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- Title
Pathogenic Factors of Plant Pathogenic Streptomyces.
- Authors
Zhang, Huaqian; Ping, Yuan; Liu, Xueqiu; He, Xin; Du, Chunmei
- Abstract
Plant pathogenic Streptomyces species (PPSs) are capable of infecting plant tissues and inducing common scab (CS) in root and tuber crops, with potato common scab (PCS) being the fourth most widespread and damaging disease affecting potato production worldwide. In recent years, with increasing market demand for potato quality, PPSs have garnered significant attention. A thorough understanding of the pathogenic factors of PPSs is a prerequisite for the prevention and control of PCS and can provide targets for the development of PCS control agents. This article primarily summarises the types and damage caused by PPSs, as well as the biosynthesis and molecular regulation of key pathogenic factors, aimed at enhancing our understanding of the molecular pathogenic mechanisms of PPSs and at providing theoretical guidance for the future development of novel PCS control agents. The pathogenicity of PPSs depends predominantly on the phytotoxins, secreted proteins, and phytohormones produced by themselves. Thaxtomins, a group of cyclic dipeptide phytotoxins, are the major pathogenic factors for inhibiting cellulose synthesis in plant tissues and promoting pathogen invasion. Coronafacoyl phytotoxins (CORs) are mainly involved in suppressing plant defence responses, whilst concanamycins (CONs) affect the severity of necrosis in plant pathological tissues. The secreted proteins Nec1 and a homologue of tomatinase TomA inhibit host defence responses, and scabin from the mART family targets guanine in potato DNA, leading to cell apoptosis. Various extracellular enzymes, including glycosyl hydrolases and esterases, are also involved in the pathogenic process of PCS. To put it succinctly, the article mainly takes the pathogenic factors of PPSs as a breakthrough point, so as to fully understand the pathogenic mechanism of PPS molecules, in order to provide a theoretical basis for the future research and control strategies of scab disease.
- Subjects
TOMA; TUBER crops; STREPTOMYCES; CELLULOSE synthase; POTATO diseases &; pests; EXTRACELLULAR enzymes; PLANT cells &; tissues; DIPEPTIDES
- Publication
Potato Research, 2024, Vol 67, Issue 2, p621
- ISSN
0014-3065
- Publication type
Article
- DOI
10.1007/s11540-023-09660-6