The Biochemistry of Manganese in Plants

Burnell, James N.

doi:10.1007/978-94-009-2817-6_10

Cited by 179 publications

(128 citation statements)

References 95 publications

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“…Our results rather suggest that the release of phenolic compounds into the apoplast reflects an advanced stress response to excess Mn rather than a tolerance mechanism. The stimulating effect of Mn on Phe ammonia lyase activity (Engelsma, 1972;Burnell, 1988) and on phenol contents in the plant tissue (Langheinrich et al, 1992) support the hypothesis that Mn excess induces the release of phenolic compounds into the leaf apoplast .…”

Section: Effect Of Mn Treatment On Phenol Concentration and Compositisupporting

confidence: 55%

The Role of Hydrogen Peroxide-Producing and Hydrogen Peroxide-Consuming Peroxidases in the Leaf Apoplast of Cowpea in Manganese Tolerance

et al. 2006

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The apoplast is considered the leaf compartment decisive for manganese (Mn) toxicity and tolerance in cowpea (Vigna unguiculata). Particularly apoplastic peroxidases (PODs) were proposed to be key enzymes in Mn toxicity-induced processes. The presented work focuses on the characterization of the role of hydrogen peroxide (H 2 O 2 )-producing (NADH peroxidase) and H 2 O 2 -consuming peroxidase (guaiacol POD) in the apoplastic washing fluid (AWF) of leaves for early stages of Mn toxicity and genotypic differences in Mn tolerance of cowpea. Leaf AWF of the Mn-sensitive cultivar (cv) TVu 91 but not of the Mntolerant cv 1987 showed an increase of guaiacol-POD and NADH-peroxidase activities at elevated AWF Mn concentrations. two-dimensional resolutions of AWF proteins revealed that cv TVu 91 expressed more and additional proteins at high Mn treatment, whereas Mn-tolerant cv TVu 1987 remained nearly unaffected. In both cultivars, NADH-peroxidase activity and accompanied H 2 O 2 formation rate in vitro were significantly affected by Mn 21 , p-coumaric acid, and metabolites occurring in the AWF. The total phenol concentration in the AWF was indicative of advanced stages of Mn toxicity but was rather unrelated to early stages of Mn toxicity and genotypic differences in Mn tolerance. The NADH oxidation by AWF PODs was significantly delayed or enhanced in the presence of the protein-free AWF from cv TVu 1987 or cv TVu 91, respectively. High-performance liquid chromatography analysis of AWF indicates the presence of phenols in cv TVu 1987 not observed in cv TVu 91. We conclude from our studies that the H 2 O 2 -producing NADH peroxidase and its modulation by stimulating or inhibiting phenolic compounds in the leaf apoplast play a major role for Mn toxicity and Mn tolerance in cowpea.

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Section: Effect Of Mn Treatment On Phenol Concentration and Compositisupporting

confidence: 55%

The Role of Hydrogen Peroxide-Producing and Hydrogen Peroxide-Consuming Peroxidases in the Leaf Apoplast of Cowpea in Manganese Tolerance

et al. 2006

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“…The enhancement of plant resistance indirectly through root exudates to modify the root environment, or the modification of important metabolic constituents required for pathogenic activity is also reported (Thompson and Huber, 2007). By activating important biochemical reactions in plant defence, such as the production of phenylalanine ammonia lyase, the first enzyme committed in the phenylpropanoid pathway, Mn increases the deposition of recalcitrant lignin to slow down fungal invasion (Burnell, 1988). The formation of lignitubers was found to halt the development of take-all of wheat caused by Gaeumannomyces graminis var.…”

Section: Percentage Of Infected Bulb Tissues and Disease Severity Indmentioning

confidence: 99%

EFFECT OF MICRONUTRIENTS-ENRICHED FERTILIZERS ON BASAL STEM ROT DISEASE INCIDENCE AND SEVERITY ON OIL PALM (<i>ELAEIS GUINEENSIS</i> JACQ.) SEEDLINGS

Hanafi¹,

Idris²,

Kadir³

et al. 2014

American Journal of Applied Sciences

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“…Em situação de deficiência, pode inibir a síntese de lipídeos ou metabólitos secundários, como o ácido giberélico e os isoprenóides. O Mn participa como catalizador em atividades enzimáticas como: malato desidrogenase, fosfatase ácida, superóxido desmutase, entre outras (Burnell, 1988).…”

Section: Introductionunclassified

Efeito da aplicação de manganês no rendimento e na qualidade de sementes de soja

Mann

Resende²,

Silva-Mann

et al. 2002

Pesq. agropec. bras.

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Resumo -O desequilíbrio nutricional, principalmente dos micronutrientes, tem sido um dos fatores para perdas na produção de sementes. Esses nutrientes desempenham papel em rotas bioquímicas que garantem a formação de lipídeos, proteínas e ainda contribuem na estruturação das membranas celulares. O objetivo deste trabalho foi avaliar a influência da aplicação de Mn na folha e no solo, sobre o rendimento e a qualidade de sementes de soja, cultivares Conquista e Garimpo. A qualidade das sementes foi avaliada por meio de testes de germinação, envelhecimento artificial, condutividade elétrica, índice de velocidade de emergência e pela determinação dos teores de proteína e óleo. Verificaram-se aumentos na produtividade, na germinação, no vigor e nos teores de proteína e óleo das sementes e no teor de Mn na planta, nas duas formas de aplicação do Mn, com maior grau de eficiência da aplicação na folha.Termos para indexação: Glycine max, aplicação foliar, vigor da semente, solo, produtividade. Effect of manganese application on yield and seed quality of soybeanAbstract -The nutritional unbalance, mainly with micronutrients, has contributed for losses in seeds yields. These nutrients are carrying out in biochemistry paths responsible for metabolism of lipids, proteins, and structure in cells membranes. The objective of this work was to evaluate the influence of Mn application (leaf or soil) on yield and seed quality of two soybean cultivars, Garimpo and Conquista. Seed quality was assessed through germination test, accelerated ageing, electrical conductivity, emergence speed, protein and oil content. The application of Mn in the soil or sprayed on the leaves increased its content in plant tissue, improved seed quality by increasing its protein and oil content as well as its germination and vigor. The Mn sprayed on the leaves was more efficient than when this nutrient was applied in the soil.

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The Biochemistry of Manganese in Plants

Cited by 179 publications

References 95 publications

The Role of Hydrogen Peroxide-Producing and Hydrogen Peroxide-Consuming Peroxidases in the Leaf Apoplast of Cowpea in Manganese Tolerance

The Role of Hydrogen Peroxide-Producing and Hydrogen Peroxide-Consuming Peroxidases in the Leaf Apoplast of Cowpea in Manganese Tolerance

EFFECT OF MICRONUTRIENTS-ENRICHED FERTILIZERS ON BASAL STEM ROT DISEASE INCIDENCE AND SEVERITY ON OIL PALM (<i>ELAEIS GUINEENSIS</i> JACQ.) SEEDLINGS

Efeito da aplicação de manganês no rendimento e na qualidade de sementes de soja

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