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	Provedor de dados Acta Botanica (1) Anais da ABC (AABC) (1) Planta Daninha (1) Rev. Bras. Bot. (1) Autor ASGARPOUR,R. (1) Aud,Fabiana F. (1) Botelho,Soraya A. (1) Dias,Denise C.F.S. (1) Ferraz,Isolde D.K. (1) GHADERI-FAR,F. (1) GORGANI,M. (1) Moraes,Paulo José de (1) Paula,Cláudio C. de (1) SCARPA,FABIANO MICHELETTO (1) SIAHMARGUEE,A. (1) Saraiva,Diogo F. (1) Silva,Mariana M. (1) Vinícius-Silva,Ronaldo (1) VÁLIO,IVANY FERRAZ MARQUES (1) Mais... Palavra-chave Alternating temperatures (4) Biotic stress (1) Exotic species (1) Gap and understory environments (1) Germinability (1) Germination (1) Hairy sheath lovegrass (1) KNO₃ (1) Mean germination time (1) Mining areas (1) Native species (1) PH (1) Photoblastic germination (1) Pioneer species (1) Secondary forests (1) Tropical trees (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2020 (2) 2012 (1) 2001 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Germination Ecology of Ivy-Leaved Morning-Glory: an Invasive Weed in Soybean Fields, Iran Planta Daninha SIAHMARGUEE,A.; GORGANI,M.; GHADERI-FAR,F.; ASGARPOUR,R.. ABSTRACT: Ivy-leaved morning-glory (Ipomoea hederacea Jacq.) is an exotic species that is becoming an increasing problem in soybean fields of Golestan province, Iran. Because little information is available on the biology of this weed species in Iran, experiments were conducted to investigate the effects of different factors on seed germination and emergence of Ivy-leaved morning-glory. Maximum germination occurred at constant temperature of 20 oC (82%) and alternating temperature of 15/25 oC (94%). Germination was reduced with increasing salinity and drought stresses. Sodium chloride concentration and osmotic potential that inhibited 50% maximum germination were -1.64 and -1.03 MPa, respectively. Acidity was a limiting factor for the germination, due to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biotic stress; Alternating temperatures; Exotic species; PH. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100227 Germination of seeds of tropical pioneer species under controlled and natural conditions Rev. Bras. Bot. 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 Seed germination and dormancy break in Eragrostis polytricha, a native Brazilian grass species with potential for recovery of degraded lands Acta Botanica Saraiva,Diogo F.; Paula,Cláudio C. de; Moraes,Paulo José de; Vinícius-Silva,Ronaldo; Silva,Mariana M.; Dias,Denise C.F.S.; Botelho,Soraya A.. ABSTRACT Ferruginous Rocky Outcrops have high levels of species richness and endemism, but have been threatened by several anthropic actions, especially mining. Eragrostis polytricha, a common grass species in the vegetation of these outcrops, has shown promising features for use in the recovery of mining areas. However, in order to fully understand the species’ potential for such use, its requirements for germination, seed dormancy break and seedling development must be determined. Thus, we aimed to: (1) assess the temperature conditions needed for seeds of E. polytricha to germinate; (2) evaluate the effects of KNO₃ in breaking seed dormancy; and (3) analyze the germination efficiency of seeds that are still in spikelets. The experiment included seven... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternating temperatures; Hairy sheath lovegrass; KNO₃; Mining areas; Native species. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300497 Seed size influence on germination responses to light and temperature of seven pioneer tree species from the Central Amazon Anais da ABC (AABC) Aud,Fabiana F.; Ferraz,Isolde D.K.. In Amazon secondary forests are dominated by pioneer species that typically produce large amounts of small and dormant seeds that are able to form a persistent soil seed bank. Seed dormancy in this group of species is overcome by environmental conditions found in open areas, such as high irradiation or alternating temperatures. Nevertheless, a variety of germination responses to environmental factors is known among pioneers; some of them may germinate in diffuse light or in darkness condition at constant temperature. Seed mass can be considered as one of the factors that promotes this variety. Regarding species with very small seeds, it seems that the trigger for germination is light and for larger seeds temperature alternation may be a more important... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternating temperatures; Germinability; Mean germination time; Photoblastic germination; Secondary forests; Tropical trees. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300018 Registros recuperados: 4 Primeira ... 1 ... Última

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