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Gorfer LM, Vestrucci L, Grigoletto V, Lazazzara V, Zanella A, Robatscher P, Scampicchio M, Oberhuber M. LC-Q-TOF-MS/MS data of phyllobilins in apple peels cv. 'Gala' during ripening under shelf-life conditions. Data Brief 2023; 48:109259. [PMID: 37383738 PMCID: PMC10294001 DOI: 10.1016/j.dib.2023.109259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 06/30/2023] Open
Abstract
During senescence and ripening, higher plants degrade the green pigment chlorophyll to linear tetrapyrrols, referred to as phyllobilins (PBs). This dataset provides chromatograms and mass spectral data of PBs acquired from methanolic extracts of cv. Gala apple peels at five different shelf life (SL) stages. Data were obtained using a (ultra-high) pressure liquid chromatograph (UHPLC) coupled to high resolution quadrupole-time of flight-mass spectrometer (HRMS-Q-TOF). A data-dependent inclusion list (IL) ex professo containing all known masses of PBs was applied to address PBs, and fragmentation patterns were studied to confirm their identity operating a MS2 method. Mass accuracy was set to 5 ppm for parent ion peaks, this parameter was adopted as inclusion criterium. The detection of PBs' appearance during ripening can be helpful for assessing the quality and maturity of the apples.
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Affiliation(s)
- Lisa Marie Gorfer
- Laimburg Research Centre, Laimburg 6 – Pfatten (Vadena), 39040 Auer (Ora), BZ, Italy
| | - Luca Vestrucci
- Laimburg Research Centre, Laimburg 6 – Pfatten (Vadena), 39040 Auer (Ora), BZ, Italy
- Faculty of Agricultural, Environmental and Food Sciences, Free University of Bozen-Bolzano, Piazza Università 5, 39100 Bolzano, Italy
| | - Valentina Grigoletto
- Laimburg Research Centre, Laimburg 6 – Pfatten (Vadena), 39040 Auer (Ora), BZ, Italy
| | - Valentina Lazazzara
- Laimburg Research Centre, Laimburg 6 – Pfatten (Vadena), 39040 Auer (Ora), BZ, Italy
| | - Angelo Zanella
- Laimburg Research Centre, Laimburg 6 – Pfatten (Vadena), 39040 Auer (Ora), BZ, Italy
| | - Peter Robatscher
- Laimburg Research Centre, Laimburg 6 – Pfatten (Vadena), 39040 Auer (Ora), BZ, Italy
| | - Matteo Scampicchio
- Faculty of Agricultural, Environmental and Food Sciences, Free University of Bozen-Bolzano, Piazza Università 5, 39100 Bolzano, Italy
| | - Michael Oberhuber
- Laimburg Research Centre, Laimburg 6 – Pfatten (Vadena), 39040 Auer (Ora), BZ, Italy
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2
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Ito H, Saito H, Fukui M, Tanaka A, Arakawa K. Poplar leaf abscission through induced chlorophyll breakdown by Mg-dechelatase. Plant Sci 2022; 324:111444. [PMID: 36031022 DOI: 10.1016/j.plantsci.2022.111444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/21/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Chlorophyll breakdown is observed during senescence. The first step in chlorophyll breakdown is the removal of central Mg by Mg-dechelatase. This reaction is the rate-limiting step in the chlorophyll breakdown pathway. We evaluated the effect of induced chlorophyll breakdown on abscission through the removal of Mg by Mg-dechelatase. Poplar transformants carrying the dexamethasone-inducible Mg-dechelatase gene were prepared using the Arabidopsis Stay-Green1 cDNA. When leaves were treated with dexamethasone, chlorophyll was degraded, photosynthetic capacity was reduced, and an abscission zone was formed, resulting in leaf abscission. In addition, ethylene, which plays an important role during senescence, was produced in this process. Thus, chlorophyll breakdown induces the phenotype in the same way as commonly observed during leaf senescence. This study suggests a physiological role of chlorophyll breakdown in the leaf abscission of deciduous trees. Furthermore, this study shows that the dexamethasone-inducible gene expression system is an available option for deciduous tree studies.
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Affiliation(s)
- Hisashi Ito
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo 060-0819, Japan.
| | - Hideyuki Saito
- Research Faculty of Agriculture, Hokkaido University, N9 W9, Sapporo 060-8589, Japan
| | - Manabu Fukui
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo 060-0819, Japan
| | - Ayumi Tanaka
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo 060-0819, Japan
| | - Keita Arakawa
- Research Faculty of Agriculture, Hokkaido University, N9 W9, Sapporo 060-8589, Japan
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3
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Fukura K, Tanaka A, Tanaka R, Ito H. Enrichment of chlorophyll catabolic enzymes in grana margins and their cooperation in catabolic reactions. J Plant Physiol 2021; 266:153535. [PMID: 34607178 DOI: 10.1016/j.jplph.2021.153535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/22/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
During leaf senescence, chlorophyll a and b are degraded through several enzymatic reactions, including chlorophyll b reductase, 7-hydroxymethyl chlorophyll a reductase, and Mg-dechelatase. Considering that the intermediates of the chlorophyll breakdown pathway are highly photoreactive, cooperative and efficient reactions of chlorophyll metabolic enzymes may protect chloroplasts from potential photo-oxidative damage. Here, we investigated the sub-organellar localization and cooperative reactions of the enzymes involved in the chlorophyll breakdown pathway by the fractionation of thylakoid membranes and enzymatic assays using recombinant proteins. We found that these enzymes were enriched in the grana margin fraction. Furthermore, we found that chlorophyll b reductase and Mg-dechelatase efficiently catabolized chlorophylls bound to the chlorophyll-protein complexes when these two enzymes were mixed. These results suggest that the co-localization of chlorophyll catabolic enzymes enables efficient chlorophyll breakdown. The results from this study highlight a key step forward in the investigation of the photosystem breakdown process.
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Affiliation(s)
- Koki Fukura
- Graduate School of Life Science, Hokkaido University, N10 W8, Sapporo, 060-0810, Japan; Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan
| | - Ayumi Tanaka
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan
| | - Ryouichi Tanaka
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan
| | - Hisashi Ito
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan.
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4
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Hu X, Jia T, Hörtensteiner S, Tanaka A, Tanaka R. Subcellular localization of chlorophyllase2 reveals it is not involved in chlorophyll degradation during senescence in Arabidopsis thaliana. Plant Sci 2020; 290:110314. [PMID: 31779896 DOI: 10.1016/j.plantsci.2019.110314] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/09/2019] [Accepted: 10/14/2019] [Indexed: 05/21/2023]
Abstract
Chlorophyllase (CLH), which catalyzes the release of the phytol chain from chlorophyll (Chl), has been long considered to catalyze the first step of Chl degradation. Arabidopsis contains two isoforms of CLH (CLH1 and CLH2), and CLH1 was previously demonstrated to be localized in tonoplast and endoplasmic reticulum, and not be involved in Chl degradation. In contrast, CLH2 possesses a predicted signal-peptide for chloroplast localization, and phylogenetic analysis of CLHs in Arabidopsis and other species also indicate that CLH2 forms a different clade than CLH1. Therefore, the possibility remains that CLH2 is involved in the breakdown of Chl. In the current study, clh mutants lacking CLH2 or both CLH isoforms were analyzed after the induction of senescence. Results indicated that the clh knockout lines were still able to degrade Chl at the same rate as wild-type plants. Transgenic Arabidopsis plants were generated that constitutively expressed either CLH2 or CLH2 fused to a yellow fluorescent protein (YFP). Observations made using confocal microscopy indicated that CLH2-YFP was located external to chloroplasts. Additionally, in overexpression plants, CLH2 was enriched in tonoplast and endoplasmic reticulum fractions following membrane fractionation. Based on the collective data, we conclude that CLH2 is not involved in Chl breakdown during senescence in Arabidopsis.
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Affiliation(s)
- Xueyun Hu
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225009, China
| | - Ting Jia
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
| | - Stefan Hörtensteiner
- Department of Plant and Microbial Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zurich, Switzerland
| | - Ayumi Tanaka
- Institute of Low Temperature Science, Hokkaido University, N19W8, Kita-ku, Sapporo 060-0819, Japan
| | - Ryouichi Tanaka
- Institute of Low Temperature Science, Hokkaido University, N19W8, Kita-ku, Sapporo 060-0819, Japan.
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Süssenbacher I, Menghini D, Scherzer G, Salinger K, Erhart T, Moser S, Vergeiner C, Hörtensteiner S, Kräutler B. Cryptic chlorophyll breakdown in non-senescent green Arabidopsis thaliana leaves. Photosynth Res 2019; 142:69-85. [PMID: 31172355 DOI: 10.1007/s11120-019-00649-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 05/20/2019] [Indexed: 06/09/2023]
Abstract
Chlorophyll (Chl) breakdown is a diagnostic visual process of leaf senescence, which furnishes phyllobilins (PBs) by the PAO/phyllobilin pathway. As Chl breakdown disables photosynthesis, it appears to have no role in photoactive green leaves. Here, colorless PBs were detected in green, non-senescent leaves of Arabidopsis thaliana. The PBs from the green leaves had structures entirely consistent with the PAO/phyllobilin pathway and the mutation of a single Chl catabolic enzyme completely abolished PBs with the particular modification. Hence, the PAO/phyllobilin pathway was active in the absence of visible senescence and expression of genes encoding Chl catabolic enzymes was observed in green Arabidopsis leaves. PBs accumulated to only sub-% amounts compared to the Chls present in the green leaves, excluding a substantial contribution of Chl breakdown from rapid Chl turnover associated with photosystem II repair. Indeed, Chl turnover was shown to involve a Chl a dephytylation and Chl a reconstitution cycle. However, non-recyclable pheophytin a is also liberated in the course of photosystem II repair, and is proposed here to be scavenged and degraded to the observed PBs. Hence, a cryptic form of the established pathway of Chl breakdown is indicated to play a constitutive role in photoactive leaves.
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Affiliation(s)
- Iris Süssenbacher
- Institute of Organic Chemistry and Centre of Molecular Biosciences, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Damian Menghini
- Institute of Plant and Microbial Biology, University of Zürich, Zollikerstrasse 107, 8008, Zurich, Switzerland
| | - Gerhard Scherzer
- Institute of Organic Chemistry and Centre of Molecular Biosciences, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Kathrin Salinger
- Institute of Plant and Microbial Biology, University of Zürich, Zollikerstrasse 107, 8008, Zurich, Switzerland
| | - Theresia Erhart
- Institute of Organic Chemistry and Centre of Molecular Biosciences, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Simone Moser
- Institute of Organic Chemistry and Centre of Molecular Biosciences, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Clemens Vergeiner
- Institute of Organic Chemistry and Centre of Molecular Biosciences, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Stefan Hörtensteiner
- Institute of Plant and Microbial Biology, University of Zürich, Zollikerstrasse 107, 8008, Zurich, Switzerland.
| | - Bernhard Kräutler
- Institute of Organic Chemistry and Centre of Molecular Biosciences, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria.
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6
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Das A, Christ B, Hörtensteiner S. Characterization of the pheophorbide a oxygenase/phyllobilin pathway of chlorophyll breakdown in grasses. Planta 2018; 248:875-892. [PMID: 29951845 DOI: 10.1007/s00425-018-2946-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 06/22/2018] [Indexed: 06/08/2023]
Abstract
Although the PAO/phyllobilin pathway of chlorophyll breakdown is active in grass leaf senescence, the abundance of phyllobilins is far below the amount of degraded chlorophyll. The yellowing of fully developed leaves is the most prominent visual symptom of plant senescence. Thereby, chlorophyll is degraded via the so-called pheophorbide a oxygenase (PAO)/phyllobilin pathway to a species-specific set of phyllobilins, linear tetrapyrrolic products of chlorophyll breakdown. Here, we investigated the diversity and abundance of phyllobilins in cereal and forage crops, i.e. barley, rice, ryegrass, sorghum and wheat, using liquid chromatography-mass spectrometry. A total of thirteen phyllobilins were identified, among them four novel, not yet described ones, pointing to a rather high diversity of phyllobilin-modifying activities present in the Gramineae. Along with these phyllobilins, barley orthologs of known Arabidopsis thaliana chlorophyll catabolic enzymes were demonstrated to localize in the chloroplast, and two of them, i.e. PAO and pheophytin pheophorbide hydrolase, complemented respective Arabidopsis mutants. These data confirm functionality of the PAO/phyllobilin pathway in grasses. Interestingly, when comparing phyllobilin abundance with amounts of degraded chlorophyll in senescent leaves, in most analyzed grass species only minor fractions of chlorophyll were recovered as phyllobilins, opposite to A. thaliana where phyllobilin quantities match degraded chlorophyll rather well. These data show that, despite the presence and activity of the PAO/phyllobilin pathway in barley (and other cereals), phyllobilins do not accumulate stoichiometrically, implying possible degradation of chlorophyll beyond the phyllobilin level.
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Affiliation(s)
- Aditi Das
- Department of Plant and Microbial Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland
| | - Bastien Christ
- Department of Plant and Microbial Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland
- Whitehead Institute, Massachusetts Institute of Technology, Cambridge, MA, 02139-4307, USA
| | - Stefan Hörtensteiner
- Department of Plant and Microbial Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland.
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7
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Abstract
Chlorophyll breakdown is one of the most obvious signs of leaf senescence and fruit ripening. The resulting yellowing of leaves can be observed every autumn, and the color change of fruits indicates their ripening state. During these processes, chlorophyll is broken down in a multistep pathway, now termed the 'PAO/phyllobilin' pathway, acknowledging the core enzymatic breakdown step catalysed by pheophorbide a oxygenase, which determines the basic linear tetrapyrrole structure of the products of breakdown that are now called 'phyllobilins'. This review provides an update on the PAO/phyllobilin pathway, and focuses on recent biochemical and molecular progress in understanding phyllobilin-modifying reactions as the basis for phyllobilin diversity, on the evolutionary diversity of the pathway, and on the transcriptional regulation of the pathway genes.
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Affiliation(s)
- Benke Kuai
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai, China
| | - Junyi Chen
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai, China
| | - Stefan Hörtensteiner
- Institute of Plant and Microbial Biology, University of Zurich, Zollikerstrasse, Zurich, Switzerland
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8
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Li H, Pu H. Crystal structure of methylesterase family member 16 (MES16) from Arabidopsis thaliana. Biochem Biophys Res Commun 2016; 474:226-231. [PMID: 27109476 DOI: 10.1016/j.bbrc.2016.04.115] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 04/20/2016] [Indexed: 11/19/2022]
Abstract
Methylesterase family member 16 (MES16) is an integral component of chlorophyll breakdown. It catalyzes the demethylation of fluorescent chlorophyll catabolite (FCC) and pheophorbide in vitro, and specifically demethylates FCC in vivo. Here we report the crystal structure of MES16 from Arabidopsis thaliana at 2.8 Å resolution. The structure confirm that MES16 is a member of the α/β-hydrolase superfamily with Ser-87, His-239, and Asp-211 as the catalytic triad. Our biochemical studies reveal that MES16 has esterase activity with methyl-indole acetic acid as the substrate, and the catalytically essential role of Ser-87 has been demonstrated.
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Affiliation(s)
- Hongmei Li
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, People's Republic of China.
| | - Hua Pu
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, People's Republic of China; University of Chinese Academy of Sciences, College of Life Science, Beijing, 101048, People's Republic of China
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9
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Springer A, Acker G, Bartsch S, Bauerschmitt H, Reinbothe S, Reinbothe C. Differences in gene expression between natural and artificially induced leaf senescence in barley. J Plant Physiol 2015; 176:180-91. [PMID: 25637827 DOI: 10.1016/j.jplph.2015.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 12/24/2014] [Accepted: 01/02/2015] [Indexed: 05/22/2023]
Abstract
Senescence is the last step of leaf development in the life span of an annual plant. Senescence can be induced prematurely by treating leaf tissues with jasmonic acid methyl ester (methyl jasmonate, MeJA). During both senescence programmes, drastic changes occur at the biochemical, cellular and ultra-structural levels that were compared here for primary leaves of barley (Hordeum vulgare L.). Our findings indicate that both types of senescence are similar with respect to the morphological changes including the loss of chlorophyll, disintegration of thylakoids, and formation of plastoglobules. However, the time elapsed for reaching senescence completion was different and ranged from 7 to 8 days for artificially senescing, MeJA-treated plants to 7-8 weeks for naturally senescing plants. Pulse-labelling studies along with RNA and protein gel blot analyses showed differential changes in the expression of both plastid and nuclear genes coding for photosynthetic proteins. Several unique messenger products accumulated in naturally and artificially senescing, MeJA-treated leaves. Detailed expression and crosslinking studies revealed that pheophorbide a oxygenase (PAO), a previously implicated key enzyme of chlorophyll breakdown, is most likely not rate-limiting for chlorophyll destruction under both senescence conditions. Metabolite profiling identified differential changes in the composition of carotenoid derivatives and prenyl-lipids to occur in naturally senescing and artificially senescing plants that underscored the differences between both senescence programmes.
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Affiliation(s)
- Armin Springer
- Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Georg Acker
- Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Sandra Bartsch
- Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | | | - Steffen Reinbothe
- Université Joseph Fourier, LBFA, BP53, F-38041 Grenoble cedex 9, France.
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Abstract
Some 109 tonnes of chlorophyll are destroyed each year on land and in the oceans. The fate of these chlorophylls is, however, largely unknown. This review describes the developmental stages at which chlorophyll breakdown occurs in aquatic and terrestrial biological systems, and the destruction arising from herbivory, disease, pollution and other physical hazards. At the cellular level, an attempt is made to separate the breakdown of chlorophyll during senescence from the many other events associated with cell destruction and death. A consideration of the more important chemical and biophysical properties of chlorophylls and their derivatives is provided, together with data on their spectral properties. The biosynthetic and biodegradative pathways of chlorophyll metabolism are, so far as is possible, described with some predictions as to the likely fate of the missing tonnes. Two types of degradation are recognized; the first involves up to five defined enzymes concerned with the early stages, the second covers the less well defined enzymic and non-enzymic destruction of the macrocyclic structure. These degradative reactions are compared with the reactions implicated in the breakdown of other porphyrins including haems in plants and animals. A brief description is given of the occurrence of breakdown products of chlorophyll in past biomass, including those of geological significance and those in a more recent archaeological context. Finally, the economic significance of chlorophyll breakdown is considered in the context of agriculture and horticulture, veterinary and medical sciences, food colouring and cosmetic industries, and the multi-million-dollar attraction of autumn leaf fall to tourism. Contents Summary 256 I. Introduction 256 II. Chlorophylls: global production and destruction 259 III. Chlorophylls: nomenclature and chemical characteristics 260 IV. Chlorophyll metabolism 268 V. Chlorophyll degradation during senescence 274 VI. Other degradative conditions 278 VII. Breakdown products in past biomass 287 VIII. Pathways of degradation 289 IX. Economic importance 291 Acknowledgements 294 References 294.
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Affiliation(s)
- George A F Hendry
- Unit of Comparative Plant Ecology (NERC), Department of Botany, The University, Sheffield S10 2TN, UK
| | | | - Stanley B Brown
- Department of Biochemistry, University of Leeds, Leeds LS2 9JT, UK
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