Title
Chlorophyll Catabolites in Senescent Leaves of the Plum Tree (Prunus domestica)
Author
Theresia Erhart, Cecilia Mittelberger, Clemens Vergeiner, Gerhard Scherzer, Barbara Holzner, Peter Robatscher, Michael Oberhuber, Bernhard Kräutler
Year
2016
Journal
Chemistry & Biodiversity
Abstract
In cold extracts of senescent leaves of the plum tree (Prunus domestica ssp. domestica) six colorless non-fluorescent chlorophyll catabolites (NCCs) were characterized, named Pd-NCCs. In addition, several minor NCC fractions were tentatively classified. The structure of the most polar one of the NCCs, named Pd-NCC-32, featured an unprecedented twofold glycosidation pattern. Three of the NCCs are also functionalized at their 32-position by a glucopyranosyl group. In addition, two of these glycosidated NCCs carry a dihydroxyethyl group at their 18-position. In the polar Pd-NCC-32 the latter group is further glycosidated at the terminal 182-position. Four other major Pd-NCCs and one minorPd-NCC were identified with known NCCs from higher plants, known to belong to the ‘epi’-series. In addition tentative structures were derived for two minor fractions, classified as yellow chlorophyll catabolites (YCCs), which represented (formal) oxidation products of two of the observed Pd-NCCs. The chlorophyll catabolites in leaves of plum feature the same basic structural pattern as those found in leaves of apple and pear trees.
Instrument
J-715
Keywords
Circular dichroism, Stereochemistry, Agricultural and environmental