Data/hora: 03/06/2024 08:03:44

Provedor de dados: | 3
País: | Brazil
Título: | Post-seminal structure and development of the hemiparasitic plant Escobedia grandiflora (Orobanchaceae)
Autores: | Medina, Edison Cardona; Santos, Marisa; Nodari, Rubens Onofre.
Data: | 2019-11-06
Ano: | 2019
Palavras-chave: | Parasitism; Seed; Seedling survival; Orange roots; Haustorium.
Resumo: | Escobedia grandiflora (L.f.) Kuntze is a wild hemiparasitic plant with orange roots. Little is known about the development of initial parasitism with the host, despite the significant value of roots for Central and South American communities. Therefore, this study aimed to characterize post-seminal structure and development of E. grandiflora in Pennisetum purpureum host. To analyze the structure and development of E. grandiflora, seedlings, stems and roots samples were processed and examined under light, confocal and scanning electron microscopy. Escobedia grandiflora seeds are composed of seed coat, perisperm, and embryo. Emergence of the radicle began eleven days after imbibition. Seedlings showed a root hair collar encircling the axis at the root-hypocotyl junction with elongation of internal cortical cells. Seedlings formed haustoria and successfully reached of the host roots 22 days following root emergence. In the root many starch grains were observed, albeit more scarce in the hypocotyl. After 43 days of root emergence, the seedling stage was finished with the formation of the definitive leaves, and star of the plant stage. After 64 days, root ramification, amount of starch, and orange pigmentation increased with formation of haustoria. The developmental pattern of E. grandiflora plants was slow, but the roots grew faster than the stem. Escobedia grandiflora seeds were not endospermic and have limited nutritional value. After root emergence, the young seedling must develop roots and starch storage towards to haustorium formation and attachment to host roots.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46667

10.4025/actascibiolsci.v41i1.46667

Editor: | Universidade Estadual De Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46667/751375148952
Formato: | application/pdf

Fonte:

Acta Scientiarum. Biological Sciences; Vol 41 (2019): Publicação contínua; e46667

Acta Scientiarum. Biological Sciences; v. 41 (2019): Publicação contínua; e46667

1807-863X

1679-9283

Fonte:

Copyright (c) 2019 Acta Scientiarum. Biological Sciences

https://creativecommons.org/licenses/by/4.0