Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 4
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Anatomical aspects of IBA-treated microcuttings of Gomphrena macrocephala St.-Hil BABT
Moreira,Míriam F.; Appezzato-da-Glória,Beatriz; Zaidan,Lilian B.P..
Gomphrena macrocephala St.-Hil. (Amaranthaceae) is a perennial herb from the cerrado with medicinal properties and ornamental interest. Plants can be micropropagated through nodal segments, but acclimatization is difficult. The aim of this study was to establish a relationship between anatomical aspects of the roots and the acclimatization process. When cultures were supplemented with IBA, callus and thick and frangible roots appeared at the base of the microcuttings. A fragile vascular connection between roots and shoots was observed. Abnormal adventitious roots showing alteration in the vascular cylinder and hypertrophy of the cortical cells were also noted. These roots interfere in the transfer to extra vitrum conditions. When no growth regulator was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gomphrena; Root anatomy; In vitro rooting; Indol butiric acid; Vascular connection.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200012
Imagem não selecionada

Imprime registro no formato completo
Crescimento e conteúdo de frutanos em plantas de Vernonia herbacea (Vell.) Rusby submetidas à adubação nitrogenada Rev. Bras. Bot.
Cuzzuol,Geraldo R.F.; Carvalho,Maria Angela M.; Barbedo,Claudio J.; Zaidan,Lilian B.P..
Vernonia herbacea acumula altas concentrações de frutanos do tipo inulina em seus órgãos subterrâneos de reserva, denominados rizóforos. Foi estudada a influência da adubação nitrogenada no crescimento dessa espécie e na produção de frutanos. Plantas obtidas a partir de fragmentos de rizóforos foram cultivadas em área de cerrado onde receberam três doses de nitrogênio: 6, 12 e 24 kg N.ha-1 na forma de (NH4)2SO4. Plantas jovens, com seis meses de idade, mostraram aumento em altura, área foliar e massa seca da parte aérea e dos rizóforos em resposta ao aumento da dose de nitrogênio. Por outro lado, o teor de frutanos decresceu com o aumento da concentração do nitrogênio. Após doze meses de cultivo, o crescimento das plantas foi estimulado apenas nas doses...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asteraceae; Cerrado; Frutano; Inulina; Crescimento vegetal.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000100009
Imagem não selecionada

Imprime registro no formato completo
Growth, photosynthate partitioning and fructan accumulation in plants of Vernonia herbacea (Vell.) Rusby under two nitrogen levels Braz. J. Plant Physiol.
Cuzzuol,Geraldo Rogério Faustini; Carvalho,Maria Angela Machado de; Zaidan,Lilian B.P..
The effect of two nitrogen concentrations on fructan accumulation and plant growth was analysed in plants of Vernonia herbacea during a year period. Plants of this species accumulate inulin-type fructans in the underground reserve organs (rhizophores). The plants were cultivated in glasshouse conditions and received weekly nutrient solutions containing 1.3 mmol.L-1 NO3- (N-limited) or 10.7 mmol.L-1 NO3- (N-sufficient). Plants treated with N-sufficient solution presented an increase in total growth with higher biomass, more but smaller leaves resulting in higher total leaf area, higher net assimilation rate, specific leaf mass and higher biomass allocation to aerial organs. In addition, these plants presented higher contents of reducing sugars and lower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asteraceae; Cerrado; Fructans; Underground reserve organs.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000400008
Imagem não selecionada

Imprime registro no formato completo
Vegetative responses to temperature and photoperiod in saplings of brazilwood (Caesalpinia echinata Lam., Leguminosae) Braz. J. Plant Physiol.
Rondon,Josimara N.; Zaidan,Lilian B.P.; Domingos,Marisa; Barbedo,Claudio J.; Figueiredo-Ribeiro,Rita de Cássia L..
Caesalpinia echinata Lam. (brazilwood) is an endangered tree species occurring along the eastern coast of Brazil from latitudes 5°56´S to 22°56´S. With such a range of distribution it is expected that temperature and daylength may affect plant development, which was examined in this study. One- and five-year-old saplings were grown under controlled photoperiods of 8 h, 12 h and 20 h, and in a greenhouse under natural light during 16 months. In another experiment, one-year-old saplings were cultivated for six months in a growth cabinet, with reduced maximum temperature, and in the greenhouse. Leaf number, stem height and stem diameter at the soil surface were evaluated every two months (experiment 1) or every month (experiment 2). In experiment 1, no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic forest; Endangered species; Tree growth.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000400004
Registros recuperados: 4
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional