses of mulberry (Morus atropurpurea) fruit response to Ciboria carunculoides. J Proteomics 2018; 193:142-153. [PMID: 30315889 DOI: 10.1016/j.jprot.2018.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 09/09/2018] [Accepted: 10/09/2018] [Indexed: 01/09/2023]
Abstract
The aim of this work was to gain insights into the molecular mechanisms and dynamics of the mulberry (Morus atropurpurea) fruit response to Ciboria carunculoides infection. A transcriptomic and proteomic study was carried out based on RNA sequencing and isobaric tags for relative and absolute quantification analysis, respectively. These data were then validated using quantitative real-time PCR and multiple reaction monitoring assays. Comparative analyses revealed that 9.0% of the transcriptome and 20.8% of the proteome were differentially regulated after C. carunculoides infection at the early stage (stage 1) and middle stage (stage 2), but correlation analysis revealed that only 145 genes were differentially regulated at both the transcriptome and proteome levels. The combined transcriptome and proteome analysis showed that plant hormone signal transduction, calcium-mediated defense signaling, transcription factors, and secondary metabolites were stimulated, whereas photosynthesis and cellular growth-related metabolism were suppressed after C. carunculoides infection. These finding provide theoretical foundation for disease resistance breeding of C. carunculoides. BIOLOGICAL SIGNIFICANCE: Ciboria carunculoides is a major fungal pathogen that infects mulberry fruit, leading to extensive damage and productivity loss. Despite this major impact, the mulberry fruit response to C. carunculoides infection has yet to be characterized. This study provides the first system-wide datasets with which to examine changes in the transcriptome and proteome after C. carunculoides infection in mulberry fruit. The results showed that plant hormone signal transduction, calcium-mediated defense signaling, and other pathways were stimulated, whereas photosynthesis and cellular growth-related metabolism were suppressed by C. carunculoides. These results will lead to a better understanding of the molecular mechanisms triggered in mulberry fruit in response to C. carunculoides infection and will provide new molecular targets for regulating defense responses to fungal pathogens in berry fruits.
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Affiliation(s)
- Fanwei Dai
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Zhenjiang Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Zhiyi Li
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Guoqing Luo
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Yi Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Cuiming Tang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China.
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Zotti M, Dos Santos EA, Cagliari D, Christiaens O, Taning CNT, Smagghe G. RNA interference technology in crop protection against arthropod pests, pathogens and nematodes. PEST MANAGEMENT SCIENCE 2018; 74:1239-1250. [PMID: 29194942 DOI: 10.1002/ps.4813] [Citation(s) in RCA: 174] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/09/2017] [Accepted: 11/22/2017] [Indexed: 05/03/2023]
Abstract
Scientists have made significant progress in understanding and unraveling several aspects of double-stranded RNA (dsRNA)-mediated gene silencing during the last two decades. Now that the RNA interference (RNAi) mechanism is well understood, it is time to consider how to apply the acquired knowledge to agriculture and crop protection. Some RNAi-based products are already available for farmers and more are expected to reach the market soon. Tailor-made dsRNA as an active ingredient for biopesticide formulations is considered a raw material that can be used for diverse purposes, from pest control and bee protection against viruses to pesticide resistance management. The RNAi mechanism works at the messenger RNA (mRNA) level, exploiting a sequence-dependent mode of action, which makes it unique in potency and selectivity compared with conventional agrochemicals. Furthermore, the use of RNAi in crop protection can be achieved by employing plant-incorporated protectants through plant transformation, but also by non-transformative strategies such as the use of formulations of sprayable RNAs as direct control agents, resistance factor repressors or developmental disruptors. In this review, RNAi is presented in an agricultural context (discussing products that have been launched on the market or will soon be available), and we go beyond the classical presentation of successful examples of RNAi in pest-insect control and comprehensively explore its potential for the control of plant pathogens, nematodes and mites, and to fight against diseases and parasites in beneficial insects. Moreover, we also discuss its use as a repressor for the management of pesticide-resistant weeds and insects. Finally, this review reports on the advances in non-transformative dsRNA delivery and the production costs of dsRNA, and discusses environmental considerations. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Moises Zotti
- Department of Crop Protection, Molecular Entomology, Federal University of Pelotas, Pelotas, Brazil
| | - Ericmar Avila Dos Santos
- Department of Crop Protection, Molecular Entomology, Federal University of Pelotas, Pelotas, Brazil
| | - Deise Cagliari
- Department of Crop Protection, Molecular Entomology, Federal University of Pelotas, Pelotas, Brazil
| | - Olivier Christiaens
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Clauvis Nji Tizi Taning
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Guy Smagghe
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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Chen J, Hu L, Sun L, Lin B, Huang K, Zhuo K, Liao J. A novel Meloidogyne graminicola effector, MgMO237, interacts with multiple host defence-related proteins to manipulate plant basal immunity and promote parasitism. MOLECULAR PLANT PATHOLOGY 2018; 19:1942-1955. [PMID: 29485753 PMCID: PMC6638000 DOI: 10.1111/mpp.12671] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/25/2018] [Accepted: 02/26/2018] [Indexed: 05/04/2023]
Abstract
Plant-parasitic nematodes can secrete effector proteins into the host tissue to facilitate their parasitism. In this study, we report a novel effector protein, MgMO237, from Meloidogyne graminicola, which is exclusively expressed within the dorsal oesophageal gland cell and markedly up-regulated in parasitic third-/fourth-stage juveniles of M. graminicola. Transient expression of MgMO237 in protoplasts from rice roots showed that MgMO237 was localized in the cytoplasm and nucleus of the host cells. Rice plants overexpressing MgMO237 showed an increased susceptibility to M. graminicola. In contrast, rice plants expressing RNA interference vectors targeting MgMO237 showed an increased resistance to M. graminicola. In addition, yeast two-hybrid and co-immunoprecipitation assays showed that MgMO237 interacted specifically with three rice endogenous proteins, i.e. 1,3-β-glucan synthase component (OsGSC), cysteine-rich repeat secretory protein 55 (OsCRRSP55) and pathogenesis-related BetvI family protein (OsBetvI), which are all related to host defences. Moreover, MgMO237 can suppress host defence responses, including the expression of host defence-related genes, cell wall callose deposition and the burst of reactive oxygen species. These results demonstrate that the effector MgMO237 probably promotes the parasitism of M. graminicola by interacting with multiple host defence-related proteins and suppressing plant basal immunity in the later parasitic stages of nematodes.
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Affiliation(s)
- Jiansong Chen
- Laboratory of Plant NematologySouth China Agricultural UniversityGuangzhou510642China
- Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou510642China
| | - Lili Hu
- Laboratory of Plant NematologySouth China Agricultural UniversityGuangzhou510642China
- Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou510642China
| | - Longhua Sun
- Laboratory of Plant NematologySouth China Agricultural UniversityGuangzhou510642China
- Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou510642China
| | - Borong Lin
- Laboratory of Plant NematologySouth China Agricultural UniversityGuangzhou510642China
- Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou510642China
| | - Kun Huang
- Laboratory of Plant NematologySouth China Agricultural UniversityGuangzhou510642China
| | - Kan Zhuo
- Laboratory of Plant NematologySouth China Agricultural UniversityGuangzhou510642China
- Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou510642China
| | - Jinling Liao
- Laboratory of Plant NematologySouth China Agricultural UniversityGuangzhou510642China
- Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou510642China
- Department of Eco‐engineering, Guangdong Eco‐Engineering PolytechnicGuangzhou510520China
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22
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Roeschlin RA, Favaro MA, Chiesa MA, Alemano S, Vojnov AA, Castagnaro AP, Filippone MP, Gmitter FG, Gadea J, Marano MR. Resistance to citrus canker induced by a variant of Xanthomonas citri ssp. citri is associated with a hypersensitive cell death response involving autophagy-associated vacuolar processes. MOLECULAR PLANT PATHOLOGY 2017; 18:1267-1281. [PMID: 27647752 PMCID: PMC6638218 DOI: 10.1111/mpp.12489] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 07/25/2016] [Accepted: 08/31/2016] [Indexed: 05/14/2023]
Abstract
Xanthomonas citri ssp. citri (X. citri) is the causal agent of Asiatic citrus canker, a disease that seriously affects most commercially important Citrus species worldwide. We have identified previously a natural variant, X. citri AT , that triggers a host-specific defence response in Citrus limon. However, the mechanisms involved in this canker disease resistance are unknown. In this work, the defence response induced by X. citri AT was assessed by transcriptomic, physiological and ultrastructural analyses, and the effects on bacterial biofilm formation were monitored in parallel. We show that X. citri AT triggers a hypersensitive response associated with the interference of biofilm development and arrest of bacterial growth in C. limon. This plant response involves an extensive transcriptional reprogramming, setting in motion cell wall reinforcement, the oxidative burst and the accumulation of salicylic acid (SA) and phenolic compounds. Ultrastructural analyses revealed subcellular changes involving the activation of autophagy-associated vacuolar processes. Our findings show the activation of SA-dependent defence in response to X. citri AT and suggest a coordinated regulation between the SA and flavonoid pathways, which is associated with autophagy mechanisms that control pathogen invasion in C. limon. Furthermore, this defence response protects C. limon plants from disease on subsequent challenges by pathogenic X. citri. This knowledge will allow the rational exploitation of the plant immune system as a biotechnological approach for the management of the disease.
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Affiliation(s)
- Roxana A. Roeschlin
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
| | - María A. Favaro
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
| | - María A. Chiesa
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
| | - Sergio Alemano
- Laboratorio de Fisiología Vegetal, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico‐Químicas y NaturalesUniversidad Nacional de Río Cuarto, Ruta 36 Km. 601Río Cuarto X5804ZABCórdobaArgentina
| | - Adrián A. Vojnov
- Instituto de Ciencia y Tecnología Dr. Cesar MilsteinFundación Pablo Cassará‐CONICET, Saladillo 2468Ciudad de Buenos AiresC1440FFXArgentina
| | - Atilio P. Castagnaro
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITA‐NOA)Estación Experimental Agroindustrial Obispo Colombres (EEAOC)‐CONICET, Av. William Cross 3150Las TalitasTucumánT4101XACArgentina
| | - María P. Filippone
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITA‐NOA)Estación Experimental Agroindustrial Obispo Colombres (EEAOC)‐CONICET, Av. William Cross 3150Las TalitasTucumánT4101XACArgentina
| | - Frederick G. Gmitter
- Citrus Research and Education Center (CREC)University of Florida, 700 Experiment Station Rd.Lake AlfredFL33850USA
| | - José Gadea
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Universidad Politécnica de Valencia (UPV)‐Consejo Superior de Investigaciones Científicas (CSIC), Ciudad Politécnica de la Innovación (CPI), Ed. 8E, C/Ingeniero Fausto Elio s/nValencia46022Spain
| | - María R. Marano
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
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Bianco MI, Toum L, Yaryura PM, Mielnichuk N, Gudesblat GE, Roeschlin R, Marano MR, Ielpi L, Vojnov AA. Xanthan Pyruvilation Is Essential for the Virulence of Xanthomonas campestris pv. campestris. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2016; 29:688-699. [PMID: 27464764 DOI: 10.1094/mpmi-06-16-0106-r] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Xanthan, the main exopolysaccharide (EPS) synthesized by Xanthomonas spp., contributes to bacterial stress tolerance and enhances attachment to plant surfaces by helping in biofilm formation. Therefore, xanthan is essential for successful colonization and growth in planta and has also been proposed to be involved in the promotion of pathogenesis by calcium ion chelation and, hence, in the suppression of the plant defense responses in which this cation acts as a signal. The aim of this work was to study the relationship between xanthan structure and its role as a virulence factor. We analyzed four Xanthomonas campestris pv. campestris mutants that synthesize structural variants of xanthan. We found that the lack of acetyl groups that decorate the internal mannose residues, ketal-pyruvate groups, and external mannose residues affects bacterial adhesion and biofilm architecture. In addition, the mutants that synthesized EPS without pyruvilation or without the external mannose residues did not develop disease symptoms in Arabidopsis thaliana. We also observed that the presence of the external mannose residues and, hence, pyruvilation is required for xanthan to suppress callose deposition as well as to interfere with stomatal defense. In conclusion, pyruvilation of xanthan seems to be essential for Xanthomonas campestris pv. campestris virulence.
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Affiliation(s)
- María Isabel Bianco
- 1 Instituto de Ciencia y Tecnología Dr. César Milstein, Fundación Pablo Cassará, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Saladillo 2468 (C1440FFX), Ciudad de Buenos Aires, Argentina
| | - Laila Toum
- 1 Instituto de Ciencia y Tecnología Dr. César Milstein, Fundación Pablo Cassará, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Saladillo 2468 (C1440FFX), Ciudad de Buenos Aires, Argentina
| | - Pablo Marcelo Yaryura
- 2 Centro de Investigaciones y Transferencia (CIT Villa María), CONICET-Instituto de Ciencias Básicas y Aplicadas, Universidad Nacional de Villa María. Av. Arturo Jauretche 1555, (5900), Villa María, Córdoba, Argentina
| | - Natalia Mielnichuk
- 1 Instituto de Ciencia y Tecnología Dr. César Milstein, Fundación Pablo Cassará, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Saladillo 2468 (C1440FFX), Ciudad de Buenos Aires, Argentina
| | - Gustavo Eduardo Gudesblat
- 1 Instituto de Ciencia y Tecnología Dr. César Milstein, Fundación Pablo Cassará, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Saladillo 2468 (C1440FFX), Ciudad de Buenos Aires, Argentina
- 3 Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Departamento de Biodiversidad y Biología Experimental (DBBE), CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Buenos Aires (C1428EGA), Argentina
| | - Roxana Roeschlin
- 4 Instituto de Biología Molecular y Celular de Rosario (IBR)-CONICET, Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/n, (S2000FHN) Rosario, Argentina; and
| | - María Rosa Marano
- 4 Instituto de Biología Molecular y Celular de Rosario (IBR)-CONICET, Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/n, (S2000FHN) Rosario, Argentina; and
| | - Luis Ielpi
- 5 Laboratorio de Genética Bacteriana, Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires (IIBBA)-CONICET, Patricias Argentinas 435 (C1405BWE), Ciudad de Buenos Aires, Argentina
| | - Adrián A Vojnov
- 1 Instituto de Ciencia y Tecnología Dr. César Milstein, Fundación Pablo Cassará, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Saladillo 2468 (C1440FFX), Ciudad de Buenos Aires, Argentina
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Yu Y, Jiao L, Fu S, Yin L, Zhang Y, Lu J. Callose Synthase Family Genes Involved in the Grapevine Defense Response to Downy Mildew Disease. PHYTOPATHOLOGY 2016; 106:56-64. [PMID: 26474330 DOI: 10.1094/phyto-07-15-0166-r] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The deposition of callose is a common plant defense response to intruding pathogens and part of the plant's innate immunity. In this study, eight grapevine callose synthase (CalS) genes were identified and characterized. To investigate biological function of CalS in grapevine against the infection of Plasmopara viticola, expression patterns of grapevine CalS family genes were analyzed among resistant/susceptible cultivars. After P. viticola infection, expression of CalS1, 3, 7, 8, 9, 10, and 11 were significantly modified among the grapevine cultivars. For example, the expression of CalS1 and CalS10 were greatly increased in downy mildew (DM)-immune Muscadinia rotundifolia 'Carlos' and 'Noble'. Transient expression assay with promoters of the CalS1 and CalS10 genes confirmed that they were regulated by the oomycete pathogen P. viticola. CalS1 promoter activity was also significantly up-regulated by ABA in DM-immune M. rotundifolia 'Noble', but down-regulated in DM-susceptible Vitis vinifera 'Chardonnay'. The CalS1 promoter, however, was also down-regulated by GA in 'Chardonnay', but not affected in 'Noble'. The promoter activity of CalS10 was significantly up-regulated by GA in 'Chardonnay', but not regulated by ABA at all. It is proposed that CalS1 and CalS10 were involved in grapevine defense against DM disease.
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Affiliation(s)
- Ying Yu
- First, second, third, fourth, fifth, and sixth authors: The Viticulture and Enology Program, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; first author: Institute of Genetics and Developmental Biology, China Academy of Science; and fourth author: Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Guangxi Academy of Agricultural Sciences
| | - Li Jiao
- First, second, third, fourth, fifth, and sixth authors: The Viticulture and Enology Program, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; first author: Institute of Genetics and Developmental Biology, China Academy of Science; and fourth author: Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Guangxi Academy of Agricultural Sciences
| | - Shufang Fu
- First, second, third, fourth, fifth, and sixth authors: The Viticulture and Enology Program, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; first author: Institute of Genetics and Developmental Biology, China Academy of Science; and fourth author: Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Guangxi Academy of Agricultural Sciences
| | - Ling Yin
- First, second, third, fourth, fifth, and sixth authors: The Viticulture and Enology Program, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; first author: Institute of Genetics and Developmental Biology, China Academy of Science; and fourth author: Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Guangxi Academy of Agricultural Sciences
| | - Yali Zhang
- First, second, third, fourth, fifth, and sixth authors: The Viticulture and Enology Program, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; first author: Institute of Genetics and Developmental Biology, China Academy of Science; and fourth author: Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Guangxi Academy of Agricultural Sciences
| | - Jiang Lu
- First, second, third, fourth, fifth, and sixth authors: The Viticulture and Enology Program, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; first author: Institute of Genetics and Developmental Biology, China Academy of Science; and fourth author: Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Guangxi Academy of Agricultural Sciences
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Kamthan A, Chaudhuri A, Kamthan M, Datta A. Small RNAs in plants: recent development and application for crop improvement. FRONTIERS IN PLANT SCIENCE 2015; 6:208. [PMID: 25883599 PMCID: PMC4382981 DOI: 10.3389/fpls.2015.00208] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 03/16/2015] [Indexed: 05/19/2023]
Abstract
The phenomenon of RNA interference (RNAi) which involves sequence-specific gene regulation by small non-coding RNAs, i.e., small interfering RNA (siRNA) and microRNA (miRNA) has emerged as one of most powerful approaches for crop improvement. RNAi based on siRNA is one of the widely used tools of reverse genetics which aid in revealing gene functions in many species. This technology has been extensively applied to alter the gene expression in plants with an aim to achieve desirable traits. RNAi has been used for enhancing the crop yield and productivity by manipulating the gene involved in biomass, grain yield and enhanced shelf life of fruits and vegetables. It has also been applied for developing resistance against various biotic (bacteria, fungi, viruses, nematodes, insects) and abiotic stresses (drought, salinity, cold, etc.). Nutritional improvements of crops have also been achieved by enriching the crops with essential amino acids, fatty acids, antioxidants and other nutrients beneficial for human health or by reducing allergens or anti-nutrients. microRNAs are key regulators of important plant processes like growth, development, and response to various stresses. In spite of similarity in size (20-24 nt), miRNA differ from siRNA in precursor structures, pathway of biogenesis, and modes of action. This review also highlights the miRNA based genetic modification technology where various miRNAs/artificial miRNAs and their targets can be utilized for improving several desirable plant traits. microRNA based strategies are much efficient than siRNA-based RNAi strategies due to its specificity and less undesirable off target effects. As per the FDA guidelines, small RNA (sRNA) based transgenics are much safer for consumption than those over-expressing proteins. This review thereby summarizes the emerging advances and achievement in the field of sRNAs and its application for crop improvement.
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Affiliation(s)
- Ayushi Kamthan
- National Institute of Plant Genome ResearchNew Delhi, India
| | | | - Mohan Kamthan
- Indian Institute of Toxicology ResearchLucknow, India
| | - Asis Datta
- National Institute of Plant Genome ResearchNew Delhi, India
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26
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Saurabh S, Vidyarthi AS, Prasad D. RNA interference: concept to reality in crop improvement. PLANTA 2014; 239:543-64. [PMID: 24402564 DOI: 10.1007/s00425-013-2019-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Accepted: 12/21/2013] [Indexed: 05/18/2023]
Abstract
The phenomenon of RNA interference (RNAi) is involved in sequence-specific gene regulation driven by the introduction of dsRNA resulting in inhibition of translation or transcriptional repression. Since the discovery of RNAi and its regulatory potentials, it has become evident that RNAi has immense potential in opening a new vista for crop improvement. RNAi technology is precise, efficient, stable and better than antisense technology. It has been employed successfully to alter the gene expression in plants for better quality traits. The impact of RNAi to improve the crop plants has proved to be a novel approach in combating the biotic and abiotic stresses and the nutritional improvement in terms of bio-fortification and bio-elimination. It has been employed successfully to bring about modifications of several desired traits in different plants. These modifications include nutritional improvements, reduced content of food allergens and toxic compounds, enhanced defence against biotic and abiotic stresses, alteration in morphology, crafting male sterility, enhanced secondary metabolite synthesis and seedless plant varieties. However, crop plants developed by RNAi strategy may create biosafety risks. So, there is a need for risk assessment of GM crops in order to make RNAi a better tool to develop crops with biosafety measures. This article is an attempt to review the RNAi, its biochemistry, and the achievements attributed to the application of RNAi in crop improvement.
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Affiliation(s)
- Satyajit Saurabh
- Department of Biotechnology, Birla Institute of Technology, Mesra, Ranchi, 835125, India
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27
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de Oliveira MLP, de Lima Silva CC, Abe VY, Costa MGC, Cernadas RA, Benedetti CE. Increased resistance against citrus canker mediated by a citrus mitogen-activated protein kinase. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2013; 26:1190-9. [PMID: 23777433 DOI: 10.1094/mpmi-04-13-0122-r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Mitogen-activated protein kinases (MAPK) play crucial roles in plant immunity. We previously identified a citrus MAPK (CsMAPK1) as a differentially expressed protein in response to infection by Xanthomonas aurantifolii, a bacterium that causes citrus canker in Mexican lime but a hypersensitive reaction in sweet oranges. Here, we confirm that, in sweet orange, CsMAPK1 is rapidly and preferentially induced by X. aurantifolii relative to Xanthomonas citri. To investigate the role of CsMAPK1 in citrus canker resistance, we expressed CsMAPK1 in citrus plants under the control of the PR5 gene promoter, which is induced by Xanthomonas infection and wounding. Increased expression of CsMAPK1 correlated with a reduction in canker symptoms and a decrease in bacterial growth. Canker lesions in plants with higher CsMAPK1 levels were smaller and showed fewer signs of epidermal rupture. Transgenic plants also revealed higher transcript levels of defense-related genes and a significant accumulation of hydrogen peroxide in response to wounding or X. citri infection. Accordingly, nontransgenic sweet orange leaves accumulate both CsMAPK1 and hydrogen peroxide in response to X. aurantifolii but not X. citri infection. These data, thus, indicate that CsMAPK1 functions in the citrus canker defense response by inducing defense gene expression and reactive oxygen species accumulation during infection.
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28
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Chiesa MA, Siciliano MF, Ornella L, Roeschlin RA, Favaro MA, Delgado NP, Sendín LN, Orce IG, Ploper LD, Vojnov AA, Vacas JG, Filippone MP, Castagnaro AP, Marano MR. Characterization of a variant of Xanthomonas citri subsp. citri that triggers a host-specific defense response. PHYTOPATHOLOGY 2013; 103:555-564. [PMID: 23268580 DOI: 10.1094/phyto-11-12-0287-r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Citrus is an economically important fruit crop that is severely afflicted by Asiatic citrus bacterial canker (CBC), a disease caused by the phytopathogen Xanthomonas citri subsp. citri (X. citri). To gain insight into the molecular epidemiology of CBC, 42 Xanthomonas isolates were collected from a range of Citrus spp. across 17 different orchards in Tucumán, Argentina and subjected to molecular, biochemical, and pathogenicity tests. Analysis of genome-specific X. citri markers and DNA polymorphisms based on repetitive elements-based polymerase chain reaction showed that all 42 isolates belonged to X. citri. Interestingly, pathogenicity tests showed that one isolate, which shares >90% genetic similarity to the reference strain X. citri T, has host range specificity. This new variant of X. citri subsp. citri, named X. citri A(T), which is deficient in xanthan production, induces an atypical, noncankerous chlorotic phenotype in Citrus limon and C. paradisi and weak cankerous lesions in C. aurantifolia and C. clementina leaves. In C. limon, suppression of canker development is concomitant with an oxidative burst; xanthan is not implicated in the phenotype induced by this interaction, suggesting that other bacterial factors would be involved in triggering the defense response.
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Affiliation(s)
- María A Chiesa
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 590, S2002LRK Rosario, Argentina
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Mafra V, Martins PK, Francisco CS, Ribeiro-Alves M, Freitas-Astúa J, Machado MA. Candidatus Liberibacter americanus induces significant reprogramming of the transcriptome of the susceptible citrus genotype. BMC Genomics 2013; 14:247. [PMID: 23586643 PMCID: PMC3635983 DOI: 10.1186/1471-2164-14-247] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 03/26/2013] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Citrus huanglongbing (HLB) disease is caused by endogenous, phloem-restricted, Gram negative, uncultured bacteria named Candidatus Liberibacter africanus (CaLaf), Ca. L. asiaticus (CaLas), and Ca. L. americanus (CaLam), depending on the continent where the bacteria were first detected. The Asian citrus psyllid vector, Diaphorina citri, transmits CaLas and CaLam and both Liberibacter species are present in Brazil. Several studies of the transcriptional response of citrus plants manifesting HLB symptoms have been reported, but only for CaLas infection. This study evaluated the transcriptional reprogramming of a susceptible genotype of sweet orange challenged with CaLam, using a customized 385K microarray containing approximately 32,000 unigene transcripts. We analyzed global changes in gene expression of CaLam-infected leaves of sweet orange during the symptomatic stage of infection and compared the results with previously published microarray studies that used CaLas-infected plants. Twenty candidate genes were selected to validate the expression profiles in symptomatic and asymptomatic PCR-positive leaves infected with CaLas or CaLam. RESULTS The microarray analysis identified 633 differentially expressed genes during the symptomatic stage of CaLam infection. Among them, 418 (66%) were upregulated and 215 (34%) were down regulated. Five hundred and fourteen genes (81%) were orthologs of genes from Arabidopsis thaliana. Gene set enrichment analysis (GSEA) revealed that several of the transcripts encoded transporters associated with the endomembrane system, especially zinc transport. Among the most biologically relevant gene transcripts in GSEA were those related to signaling, metabolism and/or stimulus to hormones, genes responding to stress and pathogenesis, biosynthesis of secondary metabolites, oxidative stress and transcription factors belonging to different families. Real time PCR of 20 candidate genes validated the expression pattern of some genes in symptomatic and asymptomatic leaves infected with CaLam or CaLas. CONCLUSIONS Many gene transcripts and biological processes are significantly altered upon CaLam infection. Some of them had been identified in response to CaLas infection, while others had not been previously reported. These data will be useful for selecting target genes for genetic engineering to control HLB.
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Affiliation(s)
- Valéria Mafra
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico de Campinas, Cordeirópolis, São Paulo, Brazil
- Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Polyana K Martins
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico de Campinas, Cordeirópolis, São Paulo, Brazil
| | - Carolina S Francisco
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico de Campinas, Cordeirópolis, São Paulo, Brazil
| | - Marcelo Ribeiro-Alves
- Laboratório de Pesquisa em Farmacogenética / Instituto de Pesquisa Clínica Evandro Chagas (IPEC) – Fiocruz, Rio de Janeiro, Brazil
| | - Juliana Freitas-Astúa
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico de Campinas, Cordeirópolis, São Paulo, Brazil
- Embrapa Cassava & Fruits, Cruz das Almas, Bahia, Brazil
| | - Marcos A Machado
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico de Campinas, Cordeirópolis, São Paulo, Brazil
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Transcriptional profiling of canker-resistant transgenic sweet orange (Citrus sinensis Osbeck) constitutively overexpressing a spermidine synthase gene. BIOMED RESEARCH INTERNATIONAL 2012; 2013:918136. [PMID: 23509803 PMCID: PMC3591164 DOI: 10.1155/2013/918136] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 09/23/2012] [Accepted: 10/15/2012] [Indexed: 12/22/2022]
Abstract
Citrus canker disease caused by Xanthomonas citri subsp. citri (Xcc) is one of the most devastating diseases affecting the citrus industry worldwide. In our previous study, the canker-resistant transgenic sweet orange (Citrus sinensis Osbeck) plants were produced via constitutively overexpressing a spermidine synthase. To unravel the molecular mechanisms underlying Xcc resistance of the transgenic plants, in the present study global transcriptional profiling was compared between untransformed line (WT) and the transgenic line (TG9) by hybridizing with Affymetrix Citrus GeneChip. In total, 666 differentially expressed genes (DEGs) were identified, 448 upregulated, and 218 downregulated. The DEGs were classified into 33 categories after Gene ontology (GO) annotation, in which 68 genes are in response to stimulus and involved in immune system process, 12 genes are related to cell wall, and 13 genes belong to transcription factors. These genes and those related to starch and sucrose metabolism, glutathione metabolism, biosynthesis of phenylpropanoids, and plant hormones were hypothesized to play major roles in the canker resistance of TG9. Semiquantitative RT-PCR analysis showed that the transcript levels of several candidate genes in TG9 were significantly higher than in WT both before and after Xcc inoculation, indicating their potential association with canker disease.
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Marutani-Hert M, Bowman KD, McCollum GT, Mirkov TE, Evens TJ, Niedz RP. A dark incubation period is important for Agrobacterium-mediated transformation of mature internode explants of sweet orange, grapefruit, citron, and a citrange rootstock. PLoS One 2012; 7:e47426. [PMID: 23082165 PMCID: PMC3474820 DOI: 10.1371/journal.pone.0047426] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 09/17/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Citrus has an extended juvenile phase and trees can take 2-20 years to transition to the adult reproductive phase and produce fruit. For citrus variety development this substantially prolongs the time before adult traits, such as fruit yield and quality, can be evaluated. Methods to transform tissue from mature citrus trees would shorten the evaluation period via the direct production of adult phase transgenic citrus trees. METHODOLOGY/PRINCIPAL FINDINGS Factors important for promoting shoot regeneration from internode explants from adult phase citrus trees were identified and included a dark incubation period and the use of the cytokinin zeatin riboside. Transgenic trees were produced from four citrus types including sweet orange, citron, grapefruit, and a trifoliate hybrid using the identified factors and factor settings. SIGNIFICANCE The critical importance of a dark incubation period for shoot regeneration was established. These results confirm previous reports on the feasibility of transforming mature tissue from sweet orange and are the first to document the transformation of mature tissue from grapefruit, citron, and a trifoliate hybrid.
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Affiliation(s)
- Mizuri Marutani-Hert
- U.S. Horticultural Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Ft. Pierce, Florida, United States of America
| | - Kim D. Bowman
- U.S. Horticultural Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Ft. Pierce, Florida, United States of America
| | - Greg T. McCollum
- U.S. Horticultural Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Ft. Pierce, Florida, United States of America
| | - T. Erik Mirkov
- Department of Plant Pathology and Microbiology, Texas A&M University, Texas AgriLIFE Research, Weslaco, Texas, United States of America
| | - Terence J. Evens
- U.S. Horticultural Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Ft. Pierce, Florida, United States of America
| | - Randall P. Niedz
- U.S. Horticultural Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Ft. Pierce, Florida, United States of America
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Shishido H, Miyamoto Y, Ozawa R, Taniguchi S, Takabayashi J, Akimitsu K, Gomi K. Geraniol synthase whose mRNA is induced by host-selective ACT-toxin in the ACT-toxin-insensitive rough lemon (Citrus jambhiri). JOURNAL OF PLANT PHYSIOLOGY 2012; 169:1401-1407. [PMID: 22673031 DOI: 10.1016/j.jplph.2012.05.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 04/16/2012] [Accepted: 05/09/2012] [Indexed: 05/28/2023]
Abstract
Host-selective toxins (HSTs) produced by some strains of Alternaria alternata are selectively toxic to certain cultivars of plants. However, the role of HSTs in toxin-insensitive plants is currently unknown. Here, we studied the role of ACT-toxin using an ACT-toxin producing A. alternata strain SH20 and the ACT-toxin-insensitive plant rough lemon. Induction of some defense related genes in response to SH20 were faster or stronger than in response to the ACT-toxin deficient SH20 mutant. By sequencing subtractive PCR clones obtained from mRNA of rough lemon leaves inoculated with SH20 after subtraction with that of the ACT-toxin deficient SH20 mutant, we isolated the SH20-responsive genes in rough lemon. Among the SH20-responsive genes analyzed in this study, we isolated a terpene synthase (TPS) gene, RlemTPS3. We also determined that RlemTPS3 localizes to the chloroplast and produces the monoterpene geraniol.
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Fu XZ, Gong XQ, Zhang YX, Wang Y, Liu JH. Different transcriptional response to Xanthomonas citri subsp. citri between kumquat and sweet orange with contrasting canker tolerance. PLoS One 2012; 7:e41790. [PMID: 22848606 PMCID: PMC3406098 DOI: 10.1371/journal.pone.0041790] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 06/25/2012] [Indexed: 01/25/2023] Open
Abstract
Citrus canker disease caused by Xanthomonas citri subsp. citri (Xcc) is one of the most devastating biotic stresses affecting the citrus industry. Meiwa kumquat (Fortunella crassifolia) is canker-resistant, while Newhall navel orange (Citrus sinensis Osbeck) is canker-sensitive. To understand the molecular mechanisms underlying the differences in responses to Xcc, transcriptomic profiles of these two genotypes following Xcc attack were compared by using the Affymetrix citrus genome GeneChip. A total of 794 and 1324 differentially expressed genes (DEGs) were identified as canker-responsive genes in Meiwa and Newhall, respectively. Of these, 230 genes were expressed in common between both genotypes, while 564 and 1094 genes were only significantly expressed in either Meiwa or Newhall. Gene ontology (GO) annotation and Singular Enrichment Analysis (SEA) of the DEGs showed that genes related to the cell wall and polysaccharide metabolism were induced for basic defense in both Meiwa and Newhall, such as chitinase, glucanase and thaumatin-like protein. Moreover, apart from inducing basic defense, Meiwa showed specially upregulated expression of several genes involved in the response to biotic stimulus, defense response, and cation binding as comparing with Newhall. And in Newhall, abundant photosynthesis-related genes were significantly down-regulated, which may be in order to ensure the basic defense. This study revealed different molecular responses to canker disease in Meiwa and Newhall, affording insight into the response to canker and providing valuable information for the identification of potential genes for engineering canker tolerance in the future.
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Affiliation(s)
- Xing-Zheng Fu
- Key Laboratory of Horticultural Plant Biology (MOE), National Key Laboratory of Crop Genetic Improvement, College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, China
- Citrus Research Institute, Chinese Academy of Agricultural Sciences, Chongqing, China
| | - Xiao-Qing Gong
- Key Laboratory of Horticultural Plant Biology (MOE), National Key Laboratory of Crop Genetic Improvement, College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, China
| | - Yue-Xin Zhang
- Key Laboratory of Horticultural Plant Biology (MOE), National Key Laboratory of Crop Genetic Improvement, College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, China
| | - Yin Wang
- Key Laboratory of Horticultural Plant Biology (MOE), National Key Laboratory of Crop Genetic Improvement, College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, China
| | - Ji-Hong Liu
- Key Laboratory of Horticultural Plant Biology (MOE), National Key Laboratory of Crop Genetic Improvement, College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, China
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Underwood W. The plant cell wall: a dynamic barrier against pathogen invasion. FRONTIERS IN PLANT SCIENCE 2012; 3:85. [PMID: 22639669 PMCID: PMC3355688 DOI: 10.3389/fpls.2012.00085] [Citation(s) in RCA: 213] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 04/16/2012] [Indexed: 05/18/2023]
Abstract
Prospective plant pathogens must overcome the physical barrier presented by the plant cell wall. In addition to being a preformed, passive barrier limiting access of pathogens to plant cells, the cell wall is actively remodeled and reinforced specifically at discrete sites of interaction with potentially pathogenic microbes. Active reinforcement of the cell wall through the deposition of cell wall appositions, referred to as papillae, is an early response to perception of numerous categories of pathogens including fungi and bacteria. Rapid deposition of papillae is generally correlated with resistance to fungal pathogens that attempt to penetrate plant cell walls for the establishment of feeding structures. Despite the ubiquity and apparent importance of this early defense response, relatively little is known about the underlying molecular mechanisms and cellular processes involved in the targeting and assembly of papillae. This review summarizes recent advances in our understanding of cell wall-associated defenses induced by pathogen perception as well as the impact of changes in cell wall polymers on interactions with pathogens and highlights significant unanswered questions driving future research in the area.
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Affiliation(s)
- William Underwood
- Energy Biosciences Institute, University of CaliforniaBerkeley, CA, USA
- *Correspondence: William Underwood, Energy Biosciences Institute, University of California, 130 Calvin Lab, MC5230, Berkeley, CA 94720, USA. e-mail:
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