Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
Mol Plant Pathol. 2011 May;12(4):329-39. doi: 10.1111/j.1364-3703.2010.00676.x. Epub 2010 Nov 24.
Burkholderia glumae causes bacterial panicle blight of rice, which is an increasingly important disease problem in global rice production. Toxoflavin and lipase are known to be major virulence factors of this pathogen, and their production is dependent on the TofI/TofR quorum-sensing system, which is mediated by N-octanoyl homoserine lactone. Flagellar biogenesis and a type III secretion system are also required for full virulence of B. glumae. Bacterial panicle blight is thought to be caused by seed-borne B. glumae; however, its disease cycle is not fully understood. In spite of its economic importance, neither effective control measures for bacterial panicle blight nor rice varieties showing complete resistance to the disease are currently available. A better understanding of the molecular mechanisms underlying B. glumae virulence and of the rice defence mechanisms against the pathogen would lead to the development of better methods of disease control for bacterial panicle blight.
Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales; Burkholderiaceae; Burkholderia.
Gram-negative, capsulated, motile, lophotrichous flagella, pectolytic.
Aborted seed, empty grains as a result of failure of grain filling, brown spots on panicles, seedling rot.
Seed sterilization, planting partially resistant lines (no completely resistant line is available). KNOWN VIRULENCE FACTORS: Toxoflavin, lipase, type III effectors.
引起稻细菌性穗枯病的伯克霍尔德氏菌是全球水稻生产中日益重要的病害问题。人们知道，毒黄素和脂酶是该病原体的主要毒力因子，它们的产生依赖于 TofI/TofR 群体感应系统，该系统由 N-辛酰高丝氨酸内酯介导。鞭毛生物发生和 III 型分泌系统也是伯克霍尔德氏菌完全毒力所必需的。细菌性穗枯病被认为是由种子携带的伯克霍尔德氏菌引起的；然而，其病害循环尚未完全了解。尽管具有经济重要性，但目前既没有有效的细菌性穗枯病防治措施，也没有对该病害表现出完全抗性的水稻品种。更好地了解伯克霍尔德氏菌毒力的分子机制以及水稻对病原体的防御机制，将导致更好地控制细菌性穗枯病的方法的发展。
细菌；变形菌门；β变形菌纲；伯克霍尔德氏菌目；伯克霍尔德氏科；伯克霍尔德氏菌属。
革兰氏阴性，荚膜，运动，周生鞭毛，果胶分解。
种子败育，由于灌浆失败导致空粒，穗部出现褐斑，幼苗腐烂。
种子消毒，种植部分抗性品系（无完全抗性品系）。已知的毒力因子：毒黄素，脂酶，III 型效应物。
