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Early stage de-etiolation increases the ferulic acid content in winter triticale seedlings under full sunlight conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
29995 44451 2010 7 PDF Available
Title
Early stage de-etiolation increases the ferulic acid content in winter triticale seedlings under full sunlight conditions
Abstract

In the presented work an attempt has been made to estimate the phenolics content and its implication for the protection of the photosynthetic apparatus in course of a plant’s de-etiolation. The experiments were carried out on two genotypes of winter triticale varying in their resistance to drought. The activity of the photosynthetic apparatus was monitored by taking measurements of chlorophyll fluorescence and chlorophyll/carotenoids content. Analyses of the total pool of phenolic compounds and ferulic acid as well as l-phenylalanine ammonia lyase activity were completed.The first illuminations of etiolated seedlings induced a chlorophyll synthesis, which was followed by the increasing activity of the photosynthetic apparatus in both studied genotypes. Piano exhibited a higher values of the maximum quantum efficiency of photosystem II primary photochemistry during de-etiolation than Imperial. These results may just indicate that for Imperial, the delivery of photons to the reaction centres exceeded the capacity of the photosynthetic apparatus to transduce this energy via electron transport. An increase in the content of ferulic acid was more noticeable for Piano and seems to be a consequence of adaptation to the new light conditions. It should be taken into account, that an increase of ferulic acid content during early stage of de-etiolation, may limit the photoinhibition of photosynthesis whenever radiation is excessive for the photosynthetic apparatus.

Keywords
Ferulic acid; De-etiolation; Phenolics; Chlorophyll fluorescence; Photosynthetic apparatus; Winter triticale
First Page Preview
Early stage de-etiolation increases the ferulic acid content in winter triticale seedlings under full sunlight conditions
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 101, Issue 3, 2 December 2010, Pages 279–285
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering