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Cytochrome P450 CYP89A9 Is Involved in the Formation of Major Chlorophyll Catabolites during Leaf Senescence in Arabidopsis[W][OA]
This work identifies dioxobilin-type catabolites to represent more than 90% of the chlorophyll breakdown products in Arabidopsis. Their formation from formyloxobilin-type precursors is catalyzed byExpand
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The Acidic A-Domain of Arabidopsis Toc159 Occurs as a Hyperphosphorylated Protein1[W][OA]
The translocon at the outer membrane of the chloroplast assists the import of a large class of preproteins with amino-terminal transit sequences. The preprotein receptors Toc159 and Toc33 inExpand
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MES16, a Member of the Methylesterase Protein Family, Specifically Demethylates Fluorescent Chlorophyll Catabolites during Chlorophyll Breakdown in Arabidopsis12[W][OA]
During leaf senescence, chlorophyll (Chl) is broken down to nonfluorescent chlorophyll catabolites (NCCs). These arise from intermediary fluorescent chlorophyll catabolites (FCCs) by anExpand
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Mechanism and Significance of Chlorophyll Breakdown
Chlorophyll breakdown is the most obvious sign of leaf senescence and fruit ripening. A multistep pathway has been elucidated in recent years that can be divided into two major parts. In the firstExpand
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A Role for TIC55 as a Hydroxylase of Phyllobilins, the Products of Chlorophyll Breakdown during Plant Senescence[OPEN]
TIC55, a Rieske-type oxygenase previously described as a component of the chloroplast protein import machinery, also functions as a chlorophyll catabolite hydroxylase. Chlorophyll degradation is theExpand
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Different Mechanisms Are Responsible for Chlorophyll Dephytylation during Fruit Ripening and Leaf Senescence in Tomato1[W][OPEN]
Phytol hydrolysis during chlorophyll breakdown in tomato leaves is specifically catalyzed by pheophytinase, while during fruit ripening other, so far unknown, hydrolases are active. ChlorophyllExpand
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Non-specific activities of the major herbicide-resistance gene BAR
Bialaphos resistance (BAR) and phosphinothricin acetyltransferase (PAT) genes, which convey resistance to the broad-spectrum herbicide phosphinothricin (also known as glufosinate) via N-acetylation,Expand
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Accelerated cell death 2 suppresses mitochondrial oxidative bursts and modulates cell death in Arabidopsis.
The Arabidopsis ACCELERATED CELL DEATH 2 (ACD2) protein protects cells from programmed cell death (PCD) caused by endogenous porphyrin-related molecules like red chlorophyll catabolite or exogenousExpand
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Hydroxymethylated Phyllobilins: A Puzzling New Feature of the Dioxobilin Branch of Chlorophyll Breakdown
Colorless nonfluorescent chlorophyll (Chl) catabolites (NCCs) are formyloxobilin-type phyllobilins, which are considered the typical products of Chl breakdown in senescent leaves. However, inExpand
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Water deficit induces chlorophyll degradation via the 'PAO/phyllobilin' pathway in leaves of homoio- (Craterostigma pumilum) and poikilochlorophyllous (Xerophyta viscosa) resurrection plants.
Angiosperm resurrection plants exhibit poikilo- or homoiochlorophylly as a response to water deficit. Both strategies are generally considered as effective mechanisms to reduce oxidative stressExpand
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