Comparative leaf morphology and anatomy of three Asteraceae species

Milan, Patrícia; Hayashi, Adriana Hissae; Appezzato‐da‐Glória, Beatriz

doi:10.1590/s1516-89132006000100016

Cited by 73 publications

(69 citation statements)

References 10 publications

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“…Leaves of D. vestitum are amphistomatic, a relatively common feature in Asteraceae species (Budel et al 2004, Milan et al 2006, Dutra et al 2010. The occurrence of stomata in both sides of leaf surface shortens the distance to CO 2 diffusion in mesophyll cells (Parkhurst et al 1988).…”

Section: Discussionmentioning

confidence: 99%

Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Silva¹,

Vilhalva²,

Moraes³

et al. 2015

An. Acad. Bras. Ciênc.

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Among the compounds stored by plants, several functions are assigned to fructans, such as source of energy and protection against drought and extreme temperatures. In the present study we analyzed the anatomy and distribution of fructans in vegetative organs of Dimerostemma vestitum (Asteraceae), an endemic species from the Brazilian campos rupestres. D. vestitum has amphistomatic and pubescent leaves, with both glandular and non-glandular trichomes. In the basal aerial stem the medulla has two types of parenchyma, which differ from the apical portion. The xylopodium has mixed anatomical origin. Interestingly, although inulin-type fructans with high degree of polymerization were found in all analyzed organs except the leaves, the highest amount and maximum degree of polymerization were detected in the xylopodium. Inulin sphero-crystals were visualized under polarized light in the medulla and in the vascular tissues mainly in the central region of the xylopodium, which has abundant xylem parenchyma. Secretory structures accumulating several compounds but not inulin were identified within all the vegetative organs. The presence of these compounds, in addition to inulin, might be related to the strategies of plants to survive adverse conditions in a semi-arid region, affected seasonally by water restriction and frequently by fire.

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Section: Discussionmentioning

confidence: 99%

Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Silva¹,

Vilhalva²,

Moraes³

et al. 2015

An. Acad. Bras. Ciênc.

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“…Occupation of different ecological niches by species of this family is a result of phenotypic plasticity, manifested generally in internal structural changes related mainly to leaf anatomy (Cronquist 1981). The leaf anatomy of Asteraceae species in Neotropical regions is poorly understood and most works are descriptive (Sajo & Menezes 1994, Melo-de-Pinna 2004, Milan et al 2006. Gochnatia polymorpha (Less.)…”

Section: Introductionmentioning

confidence: 99%

Gochnatia polymorpha (Less.) Cabrera (Asteraceae) changes in leaf structure due to differences in light and edaphic conditions

Rossatto

Kolb

2010

Acta Bot. Bras.

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RESUMO -(Gochnatia polymorpha (Less.) Cabrera modifi ca sua estrutura foliar devido a diferenças na luminosidade e condições edáfi cas). Gochnatia polymorpha (Less.) Cabrera é uma espécie de Asteraceae com ampla distribuição no bioma cerrado, sendo encontrada em diversas fi sionomias fl orestais da região sudeste do Brasil. O presente estudo descreve alguns caracteres anatômicos foliares dessa espécie e os analisa quantitativamente em função de sua ocorrência nas formações fl orestais e também das diferenças de luminosidade. Foram encontradas diferenças quantitativas em todos os parâmetros anatômicos analisados. Os resultados demonstram que a alta plasticidade anatômica foliar nesta espécie pode ser considerada como uma vantagem adaptativa que a permite ocorrer em diversos ambientes do cerrado. Palavras-chave: cerrado, freqüência estomática, mata de galeria, morfologia foliar, plasticidade anatômica ABSTRACT -(Gochnatia polymorpha (Less.) Cabrera (Asteraceae) changes in leaf structure due to differences in light and edaphic conditions). Gochnatia polymorpha (Less.) Cabrera is a widespread Asteraceae species found in different physiognomies of cerrado (Neotropical savanna) and in forest formations of southeast Brazil. This study describes some leaf anatomy characteristics of this species and quantitatively evaluates them in relation to different environments, as well as under different light conditions. We found quantitative differences in all anatomical parameters analyzed. The results demonstrate that high leaf anatomy plasticity is an adaptive advantage that allows this species to occur in diverse cerrado conditions.

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“…Leaves of G. polymorpha presented stomata only on the abaxial leaf surface, while G. barrosii possessed stomata on both surfaces. The presence of stomata on both leaf surfaces can be variable in Asteraceae (Breitwieser 1993;Milan et al 2006). The presence of amphistomatic leaves is variable also among "Cerrado" species (Morretes 1969;Elias et al 2003;Rossatto et al 2009a), despite that the general pattern reported for plants from this vegetation is hypostomatic leaves (Bieras & Sajo 2009).…”

Section: Discussionmentioning

confidence: 99%

Structural and functional leaf traits of two Gochnatia species from distinct growth forms in a sclerophyll forest site in Southeastern Brazil

Rossatto

Kolb

2012

Acta Bot. Bras.

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RESUMO(Atributos foliares estruturais e funcionais de duas espécies de Gochnatia, de formas distintas de crescimento, em uma floresta esclerófila do sudeste do Brasil). O gênero Gochnatia é comumente encontrado em diferentes fitofisionomias do Cerrado do Estado de São Paulo, crescendo desde ambientes mais abertos até áreas florestais mais fechadas. Aqui foram comparadas a anatomia foliar e alguns parâmetros ecofisiológicos de duas espécies do gênero Gochnatia, uma arbustiva (Gochnatia barrosii Cabrera) e a outra arbórea (Gochnatia polymorpha (Less.) Cabrera), ambas ocorrendo em área de cerradão na Estação Ecológica de Assis, SP. Encontraram-se diferenças estruturais qualitativas entre as espécies, com G. barrosii apresentando folhas anfiestomáticas, com epiderme unisseriada e G. polymorpha apresentando folhas hipoestomáticas, com epiderme múltipla ou hipoderme, na face adaxial. Além disso, as folhas de G. barrosii apresentaram menores valores para a espessura dos tecidos (com exceção da epiderme na face abaxial) e da folha em relação a G. polymorpha. Foram observadas diferenças na assimilação de CO 2 tanto em base de área quanto de massa seca foliar, além de diferenças na área foliar específica, sendo esta maior em G. barrosii. Apesar das folhas de G. barrosii possuírem estrutura bem menos escleromorfa do que as folhas de G. polymorpha, não foram encontradas diferenças na eficiência do uso de água. Os resultados sugerem que espécies de formas distintas de crescimento de um mesmo gênero possuem características foliares diferenciadas para lidar com as variações ambientais a que são submetidas. Palavras-chave: anatomia foliar, Cerrado, estômatos, trocas gasosas ABSTRACT(Structural and functional leaf traits of two Gochnatia species, with distinct growth forms, from a sclerophyll forest in Southeastern Brazil). Gochnatia is very common in different phytophysiognomies in the Cerrado of São Paulo State, occupying open and closed areas. In this study, we compared the leaf anatomy and some ecophysiological traits of two species of Gochnatia, one a shrub (Gochnatia barrosii Cabrera) and the other a tree (Gochnatia polymorpha (Less.) Cabrera), which both occur in an area of "cerradão" at the Estação Ecológica de Assis, SP. We found qualitative structural differences between the species, with G. barrosii presenting amphistomatic leaves with a uniseriate epidermis and G. polymorpha showing hypostomatic leaves and a multiple epidermis or hypodermis on the adaxial surface. Moreover, the G. barrosii leaves had lower values in tissue thickness (with the exception of the epidermis on the abaxial surface) and leaf thickness in relation to G. polymorpha. There were differences in CO 2 assimilation both in area and leaf dry mass basis, and differences in specific leaf area, which was higher in G. barrosii. Although the G. barrosii leaves were much less sclerophyllous than the G. polymorpha leaves, we found no differences in the efficiency of water use. The results suggest that plants from the same genus, but with distinct growth fo...

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Comparative leaf morphology and anatomy of three Asteraceae species

Abstract: ABSTRACT

Cited by 73 publications

References 10 publications

Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Gochnatia polymorpha (Less.) Cabrera (Asteraceae) changes in leaf structure due to differences in light and edaphic conditions

Structural and functional leaf traits of two Gochnatia species from distinct growth forms in a sclerophyll forest site in Southeastern Brazil

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