文献类型：期刊文献

英文题名：Species-specific effects of P-solubilizing and N-2-fixing bacteria on seedling growth of three salt-tolerant trees

作者：Xiong, Yanmei[1] Zhang, Xiaojun[1] He, Xuexiang[2] Li, Mei[1] Liao, Baowen[1]

第一作者：熊燕梅

通信作者：Xiong, YM[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Guangdong Acad Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2016

卷号：47

期号：3

起止页码：259-265

外文期刊名：RUSSIAN JOURNAL OF ECOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000376764400006)】；

基金：We thank Dr. Yoav Bashan for donating bacterial strains and helpful comments on an earlier draft of this manuscript. Thanks are extended to Rongli Wang and Ye Tian for assistance in the laboratory. This study was funded by the National Science Foundation of China (no. 41176084) and the Forestry Industry Research Special Funds for Public Welfare Projects (no. 201504413).

语种：英文

外文关键词：symbiosis; afforestation; coastal forests; halophytes; mangroves; plant growth promoting bacteria (PGPB)

摘要：Coastal afforestation suffers from low survival and slow growth due to harsh conditions and lack of robust seedlings. Inoculation of P-solubilizing bacteria (PSB) or N-2-fixing bacteria (NFB) are effective in promoting plant growth and thus potentially helpful for coastal afforestation. However, it remains unclear about the generality and specificity of these plant-growth-promoting-bacteria (PGPB) on the growth of salttolerant trees. We inoculated seedlings of two mangrove trees and one terrestrial salt-tolerant tree with pure cultures of PSB or mixed cultures of PSB and NFB. Plant biomass, height, base diameter and N and P concentrations were determined six months after bacterial inoculation. We found that inoculation of PGPB had an overall promoting effect on the seedling growth of three tree species, but the effects differed greatly (3-280% increase) among plant species and bacterial isolates or bacterial combinations. Only in the terrestrial tree, co-inoculations of PSB and NFB showed greater promoting effects than monocultures of PSB. Root: shoot ratios of seedlings were not changed by bacterial inoculation. Inoculation treatments moderately elevated N concentrations in shoots and roots and P concentrations only in roots of seedlings. Our results suggest that PGPB might have a general promoting effect on the seedling growth of salt-tolerant trees. Nevertheless, the magnitude of promoting effects and the comparative advantage of dual inoculation over single inoculation are species-specific. The generality and specificity of the plant-PGPB relationship are similar to the plantmycorrhizal symbiosis. In addition, tissue nutrient improvement might not be the main mechanism of the promoting effects by PGPB.