Population dynamics of endophytic bacteria in symptom free rice plants

Abstract

Abstract: The population dynamics of endophytic bacteria in different tissues of rice plants (cultivars Shennong 319 and Zhongbai 4) was studied during their development stages. The results showed that the population of endophytic bacteria was the largest in roots, followed by in leaves and stems. And the population size was the largest at tillering stage, and gradually decreased with the senescence of tissues. Among the four isolated bacterial species, Bacillus megaterium was the dominant endophytic bacterium in the two rice cultivars. The studies on the species of endophytic bacteria and their population dynamics in tissues with the growth of rice plants could provide effective carrier bacteria to select the insect killing bacteria in genetic improvement engineering for biological control of rice insects.

Key words: Rice, Endophytic bacteria, Bacillus megaterium, Biological control

Liu Yunxia, Zhang Qingwen, Zhuo Mingzang. Population dynamics of endophytic bacteria in symptom free rice plants[J]. Chinese Journal of Applied Ecology, 1999, 10(6): 735-738.

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