Caesalpinioideae (Leguminosae) de um remanescente de Chaco em Porto Murtinho, Mato Grosso do Sul, Brasil

Alves, Fábio de Matos; Sartori, Ângela Lúcia Bagnatori

doi:10.1590/2175-7860200960305

Cited by 19 publications

(13 citation statements)

References 5 publications

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“…Both areas represent a remnant of vegetation classified as Arboreal Steppe Savannah (Veloso et al . ), which is characterised by the presence of arboreal–shrub stratum with a canopy 2–4 m in height interspersed with herbaceous strata (Alves & Sartori ).…”

Section: Methodsmentioning

confidence: 99%

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

et al. 2017

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Three synchronopatric Cactaceae species, Echinopsis rhodotricha, Harrisia balansae and Praecereus saxicola, have mostly nocturnal anthesis and similar flowers, characteristics that motivated us to perform a comparative study of reproductive ecology. Reproductive phenology was sampled monthly from December 2014 to November 2015. We describe floral biology, breeding system via pollination treatments and evaluate floral visitors from focal and filming observations. Pollen grains found on moth proboscis were compared among cactus species under light microscopy. We used fluorescent dye particles to test intra- and interspecific pollen flow. These three species have extended flowering with greater intensity in the wet season, causing high overlap. They have white and hypocrateriformis flowers that open at twilight or nightfall and last about 15 h. H. balansae seems to be self-incompatible, while E. rhodotricha presented self-compatibility. P. saxicola presented self-fertility, but most of the population seems to be self-incompatible. We suggest sphingophily for the three species, but only P. saxicola was visited by Manduca rustica (Sphingidae). However, we observed pollen grains of all three species on the proboscis of moths, especially M. rustica and M. sexta. Prolonged anthesis allowed bees (herein considered as secondary pollinators) to visit flowers of E. rhodotricha and P. saxicola. It can be concluded that the studied species share nocturnal and diurnal pollinators, suggesting interspecific pollen flow, which, however, could not be detected with fluorescent dye particles. In view of the low frequency of primary pollinators, it appears that these three species have different reproductive strategies, ensuring the fruiting and production of viable seeds.

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Section: Methodsmentioning

confidence: 99%

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

et al. 2017

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“…Among the species of native Fabaceae is Senna pendula (Willd.) HS Irwin & Barneby, a pioneer species, found mainly in the Atlantic Forest (Souza & Bortoluzzi, 2016), widely used in reforestation and landscaping due to its yellow and showy flowers (Alves & Sartori, 2009).…”

Section: Introductionmentioning

confidence: 99%

Dormancy Breaking in Senna Pendula (Willd.) H. S. Irwin & Barneby

2018

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Senna pendula seeds dormancy is caused by impermeability of the seed coat to water. In order to determine the best methodology to overcome dormancy and to perform a morphological characterization, two batches of seeds were submitted to the following treatments: a) mechanical scarification of the seed coat; b) immersion in hot water at 70 °C for 5, 10, 15 and 20 minutes; c) immersion in hot water at 90 °C for 5, 10, 15 and 20 minutes; d) sulfuric acid concentrate for 5, 10, 15 and 20 minutes; e) no treatment. The experiment was conducted in laboratory using a completely randomized design, with four replications of 25 seeds each, with daily verification for 7 days. The results showed that the use of water does not overcome the dormancy, however mechanical and chemical scarifications were the most effective treatments, with germination percentage of up to 94%.

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“…O táxon é fonte de alimento para abelhas, formigas e vespas [61]. Além disso a espécie pertence a um gênero muito importante de plantas fixadoras de nitrogênio e comumente utilizadas em projetos de recuperação de áreas degradadas [62].…”

Section: Tabela 2 Parâmetros Fitossociológicos Das Espécies Amostradunclassified

Impactos da exótica invasora Boerhavia diffusa L. sobre a diversidade de espécies do estrato herbáceo e arbustivo autóctone de uma área ripária na Caatinga, Sergipe, Brasil

Santos

Fabricante

2019

Sci. Plena

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Nosso objetivo foi estudar os impactos causados pela espécie exótica invasora Boerhavia diffusa sobre o estrato herbáceo e arbustivo em uma área ripária de Caatinga em Canindé de São Francisco, SE. Para isso, utilizamos o método de parcelas e amostramos dois ambientes nos quais todas as espécies herbáceas foram contabilizadas e estimados os parâmetros estruturais das comunidades. Amostramos 13 espécies e 513 indivíduos no ambiente invadido e 36 espécies e 1.056 indivíduos no ambiente não invadido. A diversidade de espécies baseada no índice de Shannon-Wiener (H’) foi de 1,69 para o ambiente invadido e de 2,63 para o ambiente não invadido. Nossos resultados sugerem que Boerhavia diffusa afeta de maneira negativa a diversidade de espécies do estrato herbáceo e arbustivo autóctone da área estudada.

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Caesalpinioideae (Leguminosae) de um remanescente de Chaco em Porto Murtinho, Mato Grosso do Sul, Brasil

Cited by 19 publications

References 5 publications

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

Dormancy Breaking in Senna Pendula (Willd.) H. S. Irwin & Barneby

Impactos da exótica invasora Boerhavia diffusa L. sobre a diversidade de espécies do estrato herbáceo e arbustivo autóctone de uma área ripária na Caatinga, Sergipe, Brasil

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