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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

PHOTOSYNTHESIS RATE, CHLOROPHYLL CONTENT AND INITIAL DEVELOPMENT OF PHYSIC NUT WITHOUT MICRONUTRIENT FERTILIZATION

Texto completo
Autor(es):
dos Santos, Elcio Ferreira [1] ; Zanchim, Bruno Jose [1] ; de Campos, Aline Grella [1] ; Garrone, Raphael Florencio [1] ; Lavres Junior, Jose [2]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, CENA, BR-13416000 Piracicaba, SP - Brazil
[2] CENA, Plant Mineral Nutr Lab, Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Revista Brasileira de Ciência do Solo; v. 37, n. 5, p. 1334-1342, SEP-OCT 2013.
Citações Web of Science: 6
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. (AU)

Processo FAPESP: 10/12411-7 - Diagnose visual e nutricional e testes bioquímicos em pinhão-manso em função das deficiências de macronutrientes
Beneficiário:Raphael Florencio Garrone
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 11/15208-0 - Testes bioquímicos e fisiológicos em pinhão-manso para previsão de desordens nutricionais de macronutrientes
Beneficiário:Elcio Ferreira dos Santos
Linha de fomento: Bolsas no Brasil - Mestrado