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| VÁLIO,IVANY FERRAZ MARQUES; SCARPA,FABIANO MICHELETTO. |
| Seed germination of eight tropical pioneer species (Cecropia hololeuca, C. pachystachya, C. glazioui, Solanum gracillimum, S. granuloso-leprosum, S. tabacifolium, Croton floribundus and Miconia chamissois) was studied. In controlled conditions, alternating temperatures were tested from 5 to 25 °C. Low Red:Far Red ratios (R:FR) were also examined. In the field, germination was evaluated in gaps and under the canopy. With the exception of Croton floribundus, all other species were photoblastic in that higher germination percentages were found under light conditions (S. tabacifolium behaved as a negative photoblastic species at some temperatures). No relationship was found between germination percentage and alternating temperature. Germination was markedly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pioneer species; Germination; Alternating temperatures; Gap and understory environments. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000100009 |
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| Martínez Reyes, Magdalena. |
| Los hongos ectomicorrízicos promueven el crecimiento, la transferencia nutrimental y la supervivencia en campo de diversas especies vegetales de importancia forestal. Uno de los criterios de selección de los hongos ectomicorrízicos, actualmente utilizado es su comestibilidad. En el presente trabajo se estudió el efecto de la inoculación con esporomas deshidratados molidos, solos o combinados, de Laccaria laccata s.l., Hebeloma mesophaeum s.l. y Boletus edulis s.l., en Pinus greggii Engelm. y P. montezumae Lamb., coníferas ampliamente usadas para reforestación en México. Se evaluó el efecto de estos tres hongos en el peso seco de la parte aérea, raíz, altura, diámetro del tallo y contenido nutrimental (N, P, K, Ca y Mg) de las dos especies de pino. El peso... |
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Palavras-chave: Laccaria laccata; Hebeloma mesophaeum; Boletus edulis; Especies pioneras; Hongos comestibles silvestres; Pioneer species; Edible wild mushrooms; Doctorado; Edafología. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/281 |
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| BAIDER,C.; TABARELLI,M.; MANTOVANI,W.. |
| A survey was conducted to determine the density and species composition of viable seeds buried in four stands of a tropical montane forest at Parque Estadual Intervales, Brazil. The objective was to understand: (1) how numbers and composition of the soil seed bank change as the forest regrows, and (2) how such changes affect the species available for regeneration if forests of different ages are cut down. In each forest stand (5, 18, 27-yr-old and a mature forest), 57 soil samples were collected (0-2.5 and 2.5-5 cm deep). Viable seed density of herbaceous species ranged between 11,003 seeds. m-2 (5-yr-old vegetation) and 482 (mature forest), and between 25 (5-yr-old vegetation) and 389 seeds. m-2 (mature forest) for woody plant species in the 0-5 cm soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Brazil; Forest regeneration; Pioneer species; Soil seed bank. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100006 |
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