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  • Author or Editor: Leonard P. Stoltz x
  • Journal of the American Society for Horticultural Science x
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Abstract

A cattleya orchid clone (Cattleya labiata. Lindl.) grown in vitro at 7 concentrations of iron chelate prepared according to the method Steiner and van Winden at 0, 0.5, 1, 5, 10, 20, 40 ppm showed the most growth at 0 to 10 ppm and reduced growth at 20 and 40 ppm. Iron concentration of the tissue was 486 ppm at the beginning of the study and varied from 33 to 2880 ppm on dry weight basis at the end of 17 weeks. The number of propagules at the end of the study varied with tissue fresh weight.

Open Access

Abstract

Excised mature Iris embryos were grown on a nutrient medium with various agar concentrations. Fresh wt, root, and shoot length were inversely related to the agar concentration. Methods for measuring certain physical effects of agar were devised. Agar added to nutrient media is considered to reduce water availability to tissues growing on it by binding of water.

Open Access