Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae)
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...
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Universidade Estadual de Maringá
2019-11-01
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doaj-89b319ee828c4fc8919f4fd4c882be4d2020-11-25T03:03:55ZengUniversidade Estadual de MaringáActa Scientiarum : Biological Sciences1679-92831807-863X2019-11-0141e46667e4666710.4025/actascibiolsci.v41i1.4666746667Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae)Edison Cardona Medina0Marisa Santos1Rubens Onofre Nodari2Universidade Federal de Santa CatarinaUniversidade Federal de Santa CatarinaUniversidade Federal de Santa CatarinaEscobedia 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.http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46667parasitism; seed; seedling survival; orange roots; haustorium. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Edison Cardona Medina Marisa Santos Rubens Onofre Nodari |
spellingShingle |
Edison Cardona Medina Marisa Santos Rubens Onofre Nodari Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae) Acta Scientiarum : Biological Sciences parasitism; seed; seedling survival; orange roots; haustorium. |
author_facet |
Edison Cardona Medina Marisa Santos Rubens Onofre Nodari |
author_sort |
Edison Cardona Medina |
title |
Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae) |
title_short |
Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae) |
title_full |
Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae) |
title_fullStr |
Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae) |
title_full_unstemmed |
Post-seminal structure and development of the hemiparasitic plant <i>Escobedia grandiflora</i> (Orobanchaceae) |
title_sort |
post-seminal structure and development of the hemiparasitic plant <i>escobedia grandiflora</i> (orobanchaceae) |
publisher |
Universidade Estadual de Maringá |
series |
Acta Scientiarum : Biological Sciences |
issn |
1679-9283 1807-863X |
publishDate |
2019-11-01 |
description |
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. |
topic |
parasitism; seed; seedling survival; orange roots; haustorium. |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46667 |
work_keys_str_mv |
AT edisoncardonamedina postseminalstructureanddevelopmentofthehemiparasiticplantiescobediagrandifloraiorobanchaceae AT marisasantos postseminalstructureanddevelopmentofthehemiparasiticplantiescobediagrandifloraiorobanchaceae AT rubensonofrenodari postseminalstructureanddevelopmentofthehemiparasiticplantiescobediagrandifloraiorobanchaceae |
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1724683901391077376 |