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Harnessing Pseudomonas protegens to Control Bacterial Panicle Blight of Rice.
Phytopathology ( IF 3.2 ) Pub Date : 2020-08-27 , DOI: 10.1094/phyto-02-20-0045-r
Laura Ortega 1 , Katherine A Walker 1 , Casey Patrick 1 , Yeshi Wamishe 1, 2 , Alejandro Rojas 1 , Clemencia M Rojas 1
Affiliation  

Bacterial panicle blight of rice is a seedborne disease caused by the bacterium Burkholderia glumae. This disease has affected rice production worldwide and its effects are likely to become more devastating with the continuous increase in global temperatures, especially during the growing season. The bacterium can cause disease symptoms in different tissues and at different developmental stages. In reproductive stages, the bacterium interferes with grain development in the panicles and, as a result, directly affects rice yield. Currently, there are no methods to control the disease because chemical control is not effective and completely resistant cultivars are not available. Thus, a promising approach is the use of antagonistic microorganisms. In this work, we identified one strain of Pseudomonas protegens and one strain of B. cepacia with antimicrobial activity against B. glumae in vitro and in planta. We further characterized the antimicrobial activity of P. protegens and found that this activity is associated with bacterial secretions. Cell-free secretions from P. protegens inhibited the growth of B. glumae in vitro and also prevented B. glumae from causing disease in rice. Although the specific molecules associated with these activities have not been identified, these findings suggest that the secreted fractions from P. protegens could be harnessed as biopesticides to control bacterial panicle blight of rice.



中文翻译:

利用假单胞菌蛋白控制水稻细菌性穗枯萎病。

水稻的细菌性枯萎病是一种由灰质伯克霍尔德氏菌引起的种子传播疾病这种疾病已经影响了全世界的水稻生产,并且随着全球气温的持续升高,尤其是在生长季节,其影响可能变得更加严重。该细菌可在不同组织和不同发育阶段引起疾病症状。在生殖阶段,细菌会干扰穗中的谷粒发育,因此直接影响水稻的产量。当前,由于化学防治无效且尚无完全抗药性的品种,因此尚无控制该病的方法。因此,一种有前途的方法是使用拮抗微生物。在这项工作中,我们确定了一种假单胞菌的蛋白质和一株洋葱芽孢杆菌的抗菌活性在体外和在植物中的小芽孢杆菌我们进一步表征了体育蛋白的抗菌活性,并发现这种活性与细菌分泌有关。蛋白假单胞菌的无细胞分泌物在体外抑制了短小芽孢杆菌的生长,并且还防止了短小芽孢杆菌引起水稻疾病。尽管尚未确定与这些活性相关的特定分子,但这些发现表明,P。protegens的分泌部分 可作为杀生物剂来控制水稻的细菌性穗病。

更新日期:2020-10-02
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