Abstract

Bacterial endophytes are bacteria that reside internally within plants, flourishing in a distinct environment that protects them from external adversities and changes in environmental circumstances, unlike microbes that live outside. Their entry into plant tissues occurs through specific ‘hotspot’ areas, such as the root system. After gaining entry, the plants use a variety of secondary metabolites, structural component synthesis, plant immunity, resource competition with pathogens, phenylpropanoid metabolism and antioxidant activities to reduce the effects of both biotic and abiotic stressors. From the Gende (Gynura cripidioides; Family: Asteraceae) that was removed from the Pasighat region in the East Siang District of Arunachal Pradesh, India, endophytic bacteria were recovered. This study set out to evaluate and characterise endophytic bacteria for their ability to promote plant growth through various means, including phosphate solubilization, siderophore production, IAA production, growth on nitrogen-free media, exo-polysaccharide production, in-vitro evaluation and antagonistic activity analysis.

Pandey, P.K., Yadav, R.N.S., Samanta, R., Singh, S., Singh, A.K., Singh, A.P., 2023. Characterization and evaluation of endophytic bacteria from the ethno-medicinal plant Gynura cripidioides (Gende) of North Eastern Himalayan Region, India. Plant Health Archives, 2023, online first.