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KMID : 0379119930210020112
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Korean Journal of Mycology
1993 Volume.21 No. 2 p.112 ~ p.119
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Screening of Microorganisms Secreting Plang Growth Regulators
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Abstract
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Various microorganisms secreting plant growth regulators were screened from the 100 microbial isolates including bacteria, actinomycetes and fungi. The isolates showing distict influence on the plant growth were identified as Aspergillus niger. The germinations of Raphanus and Cucubis seeds were completely inhibited by the culture filtrates of A. niger KK, A. niger KKS and A. uiger ATCC 9462. The culture filtrates of the three strains also inhibited the formation and development of roots and hypocotyls of Raphanus. The culture filtrates of A. niger ATCC 26550 induced the hypocotyl curvature of Raphauus like plant hormone-auxin and at the same time caused the necrosis of the whole leaves.
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