Ascorbate and glutathione metabolism during development and desiccation of orthodox and recalcitrant seeds of the genus Acer

Functional Plant Biology : FPB
Stanisława Pukacka, Ewelina Ratajczak

Abstract

The ascorbate-glutathione system was studied during development and desiccation of seeds of two Acer species differing in desiccation tolerance: Norway maple (Acer platanoides L., orthodox) and sycamore (Acer pseudoplatanus L., recalcitrant). The results showed remarkable differences in the concentration and redox balance of ascorbate and glutathione between these two kinds of seeds during development, and a significant dependence between glutathione content and acquisition of desiccation tolerance in Norway maple seeds. There were relatively small differences between the species in the activities of enzymes of the ascorbate-glutathione cycle: ascorbate peroxidase (APX, EC 1.11.1.11), monodehydroascorbate reductase (MR, EC 1.6.5.4), dehydroascorbate reductase (DHAR, EC 1.8.5.1), and glutathione reductase (GR, EC 1.6.4.2). At the end of seed maturation, ascorbic acid content and the activities of the above enzymes was about the same in both species The electrophoretic pattern of APX isoenzymes was also similar for both species, and the intensity of the bands decreased at the end of seed maturation in both species. When sycamore seeds were desiccated to a moisture content of less than 26%, there was a marked decrease in seed viab...Continue Reading

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Citations

Sep 22, 2010·The New Phytologist·Ilse KrannerCharlotte E Seal
Jan 1, 2019·Functional Plant Biology : FPB·Aleksandra M StaszakTomasz A Pawlowski
Jun 19, 2014·International Journal of Molecular Sciences·Aleksandra Maria Staszak, Tomasz Andrzej Pawłowski
Mar 23, 2010·Plant Molecular Biology·Tomasz Andrzej Pawłowski
Dec 19, 2019·Antioxidants·Karolina BilskaEwa Marzena Kalemba
Apr 9, 2020·Plant & Cell Physiology·Shirin AlipourEwa Marzena Kalemba

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