Antibiotik sebagai Induktor Buah Tanpa Biji pada Anggur
Widodo, Winarso Drajad
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Four kinds of antibiotics were examined, viz. streptomycin (SM) and gentamicin (GM) as bactericidal antibiotics and tetracycline (TC) and spectinomycin (SE) as bacteriostatical antibiotics. Kyoho and Pione (tetraploid hybrid cultivars) and Muscat of Alexandria and Neo Muscat (dip/oid vinifera cultivars) were used as the plant materials. Among the four antibiotics, SM and SE were effective to induce seedlessness in Muscat of Alexandria (MOA) and less effective for Kyoho and Pione .. The seedless induction effect of SM and SE seemed not to be affected by their mode of action. Using the four cultivars, Kyoho, Pione, MOA and Neo Muscat (NM), either SM or SE most effective to induce seedlessness when applied 3 days before full bloom. The ineffectiveness of antibiotics for Kyoho and Pione was indicated by the higher percentage of empty-seeded berries in these cultivars compared to MOA and NM Since there was no normal seed in the antibiotic-treated berries, this phenomenon indicated that the outer parts of the tetraploid ovules were more resistant to antibiotic treatments than those of diploid ovules.