Effector-assisted breeding for bacterial wilt resistance in horticultural crops
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- 作者：Jay Jayaraman ; Cécile Segonzac ; Heejung Cho…
- 关键词：Additional key wordshost range ; hypersensitive response ; nucleotide ; binding leucine ; rich repeat resistance (NLR) gene ; Ralstonia ; injected proteins (Rips) ; type III secretion system ; virulence
- 刊名：Horticulture, Environment, and Biotechnology
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：57
- 期：5
- 页码：415-423
- 全文大小：362 KB
- 刊物主题：Life Sciences, general; Plant Breeding/Biotechnology; Plant Physiology; Agriculture; Plant Ecology;
- 出版者：Springer Netherlands
- ISSN：2211-3460
- 卷排序：57
文摘
Ralstonia solanacearum (Rso) is a causal agent of bacterial wilt disease in a wide range of horticultural crops. Rso strains are heterogeneous in nature and are therefore difficult in terms of both classification and development of disease resistance. Rso pathogen-associated molecular patterns (PAMPs) and effector proteins are secreted into plant cells, where they respectively activate and suppress plant immunity, thereby affecting Rso virulence. We review the current knowledge of Rso disease resistance and efforts to generate Rso-resistant crop plants. Further, we propose the introduction into plants of known pattern recognition receptors (PRRs) that recognize Rso PAMPs in order to confer resistance to a large number of strains. Additionally, the conserved ‘core’ effectors from Rso phylotypes could be used to identify and deploy nucleotide-binding leucine-rich repeat (NLR) resistance genes in a desired crop cultivar. We suggest that a phylotype-specific effector-assisted breeding program be instituted to rapidly identify disease resistance genes in available plant germplasm collections. Furthermore, stacking multiple NLRs that recognize Rso effectors would provide durable disease resistance by minimizing the chance for Rso to evade the implemented resistance. Finally, we propose that this strategy would most efficiently be achieved through development of transgenic crop lines.