title: β-Amino-n-butyric Acid Regulates Seedling Growth and Disease Resistance of Kimchi Cabbage.
abstract: Non-protein amino acid, β-amino-n-butyric acid (BABA), has been involved in diverse physiological processes including seedling growth, stress tolerance and disease resistance of many plant species. In the current study, treatment of kimchi cabbage seedlings with BABA significantly reduced primary root elongation and cotyledon development in a dose-dependent manner, which adverse effects were similar to the plant response to exogenous abscisic acid (ABA) application. BABA was synergistically contributing ABA-induced growth arrest during the early seedling development. Kimchi cabbage leaves were highly damaged and seedling growth was delayed by foliar spraying with high concentrations of BABA (10 to 20 mM). BABA played roles differentially in in vitro fungal conidial germination, mycelial growth and conidation of necrotroph Alternaria brassicicola causing black spot disease and hemibiotroph Colletotrichum higginsianum causing anthracnose. Pretreatment with BABA conferred induced resistance of the kimchi cabbage against challenges by the two different classes of fungal pathogens in a dose-dependent manner. These results suggest that BABA is involved in plant development, fungal development as well as induced fungal disease resistance of kimchi cabbage plant.
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 660-758, Korea.
authors.forename: Yeong Chae
authors.initials: YC
authors.lastname: Kim
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 660-758, Korea.
authors.forename: Yeon Hwa
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 660-758, Korea.
authors.forename: Young Hee
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 660-758, Korea.
authors.forename: Sang Woo
authors.initials: SW
authors.lastname: Lee
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 660-758, Korea.
authors.forename: Yun-Soek
authors.initials: YS
authors.lastname: Chae
authors.affiliation: Department of Environmental Landscape Architecture, Sangmyung University, Cheonan, Choongnam 330-720, Korea.
authors.forename: Hyun-Kyung
authors.initials: HK
authors.lastname: Kang
authors.affiliation: Division of Plant Biosciences, School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Korea.
authors.forename: Byung-Wook
authors.initials: BW
authors.lastname: Yun
authors.affiliation: Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech), Jinju 660-758, Korea.
authors.forename: Jeum Kyu
authors.initials: JK
authors.lastname: Hong
keywords: fungal development; induced disease resistance; kimchi cabbage; seedling development; β-amino-n-butyric acid