IAA Producing Endopytic Fungus Fusariun oxysporum wlw Colonize Maize Roots and Promoted Maize Growth Under Hydroponic Condition

Indole-3-acetic acid (IAA) is known their role in plant root interactions with microbial Current study was focused on role as signal colonization endopytic fungus Fusariun oxysporum wlw roots. Culture filtrate contained 31 μg/mL of IAA. Addition tryptophan concentration ranging from 500 to 1000 μg/mL in culture medium significantly production by Fusariun oxysporum wlw. The strain effectively colonized the roots subsequently enhanced the growth proliferation host plant. In order to demined the role in root colonization by oxysporum we inhibited the biosynthesis by using IAA biosynthesis inhibitor wice efficiently reduced te colonization F. oxysporum in roots by 46% (foliar application) 62% (root application) the seedlings without yucasin (IAA biosynthesis inhibitor) treatment suggesting an crosstalk between the two partners. Exogenous application restored the ability of endophyte F. oxysporum to colonize roots and significantly improved different growth parameters maize seedlings. It is concluded that a molecular crosstalk maize roots endophytic F. oxysporum wlw is necessary for subsequent endophytic association between them.