Ana Claudia Macedo Vieira
Universidade Federal do Rio de Janeiro, Brazil
Title: Parasitic castration entomogenous in neotropical species: Models in Malpighiaceae of salt marshes
Biography
Biography: Ana Claudia Macedo Vieira
Abstract
Plant reproductive organs are considered very sensitive to the action of midges and depending on the level of induced change, leads to parasitic castration phenomenon causing the prevention of sexual reproduction of plants. Few models of floral galls have been described for neotropical regions, however, the salt marshes of Marica and Grumari in the state of Rio de Janeiro, were recorded and described floral galls on Byrsonima sericea DC. and Niedenzuella acutifolia (Cav.) WRAnderson (Malpighiaceae). B. sericea has been identified that there are three floral galls. induced by insects. In the gall-induced Diptera larvae developed in the pocket by inhibiting the development of ova and pollen. The gall induced Lepidoptera, the larva settles on pedicel, digging the central bud, preventing the formation of the pistil. In the third gall, the larval chamber is formed at the apex of the bud receptacle, leading to no training in their reproductive structures. In all, the cup and the corolla form ,, with varying degrees of atrophy in each type of gall. N. acutifolia occur two floral galls. The gall induced by Diptera, the gineceu hypertrophy, forming sheetlike structures where there are the larval chambers. In another gall only the cup carries and sepals are welded, forming a chamber and any other whorl is formed. In the five analyzed galls, changes in varying degrees in the differentiation of floral structures led to parasitic castration because none of the flower buds affected by midges are able to complete its development, affecting the reproductive success.