SYNERGISTIC EFFECTS OF A CELLULASE-PRODUCING MICROMONOSPORA-CARBONACEA AND AN ANTIBIOTIC-PRODUCING STREPTOMYCES-VIOLASCENS ON THE SUPPRESSION OF PHYTOPHTHORA-CINNAMOMI ROOT-ROT OF BANKSIA-GRANDIS
Ka. Eltarabily et al., SYNERGISTIC EFFECTS OF A CELLULASE-PRODUCING MICROMONOSPORA-CARBONACEA AND AN ANTIBIOTIC-PRODUCING STREPTOMYCES-VIOLASCENS ON THE SUPPRESSION OF PHYTOPHTHORA-CINNAMOMI ROOT-ROT OF BANKSIA-GRANDIS, Canadian journal of botany, 74(4), 1996, pp. 618-624
Three polyvalent Streptomyces phages were used to isolate four Micromo
nospora species (M. carbonacea, M. chalcea, M. purpureochromogenes, an
d M. inositola) from mine-site rhizosphere soils in Western Australia,
Streptomyces violascens was isolated using selective isolation techni
ques from the same soils. The Micromonspora spp. were examined for the
ir ability to produce cellulases. Micromonospora carbonacea, M. chalce
a, and M. purpureochromogenes, which were found to produce the enzyme,
caused lysis of Phytophthora cinnamomi hyphae. Glasshouse trials show
ed that the use of the cellulase-producing M. carbonacea isolate, in c
onjunction with the antibiotic-producing S. violascens isolate, had a
synergistic effect on the suppression of the Phytophthora root rot and
in promoting growth of Banksia grandis. The importance of using a num
ber of antagonists with different antagonistic abilities to control pl
ant pathogenic fungi is discussed.