Initial development and gas exchange of Talisia subalbens (Mart.) Radlk. under different shading conditions

• Autor(a) principal: Nery, Fernanda Carlota
• Data de Publicação: 2010
• Outros Autores: Oliveira, Hilton Morbeck de, Alvarenga, Amauri Alves de, Dousseau, Sara, Castro, Evaristo Mauro de, Campos, Ana Carolina Atala Lombelo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/11955
• topic: Plantas – Efeito da luz; Plantas dos cerrados; Áreas degradadas; Recuperação ambiental; Plants – Effect of light; Cerrado plants; Degraded areas; Environmental restoration; Talisia subalbens

Ecophysiological studies under semi-controlled conditions in nurseries and greenhouses are essential to enable the use of native species to recover degraded areas and for commercial planting. Talisia subalbens (Mart) Radlk, 'cascudo', is a native fruiting species of the Cerrado on the verge of extinction. The ecophysiological performance of this species was evaluated in nursery conditions under different levels of shading (full sunshine, 30%, 50% and 70%). Initial growth, biomass allocation, gas exchange and chlorophyll content of the plants were analyzed. Full sunshine cultivated plants showed a higher accumulation of total, shoot, and root dry biomass. There was no significant difference in the root/shoot ratio among the treatments. Seedlings cultivated under full sunshine and 30% shading showed higher values for height, basal diameter, and leaf area. Differences in stomata conductance and photosynthesis rate were not observed among the different shading levels. Plants cultivated under 70% of shading had higher contents of chlorophyll a, b, and total. During the initial phase with higher levels of radiation were fundamental for the development of T. subalbens seedlings.