Anatomia e identificação macroscópica das lianas da Reserva Florestal do Instituto de Biociências da Universidade de São Paulo, São Paulo-SP, Brasil

Figueiredo, Cairo Faleiros de

doi:10.11606/d.41.2011.tde-23012012-110851

Cited by 13 publications

(23 citation statements)

References 37 publications

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“…Banded parenchyma is the predominant type of axial parenchyma in the Cardiospermum, Paullinia and Serjania roots examined by us, just as observed by Klaassen (1999), Ara ujo and Costa (2007) and Figueiredo (2011) for the stems. In Thinouia and Urvillea, similar bands of parenchyma-like fibres occur in the roots.…”

Section: The Lianescent Habit and Root Wood Anatomysupporting

confidence: 75%

Unravelling roots of lianas: a case study in Sapindaceae

Bastos

Tamaio

Angyalossy

2016

Ann Bot

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Background and Aims Roots are key in the evolution of plants, being in charge of critical functions, such as water and nutrient uptake and anchorage of the plant body. Stems of lianescent Sapindaceae conform to the anatomical patterns typical of climbing plants, having cambial variants in their stems and vessel dimorphism in their wood. The roots of these lianas, however, are largely unexplored, so we do not know whether the plant habit has as strong an impact on their anatomy as on the anatomy of their stems. Our aim was, therefore, to thoroughly explore the anatomy of liana roots, underground organs under selective pressure completely different from that experienced by the stems.Methods We studied mature roots of 14 species belonging to five of the six genera currently recognized in the lianoid tribe Paullinieae (Sapindaceae) using traditional methods for macro-and microscopic analyses, as well as micro-computed tomography (micro-CT) techniques.Key Results Roots were shown to be strongly shaped by the lianescent habit in Paullinieae, exhibiting traits of the lianescent vascular syndrome in terms of both wood and overall anatomy. The only way to distinguish root from stem in secondary growth is by the exarch protoxylem position in the roots, as opposed to the endarch position typical of the stems. The most conspicuous trait of the lianescent vascular syndrome, which is the presence of vessel dimorphism, is evident in all roots, and we hypothesize that it helps to create an efficient, safe pathway for water conduction from this organ towards the stems. Other anatomical features present were parenchyma bands, present in the wood of almost all of the analysed species, except for Thinouia and Urvillea, where parenchyma-like fibre bands alternating with ordinary fibres are present. The majority of the roots showed no cambial variants. However, lobed roots were found in Urvillea rufescens and phloem wedges were observed in Serjania lethalis and Serjania caracasana. Neo-formed peripheral vascular strands and cylinders were common in mature roots of Serjania caracasana, and vascular connections were found uniting the peripheral and central vascular cylinders through phloem wedges, as revealed by anatomical and micro-CT analyses. The vascular connections likely represent another key mechanism to create a network that increases the area of vascular tissue and contributes as an additional conduction pathway within these thick roots.Conclusions Some traits from the lianescent vascular syndrome, such as vessel dimorphism, are present in the roots of lianescent Sapindaceae, while others, such as cambial variants common in the stems, are largely absent.

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Section: The Lianescent Habit and Root Wood Anatomysupporting

confidence: 75%

Unravelling roots of lianas: a case study in Sapindaceae

Bastos

Tamaio

Angyalossy

2016

Ann Bot

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“…11,12 Essas substâncias fotoprotetoras têm por objetivo diminuir os efeitos deletérios causados pelos raios UV por meio da absorção dos raios incidentes, ou seja, radiação com energias maiores, e transformando-as posteriormente em radiações com energias menores e não prejudiciais aos seres humanos. 13,14 A eficiência desses filtros é medida em função da sua capacidade em absorver a energia radiante. A combinação de diferentes filtros UVA e UVB, de amplo espectro de absorção em formulações, é uma alternativa para melhorar a eficiência destes e garantir uma maior proteção à pele.…”

Section: Introductionunclassified

Síntese E Avaliação Das Atividades Fotoprotetora, Citotóxica E Antiviral Contra O Zika Vírus De Derivados Triazólicos Da Benzofenona

Lima

Teixeira

Silva

et al. 2019

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SYNTHESIS AND EVALUATION OF THE PHOTOPROTECTIVE, CYTOTOXIC AND ANTIVIRAL ACTIVITY OF BENZOPHENONE DERIVATIVES CONTAINING 1,2,3-TRIAZOLIC PORTIONS. The benzophenones are synthetic and natural compounds presenting a variety of activities, including photoprotective, cytotoxic and antiviral. It is herein described the preparation of a series of twenty-seven benzophenone derivatives bearing 1,2,3-triazole functionalities and the evaluation of their photoprotective, cytotoxic and antiviral on Zika Virus (ZIKV) activities. The compounds were prepared in three steps, namely reduction of benzophenone, alkylation of diphenylmethanol and CuAAC reactions. The in vitro evaluation of the photoprotective activity revealed that the most active derivative 4-((benzhydryloxy)methyl)-1-(4-nitrobenzyl)-1H-1,2,3-triazole (4k) displayed UVB sun protection factor equal to 6,9±0,53, which make this compound a possible candidate to be used in formulations for photoprotective applications. In terms of cytotoxicity, the compounds were evaluated against MDA-MB-231 and B16F10 cell lines. It was observed that the compounds were more active against MDA-MB-231 cells and three of them were capable of reducing cell viability by approximately 55% at 100 µmol L-1. In the antiviral screening against ZIKV, compound 4-(3-benzhydryloxy)propyl)-1-(3-methylbenzyl)-1H-1,2,3triazole (5j) was the most effective in mantaining Vero cell viability.

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“…é uma reserva de mata secundária e se encontra no domínio das florestas ombrófilas densas, guardando relações com as florestas ombrófila densa atlântica e estacional semidecidual do estado de São Paulo (Groppo e Pirani, 2005). conta com aproximadamente 120 espécies de árvores e arbustos nativos (rossi 1994) e 54 espécies de lianas (Figueiredo 2011 (Lachaud, 1999;Evert, 2006 Para coloração, as lâminas passaram por um banho em acetato de butila para retirada da resina de poliestireno, foram reidratadas à álcool 50%, e então coradas em Azul de Astra e Safranina (Bukatsch, 1972). As lâminas foram novamente desidratadas, e finalmente, montados em bálsamo do Canadá.…”

Section: Materials E Métodos Local De Coletaunclassified

Sazonalidade da atividade cambial em lianas

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Anatomia e identificação macroscópica das lianas da Reserva Florestal do Instituto de Biociências da Universidade de São Paulo, São Paulo-SP, Brasil

Cited by 13 publications

References 37 publications

Unravelling roots of lianas: a case study in Sapindaceae

Unravelling roots of lianas: a case study in Sapindaceae

Síntese E Avaliação Das Atividades Fotoprotetora, Citotóxica E Antiviral Contra O Zika Vírus De Derivados Triazólicos Da Benzofenona

Sazonalidade da atividade cambial em lianas

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