Caracterização morfoanatômica de plântulas de &lt;em&gt;Gomphrena elegans&lt;/em&gt; Mart. (Amaranthaceae)

Mussury, Rosilda Mara; Scalon, Silvana de Paula Quintão; Gomes, Ana Amélia; Barros, Shirlayne Silvana Umbelino de

doi:10.4025/actascibiolsci.v28i2.1004

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…To evaluate metal tolerance and accumulation of G. claussenii , we used the closely related species G. elegans as comparison, which is common in many South American countries (Mussury et al, 2006) and not known to be adapted to heavy metal exposure. Although both species are taxonomically close, they are clearly separate species, with different plant morphologies.…”

Section: Discussionmentioning

confidence: 99%

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Gomphrena claussenii, the first South-American metallophyte species with indicator-like Zn and Cd accumulation and extreme metal tolerance

et al. 2013

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Plant species with the capacity to tolerate heavy metals are potentially useful for phytoremediation since they have adapted to survive and reproduce under toxic conditions and to accumulate high metal concentrations. Gomphrena claussenii Moq., a South-American species belonging to the Amaranthaceae, is found at a zinc (Zn) mining area in the state of Minas Gerais, Brazil. Through soil and hydroponic experiments, the metal tolerance and accumulation capacities of G. claussenii were assessed and the effects on physiological characteristics were compared with a closely related non-tolerant species, G. elegans Mart. G. claussenii plants grown in soil sampled at the Zn smelting area accumulated up to 5318μgg-1 of Zn and 287 μg g-1 of cadmium (Cd) in shoot dry biomass after 30 days of exposure. Plants were grown in hydroponics containing up to 3000 μM of Zn and 100 μM of Cd for G. claussenii and 100 μM of Zn and 5 μM of Cd for G. elegans. G. claussenii proved to be an extremely tolerant species to both Zn and Cd, showing only slight metal toxicity symptoms at the highest treatment levels, without significant decrease in biomass and no effects on root growth, whereas the non-tolerant species G. elegans showed significant toxicity effects at the highest exposure levels. Both species accumulated more Zn and Cd in roots than in shoots. In G. elegans, over 90% of the Cd remained in the roots, but G. claussenii showed a root:shoot concentration ratio of around 2, with shoots reaching 0.93% Zn and 0.13% Cd on dry matter base. In G. claussenii shoots, the concentrations of other minerals, such as iron (Fe) and manganese (Mn), were only affected by the highest Zn treatment while in G. elegans the Fe and Mn concentrations in shoots decreased drastically at both Zn and Cd treatments. Taking together, these results indicate that G. claussenii is a novel metallophyte, extremely tolerant of high Zn and Cd exposure and an interesting species for further phytoremediation studies.

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Section: Discussionmentioning

confidence: 99%

“…G. elegans Mart. is a related species, which is widespread in South America, but not reported to be tolerant to excess metal exposure (Mussury et al, 2006). It is used as a metal sensitive species for this study.…”

Section: Introductionmentioning

confidence: 99%

Gomphrena claussenii, the first South-American metallophyte species with indicator-like Zn and Cd accumulation and extreme metal tolerance

et al. 2013

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“…Características: é uma planta herbácea de flores de coloração roxa. Suas folhas são oval-lanceoladas, de textura pilosa e coloração verde-clara, altura: 0,1 m a 0,3 m, 0,3 m a 0,4 m (Mussury et al, 2006).…”

Section: Nome Científico: Ghomphrena Globosa Lunclassified

Os Florais Da Amazônia: Pesquisas E Desafios Na Região Para Sua Implementação

Da Silva,

De Freitas,

Costa

2023

Terceira Margem

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Os Florais são essências extraídas de ﬂ ores de árvores, de arbustos e cipós de várzea, de igapó e terra firme da Floresta Amazônica, uma forma de aproveitar o potencial energético das ﬂores potencializadas pela energia dos próprios ecossistemas amazônicos. São utilizadas no equilíbrio físico e emocional de seres humanos e animais. As ﬂores coletadas, filtradas e f xadas com solução Brandy 50% (v/v) e armazenadas em frasco âmbar. Das ﬂores coletadas, muitas ainda se encontram em processo de caracterização e de avaliação. Os ﬂorais são usados de forma individual ou em fórmulas compostas. Dentre os Florais avaliados e testados, a Nymphaeaceae (vitória amazônica), tem o poder de ativar a percepção extrassensorial, proporcionando o equilíbrio em diversas situações. O Passiﬂ ora (maracujá do mato) é excelente calmante e Hypericum auxilia fortemente no emocional ajudando na depressão e ansiedade. O conjuntode ﬂorais (cacaui, cumaru e jacarandá) reestrutura equilíbrio, refaz as energias e quando usado de formacorreta é ef caz para ansiedade, insônia e depressão entre outros.

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“…Mussury (2003), em seu trabalho de heterofilia juvenil nas Amaranthaceae, cita a morfologia e anatomia das folhas juvenis como uma importante ferramenta para o entendimento da complexidade estrutural exibida nos metafilos, além de auxiliar estudos taxonômicos e ecológicos. Mussury (2006) também enfatiza sobre a carência e importância das informações de morfologia das plântulas e morfoanatomia de cotilédones e eofilos, já que normalmente, os estudos enfocam somente a anatomia dos metafilos. Segundo Parra (1984) e Souza & Oliveira (2004), características morfológicas de sementes e plântulas são importantes para seu reconhecimento na mata.…”

Section: Introductionunclassified

Morfoanatomia da plântula e tirodendro de Rollinia sylvatica (A. St.-Hil.) Mart. (Annonaceae)

Mayer¹,

Alves²,

Souza³

et al. 2008

Rev. bras. Bot.

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-(Rollinia sylvatica (A. St.-Hil.) Mart. (Annonaceae) seedling and tirodendro morphology and anatomy) Morphology and anatomy studies about seedling are important to identify species and to comprehend Angiosperm life cycle. However, there are few researches about it. The aim of this study is to analyze the morphological and anatomical aspects of the structure of Rollinia sylvatica (A. St.-Hil.) Mart seedlings, which is a native species from South of Brazil. The seedlings were obtained from seeds collected in Antonina, state of Paraná. The germination was carried out in a green house condition. Seedlings and tirodendros were collected 2, 4, 8, 18, 40 e 55 days after germination and were fixed in FPA 50. These plants are phanerocotylars and epigeous with tap and diarch root. The hypocotyl has transition structure between root and stem, being separated and spreading cells from primary xylem, arranged around of parenchyma pith. Phloem keeps undivided. At the beginning of epicotyls two vascular bundles are formed. The 55 day old seedlings secondary growth is notorious in the root basal region, hypocotyl and epicotyl. Cotyledons, eophylls and metaphylls present uniseriate epidermis on both faces. Cotyledons are amphihypostomatic and eophylls and metaphylls are hypostomatic, all of them have dorsiventral mesophyll. The cotyledon midrib is not prominent with a bundle. The midrib is prominent and it has five collaterals bundle in the eophyll and seven in the metaphyll. The three leaves have different petiole formats, subepidermic collenchyma, two collateral vascular bundles ones in the cotyledon and ten in the eophyll and metaphyll.Keywords -anatomy, araticum, morphology, seedling RESUMO -(Morfoanatomia da plântula e tirodendro de Rollinia sylvatica (A. St.-Hil.) Mart. (Annonaceae)). O estudo morfoanatômico de plântulas é importante para a identificação das espécies e para a compreensão do ciclo de vida das Angiospermae. Entretanto, trabalhos sobre o tema são raros. O objetivo dessa investigação é analisar a estrutura morfoanatômica de plântulas e tirodendros de Rollinia sylvatica (A. St.-Hil.) Mart, espécie nativa da região sul do Brasil. As sementes foram coletadas no Município de Antonina-PR e germinadas em casa de vegetação. As plântulas e tirodendros foram coletados com 2, 4, 8, 18, 40 e 55 dias após a germinação e fixados em FPA 50. As plântulas são fanerocotiledonares e epígeas. A raiz é pivotante e diarca. O hipocótilo tem estrutura de transição entre raiz e caule, com separação e afastamento das células do xilema primário, que passam a se dispor ao redor da medula parenquimática; o floema permanece indiviso. No início do epicótilo formam-se dois feixes vasculares tipicamente caulinares. No tirodendro de 55 dias o crescimento secundário é evidente na região basal da raiz, hipocótilo e epicótilo. Os cotilédones, eofilos e metafilos apresentam epiderme unisseriada em ambas as faces. Os cotilédones são anfi-hipoestomáticos e os eofilos e metafilos são hipoestomáticos, todos com mesofilo dorsiventral. A nervu...

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Caracterização morfoanatômica de plântulas de <em>Gomphrena elegans</em> Mart. (Amaranthaceae)

Cited by 5 publications

References 7 publications

Gomphrena claussenii, the first South-American metallophyte species with indicator-like Zn and Cd accumulation and extreme metal tolerance

Gomphrena claussenii, the first South-American metallophyte species with indicator-like Zn and Cd accumulation and extreme metal tolerance

Os Florais Da Amazônia: Pesquisas E Desafios Na Região Para Sua Implementação

Morfoanatomia da plântula e tirodendro de Rollinia sylvatica (A. St.-Hil.) Mart. (Annonaceae)

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