数字农科院2.0

Effects of rhizobacteria on the respiration and growth of Cerasus sachalinensis Kom. seedlings

文献类型： 外文期刊

作者： Qin, Sijun;Zhou, Wenjie;Li, Zhixia;Lyu, Deguo;Li, Zhixia

作者机构：

关键词： rhizosphere microorganisms;seed germination;respiratory pathways;key respiratory enzymes;root

期刊名称： SPANISH JOURNAL OF AGRICULTURAL RESEARCH

ISSN： 1695-971X

年卷期： 2016 年 14 卷 2 期

页码：

收录情况： SCI

摘要： In this study, we investigated the influence of rhizosphere microorganisms on seed germination and root metabolism in Cerasus sachalinensis Kom. We inoculated C. sachalinensis plants with suspensions of dominant bacterial strains isolated from their rhizosphere. Four bacterial strains each with significant growth-promoting or growth-inhibiting effects were screened from the efficient root-colonizing microorganisms. The number of actinomycetes increased and that of fungi decreased significantly in the seedling rhizospheres after rhizobacteria treatment. The growth-promoting bacteria slightly affected the respiration rates and respiratory pathway enzymes, but significantly improved root viability, root carbohydrate concentration and seedling growth. Bacillus cereus, Staphylococcus sp. and Pseudomonas fluorescens were identified as the growth-promoting rhizobacteria; one strain could not be identified. After inoculation with the growth-inhibiting bacteria, the number of fungal colonies in the seedling rhizospheres increased and root viability and respiration rate as well as starch and sucrose accumulation in the roots significantly decreased. The glycolysis, pentose phosphate and alternative oxidase pathways became the major pathways of respiratory metabolism after inoculation with the growth-inhibiting bacteria. The height, leaf number, growth and dry weight of the seedlings decreased significantly in plants inoculated with the growth-inhibiting bacteria. Inoculation of C. sachalinensis rhizosphere with growth-promoting and growth-inhibiting bacteria affected the soil environmental factors such as microbial group composition, nutrient concentration and seedling biomass.

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