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

Growth, photosynthate partitioning and fructan accumulation in plants of Vernonia herbacea (Vell.) Rusby under two nitrogen levels

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Author(s):
Geraldo Rogério Faustini Cuzzuol [1] ; Maria Angela Machado de Carvalho [2] ; Lilian B.P. Zaidan [3]
Total Authors: 3
Affiliation:
[1] Instituto de Botânica. Seção de Fisiologia e Bioquímica de Plantas - Brasil
[2] Universidade Federal do Espírito Santo. Setor de Botânica. Departamento de Ciências Biológicas - Brasil
[3] Instituto de Botânica. Seção de Fisiologia e Bioquímica de Plantas - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Brazilian Journal of Plant Physiology; v. 17, n. 4, p. 401-410, 2005-12-00.
Abstract

The effect of two nitrogen concentrations on fructan accumulation and plant growth was analysed in plants of Vernonia herbacea during a year period. Plants of this species accumulate inulin-type fructans in the underground reserve organs (rhizophores). The plants were cultivated in glasshouse conditions and received weekly nutrient solutions containing 1.3 mmol.L-1 NO3- (N-limited) or 10.7 mmol.L-1 NO3- (N-sufficient). Plants treated with N-sufficient solution presented an increase in total growth with higher biomass, more but smaller leaves resulting in higher total leaf area, higher net assimilation rate, specific leaf mass and higher biomass allocation to aerial organs. In addition, these plants presented higher contents of reducing sugars and lower fructan contents. In contrast, N-limited plants showed reduced total growth with lower biomass, higher biomass allocation to underground organs and higher fructan contents. Therefore, although N-limited plants presented a higher fructan concentration, the amount of fructan produced per plant was similar in both N treatments. (AU)

FAPESP's process: 98/05124-8 - Conservation and sustainable use of the plant biodiversity from the cerrado and Atlantic Forest: the storage of carbohydrates and their role on the adaptation and maintainance of plants in their natural environment
Grantee:Marcos Silveira Buckeridge
Support Opportunities: BIOTA-FAPESP Program - Thematic Grants