Phenodynamics of five orchids species growing on rock outcrops in the Chapada Diamantina Mountains in northeastern Brazil

Santana, Karoline Coutinho; Souza, Isys Mascarenhas; Miranda, Lia d’Afonsêca Pedreira de; Funch, Lígia Silveira

doi:10.1590/0102-33062016abb0132

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…Epilithic Orchidaceae, Bromeliaceae and Araceae species were frequent in the top surface habitat. These families present strategies for maintaining water balance, like water-storing pseudobulbs in Orchidaceae (Santana et al 2016), tank-leaves (Males & Griffiths 2017) or foliar water uptake (Berry et al 2019) that enable them to occupy xeric environments such as bare rock (Porembski 2007).…”

Section: Floristic Patternsmentioning

confidence: 99%

Zoomingin on quartzitic outcrops: micro-habitat influences on flora and vegetation

Badia¹,

Messias²,

Echternacht³

2021

Rodriguésia

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Rock outcrop vegetation is recognized worldwide by its singular and biodiverse flora. Campo Rupestre forms hyperdiverse mosaics in rocky environments across a wide latitudinal and altitudinal gradient, with high species turnover at macro- and micro-scales. The surrounding biomes, climate, and geological formations are the main drivers of species turnover on a macro-scale while micro-habitat seems to be the main one determining the peculiarities of the Campo Rupestre on a micro-scale. In a quartzitic Campo Rupestre area we evaluate how the outcrop micro-habitats influence floristic composition and functional traits. The study area is located in the municipality of Ouro Preto, Minas Gerais state, southeastern Brazil. Two main outcrop habitats were considered: top surfaces, with bare rock, shallow depressions and ephemeral ponds; and lateral surfaces, with clefts and crevices. We recorded the vascular species, their respective life-forms (according to Raunkiaer’s system) as well as their coverage in 18 plots. We identified 71 species in 31 families. The floristic spectra and species composition were similar between top and lateral surfaces. There was no significant difference among the vegetational spectra. However, hemicryptophytes were slightly dominant on top, while on the sides chamaephytes were the dominant life-form. Understanding plant adaptations to these environments provides insights into the mechanisms underlying geomorphological heterogeneity in plant communities.

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Section: Floristic Patternsmentioning

confidence: 99%

Zoomingin on quartzitic outcrops: micro-habitat influences on flora and vegetation

Badia¹,

Messias²,

Echternacht³

2021

Rodriguésia

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“…Cyrtopodium aliciae has an inflorescence crowded by white flowers with purplish-brown spots, bracts, sepals, floral segments with wavy margins, sympodial growth, and pseudobulbs. Moreover, fruit production occurs during the rainy season and ripening occurs during the dry season (SANTANA et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

In vitro development and acclimatization of Cyrtopodium aliciae L. Linden & Rolfe, an endemic species of the Chapada Diamantina

et al. 2023

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Orchids are valued as ornamental plants, bioindicators, and medicinal plants, which implies that some species may be over-collected. Some inhabit very fragile environments and are under threat by the misuse of habitats and anthropogenic impacts. The search for beautiful plants and flowers has increased the number of facilities for micropropagation either by seeding or by cloning plants using in vitro techniques. However, not all species have appropriate media for growth and development that would help in conservation efforts. Cyrtopodium aliciae is an endemic species of rupestrian grassland in Brazil t. It has appeal as an ornamental plant or for use in hybridisation programs dueo its small size and white brownish-purple dotted flowers. This study compared three different media, namely ½ concentration Murashige and Skoog (MS), Vacin and Wendt, and Knudson C, during plant growth and their effect on the acclimatization of Cyrtopodium aliciae. The number and length of shoots and roots, increase in mass, and survival in vitro and ex vitro were analyzed. The experiment was conducted as completely random with a factorial arrangement of treatments (3 × 3) with 10 repetitions per treatment containing 10 plants for the in vitro experiment and 3 repetitions of 10 plants for the ex vitro experiment. Cyrtopodium aliciae performed better in the ½ concentration MS medium with a higher increase in mass, plant development, and survival under both in vitro and ex vitro conditions.

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Phenodynamics of five orchids species growing on rock outcrops in the Chapada Diamantina Mountains in northeastern Brazil

Cited by 2 publications

References 19 publications

Zoomingin on quartzitic outcrops: micro-habitat influences on flora and vegetation

Zoomingin on quartzitic outcrops: micro-habitat influences on flora and vegetation

In vitro development and acclimatization of Cyrtopodium aliciae L. Linden & Rolfe, an endemic species of the Chapada Diamantina

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