Autor(es)

Maciel-Silva, Adaises S. ^{[1, 2]} ; da Silva, Flavia C. L. ^[3] ; Valio, Ivany F. M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, BR-13083970 Campinas, SP - Brazil

^[2] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Bot, BR-31270901 Belo Horizonte, MG - Brazil

^[3] Univ Fed Rural Pernambuco UFRPE, Dept Biol, Area Ensino Ciencias Biol, BR-52171900 Recife, PE - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 86, n. 3, p. 1249-1262, SEP 2014.
• Citações Web of Science: 4

Resumo

Spores of the tropical mosses Pyrrhobryum spiniforme, Neckeropsis undulata and N. disticha were characterized regarding size, number per capsule and viability. Chemical substances were analyzed for P. spiniforme and N. undulata spores. Length of sporophyte seta (spore dispersal ability) was analyzed for P. spiniforme. Four to six colonies per species in each site (lowland and highland areas of an Atlantic Forest; Serra do Mar State Park, Brazil) were visited for the collection of capsules (2008 - 2009). Neckeropsis undulata in the highland area produced the largest spores (ca. 19 mu m) with the highest viability. The smallest spores were found in N. disticha in the lowland (ca. 13 mu m). Pyrrhobryum spiniforme produced more spores per capsule in the highland (ca. 150,000) than in lowland (ca. 40,000); longer sporophytic setae in the lowland (ca. 64 mm) than in the highland (ca. 43 mm); and similar sized spores in both areas (ca. 16 mu m). Spores of N. undulata and P. spiniforme contained lipids and proteins in the cytoplasm, and acid/neutral lipids and pectins in the wall. Lipid bodies were larger in N. undulata than in P. spiniforme. No starch was recorded for spores. Pyrrhobryum spiniforme in the highland area, different from lowland, was characterized by low reproductive effort, but presented many spores per capsule. (AU)

• Processo FAPESP: 03/12595-7 - Composicao floristica,estrutura e funcionamento da floresta ombrofila densa dos nucleos picinguaba e santa virginia do parque.
• Beneficiário: Carlos Alfredo Joly
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático