Secretory ducts in Anacardiaceae revisited: Updated concepts and new findings based on histochemical evidence

Autor(es)

Tolke, E. D. ^[1] ; Lacchia, A. P. S. ^[2] ; Lima, E. A. ^[3] ; Demarco, D. ^[1] ; Ascensao, L. ^[4] ; Carmello-Guerreiro, S. M. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Dept Bot, BR-05508090 Sao Paulo, SP - Brazil

^[2] Univ Estadual Paraiba, Ctr Ciencias Biol & Saude, Dept Biol, Campus 1, BR-58429600 Campina Grande, PB - Brazil

^[3] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, BR-13083970 Campinas, SP - Brazil

^[4] Univ Lisbon, Ctr Estudos Ambiente & Mar CESAM, Fac Ciencias, P-1749016 Lisbon - Portugal

• Tipo de documento: Artigo Científico
• Fonte: SOUTH AFRICAN JOURNAL OF BOTANY; v. 138, p. 394-405, MAY 2021.
• Citações Web of Science: 1

Resumo

Secretory ducts in vegetative and reproductive organs of Anacardiaceae have long been documented. However, despite the numerous studies on the anatomy and ultrastructure of these ducts, our knowledge about a possible diversity of duct metabolism in a same plant is scarce. In this study, we aimed to revisit the structure, distribution and metabolic diversity of ducts in vegetative and reproductive organs of Anacardiaceae. The distribution and anatomy of the secretory ducts in the stem, leaves, flowers and fruits of four species of Anacardiaceae were studied and their secretions histochemically characterized. Differences in the composition of the secretion according to the distribution of the ducts were detected, and more than one type of duct can occur in the same organ. In vegetative organs all the phloem ducts produce a complex, mixed resin mostly composed of lipophilic compounds (resin sensu lato). Medullary ducts of Anacardium and Spondias produce only gum, while in Tapirira they have a mixed resin. In reproductive organs, the secretion has a similar composition to the vegetative organs in each species, except in the fruits of Anacardium, where the ducts produce only lipids (resin sensu stricto). The general morphology of the ducts and the production of resins are conservative not only in Anacardiaceae, but also in other Sapindalean families. Our findings demonstrated for the first time in Anacardiaceae the presence of two kinds of ducts, which produce different classes of compounds depending on their origin and distribution. Earlier descriptions referring Anacardiaceae gum resin and/or latex ducts are in the current article denominate as resin ducts sensu lato. (c) 2021 SAAB. Published by Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 01/12178-1 - Anatomia, ultraestrutura e histoquímica das estruturas secretoras em órgãos reprodutivos de espécies de Anacardiaceae do cerrado no estado de São Paulo
• Beneficiário: Ana Paula Stechhahn Lacchia
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 96/12345-5 - Reequipamento do herbário do Departamento de Botânica - IB/UNICAMP
• Beneficiário: Eliana Regina Forni Martins
• Modalidade de apoio: Auxílio à Pesquisa - Programa Infraestrutura - Equipamentos
• Processo FAPESP: 14/18002-2 - Sapindales: filogenia e diversificação na região neotropical
• Beneficiário: José Rubens Pirani
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 03/13556-5 - Estruturas secretoras em órgãos vegetativos e reprodutivos de espécies de Anacardiaceae do Cerrado do estado de São Paulo: anatomia, histoquímica e ultra-estrutura
• Beneficiário: Ana Paula Stechhahn Lacchia
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 19/10636-6 - Morfologia e desenvolvimento floral de Biebersteiniaceae: implicações para a evolução floral e diversificação de Sapindales
• Beneficiário: Elisabeth Emília Augusta Dantas Tölke
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado