It is expected that plants, which are endemic and unique to
specific areas, are likely to yield a high diversity of endophytes. To
date, only nitrogen-fixing root associated Enterobacter species and
a small number of endophytic fungi have been isolated from J.
curcas (Madhaiyan et al., 2013; Kumar and Kaushik, 2013).
However, information about the diversity and PGP potential of
endophytic actinobacteria associated with J. curcas and their
interactions with host is scarce. Moreover, the fact that they are
naturally occurring actinobacteria ensures that these are already
adapted to the habitat of Panxi dry-hot valley soil. Accordingly, the
aims of the present study were to isolate endophytic actinobacterial
strains from the different tissues of J. curcas L. plants from
the Panxi dry-hot valley soils of Sichuan, China and study their
genetic and functional diversity. In addition, their ACC deaminase
producing ability and other PGP activities were evaluated and the
effects of selected actinomycete strains on seedling growth were
also investigated.
It is expected that plants, which are endemic and unique tospecific areas, are likely to yield a high diversity of endophytes. Todate, only nitrogen-fixing root associated Enterobacter species anda small number of endophytic fungi have been isolated from J.curcas (Madhaiyan et al., 2013; Kumar and Kaushik, 2013).However, information about the diversity and PGP potential ofendophytic actinobacteria associated with J. curcas and theirinteractions with host is scarce. Moreover, the fact that they arenaturally occurring actinobacteria ensures that these are alreadyadapted to the habitat of Panxi dry-hot valley soil. Accordingly, theaims of the present study were to isolate endophytic actinobacterialstrains from the different tissues of J. curcas L. plants fromthe Panxi dry-hot valley soils of Sichuan, China and study theirgenetic and functional diversity. In addition, their ACC deaminaseproducing ability and other PGP activities were evaluated and theeffects of selected actinomycete strains on seedling growth werealso investigated.
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