Identification of Burkholderia and Penicillium isolates from kauri (Agathis australis) soils that inhibit the mycelial growth of Phytophthora agathidicida

Phytophthora agathidicida is a highly virulent pathogen of kauri (Agathis australis) and the causal agent dieback disease in New Zealand’s forests. This study aimed to identify microbial isolates isolated from forest soils that inhibited growth P. agathidicida. Three different forms vitro bioassays were used assess inhibition each isolate on mycelial Furthermore, head space (HS) solid-phase micro-extraction coupled with gas chromatography-mass spectrometry (SPME-GCMS) was performed if emitted volatile organic compounds (VOCs), which may be contributing inhibition. research identified several bacterial belonging genus Burkholderia VOCs produced by these putatively identified, responsible for observed bioassays. Several Penicillium inhibit agathidicida, culture filtrate one being found strongly growth. These appear exhibit multiple modes antagonism against including competition production diffusible anti-microbial compounds. Although further needed better define their mechanisms inhibition, findings have candidate antagonists