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En 2004, el níquel fue reconocido por la Asociación Americana Oficial de Control de Nutrientes Vegetales, como elemento esencial en plantas, dada su función de catalizador o inhibidor y constituyente con la enzima ureasa.<\/p>\r\n\r\n

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\"\r\n\r\n\t\r\n\t\t\r\n\t\t\t
\r\n\t\t\t

Figura 1. Deficiencia de Ni en hojas de leguminosas. <\/strong><\/span><\/p>\r\n\r\n\t\t\t

(McCarroll, 2011). <\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n

\r\n

El níquel es requerido por las plantas superiores en bajas concentraciones, pues es necesario en el metabolismo del nitrógeno y la germinación de la planta. Sin embargo, a altas concentraciones es fitotóxico, ya que inhibe la actividad enzimática, el crecimiento, el metabolismo y la nutrición mineral.<\/p>\r\n\r\n

 La ureasa cataliza la hidrólisis de la urea, reacción que divide la molécula en amonio y dióxido de carbono. La deficiencia de Ni inhibe la acción de la ureasa y esta condición lleva a la acumulación de urea que provoca la presencia de manchas necróticas en las hojas. La deficiencia de Ni perturba el metabolismo de los ureidos, aminoácidos y ácidos orgánicos y se acumula ácido oxálico y láctico. Estos efectos sugieren que el Ni tiene varios roles importantes en el metabolismo de las plantas superiores.<\/p>\r\n<\/div>\r\n<\/div>\r\n\r\n

La ureasa es la única enzima conocida en las plantas superiores que contiene níquel, aunque los microorganismos fijadores de nitrógeno necesitan níquel para la enzima que reincorpora parte del hidrógeno gaseoso generado durante la fijación (el hidrógeno incorpora a la hidrogenasa). Algunas bacterias como el Rhizobium<\/em> tienen dependencia del níquel.<\/p>\r\n\r\n

Las plantas con carencia de níquel acumulan urea en sus hojas y como consecuencia los extremos de las hojas muestran necrosis.<\/strong><\/p>\r\n\r\n

Causas de la deficiencia de níquel<\/strong><\/p>\r\n\r\n

 La deficiencia de Ni puede presentarse por bajos contenidos del nutriente en formas disponibles en el suelo, o puede ser inducida por varios factores como los siguientes:<\/p>\r\n\r\n

    \r\n\t
  • Alcalinidad relativamente elevada del suelo.<\/li>\r\n\t
  • Altos contenidos de Ca, Mg, Cu o Zn que inhiben la absorción de Ni.<\/li>\r\n\t
  • Reducción de la disponibilidad por excesiva aplicación de cal.<\/li>\r\n\t
  • Altos niveles de P del suelo que reduce la disponibilidad de Ni en el suelo o dentro de la misma planta.<\/li>\r\n\t
  • Nemátodos que dañan el sistema radicular y evitan la absorción de nutrientes.<\/li>\r\n<\/ul>\r\n\r\n

    Usos prácticos del níquel<\/strong><\/p>\r\n\r\n

    Se han realizado experimentos con cebada, papa y habas y se obtuvieron incrementos en rendimiento gracias a la aplicación foliar de Ni.<\/p>\r\n\r\n

    \r\n
     <\/div>\r\n\r\n
    \"\r\n\r\n\t\r\n\t\t\r\n\t\t\t
    \r\n\t\t\t

    Figura 2. Influencia de aplicaciones foliares de Ni en brotes de árboles deficientes de Ni. La planta de la derecha deficiente en Ni, mientras que la de la izquierda ha sido tratada con una aplicación foliar de Ni. <\/strong><\/span><\/p>\r\n\r\n\t\t\t

    (Wood y Reilly, 2004).<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n\r\n

    Algunas plantas, como el nogal pecanero, necesitan especialmente el níquel, ya que sin una cantidad suficiente, la enzima que convierte la urea en amoniaco no actúa, por lo que la urea puede acumularse hasta alcanzar una concentración nociva para el árbol. En los nogales pecaneros, la carencia de níquel puede producir deformaciones físicas, un rendimiento más bajo, caída prematura del fruto, fotosíntesis reducida, una mayor susceptibilidad a la sarna y menor supervivencia.<\/em><\/strong><\/p>\r\n\r\n

    \r\n
     <\/div>\r\n\r\n
    \"\r\n\r\n\t\r\n\t\t\r\n\t\t\t
    \r\n\t\t\t

    Figura 3. Influencia de la aplicación foliar de níquel. La rama en el lado izquierdo del árbol fue tratada con Ni poco después de la brotación, mientras que la parte derecha de los árboles no fue tratada. <\/strong><\/span><\/p>\r\n\r\n\t\t\t

    (Wood y Reilly, 2004).<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n\r\n

    La deficiencia de níquel en leguminosas y en otras dicotiledóneas ocasiona una disminución en la actividad de la enzima ureasa, condición que provoca la acumulación de niveles tóxicos de urea y se manifiesta como una necrosis en la punta de las hojas. En soya, niveles bajos de Ni en el suelo pueden disminuir la nodulación y el rendimiento en semilla, fenómeno que se explica por la participación del Ni en la enzima hidrogenasa de las bacterias nitrificantes.<\/p>\r\n\r\n

    Fuente:<\/strong><\/p>\r\n\r\n

      \r\n\t
    • Kutman, B.Y., Kutman, U.B. and Cakmak, I. 2014.  Effects of seed nickel reserves or externally supplied nickel on the growth, nitrogen metabolites and nitrogen use efficiency of urea- or nitrate-fed soybean. Plant and Soil 376:261-276.<\/li>\r\n\t
    • Malavolta, E., and M. F. Moraes. 2007. Nickel- from toxic to essential nutrient. Better Crops with Plant Food 91(3): 26-27.<\/li>\r\n\t
    • Wood, B.W., Reilly, C.C., and Nyczepir, A.P. Nyczepir. 2004. Mouse-ear of Pecan: a Nickel Deficiency. Hortscience 36(6): 1238-1242.<\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/div>\r\n","has_cost":0,"creation":"2015-06-10 19:53:39","updated":"2019-04-21 23:44:24","published":"2015-06-10 20:28:06","cost":0,"badge":"mxn"},"availPoints":0,"articleCosts":[],"conversion":[0.004400000000000000265065747129256124026142060756683349609375,1,5634,19],"guest":true,"countries":[{"country_ID":1,"name":"Argentina","iso2":"ar","badge":"USD","conversion":19},{"country_ID":2,"name":"Belice","iso2":"bz","badge":"USD","conversion":19},{"country_ID":3,"name":"Bolivia","iso2":"bo","badge":"USD","conversion":19},{"country_ID":4,"name":"Canada","iso2":"ca","badge":"USD","conversion":19},{"country_ID":5,"name":"Chile","iso2":"cl","badge":"USD","conversion":19},{"country_ID":6,"name":"Colombia","iso2":"co","badge":"COP","conversion":0.004400000000000000265065747129256124026142060756683349609375},{"country_ID":7,"name":"Costa Rica","iso2":"cr","badge":"USD","conversion":19},{"country_ID":8,"name":"Cuba","iso2":"cu","badge":"USD","conversion":19},{"country_ID":9,"name":"Ecuador","iso2":"ec","badge":"USD","conversion":19},{"country_ID":10,"name":"El Salvador","iso2":"sv","badge":"USD","conversion":19},{"country_ID":11,"name":"Estados Unidos","iso2":"us","badge":"USD","conversion":19},{"country_ID":12,"name":"Guatemala","iso2":"gt","badge":"USD","conversion":19},{"country_ID":13,"name":"Guyana","iso2":"gy","badge":"USD","conversion":19},{"country_ID":14,"name":"Guayana Francesa","iso2":"gf","badge":"USD","conversion":19},{"country_ID":15,"name":"Honduras","iso2":"hn","badge":"USD","conversion":19},{"country_ID":16,"name":"México","iso2":"mx","badge":"MXN","conversion":1},{"country_ID":17,"name":"Nicaragua","iso2":"ni","badge":"USD","conversion":19},{"country_ID":18,"name":"Panamá","iso2":"pa","badge":"USD","conversion":19},{"country_ID":19,"name":"Paraguay","iso2":"py","badge":"USD","conversion":19},{"country_ID":20,"name":"Perú","iso2":"pe","badge":"PEN","conversion":5634},{"country_ID":21,"name":"Puerto Rico","iso2":"pr","badge":"USD","conversion":19},{"country_ID":22,"name":"Rep. 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La deficiencia de Ni inhibe la acción de la ureasa y esta condición lleva a la acumulación de urea que provoca la presencia de manchas necróticas en las hojas. La deficiencia de Ni perturba el metabolismo de los ureidos, aminoácidos y ácidos orgánicos y se acumula ácido oxálico y láctico.","fb_desc":"","thumb":"\/assets\/images\/articulos\/categoria1\/2nutricion%20vegetal\/art154-niquel-esencial-para-absorcion-de-n\/Niquel-esencial-en-absorcion-de-nitrogeno.jpg","fb_thumb":"","category":6,"related":"","keywords":"niquel,esencial,absorcion,nitrogeno","pdfLink":"Articulos\/Nutricion Vegetal\/35. El Ni esencial para la absorcion del N.pdf","text":"
      \r\n
      \r\n

      En 2004, el níquel fue reconocido por la Asociación Americana Oficial de Control de Nutrientes Vegetales, como elemento esencial en plantas, dada su función de catalizador o inhibidor y constituyente con la enzima ureasa.<\/p>\r\n\r\n

      \r\n
      \"\r\n\r\n\t\r\n\t\t\r\n\t\t\t
      \r\n\t\t\t

      Figura 1. Deficiencia de Ni en hojas de leguminosas. <\/strong><\/span><\/p>\r\n\r\n\t\t\t

      (McCarroll, 2011). <\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n

      \r\n

      El níquel es requerido por las plantas superiores en bajas concentraciones, pues es necesario en el metabolismo del nitrógeno y la germinación de la planta. Sin embargo, a altas concentraciones es fitotóxico, ya que inhibe la actividad enzimática, el crecimiento, el metabolismo y la nutrición mineral.<\/p>\r\n\r\n

       La ureasa cataliza la hidrólisis de la urea, reacción que divide la molécula en amonio y dióxido de carbono. La deficiencia de Ni inhibe la acción de la ureasa y esta condición lleva a la acumulación de urea que provoca la presencia de manchas necróticas en las hojas. La deficiencia de Ni perturba el metabolismo de los ureidos, aminoácidos y ácidos orgánicos y se acumula ácido oxálico y láctico. Estos efectos sugieren que el Ni tiene varios roles importantes en el metabolismo de las plantas superiores.<\/p>\r\n<\/div>\r\n<\/div>\r\n\r\n

      La ureasa es la única enzima conocida en las plantas superiores que contiene níquel, aunque los microorganismos fijadores de nitrógeno necesitan níquel para la enzima que reincorpora parte del hidrógeno gaseoso generado durante la fijación (el hidrógeno incorpora a la hidrogenasa). Algunas bacterias como el Rhizobium<\/em> tienen dependencia del níquel.<\/p>\r\n\r\n

      Las plantas con carencia de níquel acumulan urea en sus hojas y como consecuencia los extremos de las hojas muestran necrosis.<\/strong><\/p>\r\n\r\n

      Causas de la deficiencia de níquel<\/strong><\/p>\r\n\r\n

       La deficiencia de Ni puede presentarse por bajos contenidos del nutriente en formas disponibles en el suelo, o puede ser inducida por varios factores como los siguientes:<\/p>\r\n\r\n

        \r\n\t
      • Alcalinidad relativamente elevada del suelo.<\/li>\r\n\t
      • Altos contenidos de Ca, Mg, Cu o Zn que inhiben la absorción de Ni.<\/li>\r\n\t
      • Reducción de la disponibilidad por excesiva aplicación de cal.<\/li>\r\n\t
      • Altos niveles de P del suelo que reduce la disponibilidad de Ni en el suelo o dentro de la misma planta.<\/li>\r\n\t
      • Nemátodos que dañan el sistema radicular y evitan la absorción de nutrientes.<\/li>\r\n<\/ul>\r\n\r\n

        Usos prácticos del níquel<\/strong><\/p>\r\n\r\n

        Se han realizado experimentos con cebada, papa y habas y se obtuvieron incrementos en rendimiento gracias a la aplicación foliar de Ni.<\/p>\r\n\r\n

        \r\n
         <\/div>\r\n\r\n
        \"\r\n\r\n\t\r\n\t\t\r\n\t\t\t
        \r\n\t\t\t

        Figura 2. Influencia de aplicaciones foliares de Ni en brotes de árboles deficientes de Ni. La planta de la derecha deficiente en Ni, mientras que la de la izquierda ha sido tratada con una aplicación foliar de Ni. <\/strong><\/span><\/p>\r\n\r\n\t\t\t

        (Wood y Reilly, 2004).<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n\r\n

        Algunas plantas, como el nogal pecanero, necesitan especialmente el níquel, ya que sin una cantidad suficiente, la enzima que convierte la urea en amoniaco no actúa, por lo que la urea puede acumularse hasta alcanzar una concentración nociva para el árbol. En los nogales pecaneros, la carencia de níquel puede producir deformaciones físicas, un rendimiento más bajo, caída prematura del fruto, fotosíntesis reducida, una mayor susceptibilidad a la sarna y menor supervivencia.<\/em><\/strong><\/p>\r\n\r\n

        \r\n
         <\/div>\r\n\r\n
        \"\r\n\r\n\t\r\n\t\t\r\n\t\t\t
        \r\n\t\t\t

        Figura 3. Influencia de la aplicación foliar de níquel. La rama en el lado izquierdo del árbol fue tratada con Ni poco después de la brotación, mientras que la parte derecha de los árboles no fue tratada. <\/strong><\/span><\/p>\r\n\r\n\t\t\t

        (Wood y Reilly, 2004).<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n\r\n

        La deficiencia de níquel en leguminosas y en otras dicotiledóneas ocasiona una disminución en la actividad de la enzima ureasa, condición que provoca la acumulación de niveles tóxicos de urea y se manifiesta como una necrosis en la punta de las hojas. En soya, niveles bajos de Ni en el suelo pueden disminuir la nodulación y el rendimiento en semilla, fenómeno que se explica por la participación del Ni en la enzima hidrogenasa de las bacterias nitrificantes.<\/p>\r\n\r\n

        Fuente:<\/strong><\/p>\r\n\r\n

          \r\n\t
        • Kutman, B.Y., Kutman, U.B. and Cakmak, I. 2014.  Effects of seed nickel reserves or externally supplied nickel on the growth, nitrogen metabolites and nitrogen use efficiency of urea- or nitrate-fed soybean. Plant and Soil 376:261-276.<\/li>\r\n\t
        • Malavolta, E., and M. F. Moraes. 2007. Nickel- from toxic to essential nutrient. Better Crops with Plant Food 91(3): 26-27.<\/li>\r\n\t
        • Wood, B.W., Reilly, C.C., and Nyczepir, A.P. Nyczepir. 2004. Mouse-ear of Pecan: a Nickel Deficiency. Hortscience 36(6): 1238-1242.<\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/div>\r\n","has_cost":0,"creation":"2015-06-10 19:53:39","updated":"2019-04-21 23:44:24","published":"2015-06-10 20:28:06","cost":0,"badge":"mxn"},"\/articulos\/nutricion-vegetal"]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/Handlers\/Strategies\/RequestResponse.php","line":38,"function":"{closure}","args":[{},{},{"category":"nutricion-vegetal","article":"niquel-esencial-para-la-absorcion-del-nitrogeno","section":"comprar"}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/Routing\/Route.php","line":358,"function":"__invoke","class":"Slim\\Handlers\\Strategies\\RequestResponse","type":"->","args":[{},{},{},{"category":"nutricion-vegetal","article":"niquel-esencial-para-la-absorcion-del-nitrogeno","section":"comprar"}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php","line":65,"function":"handle","class":"Slim\\Routing\\Route","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php","line":65,"function":"handle","class":"Slim\\MiddlewareDispatcher","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/Routing\/Route.php","line":315,"function":"handle","class":"Slim\\MiddlewareDispatcher","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/Routing\/RouteRunner.php","line":68,"function":"run","class":"Slim\\Routing\\Route","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/twig-view\/src\/TwigMiddleware.php","line":115,"function":"handle","class":"Slim\\Routing\\RouteRunner","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php","line":121,"function":"process","class":"Slim\\Views\\TwigMiddleware","type":"->","args":[{},{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/Middleware\/RoutingMiddleware.php","line":45,"function":"handle","class":"Psr\\Http\\Server\\RequestHandlerInterface@anonymous\u0000\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php:108$10","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php","line":121,"function":"process","class":"Slim\\Middleware\\RoutingMiddleware","type":"->","args":[{},{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/Middleware\/ErrorMiddleware.php","line":76,"function":"handle","class":"Psr\\Http\\Server\\RequestHandlerInterface@anonymous\u0000\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php:108$10","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php","line":121,"function":"process","class":"Slim\\Middleware\\ErrorMiddleware","type":"->","args":[{},{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php","line":65,"function":"handle","class":"Psr\\Http\\Server\\RequestHandlerInterface@anonymous\u0000\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/MiddlewareDispatcher.php:108$10","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/App.php","line":199,"function":"handle","class":"Slim\\MiddlewareDispatcher","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/vendor\/slim\/slim\/Slim\/App.php","line":183,"function":"handle","class":"Slim\\App","type":"->","args":[{}]},{"file":"\/home\/intagri\/public_html\/index.php","line":261,"function":"run","class":"Slim\\App","type":"->","args":[]}]}