Pembentukan Populasi Mutan Azospirillum dengan Menggunakan Transposon untuk Sifat Superior terhadap Pelarutan P

Abstract
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Azospirillum sp. which has the ability for nitrogenfixation and phosphate solubilization may support modernfarming in Indonesia that is mostly dependent on the usageof chemical fertilizer N, P, and K. Genetic quality ofAzospirillum was improved in this research to obtainsuperior characters toward phosphate solubilization so thatit can become more effective in use for farmers. To achievethis goal, Azospirillum was mutated by means ofelectroporation using transposon EZ-Tn5<kan-2>Tnp. Theelectrotransformation resulted in 20 out of 22 transformantstested contained the marker gen (npt). 10, 6 and 4 mutantshave increased, decreased and lost phosphate-solubilizingfunction, respectively. Mutant with elevated phosphatesolubilizingability may be selected further to be utilized asbiofertilizer while others may be useful for identification ofgenes responsible for phosphate solubilization.
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