Plant architecture of Paspalum vaginatum schwartz modified by nitrate and ammonium nutrition

Author:

Beltrano José1,Ronco Marta Guillermina1,Barreiro Roberto1,Montaldi Edgardo Raúl1

Affiliation:

1. Instituto de Fisiología Vegetal (INFIVE), Argentina

Abstract

Paspalum vaginatum Schwartz plants were grown under greenhouse conditions in a continuous-flow hydroponic culture, containing NO3- or NH4+or NH4NO3 as nitrogen source. After 30 days, the size of aerial biomass and root system decreased significantly when plants were supplied with NH4+as exclusive nitrogen source. Compared to NO3- treatment, reducing and non-reducing sugars were decreasing together with a significant increase in amino acids content. NH4+-nutrition caused tillers to grow toward an orthogravitropic position (average angle of 68° with respect to the horizontal), and with NO3--nutrition, tillers tended to become diagravitropic (average angle of 23°). With NH4NO3 all the parameters measured had values in between those of the other two sources. Thus, the morphologic differences among plants growing in NO3- or NH4+ nutrition confirm the hypothesis that nitrogen source determines the growth habit of tillers in P. vaginatum by modulating the endogenous levels of reducing-non-reducing sugars.

Publisher

FapUNIFESP (SciELO)

Subject

Agronomy and Crop Science,Animal Science and Zoology

Reference37 articles.

1. The control of tillering in the barley plant: I. The pattern of tillering and its relation to nutrient supply;ASPINAL D.;Australian Journal of Biological Science,1961

2. Nitrogen and carbon metabolism;BASSHAM J.A.,1981

3. Efecto del nitrato de amonio y del ácido giberélico sobre la brotación del cípero (Cyperus rotundus L.);BETRIA A.;Revista de la Facultad de Agronomía,1976

4. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding;BRADFORD M.M.;Analytical Biochemistry,1976

5. Compared effects of and on growth and metabolism of French bean;CHAILLOU S.;Physiologia Plantarum,1986

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