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ALGAE > Volume 1(1); 1986 > Article
ALGAE 1986;1(1): 281-292.
Effects of Plant Hormone on the Early Growth of Myagropsis myagroides Fensholt (Fucales, Phaeophyceae)
Jong-Hwa Lee, Hoong-Rae Kim
Department of Aquaculture, National Kunsan Fisheries College, Department of Marine Development, National Kunsan University
ABSTRACT
The effects of plant hormones for exogenous application to the early growth and development on germlings of Myagropsis myagroides, and comparisons of the effect to plant among various concentrations were described from cluture. Embryo of eggs from mature receptacle formed meristem int he apical part and rhizoidal cells bulged out from distal part. and juvenile sporeling formed the primary leaf from apical growth region. At high concentrations of the hormones, in general, the growth in both the embryo and juvenile sporeling was inhibited in the ranges of 10 super(-3)M - 10 super(-5)M, while at lower concentrations the growth was promoted by elongation of the thallus int he ranges of 10 super(-6)M - 10 super(-9)M, except for kinetin which promoted up to 10 super(-5)M. By an effective concentration of the hormones, the embryo and juvenile sporeling could be accelerated in growth at 5% level in the former and 1% level in the latter, respectively. The most effective concentration for the growth in embryo stage was 10 super(-7)M in IBA, 10 super(-7)M in NAA, 10 super(-8)M in NAA, 10 super(-6)M in kinetin, and 10 super(-6)M, in 2,4-D, whereas in juvenile sporeling stage it was 19 super(-8)M in NAA, 10 super(-6)M in IAA, 10 super(-7)M in kinetin, and 10 super(-7)M in 2,4-D, respectively.
Key words: Hormone effect, Myagropsis myagroides


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