Actinomycetes are dominant in arid environments and prefer neutral to alkaline pH for their growth. Among actinomycetes most domianant genera is Streptomyces (~90%). The actinomycetes even though produce spores but are not heat resistant. These spores help in perpetuation of actinomycetes and few of the actinomycetes are known for secondary metabolite production and exopolysaccharides. Actinomycetes are known for production of siderophores, antibiotics, IAA, GA etc. They are found in the rhizosphere and few actinomycetes are endophytes tooo!!!. This traits help actinomycetes to survive in rhizopshre and hel in alleviating drought stress.

SP - TV series - ended on 2008-01-26.

Actinomycetes are a phylum of bacteria. They include soil dwelling organisms and pathogens.

Yes, there are several published reports of actinomycetes being isolated from Antarctica

Yes, they are.