GROWTH AND SPORULATION OF TRICHODERMA POLYSPORUM ON ORGANIC SUBSTRATES BY ADDITION OF CARBON AND NITROGEN SOURCES

摘要

Floral ontogeny of Jatropha multifida L. and Jatropha integerrima Jacq. (Euphorbiaceae) was studied using scanningelectron microscopy (SEM). These two species possess unisexual male flowers and bisexual (with unfunctional staminodes)female flowers. In both male and female flowers, five sepal primordia arise in a 2/5 sequence on the periphery of the floralapex and initiate anticlockwise or clockwise in different floral buds. Five petal primordia initiate simultaneously alternate tosepals. Dicyclic stamens (obdiplostemony) arise in both male and female flowers. In J. multifida, five outer stamenprimordia arise first simultaneously and then three inner stamens initiate simultaneously. However, in J. integerrima, tenstamen primordia arranged in two whorls initiate simultaneously. While the ovary is absent in the male flowers, in thefemale flowers, three carpel primordia appear simultaneously. With further development of the ovary the stamensdegenerate in the female flowers, whereas in the male flowers, the stamens grow normally. Ancestral state reconstructionusing MacClade indicates that stamen simultaneous vs. non-simultaneous initiation supports the phylogenetic analysis basedon nuclear ribosomal DNA ITS sequence.