Chlorophyll catabolism in Prunus serrulata autumnal leaves

Abstract

Chlorophyll catabolism in Prunus serrulata autumnal leaves was investigated. The amount of chlorophyll catabolites accumulated within the same plant species varies with the time of the leaf collection, seasonal climate and developmental stage of the plant. The chlorophyll catabolites found in P. serrulata autumnal leaves presented the tendency of the organism to decrease the level of photodynamically active chlorophyll before the programmed cell death. In the methanol extract several chlorophyll catabolites were identified. The results obtained by liquid - chromatography/mass spectrometry permitted the identification of the chlorophyll catabolites found in P. serrulata autumnal leaves. The analysis done revealed the chlorophyll catabolic pathway found in P. serrulata autumnal leaves

Cytochrome P450 CYP89A9 Is Involved in the Formation of Major Chlorophyll Catabolites during Leaf Senescence in Arabidopsis

“…Compared with NCCs, NDCCs miss the C5-carbon (Figure 1). In a few reports, NDCCs were observed as presumed chlorophyll degradation products (Losey and Engel, 2001;Djapic and Pavlovic, 2008;Djapic et al, 2009;Müller et al, 2011), but their means of formation remained unclear. Here, we show that Arabidopsis CYP89A9 specifically deformylates FCCs to the corresponding FDCCs and thus defines the biochemical basis for the generation of DCCs (i.e., FDCC and NDCC) (Figure 1).…”

“…It is tempting to speculate that CYP89 orthologs catalyze catabolite deformylation also in other plant species. Indeed, besides the Brassicales (Arabidopsis), CYP89 genes are present in several plant taxa (Nelson and Werck-Reichhart, 2011) containing species that were shown to produce NDCCs, such as Rosales (Norway maple; Müller et al, 2011) and Liliopsida (barley; Losey and Engel, 2001), but not Saxifragales (Parrotia persica; Djapic and Pavlovic, 2008). Within Arabidopsis, CYP89A9 is at the base of phylogeny of the seven-member CYP89 family (Bak et al, 2011), indicating that its recruitment for chlorophyll catabolism occurred rather early in evolution.…”

Impact of Elicitation by Methyl Jasmonate and Ethephon on Cotton (Gossypium Hirsutum L.) Protection Against Fusarium Oxysporum F. Sp. Vasinfectum

“…The application of SDN also resulted in an increase in chlorophyll content (a) and a decrease in chlorophyll content (b). Indeed, under the action of SDN, there would have been a bioconversion of chlorophyll (b) to chlorophyll (a), thus increasing the content of chlorophyll a and therefore a good photosynthetic activity (Folly, 2000, Djapic, 2012. As for carotenoid levels, they increase slightly, similarly to those of chlorophyll content b.…”