dc.contributor | Rosy Mary dos Santos Isaias | |
dc.contributor | http://lattes.cnpq.br/9821188073024074 | |
dc.contributor | Renê Goncalves da Silva Carneiro | |
dc.contributor | Lubia Maria Guedes Garcia | |
dc.contributor | Dênis Coelho de Oliveira | |
dc.contributor | Fernando Henrique Aguiar Vale | |
dc.creator | Gracielle Pereira Pimenta Bragança | |
dc.date.accessioned | 2022-10-04T00:28:19Z | |
dc.date.available | 2022-10-04T00:28:19Z | |
dc.date.issued | 2020-12-18 | |
dc.identifier | http://hdl.handle.net/1843/34967 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3834277 | |
dc.description.abstract | Galls generally result from interactions involving two organisms, the host plant and the gall
inducing organism, and may be simple, intermediate or complex in terms of structural
complexity. These levels of structural complexity are commonly related to the gall inducer
feeding habit and by the responses of plant tissue systems. We assume that the origin-fate of the
gall tissues, the vascular attributes, the cytology of the nutritive tissue, and the presence of a third
organism can strongly influence the responses of the host plant, and consequently the level of
gall structural complexity. The globoid, lenticular and fusiform galls induced by Cecidomyiidae
on Inga ingoides (Rich.) Willd. (Fabaceae: Caesalpinioideae) were used as study model to test
this hypothesis, and to verify the amplitude of the levels of structural complexity of each gall
morphotype under the same host plant morphogenetical constraints. From the perspective of gall
developmental dynamics, the water supply and maintenance of the turgor pressure necessary for
cell expansion, the cell elongation patterns, and the dynamics of cellulose fibrils-hemicelluloses
are peculiar to each gall morphotype studied here. In the fusiform intralaminar galls, the pattern
of vascular differentiation in the apex-base direction is interrupted, and greater proportion of
vascular tissues and larger diameter of the vessels in the gall and in the leaflet portions below it
develop. Contrastingly, the globoid and lenticular extralaminar galls, analogous to adventitious
organs, do not have a large investment in vascular tissues and the diameter of the vessels is
smaller when compared to the vessels in host leaflet portions above and below the gall. In
nutritional terms, the globoid ambrosia galls count on the fungus to intermediate cell death
processes, facilitating the access of the gall inducer to the nutrients accumulated in the cytoplasm
and cell wall xyloglucans. The fusiform and the lenticular galls have only two organisms and
distinct cytological profiles in their nutritive tissues. In the fusiform galls, the processes of
nutritive cell death release nutrients without fungal intermediation, whereas in the lenticular
galls, the cytological aspects indicate the maintenance of cell metabolism under the gall inducer
stimuli. We conclude that not only the feeding habits influence the structural complexity of gall
morphotypes on I. ingoides, but also the origin-fate of the tissues and the peculiar presence of a
third organism. The impact of these factors determines the structural complexity and defines
vascular compensatory mechanisms peculiar to each gall morphotype | |
dc.publisher | Universidade Federal de Minas Gerais | |
dc.publisher | Brasil | |
dc.publisher | ICB - DEPARTAMENTO DE BOTÂNICA | |
dc.publisher | Programa de Pós-Graduação em Biologia Vegetal | |
dc.publisher | UFMG | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/pt/ | |
dc.rights | Acesso Restrito | |
dc.subject | Anatomia de galhas | |
dc.subject | Histoquímica | |
dc.subject | Citologia | |
dc.subject | Galhas de ambrosia | |
dc.subject | Imunocitoquímica de parede celular | |
dc.subject | Morte celular | |
dc.subject | Sistema vascular | |
dc.title | Complexidade estrutural nos sistemas Inga ingoides - Cecidomyiidae | |
dc.type | Tese | |