Variations in the composition of the sap of zea mays with the increase in osmotic pressure of the nutritive solution |
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| Authors: | M P Sánchez Conde P Azuara |
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| Institution: | Instituto de Edafología , Biología Vegetal Serrano , 115‐bis, Madrid‐6, Espa?a |
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| Abstract: | The alterations are studied which are produced in the content of mineral elements and organic fractions of sap with the increase in the osmotic pressure of the nutritive solution at levels of 2.0; 3.5 and 5.0 atm., obtained through the addition to the nutritive solution either of magnesium sulphate or PEG‐4000. Through the effect of the osmotic pressure, the transformations are modified of the nitrogen and mineral phosphorus at organic fractions experience a series of modifications which produce different values in the Nm%TSN and Pm%TSP ratios with respect to control. Through action of the specific effect of magnesium sulphate, the reducing sugars concentrations in sap having an important increase. |
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| Keywords: | Maize young plants osmotic pressure sap composition mineral elements organic fractions |
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