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ARS Home » Plains Area » College Station, Texas » Southern Plains Agricultural Research Center » Insect Control and Cotton Disease Research » Research » Publications at this Location » Publication #323417

Research Project: Detection and Biologically Based Management of Row Crop Pests Concurrent with Boll Weevil Eradication

Location: Insect Control and Cotton Disease Research

Title: Involvement of fub4, a putative serine hydrolase, in fusaric acid biosynthesis in the cotton pathogen Fusarium oxysporum f. sp. vasinfectum

Author
item Crutcher, Frankie
item Ortiz, Carlos - Texas A&M University
item Puckhaber, Lorraine
item Stipanovic, Robert - Bob
item Bell, Alois - Al
item Nichols, Robert - Cotton, Inc
item Liu, Jinggao

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 1/20/2016
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Previous work has determined that fusaric acid is required for virulence in the Australian isolate of Fusarium oxysporum f. sp. vasinfectum (Fov), which produce copious amounts of fusaric acid. Race 4 isolates, identified in the San Joaquin Valley of California, has caused serious losses and is a potential threat to US cotton production. These strains, similar to the Australian isolates, also produce fusaric acid in large quantities. To determine if fusaric acid is involved in the severe symptoms caused by this cotton pathogen, a deletion of a serine hydrolase (fub4), predicted to be involved in fusaric acid production, was constructed in a California race 4 strain. All independent gene deletions failed to produce fusaric acid. Subsequently, fusaric acid mutants were used in a disease assay with cotton, to determine if fusaric acid plays a role in Fov virulence.