NDLI: Reactive oxygen species and antioxidant levels as the factors of autumn senescence in phenological forms of beech (Fagus sylvatica L.)

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Reactive oxygen species and antioxidant levels as the factors of autumn senescence in phenological forms of beech (Fagus sylvatica L.)

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Reactive oxygen species and antioxidant levels as the factors of autumn senescence in phenological forms of beech (Fagus sylvatica L.)

Content Provider	Springer Nature Link
Author	Kraj, Wojciech
Copyright Year	2016
Abstract	This study examines changes in the reactive oxygen species (ROS) content and in the level and degree of ascorbate and glutathione oxidation during leaf senescence in phenological forms of beech (Fagus sylvatica L.). Leaves were collected between August and October in 2009 and 2012. Chlorophyll degradation depended significantly on the phenological characteristics of the specimens. Chlorophyll, proteins, superoxide ion and hydrogen peroxide contents and lipid peroxidation dynamics exhibited greater dependence on temperature changes in the early form than in the late form. In the early stage of senescence, the late beech form presented a greater increase in ascorbate and glutathione synthesis than did the early form (ascorbate and glutathione synthesis was the main characteristic of the phenological forms’ defence mechanism against increasing ROS concentration). The early form was characterized by a stronger correlation between increasing ROS and the concentrations of oxidized forms of ascorbate and glutathione. We conclude that the earlier onset and greater rate of autumn senescence in the early phenological form relative to the late form were associated with significantly quicker chlorophyll degradation and greater production of ROS, which was better balanced by the antioxidant system in the late phenological form. The different concentrations of ascorbate and glutathione and the degree of their oxidation influenced the oxidative stress tolerance in the senescing leaves of the different phenological forms of beech.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	38
Issue Number	2
e-ISSN	18611664
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-01-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fagus sylvatica L. Phenology Reactive oxygen species Antioxidants Leaf senescence Plant Physiology Plant Genetics & Genomics Plant Biochemistry Plant Pathology Plant Anatomy/Development Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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