Phosphate forms in plant and their internal buffering in five soybean cultivars Report as inadecuate




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Roberto Ferreira Novais ; Luciana Aparecida Rodrigues ; Luis Vitor Silva do Sacramento ;Revista Brasileira de Ciência do Solo 2005, 29 2

Author: Hermínia Emília Prieto Martinez

Source: http://www.redalyc.org/


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Revista Brasileira de Ciência do Solo ISSN: 0100-0683 revista@sbcs.org.br Sociedade Brasileira de Ciência do Solo Brasil Martinez, Hermínia Emília Prieto; Novais, Roberto Ferreira; Rodrigues, Luciana Aparecida; Sacramento, Luis Vitor Silva do PHOSPHATE FORMS IN PLANT AND THEIR INTERNAL BUFFERING IN FIVE SOYBEAN CULTIVARS Revista Brasileira de Ciência do Solo, vol.
29, núm.
2, 2005, pp.
249-257 Sociedade Brasileira de Ciência do Solo Viçosa, Brasil Available in: http:--www.redalyc.org-articulo.oa?id=180214036010 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative PHOSPHATE FORMS IN PLANT AND THEIR INTERNAL BUFFERING IN FIVE SOYBEAN. 249 PHOSPHATE FORMS IN PLANT AND THEIR INTERNAL BUFFERING IN FIVE SOYBEAN CULTIVARS(1) Hermínia Emília Prieto Martinez(2), Roberto Ferreira Novais(3), Luciana Aparecida Rodrigues(4) & Luis Vitor Silva do Sacramento(5) SUMMARY Differences among plants in their ability to support nutritional stress periods may be caused by a differential vacuole capacity of ion storage and release and may also depend on the intensity of nutrient re-translocation under such conditions.
In five soybean cultivars, submitted to eight days of P deprivation, the dry matter production and the contents of three phosphorus (P) forms inorganic (Pi), organic (Po), and acid-soluble total (Pts) of different plant organs were determined.
Pi release velocity (RSPi) was estimated as the tangent to the equations obtained for Pi f(t) at the point t = 2 days (the mean point in the period δPi-δ δt expresses the rate of Pi release. of greatest Pi decrease), considering that -δ The internal Pi buffering capacity (IBCPi) was calculated as the inverse of the RSPi.
Cultivars’ differences in size of the non-metabolic Pi pool, RS...





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