Native bacterial endophytes promote host growth in a species-specific manner; phytohormone manipulations do not result in common growth responses.

ABSTRACT:

Background

All plants in nature harbor a diverse community of endophytic bacteria which can positively affect host plant growth. Changes in plant growth frequently reflect alterations in phytohormone homoeostasis by plant-growth-promoting (PGP) rhizobacteria which can decrease ethylene (ET) levels enzymatically by 1-aminocyclopropane-1-carboxylate (ACC) deaminase or produce indole acetic acid (IAA). Whether these common PGP mechanisms work similarly for different plant species has not been rigorously tested.

Methodology/principal findings

We isolated bacterial endophytes from field-grown Solanum nigrum; characterized PGP traits (ACC deaminase activity, IAA production, phosphate solubilization and seedling colonization); and determined their effects on their host, S. nigrum,

SUBMITTER: Long HH 

PROVIDER: S-EPMC2444036 | biostudies-literature | 2008 Jul

REPOSITORIES: biostudies-literature