|
|
Registros recuperados : 269 | |
Registros recuperados : 269 | |
|
|
Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Unidades Centrais. |
Data corrente: |
04/08/1999 |
Data da última atualização: |
25/01/2021 |
Autoria: |
DIAS-FILHO, M. B. |
Afiliação: |
MOACYR BERNARDINO DIAS FILHO, CPATU. |
Título: |
Physiological responses of two tropical weeds to shade. I. growth and biomass allocation. |
Ano de publicação: |
1999 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 34, n. 6, p. 945-952, jun. 1999. |
Idioma: |
Inglês Português |
Conteúdo: |
Ipomoea asarifolia (Desr.) Roem. & Schultz (Convolvulaceae) and Stachytarpheta cayennensis (Rich) Vahl. (Verbenaceae), two weeds found in pastures and crop areas in Brazilian Amazonia, were grown in controlled environment cabinets under high (800-1000 umol m-2 s-1) and low (200-350 umol m-2 s-1) light regimes during a 40-day period. For both species leaf dry mass and leaf area per total plant dry mass, and leaf area per leaf dry mass were higher for low-light plants, whereas root mass per total plant dry mass was higher for high-light plants. High-light S. cayennensis allocated significantly more biomass to reproductive tissue than low-light plants, suggesting a probably lower ability of this species to maintain itself under shaded conditions. Relative growth rate (RGR) in I. asarifolia was initially higher for high-light grown plants and after 20 days started decreasing, becoming similar to low-light plants at the last two harvests (at 30 and 40 days). In S. cayennensis, RGR was also higher for high-light plants; however, this trends was not significant at the first and last harvest dates (10 and 40 days). These results are discussed in relation to their ecological and weed management implications. |
Palavras-Chave: |
Allocation patterns; Alocacao de biomassa; Analise de crescimento; Brasil; Growth analysis; Growth rate; Ipomoea asarifolia. |
Thesagro: |
Fisiologia Vegetal; Stachytarpheta Cayennensis; Taxa de Crescimento. |
Thesaurus NAL: |
Amazonia; biomass; plant physiology. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/11430/1/pab394_96i.pdf
|
Marc: |
LEADER 02046naa a2200277 a 4500 001 1373192 005 2021-01-25 008 1999 bl uuuu u00u1 u #d 100 1 $aDIAS-FILHO, M. B. 245 $aPhysiological responses of two tropical weeds to shade. I. growth and biomass allocation. 260 $c1999 520 $aIpomoea asarifolia (Desr.) Roem. & Schultz (Convolvulaceae) and Stachytarpheta cayennensis (Rich) Vahl. (Verbenaceae), two weeds found in pastures and crop areas in Brazilian Amazonia, were grown in controlled environment cabinets under high (800-1000 umol m-2 s-1) and low (200-350 umol m-2 s-1) light regimes during a 40-day period. For both species leaf dry mass and leaf area per total plant dry mass, and leaf area per leaf dry mass were higher for low-light plants, whereas root mass per total plant dry mass was higher for high-light plants. High-light S. cayennensis allocated significantly more biomass to reproductive tissue than low-light plants, suggesting a probably lower ability of this species to maintain itself under shaded conditions. Relative growth rate (RGR) in I. asarifolia was initially higher for high-light grown plants and after 20 days started decreasing, becoming similar to low-light plants at the last two harvests (at 30 and 40 days). In S. cayennensis, RGR was also higher for high-light plants; however, this trends was not significant at the first and last harvest dates (10 and 40 days). These results are discussed in relation to their ecological and weed management implications. 650 $aAmazonia 650 $abiomass 650 $aplant physiology 650 $aFisiologia Vegetal 650 $aStachytarpheta Cayennensis 650 $aTaxa de Crescimento 653 $aAllocation patterns 653 $aAlocacao de biomassa 653 $aAnalise de crescimento 653 $aBrasil 653 $aGrowth analysis 653 $aGrowth rate 653 $aIpomoea asarifolia 773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 34, n. 6, p. 945-952, jun. 1999.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|