Plântulas e sementes de macrófitas aquáticas de lagoas do Pantanal Sul-Mato-Grossense

Abstract

RESUMO -Plântulas e diásporos são de extrema importância na recolonização de ambientes, contribuindo para a estabilização de áreas inundadas. Inexistem dados sistematizados sobre sementes, diásporos e plântulas de espécies de macrófitas que habitam áreas sazonalmente inundáveis do Pantanal. Objetivou-se desenvolver um guia com descrições morfológicas de plântulas, diásporos e sementes, assim como da estratégia de propagação vegetativa de macrófitas, inéditas para algumas espécies. Coletaram-se plântulas, diásporos e sementes em lagoas da subregião do Abobral/Pantanal. Pranchas contendo 24 espécies (14 famílias) foram elaboradas incluindo dados morfológicos e taxonômicos. As famílias e espécies descritas foram: todas as formas de vida. Algumas espécies apresentam propagação vegetativa (estolão, fragmentação, rizomas e brotação), outras apresentaram somente frutos. Palavras-chave: atlas, bancos de sementes, diásporo, guiaABSTRACT -Seedlings and seeds of aquatic macrophytes from ponds of the Pantanal of Mato Grosso do Sul. Seeds and seedlings are important for re-colonization and stabilize flooded areas. Currently, no systematized data is available for seedlings, seeds, and other diaspores of aquatic macrophyte species from seasonally flooded areas of the Pantanal. We developed a guide describing the morphology and the propagation strategies of diaspores and seedlings, some of which are described for the first time. Plants, seedlings and seeds were collected in ponds from the Pantanal subregion called Abobral. Plates include morphological and taxonomic data of 24 species, distributed in 14 families: Alismataceae (3 spp.), Araceae (1), Polygonaceae (3), Pontederiaceae (3), Cyperaceae (1), Lentibulariaceae (2), Nymphaeaceae (3), Onagraceae (2), Cabombaceae (1), Cannaceae (1), Hydrocharitaceae (1), Marantaceae (1), Plantaginaceae (1) and Rubiaceae (1). This sampling contemplates all life forms of macrophytes. While some species presented mainly vegetative propagation, such as stolon, fragmentation and sprouting, others also developed fruits.

Factors driving seed dispersal in a Neotropical river-floodplain system

“…Plant biomass was oven dried at 60 °C up to constant weight for 72 h and weighed. Seeds were separated and counted under stereoscopic microscope (C-W 10X A/22, Nikon), and identified to the lowest taxonomic level possible following Lima et al (2018) and others (List S1 in supplementary material) and the collection of seeds available at the Instituto Nacional de Limnología (INALI-CONICET-UNL). The species nomenclature followed the standards of The International Plant Names Index (www.ipni.org).…”