Anatomia comparada do lenho em raiz e caule de Lippia salviifolia Cham. (Verbenaceae)

Goulart, Selma Lopes; Marcati, Carmen Regina

doi:10.1590/s0100-84042008000200009

Cited by 16 publications

(17 citation statements)

References 27 publications

(31 reference statements)

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“…A existência de camadas de crescimento no lenho de espécies de regiões temperadas e tropicais é conhecida há muito tempo, sendo mais comum em plantas de zonas temperadas como ressaltado por Wheeler et al (2007). Por sua grande importância ecofisiológica, a atividade sazonal dessas espécies tem recebido a atenção dos vários pesquisadores que investigam a anatomia do lenho no estudo da anatomia ecológica, da periodicidade de crescimento e da atividade cambial, como Iqbal & Ghouse (1987) (Goulart & Marcati 2008). Assim, a presença de camadas de crescimento nos indivíduos de E. contortisiliquum demonstra uma clara resposta da planta às condições adversas do ambiente, em especial, à baixa disponibilidade de água, como ocorre na Floresta Estacional Semidecídua e na Caatinga, durante certo período do ano.…”

Section: Resultsunclassified

Anatomia do lenho de Enterolobium contortisiliquum (Vell.) Morong (Leguminosae-Mimosoideae) ocorrente em dois ambientes

Lima¹,

Oliveira²,

Rodrigues³

2009

Rev. bras. Bot.

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-(Wood anatomy of Enterolobium contortisiliquum (Vell.) Morong (Leguminosae-Mimosoideae) occurring in two environments). This study compares and characterizes the wood from stem of Enterolobium contortisiliquum in different environments. Samples from a total of twenty individuals were collected from plants occurring in a Caatinga area in the municipalities of Campina Grande, PB (7°11' S and 35°58' W), and Buíque-PE (8°35' S and 37°14' S) and in a Tropical Semidecidual Forest in the municipalities of Taquara-RS (29°44' S and 50°50' W), and Santa Maria-RS (29°47' S and 53°34' W). The areas present different climatic conditions, where Campina Grande and Buíque present the highest temperatures and lowest rainfall compared to Taquara and Santa Maria. A qualitative analysis was made through light microscopy (LM) and scanning electron microscopy (SEM). The data were submitted to descriptive statistical analysis and analysis of variance (P ≥ 0,05). In general, regardless of the origin the individuals examined, the wood of E. contortisiliquum presented solitary and multiple vessels, intervascular pits and alternate polygonal radiovascular alterns with shapes, vestured pits, presence of vasicentric paratraqueal parenchyma, homogeneous rays, predominantly 3 to 4 cell wide. Gelatinous fibres were observed. All individuals analyzed presented growth layers. A greater quantity of crystals and starch grains was detected in cells of the axial parenchyma of plants from the lower latitudes localities. The parametric analysis of variance confirm the associations between environment and wood anatomic characteristics of E. contortisiliquum, but show differences when data are compared to reports from other species and registered in the literature.

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Section: Resultsunclassified

Anatomia do lenho de Enterolobium contortisiliquum (Vell.) Morong (Leguminosae-Mimosoideae) ocorrente em dois ambientes

Lima¹,

Oliveira²,

Rodrigues³

2009

Rev. bras. Bot.

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“…Lower vessel frequency in roots compared with the stems, and wider rays in the roots are recorded in Cerrado (Brazilian savannah) species (Machado et al 2007). Available literature indicates that roots of Lippia salviifolia have longer fibers with wider diameter (Goulart and Marcati 2008), while in Quercus robur fibers are longer and relatively thick-walled in the root but no variation was observed in the diameter of fibers of stem (Gasson 1987).…”

Section: Introductionmentioning

confidence: 99%

“…The anatomical differences between root and stem of trees growing in temperate and other tropical climates have been extensively studied and described by several authors, but Cerrado forest type is unique and no much information is available on the stem and root anatomy of species occurring in this forest type (Machado et al 2007, Palhares et al 2007, Goulart and Marcati 2008. Moreover, this area is prone to forest fires, tree species habit is relatively dwarf as compared with same species growing in other forest types and content of aluminum in soil is also higher in this forest type (Oliveira-Filho and Ratter 2002).…”

Section: Introductionmentioning

confidence: 99%

Root to branch wood anatomical variation and its influence on hydraulic conductivity in five Brazilian Cerrado species

Longui

Rajput

Melo³

et al. 2017

Bosque (Valdivia)

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“…When the anatomy of roots in general is considered, utilizing the meagre information present in the literature, the general patterns found are the following: root wood tends to be diffuse porous, to have wider vessels than those of the stems (the opposite trend seems to be true for the few lianas studied) and to show larger amounts of parenchyma and not so frequent thinwalled, commonly septate, fibres (Lebedenko, 1962;Patel, 1965;Zimmennann and Potter, 1982;Aloni and Zimmermann, 1983;Carlquist, 1996;Ewers et al, 1997;Machado et al, 1997Machado et al, , 2005Machado et al, , 2007McElrone et al, 2004;Psaras and Sofroniou, 2004;Palhares et al, 2007;Pratt et al, 2007;Goulart and Marcati, 2008;Hearn, 2009;Angélico, 2010). Here we chose Sapindaceae as a model since they are very diverse in their stem anatomy and commonly encountered in Neotropical forests.…”

Section: Introductionmentioning

confidence: 99%

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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Anatomia comparada do lenho em raiz e caule de Lippia salviifolia Cham. (Verbenaceae)

Cited by 16 publications

References 27 publications

Anatomia do lenho de Enterolobium contortisiliquum (Vell.) Morong (Leguminosae-Mimosoideae) ocorrente em dois ambientes

Anatomia do lenho de Enterolobium contortisiliquum (Vell.) Morong (Leguminosae-Mimosoideae) ocorrente em dois ambientes

Root to branch wood anatomical variation and its influence on hydraulic conductivity in five Brazilian Cerrado species

Unravelling roots of lianas: a case study in Sapindaceae

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