Diazotrophic bacterium Azotobacter vinelandii as a mutualistic growth promoter of an aquatic plant: Lemna minor
Diazotrophic bacterium Azotobacter vinelandii as a mutualistic growth promoter of an aquatic plant: Lemna minor
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固氮细菌 Azotobacter vinelandii 作为水生植物互利生长促进剂：青萍
DOI：
10.1007/s10725-022-00948-0
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发表时间：
2022
影响因子：
4.2
通讯作者：
Morikawa Masaaki
中科院分区：
文献类型：
--
作者：
Shuvro Sajjad Kamal;Jog Rahul;Morikawa Masaaki
浮萍科（Lemnaceae）植物是一种小型的水生陆生淡水植物，与多种微生物群落共生，棕色固氮菌（Azotobacter vinelandii）是典型的自生固氮菌，通过提供氮化合物间接造福于植物。本研究以青萍RDSC 5512和A. vinelandii ATCC 12837 = NBRC 13581在无菌条件下共培养。L.少数被A. vinelandii在含氮和无氮水条件下均被加速。其促生作用是由于该菌产生的多种植物促生因子以及在无氮条件下的生物固氮作用。此外，L. mino与A. vinelandii和A.葡萄藤属30 d后持续轻度升高。这些结果表明L. minor为A提供了有利的环境。vinelandicolonization，让他们互惠互利，通过互养繁荣。
Lemnaceae plants, commonly referred to as duckweeds, are small planktonic terrestrial freshwater plants that live in symbiosis with various microbial communities.Azotobacter vinelandiiare typical free-living nitrogen fixing soil bacteria that indirectly benefit plants by providing nitrogen compounds. In this study,Lemna minorRDSC 5512 andA. vinelandiiATCC 12837 = NBRC 13581 were co-cultured under gnotobiotic conditions. The growth ofL. minorcolonized byA. vinelandiiwas accelerated in both nitrogen-containing and nitrogen-free water conditions. The growth promotion effect is attributed to several plant growth promotion factors produced by the bacterium as well as biological nitrogen fixation in nitrogen-free condition. Moreover,L. minorelevated the nitrogen fixing activity ofA. vinelandiiand the cell number ofA. vinelandiionL. minorincreased continuously over 30 d. These observations indicated thatL. minorprovides a favorable environment forA. vinelandiicolonization, allowing them to mutually benefit and flourish through syntrophism.