Soil Manganese in Relation to Plant Growth

Mulder, E. G.; Gerretsen, F. C.

doi:10.1016/s0065-2113(08)60310-7

Cited by 78 publications

(34 citation statements)

References 126 publications

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“…Higher concentrations of nitrate in Mn-deficient plants could be due to a role of Mn in nitrate reduction and perhaps the activity of nitrate reductase (88). Heenan and Campbell (48) examined this proposal and found that although the activity of nitrate reductase in vivo was lower in deficient plants, the amount of enzyme was little affected.…”

Section: Nitrogen Metabolism and Nodulationmentioning

confidence: 99%

Physiological Functions of Manganese in Plants

Campbell¹,

Nable²

1988

Manganese in Soils and Plants

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This review aims to relate some aspects of plant growth to the physiological functions of Mn within the plant. Yields of crops, pastures and trees are affected adversely by either deficiencies or excesses (toxicities) of Mn. Concomitantly, symptoms of the disorder usually but not always appear on leaves, roots or fruits. It is these extremes of Mn nutrition that have been largely responsible for elucidating its physiology.The physiology of Mn in plants is governed by the chemistry of Mn, particularly the configuration of the electrons in the d shell (Chapter 1). When Mn is in the Mn(Il) oxidation state there is one unpaired electron in each of the five d orbitals i.e. the stable, energetically favoured d 5 configuration is attained. Two consequences of this configuration are (i) Mn is a relatively weak ligand and (ii) Mn has the potential to form compounds in several oxidation states. These factors have contributed to the difficulties in unraveling the physiology of Mn: many functions have been derived by inference, but recent biochemical advances (Chapter 9) tend to substantiate these functions.Manganese has a profound influence on three particular physiological (metabolic) functions: (i) photosynthesis, particularly electron transport in photo system II, photodestruction of chlorophyll and chloroplast structure, (ii) N metabolism especially the sequential reduction of nitrate, and (iii) aromatic ring compounds as precursors for aromatic amino acids, hormones (auxins), phenols and lignins. Growth physiology of Mn 2

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Section: Nitrogen Metabolism and Nodulationmentioning

confidence: 99%

Physiological Functions of Manganese in Plants

Campbell¹,

Nable²

1988

Manganese in Soils and Plants

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“…Although the residual value of Mn applied to plants grown in potted neutral and alkaline soils can be appreciable (64,65,66), it is acknowledged widely that the residual value of previously applied Mn to succeedingjield crops on these soils is negligible or at best very limited (8,55,97). This conclusion is based on the rapid reversion of manganous salts to less available manganic forms which may fail to correct acute Mn deficiency even in the year of application (Table 2).…”

Section: Residual Valuementioning

confidence: 99%

Occurrence and Correction of Manganese Deficiency in Plants

Reuter¹,

Alston²,

McFarlane³

1988

Manganese in Soils and Plants

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“…A ce stade, la boue a donc retenu 92 % de la quantité de manganèse. Le problème posé est celui des échanges du manganèse entre l'eau et le sédiment [18]. La baisse importante de l'activité de l'eau est un phénomène général observé pour le manganèse d'autant plus que les particules en suspension, même en très faible quantité, en captent immédiatement une fraction.…”

Section: 2 Contamination Par La Boue (Bas N° 4) A) Evolution unclassified

L’utilisation d’une mousse terrestre (Grimmia orbicularis Bruch) comme indicateur de la présence de manganèse 54, de cæsium 137 et de strontium 90

Hébrard¹,

Foulquier²,

Grauby³

1972

Radioprotection

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RÉSUMÉDes mousses terrestres (Grimmia orbicularis Bruch) sont contaminées expéri mentalement avec du manganèse 54, du caesium 137 et du strontium 90. Pour chaque radionucléide, on étudie simultanément la capacité de fixation de la plante à partir de l'eau et du sol. Les auteurs cherchent par ailleurs à déterminer le rôle joué par les variations hygrométriques sur la cinétique et l'intensité de la contamination. -Pour le manganèse 54, le facteur de concentration est de l'ordre de 700. La fixation est importante à partir de l'eau; à partir du sol, elle est liée à la teneur en manganèse échangeable. -Pour le caesium 137, le facteur de concentration est compris entre 90 et 180. Les échanges ne s'effectuent qu'entre l'eau et la plante.-Pour le strontium 90, le facteur de concentration varie de 100 à 500. Même si l'intensité des échanges est maximale entre l'eau et la plante, une possibilité de contamination secondaire à partir du sol n'en existe pas moins réellement. L'alternance de phases d'assèchement et de réhydratation du milieu influe peu sur le taux de fixation des radionucléides, car les mousses semblent bien les retenir très fortement. Les mousses terrestres, comme les mousses aquatiques, répondent de manière correcte aux exigences du contrôle sanitaire; elles peuvent être choisies comme indicatrices de pollution radioactive. ABSTRACTGround moss (Grimmia orbicularis Bruch) was experimentally contaminated with manganese 54, caesium 137 and strontium 90. For each radioisotope, the plant's fixation capacity from water and soil was studied simultaneously. Beside, the part * C

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Soil Manganese in Relation to Plant Growth

Cited by 78 publications

References 126 publications

Physiological Functions of Manganese in Plants

Physiological Functions of Manganese in Plants

Occurrence and Correction of Manganese Deficiency in Plants

L’utilisation d’une mousse terrestre (Grimmia orbicularis Bruch) comme indicateur de la présence de manganèse 54, de cæsium 137 et de strontium 90

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