Navegando por Assunto "Polygalaceae"

Agora exibindo 1 - 4 de 4

Acesso aberto (Open Access)
Anatomia da glândula nodal em Moutabea chodatiana Huber e Securidaca bialata Benth. (Polygalaceae)
(Universidade Federal do Pará, 2018-12) COSTA, Christiane Silva da; DIAS, Ana Cristina Andrade de Aguiar; FLORES, Andréia Silva; SIMÕES, André Olmos
Despite the common occurrence and taxonomic value of nodal glands in Polygalaceae, little is known about the anatomy and ontogeny of these organs. Therefore, the aim of this study is to analyze the origin and structure of nodal glands in representatives of two genera of Polygalaceae: Securidaca L. and Moutabea Aubl. Samples from the fourth node were taken, fixed and processed for analysis under light and scanning electron microscopy, according to conventional techniques in plant anatomy. Our results show that, regardless their size and shape, glands from all analyzed taxa have a similar stipular origin, being connected to the leaf trace, and confirming previous studies on the foliar nature of these structures in the family.
Acesso aberto (Open Access)
Anatomia foliar de cinco espécies de Polygala de restinga e cerrado
(Universidade Federal do Pará, 2012-06) DIAS, Ana Cristina Andrade de Aguiar; YAMAMOTO, Kikyo; CASTRO, Marília de Moraes
The ecological plasticity observed in plants that inhabit different vegetation formations is often accompanied by morphological variations, the leaf being the vegetative organ with the greatest structural variation. In view of this concept, the leaf anatomy of five species of Polygala L. occurring in restinga (sandy coastal plain) and cerrado (savanna) areas in the state of São Paulo were analyzed in order to inventory their principal characters and describe their leaf structure, to thus compare them and assess the possibility of verifying structural patterns common to the ecological conditions of both vegetation formations. The species studied were: P. cyparissias A.St.-Hil. & Moq., P. laureola A.St.-Hil. & Moq., P. paniculata L. found in restinga, and P. angulata DC. and P. violacea Aubl. emend. Marques occurring in campo cerrado and cerradão margin areas, respectively. The middle region of the leaf blade and petiole proximal region of each leaf were processed following the usual techniques for scanning electron and light microscopy. The results show two structural patterns common to the species from the restinga and cerrado area formations: mesomorphic characteristics are observed in P. laureola, P. paniculata, and P. violacea, and xeromorphic in P. cyparissias and P. angulata.
Acesso aberto (Open Access)
Anatomia foliar de cinco espécies de Polygala de restinga e cerrado
(2012-06) DIAS, Ana Cristina Andrade de Aguiar; YAMAMOTO, Kikyo; CASTRO, Marília de Moraes
The ecological plasticity observed in plants that inhabit different vegetation formations is often accompanied by morphological variations, the leaf being the vegetative organ with the greatest structural variation. In view of this concept, the leaf anatomy of five species of Polygala L. occurring in restinga (sandy coastal plain) and cerrado (savanna) areas in the state of São Paulo were analyzed in order to inventory their principal characters and describe their leaf structure, to thus compare them and assess the possibility of verifying structural patterns common to the ecological conditions of both vegetation formations. The species studied were: P. cyparissias A.St.-Hil. & Moq., P. laureola A.St.-Hil. & Moq., P. paniculata L. found in restinga, and P. angulata DC. and P. violacea Aubl. emend. Marques occurring in campo cerrado and cerradão margin areas, respectively. The middle region of the leaf blade and petiole proximal region of each leaf were processed following the usual techniques for scanning electron and light microscopy. The results show two structural patterns common to the species from the restinga and cerrado area formations: mesomorphic characteristics are observed in P. laureola, P. paniculata, and P. violacea, and xeromorphic in P. cyparissias and P. angulata.
Acesso aberto (Open Access)
Flora do Ceará, Brasil: polygalaceae
(Universidade Federal do Pará, 2018-06) LIMA, Igor Gonçalves; ALBUQUERQUE, Alex Melo Lins de; DIAS, Ana Cristina Andrade de Aguiar; LOIOLA, Maria Iracema Bezerra
This study aimed carry out the floristic inventory of Polygalaceae species, as part of Flora of Ceará project. The study was based in the analysis of morphological characters of specimens obtained in field or in herborized collections from herbaria EAC, BHCB, HST, HVASF, RB and UFP. The field expeditions were realized between September/2015 and March/2016.. The identifications were based on specialized bibliography, confirmed by analysis of collections-types. In the Ceará State, 20 species and seven genera were registered: Acanthocladus (1) Asemeia (3), Bredemeyera (2), Caamembeca (1), Monnina (1), Polygala (9) and Securidaca (3). The species were registered in distincts vegetation types, but occurs, preferably, in stepic savannah (caatinga) and savannah (cerrado) and 13 (62%) were recorded in five Conservations Units. Monnina insignis and Polygala celosioides are new records for Ceará state.