title: Differential Control Efficacies of Vitamin Treatments against Bacterial Wilt and Grey Mould Diseases in Tomato Plants.
abstract: Bacterial wilt and grey mould in tomato plants are economically destructive bacterial and fungal diseases caused byRalstonia solanacearumandBotrytis cinerea, respectively. Various approaches including chemical and biological controls have been attempted to arrest the tomato diseases so far. In this study,in vitrogrowths of bacterialR. solanacearumand fungalB. cinereawere evaluated using four different vitamins including thiamine (vitamin B1), niacin (vitamin B3), pyridoxine (vitamin B6), and menadione (vitamin K3).In plantaefficacies of the four vitamin treatments on tomato protection against both diseases were also demonstrated. All four vitamins showed differentin vitroantibacterial activities againstR. solanacearumin dose-dependent manners. However, treatment with 2 mM thiamine was only effective in reducing bacterial wilt of detached tomato leaves without phytotoxicity under lower disease pressure (106colony-forming unit [cfu]/ml). Treatment with the vitamins also differentially reducedin vitroconidial germination and mycelial growth ofB. cinerea. The four vitamins slightly reduced the conidial germination, and thiamine, pyridoxine and menadione inhibited the mycelial growth ofB. cinerea. Menadione began to drastically suppress the conidial germination and mycelial growth by 5 and 0.5 mM, respectively. Grey mould symptoms on the inoculated tomato leaves were significantly reduced by pyridoxine and menadione pretreatments one day prior to the fungal challenge inoculation. These findings suggest that disease-specific vitamin treatment will be integrated for eco-friendly management of tomato bacterial wilt and grey mould.
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 52725, Korea.
authors.forename: Jeum Kyu
authors.initials: JK
authors.lastname: Hong
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 52725, Korea.
authors.forename: Hyeon Ji
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 52725, Korea.
authors.forename: Heesoo
authors.initials: H
authors.lastname: Jung
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 52725, Korea.
authors.forename: Hye Ji
authors.initials: HJ
authors.lastname: Yang
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 52725, Korea.
authors.forename: Do Hoon
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Turfgrass Science Institute, Hanul Inc., Hapcheon 50229, Korea.
authors.forename: Chang Hyun
authors.initials: CH
authors.lastname: Sung
authors.affiliation: Department of Bioresources Engineering and PERI, Sejong University, Seoul 05006, Korea.
authors.forename: Chang-Jin
authors.initials: CJ
authors.lastname: Park
authors.affiliation: Department of Golf Course Management, Korea Golf University, Gangwon 25247, Korea.
authors.forename: Seog Won
authors.initials: SW
authors.lastname: Chang
keywords: bacterial wilt; grey mould; menadione; thiamine; tomato