厦门海区潮间带海洋动植物共附生微生物的抗菌活性

Antimicrobial activity of symbiotic and epiphyte microorganisms on marine organisms in intertidal zone of Xiamen

从厦门海区潮间带石莼、浒苔、江蓠、海兔、海葵及鲨鱼肠道分离得289株共附生微生物，以8种敏感菌为指示菌，从中获得有拮抗活性的细菌28株、放线菌17株、真菌8株。拮抗细菌以假单胞菌（39％）、弧菌（25％）和芽孢杆菌（14％）为主，主要为抗革兰氏阳性细菌（占总桔抗菌的78．6％），抗真菌的菌株比例较低（占总拮抗菌的39．3％）。拮抗放线菌分属于链霉菌（88％）和小单孢菌（12％），其抗革兰氏阳性菌、阴，比菌和真菌的菌株比例分别为65％、47％和23％。拮抗真菌分属于青霉属和芽技零属等6属，仅抑制细菌的生长。

The 289 strains of the symbiotic and epiphyte microorganisms were lsolated from marineorganisms (Ulra, Enteromorpha, Gracilaria, Actinia, Mustelus, and Aplysia)collected from theintertidal zone of Xiamen. Among them, 28 strains of bacteria, 17 strains of actinomycetesand 8 strains of fungi have shown to have antagonistic activity on bacterial or fungal growth.the main antibiotic-producing bacteria belong to Pseudomonas (39% ), Vibro (25%) andBacillus (14%). The number of bacterial strains, that inhibits the growth of G+ bacteria, isthe largest and the number of bacterial strains that inhibits the growth of fungi,is the least.The antibiotic-producing actinomycetes respectively belong to Streptomyes (88%) and Micromonospora (12%), 65% of strains inhibits the growth of G+ bacteria,47% for G- bacteriaand 23% for fungi. The antibiotic-producing fungi, belonged to 6 different genera, could only inhibit bacterial growth.