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| Medina, Edison Cardona; Santos, Marisa; Nodari, Rubens Onofre. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parasitism; Seed; Seedling survival; Orange roots; Haustorium.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46667 |
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| González-Paleo,Luciana; Pastor-Pastor,Alejandro; Bar Lamas,Marlene; Vilela,Alejandra; Ravetta,Damián. |
| Seedling recruitment is a critical stage of a plant's cycle which determines population viability, the potential for invasiveness of a plant species and the success of establishment of a crop, among other processes. We evaluated the most relevant stages leading to recruitment (seed-rain, the time of seedling emergence, and seedling survival) in four species of Physaria (P. gracilis, P. angustifolia, Physaria pinetorum and P. mendocina) in a field experiment in Patagonia, Argentina, to assess the possibility of using spontaneous recruitment to understand population dynamics and to evaluate the potential of this process as a tool for crop reestablishment. We determined the effect of water availability and initial seedling density on final stand density. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lesquerella; Arid environments; Seed-rain; Seedling survival; Seedling density; Water availability. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2016000300012 |
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