Data/hora: 15/06/2024 16:19:29

Provedor de dados: | Scientia Agricola
País: | Brazil
Título: | Carbohydrate production and transport in cotton cultivars grown under boron deficiency
Autores: | Bogiani,Julio Cesar; Amaro,Amanda Cristina Esteves; Rosolem,Ciro Antonio.
Data: | 2013-12-01
Ano: | 2013
Palavras-chave: | Micronutrient; Nonstructural carbohydrates; Photosynthesis; Transpiration.
Resumo: | An adequate supply of boron (B) is required for the optimal growth and development of cotton (Gossypium hirsutum L.) plants, but the low phloem mobility of B limits the possibilities of correcting B deficiency. There are indications that different cotton cultivars could have different responses to B deficiency. The differences in responses of cotton cultivars to B regarding photoassimilate production and transport were studied in a greenhouse experiment with nutrient solution. Treatments consisted of three cotton cultivars (FMT 701, DP 604BG and FMX 993) and five concentrations of B (0.0, 2.5, 5.0, 10.0 and 20.0 µmol L−1). Sampling began at the phenological stage B1 (first square) and continued for four weeks. The leaf area and the number of reproductive branches and structures decreased due to B deficiency. A higher level of abortion of reproductive structures was observed under B deficiency. Boron deficiency increased the internal CO2 concentration but decreased the transpiration rate, stomatal conductance and photosynthesis. Despite the decrease in photosynthesis, nonstructural carbohydrates accumulated in the leaves due to decreased export to bolls in B-deficient plants. The response to B deficiency is similar among cotton cultivars, which shows that the variability for this trait is low even for cultivars with different genetic backgrounds.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600010
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162013000600010
Formato: | text/html
Fonte: | Scientia Agricola  v.70 n.6 2013
Fonte: | info:eu-repo/semantics/openAccess