Growth, biomass allocation and photosynthesis of Rolandra fruticosa (Asteraceae) in response to shade

Resumo

The effects of shade on growth, biomass allocation patterns and photosynthetic response was examined for Rolandra fruticosa (L.) Kuntze, a common perennial weed shrub in cultivated pastures and agricultural areas of Brazilian Amazonia, for plants grown in full sunlight and those shaded to 30 % of full sunlight over a 34-d period. Specific leaf area and leaf area ratio were higher for shade plants during all the experimental period. Shade plants allocated significantly less biomass to root tissue than sun plants and relative growth rate was higher in sun plants. Sun leaves had significantly higher dark respiration and light saturated rates of photosynthesis than shade leaves. The apparent quantum efficiency was higher for shade leaves, while light compensation point was higher for sun leaves. These results are discussed in relation to their ecological and weed management implications.

Resumo conforme Crossref.

Palavras-chave

• Biomassa
• Área Foliar
• Compositae
• Fotossíntese
• Sombreamento
• Taxa de Crescimento

Termos atribuídos na Alice (Embrapa) (incluindo Thesagro e NAL Thesaurus).

Fontes bibliográficas

Esta publicação está registrada em 4 fontes de metadados.

• Alice (Embrapa)Handle doc/404110Abrir registro em Alice (Embrapa) (nova aba)
• CrossrefDOI 10.1590/s0100-83582000000100007 · ISSN 0100-8358Abrir registro em Crossref (nova aba)
• Currículo LattesISSN 01008358Abrir registro em Currículo Lattes (nova aba)
• OpenAlexW2159080163 · DOI 10.1590/s0100-83582000000100007 · ISSN 0100-8358 · ISSN 1806-9681Abrir registro em OpenAlex (nova aba)