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. 1979 Feb;63(2):318–323. doi: 10.1104/pp.63.2.318

Pyrophosphatase, Peroxidase and Polyphenoloxidase Activities during Leaf Development and Senescence 1

Hemanta K Patra a, Dinabandhu Mishra a
PMCID: PMC542822  PMID: 16660721

Abstract

Inorganic pyrophosphatase, peroxidase, and polyphenoloxidase activities were studied as the function of leaf insertion level in eight monocotyledonous and eight dicotyledonous species. Alkaline inorganic pyrophosphatase shows a declining activity toward the end of senescence whereas no regular drift in either peroxidase or polyphenoloxidase activities was noticed during senescence of attached leaves. In the primary leaves of rice, peroxidase and polyphenoloxidase activities were high in the senescent leaves and there exists a correlation between chlorophyll content and peroxidase activity though not with polyphenoloxidase activity. Upon detachment leaves exhibit increasing peroxidase and polyphenoloxidase activities with time. The distribution of the enzyme activities during senescence of attached leaves is suggested to be species-specific, and an increase in peroxidase and polyphenoloxidase activities cannot be taken as an indicator of leaf senescence.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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