Tsavkelova E A, Lobakova E S, Kolomeĭtseva G L, Cherdyntseva T A, Netrusov A I
Department of Microbiology, Biological Faculty, Moscow State University, Vorob'evy gory, Moscow, 119899 Russia.
Mikrobiologiia. 2003 Jan-Feb;72(1):99-104.
This work is the first study of the localization of phototrophic microorganisms in the rhizoplane and velamen of epiphytic orchids, namely on the aerial and substrate roots of Acampe papillosa and Dendrobium moschatum and on the aerial roots of the Phalaenopsis amabilis and Dendrobium phalaenopsis. The composition of the bacterial community on the plant roots depended on the conditions of plant growth. Under conditions simulating climate of moist tropical forests, the aerial roots proved to be populated with phototrophic microorganisms among which cyanobacteria predominated. Interlaced fungal hyphae and filamentous cyanobacteria formed a sheath on the surface of aerial roots. The nitrogen-fixing capacity of the sheath of aerial roots was studied by the example of P. amabilis.
这项工作是对附生兰花根际和根被中光合微生物定位的首次研究，即对糙叶脆兰和麝香石斛的气生根及基质根，以及蝴蝶兰和石斛兰的气生根进行研究。植物根上细菌群落的组成取决于植物的生长条件。在模拟潮湿热带森林气候的条件下，气生根上存在光合微生物，其中蓝细菌占主导。交错的真菌菌丝和丝状蓝细菌在气生根表面形成一层鞘。以蝴蝶兰为例，研究了气生根鞘的固氮能力。
