Morpho-anatomy and fructans in the underground system ofApopyros warmingiiandIchthyothere terminalis(Asteraceae) from the cerrado rupestre1

Abdalla, Dayana Figueiredo; Moraes, Moemy Gomes de; Rezende, Maria Helena; Hayashi, Adriana Hissae; Carvalho, Maria Ângela Machado de

doi:10.3159/torrey-d-14-00050.1

Cited by 11 publications

(9 citation statements)

References 65 publications

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“…Inulin crystals (fructans) were detected only in the stem of A. pilosa. This carbohydrate is typical in the underground organs of Asteraceae species (Figueiredo-Ribeiro 1993;Silva et al 2015;Abdalla et al 2016;Moraes et al 2016) and has already been reported, but only in tuberous roots of Aldama (Oliveira et al 2013;Silva et al 2014;Bombo et al 2014). It is well known that fructan storage enables plants to tolerate stress conditions, such as drought (Valluru and Van den Ende 2008;Vilhalva et al 2011;Oliveira et al 2013) and low temperatures (Hendry 1987;Pontis 1989;Vijn and Smeekens 1999;Portes et al 2008), both common environmental conditions in the regions in which A. pilosa is usually found.…”

Section: Discussionmentioning

confidence: 62%

Leaf and stem anatomy and essential oil composition of four Brazilian Aldama species (Asteraceae) and their taxonomic significance

et al. 2016

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Aldama La Llave is one of several Asteraceae genera that pose phylogenetic problems. The close similarity between species, as well as the inconsistencies found in the most recent phylogenetic analysis, shows that new data are needed to help delimit group species. Aldama anchusifolia (DC) E.E.Schill. & Panero, Aldama megapotamica (Malme) Magenta & Pirani, Aldama nudibasilaris (S.F.Blake) E.E.Schill. & Panero and Aldama pilosa (Baker) E.E.Schill. & Panero are difficult to identify because they are very closely related. Therefore, the aim of this study was to detect anatomical and phytochemical characteristics to help elucidate phylogenetic issues raised by Aldama. Aerial vegetative organs were prepared using the standard histological techniques. Essential oils were obtained by hydrodistillation, and their components identified using a gas chromatograph coupled to a mass spectrometer and flame ionization detector. Each species presented a set of unique leaf and stem anatomical features. The front view of the epidermal cell walls in the leaves, the presence of secretory ducts in the phloem and medulla sclerification in the stems proved useful in delimiting these species. The essential oils were characterized by the predominance of sesquiterpenes such as t-caryophyllene, germacrene D and bicyclogermacrene. Some unique constituents in each species were also identified as potential chemical markers.

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Section: Discussionmentioning

confidence: 62%

Leaf and stem anatomy and essential oil composition of four Brazilian Aldama species (Asteraceae) and their taxonomic significance

et al. 2016

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“…No entanto, além da proteção do solo, as gemas subterrâneas em E. dysenterica são protegidas por escamas espessas o que pode ser uma proteção adicional inclusive contra agentes presentes no próprio solo. Também tem sido observada uma correlação entre a manutenção do banco de gemas e o acúmulo de carboidratos de reserva nas raízes (Appezzatoda-Glória et al, 2008) com a persistência e a regeneração dos órgãos aéreos danificados após distúrbios ambientais (Abdalla et al, 2016;Alonso & Machado, 2007). Dentre os carboidratos de reserva, o amido é o mais abundante entre as plantas vasculares (Moraes et al, 2016) e ocorre com frequência em órgãos subterrâneos de espécies do Cerrado (Alonso & Machado, 2007;Lopes-Mattos et al, 2013) inclusive nas Eugenia aqui analisadas.…”

Section: Amostra Carboidratos Totaisunclassified

“…Em Eugenia dysenterica e E. punicifolia, assim como em órgãos subterrâneos espessados de outras espécies, o acúmulo de reservas geralmente está relacionado ao incremento de células no parênquima vascular (Abdalla et al, 2016;Appezzatoda-Glória, 2015;Bell et al, 1996) punicifolia são observados cristais e grupos de esclereides lignificadas no floema secundário importantes para a proteção do eixo subterrâneo principalmente contra ataque de insetos (Hudgins et al, 2003). Na porção caulinar subterrânea de ambas as espécies e, em Eugenia pyriformis (Armstrong et al, 2012), além do floema externo verifica-se o floema interno ambos com acúmulo de compostos fenólicos nas células do parênquima radial.…”

Section: Amostra Carboidratos Totaisunclassified

“…Nas raízes das duas espécies a periderme apresenta alternância de camadas de células de paredes suberizadas e de células com espessamentos parietais em pectina. A suberização das paredes celulares confere uma barreira de proteção contra a perda de água (Franke & Schreiber, 2007), por possuir uma característica hidrofóbica (Abdalla et al, 2016) e também auxilia na proteção das estruturas contra o ataque de patógenos (Franke & Schreiber, 2007). Por outro lado, dada as propriedades hidrofílicas da pectina (Paiva et al, 2009) as paredes com espessamentos pécticos podem estar retendo umidade no tecido de revestimento.…”

Section: Amostra Carboidratos Totaisunclassified

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Estruturas relacionadas ao potencial de rebrotamento de duas espécies de Myrtaceae do Cerrado: análises morfoanatômicas e químicas

Silva¹

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“…Dentre as primeiras descrições de sistemas subterrâneos nas savanas brasileiras estão aquelas realizadas por Rizzini and Heringer (1966, 1965, 1962, 1961. Estudos com diferentes famílias vêm sendo desenvolvidos, como, por exemplo, Apocynaceae (Appezzato-da-Glória and Estelita, 2000;Lopes-Mattos et al, 2013), Asteraceae (Abdalla et al, 2016;Bombo et al, 2014;Filartiga et al, 2017;Silva et al, 2015), Amaranthaceae (Joaquim et al, 2018), Erythoxylaceae (Alonso and Machado, 2007) e Smilacaceae (Martins et al, 2010). Os estudos enfatizam que muitas espécies apresentam sistemas subterrâneos complexos, ramificados, superficiais ou não, como, por exemplo, xilopódios, presentes em cerca de 90 gêneros (Rizzini and Heringer, 1965), sóboles, raízes tuberosas, bulbos e rizomas, desempenhando papel fundamental no rebrotamento de espécies do Cerrado (Appezzato-da-Glória, 2015 e literatura citada).…”

Section: Introductionunclassified

Sistema subterrâneo e proteção das gemas aéreas de >i<Psidium grandifolium>/i< Mart. Ex Dc. ocorrentes em área de Cerrado natural e Cerrado em regeneração

Lima¹

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Belowground system and aerial bud protection of Psidium grandifolium Mart. ex Dc. occurring in the natural Cerrado and Cerrado under regenerationCerrado is the highest biodiversity savanna in the world, however, has been suffering a lot of anthropic pressure due to agricultural land use. In the decades 1960 and 1970 occurred the introduction of commercial plantations of Pinus spp. in open areas of Cerrado, causing invasion and suppression of native vegetation. At Estação Ecologica de Santa Barbara (EEsSB) techniques such as clear-cutting Pinus plantation and burning remaining material are being used to recover native vegetation. In one of these areas at EEcSB where these recovering techniques are being used, a lot of native species resprouted, such as Psidium grandifolium, which naturally occurring in other open vegetation areas at this station. The main goal of this study is to compare P.grandifolium plants growing in two different areas in the EEcSB, to test the following hypothesis, that morpho-anatomical and chemical characteristics of P.grandifolium are different in these two areas at EEcSB due to the interference of pine plantation and the plant growth conditions after its removal and burning. To test the hypothesis, it was collected three plants in an area under regeneration and three plants in a natural area. The belowground systems and aerial buds of the six plants were analyzed. In both study areas, the plants showed xylopodium whose upper part consists of a thin cauline axis followed by a tuberous root with fusiform morphology. However, in the natural area, the xylopodia were oriented vertically on the ground, while in the regenerating area, there was a curvature in the cauline axis changing the orientation of the xylopodium from vertical to horizontal. The relationship between the aerial part and the belowground system was proportionally greater in plants of the natural area. The hydraulic conductivity was higher in the regeneration area, demonstrating that the curvature did not affect the water transport in the plants. The belowground bud bank was three times greater in the area under regeneration, as the length of the cauline axis and the number of branches emitted by the xylopodium was higher. In the secondary phloem and xylem, the cells of the parenchyma rays accumulated phenolic compounds and starch grains. Chemical analysis of the root showed a significant difference in the concentrations of total carbohydrates and flavonoids between study areas. The lower concentration of total carbohydrates in the area under regeneration, reflected the costs necessary for the resprouting and recovery of the aerial part. The aerial buds were protected by colleters and leaf primordia, provided with unicellular trichomes, secretory cavities and layers of cells containing phenols. The trichome cover was visually denser in the regenerating area, where the plants are more exposed to sunlight. The main findings of the study confirmed the tested hypothesis. The mechanical impediment caused by the roots of the pine tre...

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Morpho-anatomy and fructans in the underground system ofApopyros warmingiiandIchthyothere terminalis(Asteraceae) from the cerrado rupestre¹

Cited by 11 publications

References 65 publications

Leaf and stem anatomy and essential oil composition of four Brazilian Aldama species (Asteraceae) and their taxonomic significance

Leaf and stem anatomy and essential oil composition of four Brazilian Aldama species (Asteraceae) and their taxonomic significance

Estruturas relacionadas ao potencial de rebrotamento de duas espécies de Myrtaceae do Cerrado: análises morfoanatômicas e químicas

Sistema subterrâneo e proteção das gemas aéreas de >i<Psidium grandifolium>/i< Mart. Ex Dc. ocorrentes em área de Cerrado natural e Cerrado em regeneração

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