| Texto completo | |
| Autor(es): |
Leme, Flavia Maria
[1, 2, 3]
;
Borella, Pedro Henrique
[1]
;
Marinho, Cristina Ribeiro
[1]
;
Teixeira, Simone Padua
[1]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Dept Ciencias Farmaceut, Ave Cafe S-N, BR-14040903 Ribeirao Preto, SP - Brazil
[2] Univ Estadual Campinas, Inst Biol, Programa Posgrad Biol Vegetal, R Monteiro Lobato 255, BR-13083862 Campinas, SP - Brazil
[3] Univ Fed Mato Grosso do Sul, Inst Biociencias, Lab Bot, Caixa Postal 549, BR-79070900 Campo Grande, MS - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PROTOPLASMA; v. 257, n. 4 MAR 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
Cannabaceae is a known family because of the production of cannabinoids in laticifers and glandular trichomes of Cannabis sativa. Laticifers are latex-secreting structures, which in Cannabaceae were identified only in C. sativa and Humulus lupulus. This study aimed to expand the knowledge of laticifers in Cannabaceae by checking their structural type and distribution, and the main classes of substances in the latex of Celtis pubescens, Pteroceltis tatarinowii, and Trema micrantha. Such information is also updated for C. sativa. Samples of shoot apices, stems, leaves, and flowers were processed for anatomical, histochemical, ultrastructural, and cytochemical analyses. Laticifers are articulated unbranched in all species instead of non-articulated as previously described for the family. They occur in all sampled organs. They are thick-walled, multinucleate, with a large vacuole and a peripheral cytoplasm. The cytoplasm is rich in mitochondria, endoplasmic reticulum, dictyosomes, ribosomes, and plastids containing starch grains and oil drops. Pectinase and cellulase activities were detected in the laticifer wall and vacuole, confirming its articulated origin, described by first time in the family. These enzymes promote the complete dissolution of the laticifer terminal walls. The latex contains proteins, lipids, and polysaccharides in addition to phenolics (C. sativa) and terpenes (C. pubescens, T. micrantha). The presence of laticifers with similar distribution and morphology supports the recent insertion of Celtis, Pteroceltis, and Trema in Cannabaceae. The articulated type of laticifer found in Cannabaceae, Moraceae, and Urticaceae indicates that the separation of these families by having distinct laticifer types should be reviewed. (AU) | |
| Processo FAPESP: | 14/07453-3 - Desenvolvimento floral de espécies do clado urticoide |
| Beneficiário: | Simone de Pádua Teixeira |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/03691-8 - Estruturas secretoras em espécies de rosales |
| Beneficiário: | Simone de Pádua Teixeira |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |