Genotypic Variation of Cut Chrysanthemum Response to High CO2 Concentration: Growth, Time to Flowering and Visual Quality

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2011

Autores

Fanourakis, D (Autor) Outra; Heuvelink, E (Autor) Outra; Maaswinkel, R (Autor) Outra; Carvalho, SMP (Autor) Outra

Ata de Conferência Internacional

Título: INTERNATIONAL SYMPOSIUM ON HIGH TECHNOLOGY FOR GREENHOUSE SYSTEMS: GREENSYS2009

Páginas: 839-848

International Symposium on High Technology for Greenhouse Systems (GreenSys)

Quebec City, CANADA, APR 30, 2011

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Classificação Científica

FOS: Ciências agrárias > Agricultura, silvicultura e pescas

Outras Informações

ID Authenticus: P-008-0FV

DOI: 10.17660/actahortic.2011.893.92

Abstract (EN): In this study sixteen cut chrysanthemum cultivars were used to evaluate the effects of high CO2 concentration (1500 mu mol mol(-1)) on growth, time to flowering and visual quality as compared to the concentration used in commercial greenhouses (600 mu mol mol(-1)). CO2 enrichment increased light use efficiency (11-41%) and total plant dry mass (TDM) (5-40%) in a cultivar dependent manner. This TDM increase was a result of: (i) higher relative growth rate during the long day period (i.e., 0 to 2 weeks; LD); and (ii) higher absolute growth rate both during the period between 2 to 6 weeks (SD1), and 6 weeks to final harvest (SD2). Cultivar differences in TDM at flowering between the two CO2 concentrations could be explained by differences in growth rate during the LD and SD2 periods. Furthermore, growing at high CO2 regime enhanced the number of flowers and flower buds per plant (NoF, 4-48%). Interestingly, the cultivars that showed the highest percentage of TDM increase, with CO2 enrichment, were not the ones that had the highest increase in the percentage of NoF. In contrast, high CO2 concentration had only a minor or no effect on the number of internodes on the main stem and on the reaction time in all the cultivars examined. From this research it is concluded that there is a large variation in the response of cut chrysanthemum cultivars to CO2 enrichment, in terms of TDM and NoF, which gives possibilities for breeding.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10