The effect of nitrate nutrition on iron chlorosis and leaf growth in sunflower (Helianthus annuus L.)

Kosegarten, Harald; Wilson, G.; Esch, Andreas

doi:10.1016/s1161-0301(98)00021-5

Cited by 51 publications

(28 citation statements)

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“…In contrast to our findings, Kosegarten et al (1998aKosegarten et al ( , 1998b found that at a low-nutrient solution pH (from 4.0-5.0), controlled by a pH-stat device, NO 3 Ϫ -fed sunflower plants had a significantly lower chlorophyll concentration or even reduced leaf growth Zou et al (2001), respectively, reported a significantly higher root Fe concentration in chlorotic sunflower and maize plants grown in nutrient solutions supplied with NO 3 Ϫ as compared with green, NH 4 ϩ -, or NH 4 NO 3 -fed plants. In both these studies, Fe concentration may have been overestimated as a consequence of Fe precipitation because of low chelate stability of FeEDTA above pH 6.5 (Strasser et al, 1999).…”

Section: Discussioncontrasting

confidence: 99%

“…Thus, the recently reported NO 3 Ϫ -induced Fe deficiency chlorosis in sunflower grown in the nutrient solution culture at low Fe supply (Kosegarten et al, 1998b(Kosegarten et al, , 1999(Kosegarten et al, , 2001) is an interesting physiological phenomenon but of little relevance to Fe deficiency in field grown plants. Nevertheless, even in this case, Fe chlorosis is mainly a consequence of lower uptake and shoot translocation of Fe by NO 3 Ϫ -fed plants as compared with plants grown in the nutrient solutions with NH 4 ϩ -N supply (Table II; Mengel and Geurtzen, 1986;Kosegarten et al, 1998b). Furthermore, the results from Kosegarten's experiments with the controlled pH of nutrient solutions do not differ in principal whatsoever from ours because the uptake of Fe by roots was influenced by pH rather than by N form.…”

Section: Table V Effects Of N Forms and Nutrient Solution Ph On Fe-bmentioning

confidence: 99%

“…In this study, we tested Mengel's hypothesis of Fe inactivation in leaves caused by NO 3 Ϫ nutrition using the same model plant, sunflower, as has commonly been used in many experiments performed by Mengel et al (Mengel et al, 1994;Hoffmann and Kosegarten, 1995;Kosegarten et al, 1998aKosegarten et al, , 1998bKosegarten et al, , 1999Kosegarten et al, , 2001. The objectives of the work presented here were: (a) to clarify the effect of NO 3 Ϫ supply to roots on postulated Fe inactivation in the leaf apoplast as a primary cause of NO 3 Ϫ -induced Fe deficiency chlorosis; (b) to investigate the influence of form of N supply and pH of nutrient solution stabilized by pH buffers on concentration of Fe in the two-leaf compartments, apoplast, and symplast; and c) to characterize the leaf apoplast for various binding forms of Fe.…”

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Nitrate Does Not Result in Iron Inactivation in the Apoplast of Sunflower Leaves

Nikolić

Römheld

2003

Plant Physiology

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It has been hypothesized that nitrate (NO 3 Ϫ ) nutrition might induce iron (Fe) deficiency chlorosis by inactivation of Fe in the leaf apoplast (H.U. Kosegarten, B. Hoffmann, K. Mengel [1999] Ϫ supply (up to 40 mm) did not affect the relative distribution of Fe between leaf apoplast and symplast at constant low external pH of the root medium. Although perfusion of high pH-buffered solution (7.0) into the leaf apoplast restricted 59 Fe uptake rate as compared with low apoplastic solution pH (5.0 and 6.0, respectively), loading of NO 3 Ϫ (6 mm) showed no effect on 59 Fe uptake by the symplast of leaf cells. However, high light intensity strongly increased 59 Fe uptake, independently of apoplastic pH or of the presence of NO 3 Ϫ in the apoplastic solution. Finally, there are no indications in the present study that NO 3 Ϫ supply to roots results in the postulated inactivation of Fe in the leaf apoplast. It is concluded that NO 3 Ϫ nutrition results in Fe deficiency chlorosis exclusively by inhibited Fe acquisition by roots due to high pH at the root surface.When grown on highly calcareous soils, most plant species of the so called Strategy I type (Marschner and Rö mheld, 1994) respond to lack of iron (Fe) by developing characteristic symptoms of Fe deficiency chlorosis, primarily in young leaves. The concentration of Fe expressed on a dry weight leaf basis and the amount of Fe per leaf frequently decreases in chlorotic leaves, although the Fe concentration can sometimes be the same or even higher in chlorotic leaves as compared with green ones, as has been reported in field-grown woody plants ("the chlorosis paradox"; Morales et al., 1998;Rö mheld, 2000;Nikolic and Rö mheld, 2002). Various soil factors (e.g. CO 2 , ethylene, low temperature, high water content, and drought) resulting in severe inhibition of root growth might be responsible for triggering a restriction in leaf expansion growth, which in turn elevates the Fe concentration in these chlorotic leaves as a consequence of the diminished dilution of Fe concentration (Rö mheld, 2000, and refs. therein). This explanation would appear to account for the phenomenon of the "chlorosis paradox" that occurs occasionally under field conditions and is always associated with restricted leaf expansion growth. On the other hand, as has been hypothesized by Mengel and coworkers for many years, the higher Fe concentrations in the leaves of chlorotic plants could be caused by an increase in the pH of leaf apoplast induced by bicarbonate (HCO 3 Ϫ ) or nitrate (NO 3 Ϫ ) or both of these ions in the soil solution of calcareous soils (Mengel, 1994). These authors argue that because a high leaf apoplastic pH depresses the activity of Fe III reductase, less Fe 2ϩ can be transported across the plasma membrane into the leaf symplast, resulting in Fe deficiency chlorosis (Kosegarten et al., 2001). Despite this explanation, however, chlorotic plants with higher concentrations of Fe in younger leaves have never been found so far in nutrient solutions under controlled environmental...

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Section: Discussioncontrasting

confidence: 99%

Section: Table V Effects Of N Forms and Nutrient Solution Ph On Fe-bmentioning

confidence: 99%

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Nitrate Does Not Result in Iron Inactivation in the Apoplast of Sunflower Leaves

Nikolić

Römheld

2003

Plant Physiology

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“…En ésta región prevalece un clima desértico cálido, extremoso y régimen de lluvias to the disease by the plant, mainly highlighting the iron content (González, 1996;Quintero, 2002;Liu et al, 2007). In addition, there is evidence that leaf iron application masks typical symptoms of chlorosis in viral diseases in habanero (Lozada-Cervantes et al, 2005), although such symptoms may be associated with nutrition and absorption of nitrates by the plant (Kosegarten et al, 1998;Dordas, 2008).…”

Section: Materiales Y Métodosmentioning

confidence: 99%

“…En el caso particular del TSWV se ha encontrado cierta relación entre el contenido de microelementos y la tolerancia a la enfermedad por la planta, destacando principalmente el contenido de hierro (González, 1996;Quintero, 2002;Liu et al, 2007). Además, se tiene evidencia de que la aplicación foliar de hierro logra enmascarar algunos síntomas típicos de clorosis en enfermedades virales en habanero (LozadaCervantes et al, 2005), aunque dichos síntomas pudieran estar asociados a la nutrición y absorción de nitratos por la planta (Kosegarten et al, 1998;Dordas, 2008).…”

Section: Introductionunclassified

Hierro foliar y acolchado plástico en Capsicum chinense Jacq. infectado con tospovirus

Bojórquez

Maza

Contreras

et al. 2017

Remexca

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ResumenDe las enfermedades que afectan mayormente al chile habanero se encuentran las provocadas por tospovirus, los cuales pueden reducir completamente su rendimiento. Durante el año 2013, se realizó un experimento con dos variedades de chile habanero (una infectada y otra no infectada con tospovirus), con el objetivo de evaluar la aplicación de hierro en forma foliar y el acolchado plástico sobre el rendimiento, índice SPAD y NO3 -en el extracto celular del peciolo (ECP). Los tratamientos se distribuyeron bajo un diseño factorial 2 * 2 * 4 (dos variedades, una infectada con tospovirus y otra sana; con o sin aplicación de hierro foliar, y cuatro colores de acolchado plástico). Los resultados obtenidos mostraron que la infección de la variedad y la aplicación de hierro foliar no afectaron el rendimiento (p˃ 0.05); sin embargo, el color de acolchado plástico si lo modificó significativamente (p< 0.05), incrementándose al utilizar el acolchado trasparente y plateado. El índice SPAD en las hojas fue afectado significativamente (p< 0.05) al inicio del experimento por los tratamientos variedades y aplicación de hierro foliar, mientras que a los 90 días después del trasplante fue afectado por el acolchado, las AbstractOf the diseases that affect mainly the habanero pepper are those caused by tospoviruses, which can completely reduce its yield. During the year 2013, an experiment was carried out with two varieties of habanero pepper (one infected and one not infected with tospoviruses), with the objective of evaluating the application of iron in foliar form and the plastic padding on the performance, index SPAD and NO3 -in the petiole cell extract (ECP). The treatments were distributed under a factorial design 2 * 2 * 4 (two varieties, one infected with tospoviruses and another healthy, with or without application of foliar iron, and four colors of plastic mulch). The results showed that the infection of the variety and the application of foliar iron did not affect yield (p˃ 0.05); however, the color of plastic mulch is significantly modified (p< 0.05), increasing when using transparent and silver mulch. The SPAD index in the leaves was significantly affected (p< 0.05) at the beginning of the experiment by treatments varieties and application of foliar iron, whereas at 90 days after the transplant was affected by the quilting, varieties and application of iron (p< 0.005), as well as the interaction between padding and iron application (p< 370 et al. variedades y la aplicación de hierro (p< 0.005), igual que la interacción entre el acolchado y la aplicación de hierro (p< 0.02). Por otro lado, las concentraciones de NO3 -en el ECP resultaron afectadas durante la mayor parte del tiempo en el experimento. Las mayores concentraciones de NO3 -se presentaron en las plantas desarrolladas en acolchado plástico y en las que no recibieron aplicación de hierro foliar.Rev. Mex. Cienc. Agríc. Vol.8 Núm. 2 15 de febrero -31 de diciembre, 2017 Ariana Isabel Torres BojórquezPalabras clave: clorofila, chile habanero, enfermedades, ni...

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Importance of FeIII reduction in the apoplast for meristematic growth and chlorosis

Mengel¹,

Kosegarten

2001

Plant Nutrition

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The effect of nitrate nutrition on iron chlorosis and leaf growth in sunflower (Helianthus annuus L.)

Cited by 51 publications

References 31 publications

Nitrate Does Not Result in Iron Inactivation in the Apoplast of Sunflower Leaves

Nitrate Does Not Result in Iron Inactivation in the Apoplast of Sunflower Leaves

Hierro foliar y acolchado plástico en Capsicum chinense Jacq. infectado con tospovirus

Importance of FeIII reduction in the apoplast for meristematic growth and chlorosis

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