Improving the tolerance of vicia fabaagainst environmental salinity resulted from the irrigation with sea water by using k2 so4 and (nh4)2so4 as chemical osmoregulators. Reportar como inadecuado




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Vicia faba L. was cultivated with irrigation with 5, 10, 15 and 20% v:v sea water. The plants were divided to three groups. The first was irrigated without treatments while the second was treated with 5 mM KNO3 and the third was treated with 5mM NH42 SO4. The plants were left to grow until flowering stage. The famous solutes Na , K , Ca2 , Mg2 , Cl-, PO43-, SO42-, soluble carbohydrates, amino acids and soluble proteins were estimated to investigate the role of potassium nitrate and ammonium sulphates as osmoregulators. The results indicated that the non-treated group increased the soluble carbohydrates in the roots to avoid the influx of sodium. The treatment with KNO3 decreased the sodicity SAR in the shoots. The availability of nitrogen as nitrate or ammonium ions enhances the accumulation of soluble carbohydrates in shoots. KNO3 treatment decreased SAR strongly while NH42 SO4 treatment the SK:Na value in the shoots at higher salinity. The plants of all groups were depended on Ca2 as compatible solute more than Na and K .

Tipo de documento: Artículo - Article

Información adicional: La aceptación de manuscritos por parte de la revista implicará, además de su edición electrónica de acceso abierto bajo licencia Creative Commons CC Atribución-NoComercial-CompartirDerivadasIgual 3.0 http:-creativecommons.org-licenses-by-nc-sa-3.0-es-deed.es AR, la inclusión y difusión del texto completo a través del repositorio institucional  de la Universidad Nacional de Colombia y en todas aquellas bases de datos especializadas que el editor considere adecuadas para su indización con miras a incrementar la visibilidad de la revista.

Palabras clave: osmoregulation, irrigation, salinity. Sea water, Vicia faba





Fuente: http://www.bdigital.unal.edu.co


Introducción



Vol17-2D_Maquetación 1 1-10-12 20:42 Página 295 Acta biol.
Colomb., Vol.
17 n.º 2, 2012 295 - 308 IMPROVING THE TOLERANCE OF VICIA FABA AGAINST ENVIRONMENTAL SALINITY RESULTED FROM THE IRRIGATION WITH SEA WATER BY USING KNO3 AND (NH4)2SO4 AS CHEMICAL OSMOREGULATORS. Mejoramiento de la tolerancia de Vicia faba a salinidad ocasionada por irrigación con agua de mar usando KNO3 y (NH4)2SO4 como osmoreguladores químicos MOHAMED KAMEL1, Ph.
D. 1 Botany Department, Faculty of Sciences at Qena, South Valley University, BOX 83523, Qena, Egypt.
mohamedkamelahmed@yahoo.com Presentado el 30 de enero de 2012, aceptado el 2 de mayo de 2012, correcciones el 21 de junio de 2012. ABSTRACT The familiar solutes, Na , K , Ca2 , Mg2 , Cl-, PO43-, SO42-, soluble carbohydrates, amino acids and soluble proteins, which play a role in osmotic adjustment were estimated to investigate the role of potassium nitrate and ammonium sulphate as osmoregulators and their effects on the solutes composition.
Vicia faba L.
was cultivated and irrigated with 5, 10, 15 and 20 % (v:v) sea water.
The plants were divided to three groups.
The first was irrigated with sea water only.
The second was treated with 5 mM KNO3 while the third was treated with 5mM (NH4)2 SO4.
The plants were left to grow until flowering stage.
The results indicated that the non- treated group increased the soluble carbohydrates in the roots to avoid the influx of sodium.
The treatment with KNO3 decreased the sodicity (SAR) while (NH4)2 SO4 treatment decreased the SK:Na value in the shoots at higher salinity.
The availability of nitrogen as nitrate or ammonium ions enhances the accumulation of soluble carbohydrates in shoots.
The plants of all groups were depended on Ca2 , as compatible solute more than Na , and K . Key words: Osmoregulation, irrigation, salinity, sea water, Vicia faba. RESUMEN Los solutos Na , K , Ca2 , Mg2 , Cl-, PO43-, SO42-, carbohidratos y proteínas solubles, así como amino ácidos son importantes en ajus...






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