The uptake of macronutrients by an active silicon accumulator plant growing in two different substrata

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Abstract

Pennisetum clandestinum (Graminae/Poaceae) an active Si-accumulator, was cultivated in two different substrata, both with reduced Si solubility. Plants growing in organic-rich soils contained much less Ca, K, Na and Si, than species growing in sandy soils. Although the highest macronutrient concentrations were associated to the highest Si levels in the organs of P. clandestinum, the R correlation values indicate that Si does not influence the internal balance and the uptake of these elements. In ca 65% of the cases roots have the highest average values regardless of the type of culture, while the contents of Mg in the shoots and roots of P. clandestinum were generally not significantly different (P>0.05). A significant decline of the macronutrient levels associated to the shoots and roots of P. clandestinum was observed from the 4th to the 6th month assay, especially for Ca in both organs, while for Mg and Na the decline is focused mainly in the shoots; K and Si decline is generally below 10%. When average values of Si in shoots and roots of plants collected from organic- rich and sandy soils were plotted against the average concentrations of Ca, K, Mg and Na in the same organs, weak but positive R correlation values were obtained - the highest R values were observed for Na and K and the lowest for Ca and Mg, regardless of the culture. Exception for the high R value observed for K, although the influence of Si on the K status in the whole plant is time-depending - R values, diminished from the 4th to the 6th month, as it happens in the majority of the cases. In conclusion, P. clandestinum can grow well and healthily in substrata with acid pH values and high carbonate content and low solubility of Si suggesting that the definition of the essentiality of Si, even in a Si-accumulator plant is still a matter of great controversy.
Original languageEnglish
Pages (from-to)986-993
JournalEmirates Journal of Food and Agriculture
Volume25
Issue number12(SI)
DOIs
Publication statusPublished - Dec 2013

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Pennisetum clandestinum
Silicon
silicon
Soil
Solubility
Plant Shoots
shoots
Pennisetum
Plant Roots
Carbonates
sandy soils
solubility
Poaceae
Acids
carbonates
acids
assays
soil

Keywords

  • Macronutrients
  • Organic-rich soil cultures
  • Pennisetum clandestinum
  • Sand cultures
  • Silicon

Cite this

@article{81d560bd3e274f1cbf1d79db7d9aa204,
title = "The uptake of macronutrients by an active silicon accumulator plant growing in two different substrata",
abstract = "Pennisetum clandestinum (Graminae/Poaceae) an active Si-accumulator, was cultivated in two different substrata, both with reduced Si solubility. Plants growing in organic-rich soils contained much less Ca, K, Na and Si, than species growing in sandy soils. Although the highest macronutrient concentrations were associated to the highest Si levels in the organs of P. clandestinum, the R correlation values indicate that Si does not influence the internal balance and the uptake of these elements. In ca 65{\%} of the cases roots have the highest average values regardless of the type of culture, while the contents of Mg in the shoots and roots of P. clandestinum were generally not significantly different (P>0.05). A significant decline of the macronutrient levels associated to the shoots and roots of P. clandestinum was observed from the 4th to the 6th month assay, especially for Ca in both organs, while for Mg and Na the decline is focused mainly in the shoots; K and Si decline is generally below 10{\%}. When average values of Si in shoots and roots of plants collected from organic- rich and sandy soils were plotted against the average concentrations of Ca, K, Mg and Na in the same organs, weak but positive R correlation values were obtained - the highest R values were observed for Na and K and the lowest for Ca and Mg, regardless of the culture. Exception for the high R value observed for K, although the influence of Si on the K status in the whole plant is time-depending - R values, diminished from the 4th to the 6th month, as it happens in the majority of the cases. In conclusion, P. clandestinum can grow well and healthily in substrata with acid pH values and high carbonate content and low solubility of Si suggesting that the definition of the essentiality of Si, even in a Si-accumulator plant is still a matter of great controversy.",
keywords = "Macronutrients, Pennisetum clandestinum, Organic-rich soil cultures, Silicon, Sand cultures, Macronutrients, Organic-rich soil cultures, Pennisetum clandestinum, Sand cultures, Silicon",
author = "Reboredo, {Fernando Henrique da Silva} and Lidon, {Fernando Jos{\'e} Cebola} and Pessoa, {Maria Fernanda} and Duarte, {Maria Paula Amaro de Castilho} and Silva, {Maria J.}",
year = "2013",
month = "12",
doi = "10.9755/ejfa.v25i12.16735",
language = "English",
volume = "25",
pages = "986--993",
journal = "Emirates Journal of Food and Agriculture",
issn = "2079-052X",
publisher = "UNITED ARAB EMIRATES UNIV",
number = "12(SI)",

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TY - JOUR

T1 - The uptake of macronutrients by an active silicon accumulator plant growing in two different substrata

AU - Reboredo, Fernando Henrique da Silva

AU - Lidon, Fernando José Cebola

AU - Pessoa, Maria Fernanda

AU - Duarte, Maria Paula Amaro de Castilho

AU - Silva, Maria J.

PY - 2013/12

Y1 - 2013/12

N2 - Pennisetum clandestinum (Graminae/Poaceae) an active Si-accumulator, was cultivated in two different substrata, both with reduced Si solubility. Plants growing in organic-rich soils contained much less Ca, K, Na and Si, than species growing in sandy soils. Although the highest macronutrient concentrations were associated to the highest Si levels in the organs of P. clandestinum, the R correlation values indicate that Si does not influence the internal balance and the uptake of these elements. In ca 65% of the cases roots have the highest average values regardless of the type of culture, while the contents of Mg in the shoots and roots of P. clandestinum were generally not significantly different (P>0.05). A significant decline of the macronutrient levels associated to the shoots and roots of P. clandestinum was observed from the 4th to the 6th month assay, especially for Ca in both organs, while for Mg and Na the decline is focused mainly in the shoots; K and Si decline is generally below 10%. When average values of Si in shoots and roots of plants collected from organic- rich and sandy soils were plotted against the average concentrations of Ca, K, Mg and Na in the same organs, weak but positive R correlation values were obtained - the highest R values were observed for Na and K and the lowest for Ca and Mg, regardless of the culture. Exception for the high R value observed for K, although the influence of Si on the K status in the whole plant is time-depending - R values, diminished from the 4th to the 6th month, as it happens in the majority of the cases. In conclusion, P. clandestinum can grow well and healthily in substrata with acid pH values and high carbonate content and low solubility of Si suggesting that the definition of the essentiality of Si, even in a Si-accumulator plant is still a matter of great controversy.

AB - Pennisetum clandestinum (Graminae/Poaceae) an active Si-accumulator, was cultivated in two different substrata, both with reduced Si solubility. Plants growing in organic-rich soils contained much less Ca, K, Na and Si, than species growing in sandy soils. Although the highest macronutrient concentrations were associated to the highest Si levels in the organs of P. clandestinum, the R correlation values indicate that Si does not influence the internal balance and the uptake of these elements. In ca 65% of the cases roots have the highest average values regardless of the type of culture, while the contents of Mg in the shoots and roots of P. clandestinum were generally not significantly different (P>0.05). A significant decline of the macronutrient levels associated to the shoots and roots of P. clandestinum was observed from the 4th to the 6th month assay, especially for Ca in both organs, while for Mg and Na the decline is focused mainly in the shoots; K and Si decline is generally below 10%. When average values of Si in shoots and roots of plants collected from organic- rich and sandy soils were plotted against the average concentrations of Ca, K, Mg and Na in the same organs, weak but positive R correlation values were obtained - the highest R values were observed for Na and K and the lowest for Ca and Mg, regardless of the culture. Exception for the high R value observed for K, although the influence of Si on the K status in the whole plant is time-depending - R values, diminished from the 4th to the 6th month, as it happens in the majority of the cases. In conclusion, P. clandestinum can grow well and healthily in substrata with acid pH values and high carbonate content and low solubility of Si suggesting that the definition of the essentiality of Si, even in a Si-accumulator plant is still a matter of great controversy.

KW - Macronutrients

KW - Pennisetum clandestinum

KW - Organic-rich soil cultures

KW - Silicon

KW - Sand cultures

KW - Macronutrients

KW - Organic-rich soil cultures

KW - Pennisetum clandestinum

KW - Sand cultures

KW - Silicon

U2 - 10.9755/ejfa.v25i12.16735

DO - 10.9755/ejfa.v25i12.16735

M3 - Article

VL - 25

SP - 986

EP - 993

JO - Emirates Journal of Food and Agriculture

JF - Emirates Journal of Food and Agriculture

SN - 2079-052X

IS - 12(SI)

ER -