Extraction and study of enzymes linked to malate metabolism in tree leaves

Gérant, Dominique; Citerne, A.; Fabert, C.; Dizengremel, Pierre

doi:10.1051/forest:198905art0178

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The magnitude of the changes in enzyme activities was more marked for autumnal treatments than for winter treatments. (Dizengremel and Citerne, 1989;Koziol et al, 1988).…”

Section: Enzyme Activities In Leavesmentioning

confidence: 99%

“…Previous studies demonstrated that glyphosate applied during the dormant period did not affect poplar growth (Netzer and Hauser, 1983 (Heber et al, 1963). Fumarase (Hatch, 1978) and NAD-malic (NAD-ME) (Grover et al, 1981;Gerant et al, 1989) were used as mitochondrial markers. A pentose phosphate pathway enzyme (G-6-PDH or glucose-6-phosphate dehydrogenase) was also measured (Pitel and Cheliak, 1986).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of the period of glyphosate treatment on oak seedlings: phenological and physiotogical aspects

Fabert¹,

Frochot²,

Dizengremel³

1989

Ann. For. Sci.

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“…The magnitude of the changes in enzyme activities was more marked for autumnal treatments than for winter treatments. (Dizengremel and Citerne, 1989;Koziol et al, 1988).…”

Section: Enzyme Activities In Leavesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of the period of glyphosate treatment on oak seedlings: phenological and physiotogical aspects

Fabert¹,

Frochot²,

Dizengremel³

1989

Ann. For. Sci.

Self Cite

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Physiological and Biochemical Effects of Air Pollutants on Southern Pines

Sasek¹,

Flagler²

1996

Ecological Studies

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Changes in enzyme activities involved in malate metabolism in oak leaves during rhythmic growth

Marchetti¹,

Parmentier²,

Chemardin³

et al. 1995

Trees

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Abstract. Amide content, ATP level and activities of enzymes linked to malate metabolism were determined in leaves of three successive flushes of common oak during the development of the third flush. In the expanding leaves, all studied enzymes showed a maximum activity around the 7th day after budbreak. Phosphoenolpyruvate carboxylase (PEPc), NAD-malate dehydrogenase (MDH) and NADPmalic enzyme (ME) maintained high activity up to full leaf expansion. In contrast, fumarase (FUM), pyruvate kinase (PK) and NADP-MDH activities sharply decreased to reach, on the 10th day after budbreak, the same low activity levels as those measured in mature leaves. Two patterns were observed in oak leaves during growth. Firstly (7th-10th day after budbreak), PK, FUM and NADP-MDH could contribute to the supply of ATP through glycolysis and Krebs cycle; the ATP profile corroborated those results. Secondly (after the 10th day), the maintenance of an active PEPc pathway led to a respiratory CO2 refixation and provided carbon skeletons for amino acid synthesis. Furthermore, nitrate reductase (NR) activity was high in young oak leaves. Slight changes in activities of NR as well as NAD(P)-ME, NAD(P)-MDH can be noted on days 7 and I0 after budbreak in the mature leaves. These changes could be necessary in supplying the third flush with amino acids. These data suggest that MDH, ME, PK and PEPc have important functions in the young leaves which are not directly linked to C3 photosynthesis but rather to nitrate assimilation and malate provision to mitochondria.

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Extraction and study of enzymes linked to malate metabolism in tree leaves

Cited by 4 publications

References 6 publications

Effects of the period of glyphosate treatment on oak seedlings: phenological and physiotogical aspects

Effects of the period of glyphosate treatment on oak seedlings: phenological and physiotogical aspects

Physiological and Biochemical Effects of Air Pollutants on Southern Pines

Changes in enzyme activities involved in malate metabolism in oak leaves during rhythmic growth

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