Nuclear magnetic resonance characterization of metabolite disorder in orange trees caused by citrus sudden death disease
Identifieur interne : 001E62 ( Main/Exploration ); précédent : 001E61; suivant : 001E63Nuclear magnetic resonance characterization of metabolite disorder in orange trees caused by citrus sudden death disease
Auteurs : Rosilene A. Prestes [Brésil] ; Luiz A. Colnago [Brésil] ; Lucimara A. Forato [Brésil] ; Emanuel Carrilho [Brésil] ; Renato B. Bassanezi [Brésil] ; Nelson A. Wulff [Brésil]Source :
- Molecular Plant Pathology [ 1464-6722 ] ; 2009-01.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Maladie.
English descriptors
- KwdEn :
- MESH :
- methods : Nuclear Magnetic Resonance, Biomolecular.
- pathogenicity : Plant Viruses.
- virology : Citrus sinensis.
- Gas Chromatography-Mass Spectrometry, Plant Diseases.
Abstract
Citrus sudden death (CSD) is a new disease of sweet orange and mandarin trees grafted on Rangpur lime and Citrus volkameriana rootstocks. It was first seen in Brazil in 1999, and has since been detected in more than four million trees. The CSD causal agent is unknown and the current hypothesis involves a virus similar to Citrus tristeza virus or a new virus named Citrus sudden death‐associated virus. CSD symptoms include generalized foliar discoloration, defoliation and root death, and, in most cases, it can cause tree death. One of the unique characteristics of CSD disease is the presence of a yellow stain in the rootstock bark near the bud union. This region also undergoes profound anatomical changes. In this study, we analyse the metabolic disorder caused by CSD in the bark of sweet orange grafted on Rangpur lime by nuclear magnetic resonance (NMR) spectroscopy and imaging. The imaging results show the presence of a large amount of non‐functional phloem in the rootstock bark of affected plants. The spectroscopic analysis shows a high content of triacylglyceride and sucrose, which may be related to phloem blockage close to the bud union. We also propose that, without knowing the causal CSD agent, the determination of oil content in rootstock bark by low‐resolution NMR can be used as a complementary method for CSD diagnosis, screening about 300 samples per hour.
Url:
DOI: 10.1111/j.1364-3703.2008.00507.x
Affiliations:
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Le document en format XML
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<term>Nuclear Magnetic Resonance, Biomolecular (methods)</term>
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<front><div type="abstract" xml:lang="en">Citrus sudden death (CSD) is a new disease of sweet orange and mandarin trees grafted on Rangpur lime and Citrus volkameriana rootstocks. It was first seen in Brazil in 1999, and has since been detected in more than four million trees. The CSD causal agent is unknown and the current hypothesis involves a virus similar to Citrus tristeza virus or a new virus named Citrus sudden death‐associated virus. CSD symptoms include generalized foliar discoloration, defoliation and root death, and, in most cases, it can cause tree death. One of the unique characteristics of CSD disease is the presence of a yellow stain in the rootstock bark near the bud union. This region also undergoes profound anatomical changes. In this study, we analyse the metabolic disorder caused by CSD in the bark of sweet orange grafted on Rangpur lime by nuclear magnetic resonance (NMR) spectroscopy and imaging. The imaging results show the presence of a large amount of non‐functional phloem in the rootstock bark of affected plants. The spectroscopic analysis shows a high content of triacylglyceride and sucrose, which may be related to phloem blockage close to the bud union. We also propose that, without knowing the causal CSD agent, the determination of oil content in rootstock bark by low‐resolution NMR can be used as a complementary method for CSD diagnosis, screening about 300 samples per hour.</div>
</front>
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<name sortKey="Bassanezi, Renato B" sort="Bassanezi, Renato B" uniqKey="Bassanezi R" first="Renato B." last="Bassanezi">Renato B. Bassanezi</name>
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<name sortKey="Colnago, Luiz A" sort="Colnago, Luiz A" uniqKey="Colnago L" first="Luiz A." last="Colnago">Luiz A. Colnago</name>
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<name sortKey="Wulff, Nelson A" sort="Wulff, Nelson A" uniqKey="Wulff N" first="Nelson A." last="Wulff">Nelson A. Wulff</name>
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