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| Cassanego,Mara Betânia Brizola; Goldoni,Angélica; Heldt,Fágner Henrique; Osório,Daniela Montanari Migliavacca; Windisch,Paulo Günter; Droste,Annette. |
| Regnellidium diphyllum Lindm. is a heterosporous fern growing in wetlands and humid soils that are being converted to agricultural activities. Many products that are used in agriculture contain copper, resulting in surface and groundwater contamination. Germination and initial development tests were performed using Meyer's solution containing copper sulphate at concentrations of 0 (control), 1, 5, 10, 50 and 100 mg L-1. The experiment was conducted in a growth chamber at 25 ± 1ºC for 28 days, with a 12/12-hour light/dark cycle and a photon flux density of 100 µmol m-2 s-1. The lowest germination rate (6%) was observed at 100 mg L-1. Primary root growth was significantly reduced at > 10 mg L-1. Secondary leaves of sporophytes grown in concentrations >... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fern; Heavy metals; Pollution; Reproduction; Species conservation; Wetlands. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100004 |
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| Kato, Masahiro; Yatabe, Yoko; Sahashi, Norio; Murakami, Noriaki. |
| Morphological and molecular studies are made on the fern genus Cheiropleuria, which was treated in the past as monotypic. We describe C. parva, a new species from Borneo, and separate C. integrifolia, distributed in Japan and Taiwan and probably in China too, from Southeast Asian C. bicuspis. The three species differ from each other in the size, shape and texture of lamina, divergence angles between lobes, frequency of bilobed leaves, and spore size and morphology. Cheiropleuria parva is distinct from C. bicuspis populations sympatric on Mt Kinabalu in the leaves of juvenile and adult plants, suggesting reproductive isolation. Nucleotide differences in the rbcL gene support separation of the three species. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cheiropleuria; Dipteridaceae; Fern; RbcL; Taxonomy. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/525799 |
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