Journal of Food, Agriculture and Environment

Organic acid inhibiting germination and growth of tobacco seed and soil microbial community

Author(s):

Mao Sheng Wang ^{1, 2}, Han Cheng Wang ², Yong Wang ¹, Yan Xia Liu ², Jun Xiong Shi ², Xuan Li Jiang ¹*, Ji Chuan Kang ³*

Recieved Date: 2014-01-30, Accepted Date: 2014-04-02

Abstract:

The effect of four organic acids (benzoic, p-hydroxybenzoic, salicylic and malic acids) on germination and the whole process of tobacco seeding were investigated. Results showed that p-hydroxybenzoic and malic acids did not affect the germination rate, while the germination rate decreased with the concentration increase of benzoic and salicylic acids. Tobacco seedlings were grown in Hoagland nutrient solution with benzoic, p-hydroxybenzoic, salicylic and malic acids at concentrations of 0, 100, 200, 400, 600, 800 and 1000 µM, respectively. The dry and fresh weights of the whole plant showed increase firstly and decreased afterward with the concentration increase of benzoic, p-hydroxybenzoic and salicylic acids. The malic acid did not affect the dry and fresh weights of the plant. The number of soil actinomycetes was decreased with the concentration increase of benzoic and p-hydroxybenzoic acids, and increased firstly and decreased afterward with the concentration increase of salicylic and malic acids. The number of soil fungi was decreased with the concentration increase of benzoic, p-hydroxybenzoic, salicylic and malic acids. The number of soil bacteria in different treatments of salicylic and malic acids, and benzoic and p-hydroxybenzoic acids first increased and then decreased.

Keywords:

Tobacco, allelopathy, root exudates, organic acids, microbes

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 2
Category: Agriculture
Pages: 344-348

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