Haustório, haustor, apressório, extensor:

glossário ilustrado sobre plantas parasitas e problemática das homologias das estruturas de conexão parasita-hospedeira

Abstract

The parasitic life form in plants is associated with the formation of an organ generically called haustorium, which is responsible for the connection between parasite and host. The great diversity of parasitic species - about 1% of living angiosperms - added to the diversity of potential hosts results in a multiplicity of structures, tissues and cell types peculiar to these interactions. However, it is frequent to observe that all this morpho-anatomical variety is approached under the use of few common terms and even with synonyms, but also with ambiguous terminology use and dubious or ontogenetically unproven homology. The use of publications originally written in other languages than Portuguese (i.e. English, mainly, Spanish, French, Italian, German), often being literally translated, dealing with false cognates and other linguistics influences have also caused some confusion. In order to promote a clearer and more precise use of terminology, in addition to performing a historical retrieval of original meanings, a compilation and restructuring of terms was carried out in the way they have been approached, in order to promote a better understanding of the nomenclature used. In addition, anatomical and ontogenetic studies have been carried out and compiled from the literature, then re-analyzed under a phylogenetic perspective. Based on our results and reflections, we present an illustrated and referenced glossary, with which we suggest a standardization of more adequate terms in the description of the parasite-host interface of several families in Portuguese language.