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Provedor de dados:  Rev. Bras. Ciênc. Solo
País:  Brazil
Título:  Photosynthesis rate, chlorophyll content and initial development of physic nut without micronutrient fertilization
Autores:  Santos,Elcio Ferreira dos
Zanchim,Bruno José
Campos,Aline Grella de
Garrone,Raphael Florencio
Lavres Junior,José
Data:  2013-10-01
Ano:  2013
Palavras-chave:  Jatropha curcas L.
Nutritional status
Dry matter
IRGA
SPAD
Resumo:  Few studies in Brazil have addressed the need for micronutrients of physic nut focusing on physiological responses, especially in terms of photosynthesis. The objective of this study was to evaluate the effects of omission of boron (B), copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn) on Jatropha curcas L.. The experimental design was a randomized block with four replications. The treatments were complete solution (control) and solution without B, Cu, Fe, Mn, and Zn. We evaluated the chlorophyll content (SPAD units), photosynthetic rate, dry matter production and accumulation of micronutrients in plants, resulting from different treatments. The first signs of deficiency were observed for Fe and B, followed by Mn and Zn, while no symptoms were observed for Cu deficiency. The micronutrient omission reduced the dry matter yield, chlorophyll content and photosynthetic rate of the plants differently for each omitted nutrient. It was, however, the omission of Fe that most affected the development of this species in all parameters evaluated. The treatments negatively affected the chlorophyll content, evaluated in SPAD units, and the photosynthetic rate, except for the omission of B. However this result was probably due to the concentration effect, since there was a significant reduction in the dry matter production of B-deficient plants.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500022
Editor:  Sociedade Brasileira de Ciência do Solo
Relação:  10.1590/S0100-06832013000500022
Formato:  text/html
Fonte:  Revista Brasileira de Ciência do Solo v.37 n.5 2013
Direitos:  info:eu-repo/semantics/openAccess
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