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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Photosynthesis rate, chlorophyll content and initial development of physic nut without micronutrient fertilization

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Author(s):
dos Santos, Elcio Ferreira [1] ; Zanchim, Bruno Jose [1] ; de Campos, Aline Grella [1] ; Garrone, Raphael Florencio [1] ; Lavres Junior, Jose [2]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, CENA, BR-13416000 Piracicaba, SP - Brazil
[2] CENA, Plant Mineral Nutr Lab, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Revista Brasileira de Ciência do Solo; v. 37, n. 5, p. 1334-1342, SEP-OCT 2013.
Web of Science Citations: 6
Abstract

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)

FAPESP's process: 11/15208-0 - Biochemical and physiological tests on jatropha for prediction of nutritional disorders of macronutrients
Grantee:Elcio Ferreira dos Santos
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 10/12411-7 - Visual and nutritional diagnosis and biochemical assays in physic nuts as related to macronutrient deficiencies
Grantee:Raphael Florencio Garrone
Support Opportunities: Scholarships in Brazil - Scientific Initiation