Cargando…

A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus

BACKGROUND: Mechanical damage is an unavoidable threat to the growth and survival of plants. Although a wound to senescing (lower) leaves improves plant vitality, a wound to younger (upper) leaves often causes damage to or death of the whole plant. Source-sink models are often used to explain how pl...

Descripción completa

Detalles Bibliográficos
Autores principales: Chen, Qi, Lu, Xueyan, Guo, Xiaorui, Xu, Mingyuan, Tang, Zhonghua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7995597/
https://www.ncbi.nlm.nih.gov/pubmed/33771114
http://dx.doi.org/10.1186/s12870-021-02934-6
_version_ 1783669949392224256
author Chen, Qi
Lu, Xueyan
Guo, Xiaorui
Xu, Mingyuan
Tang, Zhonghua
author_facet Chen, Qi
Lu, Xueyan
Guo, Xiaorui
Xu, Mingyuan
Tang, Zhonghua
author_sort Chen, Qi
collection PubMed
description BACKGROUND: Mechanical damage is an unavoidable threat to the growth and survival of plants. Although a wound to senescing (lower) leaves improves plant vitality, a wound to younger (upper) leaves often causes damage to or death of the whole plant. Source-sink models are often used to explain how plants respond to biotic or abiotic stresses. In this study, a source-sink model was used to explain the difference in the metabolic mechanism of mechanical damage to young and senescing leaves of Catharanthus roseus. RESULTS: In our study, GC-MS and LC-QTOF-MS metabolomics techniques were used to explore the differences in source-sink allocation and metabolic regulation in different organs of Catharanthus roseus after mechanical damage to the upper/lower leaves (WUL/WLL). Compared with that of the control group, the energy supplies of the WUL and WLL groups were increased and delivered to the secondary metabolic pathway through the TCA cycle. The two treatment groups adopted different secondary metabolic response strategies. The WLL group increased the input to the defense response after damage by increasing the accumulation of phenolics. A source-sink model was applied to the defensive responses to local (damaged leaves) and systemic (whole plant) damage. In the WUL group, the number of sinks increased due to damage to young leaves, and the tolerance response was emphasized. CONCLUSION: The accumulation of primary and secondary metabolites was significantly different between the two mechanical damage treatments. Catharanthus roseus uses different trade-offs between tolerance (repair) and defense to respond to mechanical damage. Repairing damage and chemical defenses are thought to be more energetically expensive than growth development, confirming the trade-offs and allocation of resources seen in this source-sink model. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-021-02934-6.
format Online
Article
Text
id pubmed-7995597
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher BioMed Central
record_format MEDLINE/PubMed
spelling pubmed-79955972021-03-26 A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus Chen, Qi Lu, Xueyan Guo, Xiaorui Xu, Mingyuan Tang, Zhonghua BMC Plant Biol Research Article BACKGROUND: Mechanical damage is an unavoidable threat to the growth and survival of plants. Although a wound to senescing (lower) leaves improves plant vitality, a wound to younger (upper) leaves often causes damage to or death of the whole plant. Source-sink models are often used to explain how plants respond to biotic or abiotic stresses. In this study, a source-sink model was used to explain the difference in the metabolic mechanism of mechanical damage to young and senescing leaves of Catharanthus roseus. RESULTS: In our study, GC-MS and LC-QTOF-MS metabolomics techniques were used to explore the differences in source-sink allocation and metabolic regulation in different organs of Catharanthus roseus after mechanical damage to the upper/lower leaves (WUL/WLL). Compared with that of the control group, the energy supplies of the WUL and WLL groups were increased and delivered to the secondary metabolic pathway through the TCA cycle. The two treatment groups adopted different secondary metabolic response strategies. The WLL group increased the input to the defense response after damage by increasing the accumulation of phenolics. A source-sink model was applied to the defensive responses to local (damaged leaves) and systemic (whole plant) damage. In the WUL group, the number of sinks increased due to damage to young leaves, and the tolerance response was emphasized. CONCLUSION: The accumulation of primary and secondary metabolites was significantly different between the two mechanical damage treatments. Catharanthus roseus uses different trade-offs between tolerance (repair) and defense to respond to mechanical damage. Repairing damage and chemical defenses are thought to be more energetically expensive than growth development, confirming the trade-offs and allocation of resources seen in this source-sink model. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-021-02934-6. BioMed Central 2021-03-26 /pmc/articles/PMC7995597/ /pubmed/33771114 http://dx.doi.org/10.1186/s12870-021-02934-6 Text en © The Author(s) 2021 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Chen, Qi
Lu, Xueyan
Guo, Xiaorui
Xu, Mingyuan
Tang, Zhonghua
A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus
title A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus
title_full A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus
title_fullStr A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus
title_full_unstemmed A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus
title_short A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus
title_sort source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in catharanthus roseus
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7995597/
https://www.ncbi.nlm.nih.gov/pubmed/33771114
http://dx.doi.org/10.1186/s12870-021-02934-6
work_keys_str_mv AT chenqi asourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT luxueyan asourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT guoxiaorui asourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT xumingyuan asourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT tangzhonghua asourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT chenqi sourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT luxueyan sourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT guoxiaorui sourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT xumingyuan sourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus
AT tangzhonghua sourcesinkmodelexplainsthedifferenceinthemetabolicmechanismofmechanicaldamagetoyoungandsenescingleavesincatharanthusroseus