Phytotoxic Metabolites Produce by Fusarium oxysporum f. sp. cubense Race 2

被引:8
|
作者
Gonzalez, N. Portal [1 ,2 ]
Soler, A. [3 ]
Ribadeneira, C. [4 ]
Solano, J. [4 ]
Portieles, Roxana [5 ]
Isla, L. Herrera [6 ]
Companioni, B. [7 ]
Borras-Hidalgo, Orlando [5 ,8 ]
Bermudez, Ramon Santos [1 ,2 ]
机构
[1] Univ Jinan, Sch Biol Sci & Technol, Jinan, Peoples R China
[2] Univ Tecn Luis Vargas Torres Esmeraldas, Fac Ciencias Agr, Esmeraldas, Ecuador
[3] Ctr Cooperat Int Rech Agron Dev Reunion, St Pierre, Reunion, France
[4] Univ Estatal Bolivar, Guaranda, Guaranda, Ecuador
[5] Yota Bioengn Co Ltd, RETDA, Joint R&D Ctr Biotechnol, Rizhao, Peoples R China
[6] Univ Cent Marta Abreu Las Villas, Santa Clara, Cuba
[7] Univ Autonoma Agr Antonio Narro, Saltillo, Coahuila, Mexico
[8] Qilu Univ Technol, State Key Lab Biobased Mat & Green Papermaking, Shandong Prov Key Lab Microbial Engn, Jinan, Peoples R China
来源
FRONTIERS IN MICROBIOLOGY | 2021年 / 12卷
关键词
Fusarium wilt; panama disease; fusaric acid; phytotoxins; beauvericin; enniatin A; BANANA MUSA-ACUMINATA; GENE-CLUSTER; ACID; BEAUVERICIN; DISEASE; LEAF; WILT;
D O I
10.3389/fmicb.2021.629395
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Banana is a major tropical fruit crop but banana production worldwide is seriously threatened due to Fusarium wilt. Fusarium oxysporum f. sp. cubense (Foc), the causal agent of Fusarium wilt of banana (also referred as Panama disease) is an asexual, soil inhabiting facultative parasite. Foc isolates can be classified into three races that are not defined genetically, but for their pathogenicity to different banana cultivars. Despite mycotoxins being some of the best studied virulence factors of phytopathogenic fungi and these have been useful for the prediction of Foc virulence on banana plants, toxins produced by Foc race 2 strains have not been previously identified. The aim of this contribution was to identify the phytotoxic metabolites closely related to banana wilt caused by a Foc race 2 strain. We used an in vitro bioassay on detached banana leaves to evaluate the specificity of the microbial culture filtrates before a partial purification and further identification of Foc race 2 phytotoxins. A 29-day-old host-specific culture filtrate was obtained but specificity of culture filtrate was unrecovered after partial purification. The non-specific phytotoxins were characterized as fusaric acid, beauvericin, and enniatin A. Whereas some, if not all, of these phytotoxins are important virulence factors, a proteinaceous fraction from the specific 29-day-old culture filtrate protected the leaves of the resistant banana cultivar from damage caused by such phytotoxic metabolites.
引用
收藏
页数:8
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