Immobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.)
High concentrations (up to 2.4 mM) of long-lived, immobilized, organic free radicals were observed in column boundary layer (CBL) reaction zones at the boundary between fungal lesions and healthy, functional sapwood (xylem) in sycamore (Acer pseudoplatanus L.). These free radicals, with measured hal...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1997
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| _version_ | 1797083992765235200 |
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| author | Pearce, R Edwards, P Green, T Anderson, P Fisher, B Carpenter, T Hall, L |
| author_facet | Pearce, R Edwards, P Green, T Anderson, P Fisher, B Carpenter, T Hall, L |
| author_sort | Pearce, R |
| collection | OXFORD |
| description | High concentrations (up to 2.4 mM) of long-lived, immobilized, organic free radicals were observed in column boundary layer (CBL) reaction zones at the boundary between fungal lesions and healthy, functional sapwood (xylem) in sycamore (Acer pseudoplatanus L.). These free radicals, with measured half-lives of up to 142 days at ambient temperature, were associated with the green polymeric material characteristically deposited in CBL reaction zones in this species, and may represent a novel category of chemical defence in plants. Such free radicals could contribute to the durable protection required in the bulky secondary tissues of living trees by acting as free radical scavengers, quenching the free radical chain reactions involved in the biodegradation of lignocellulose, thus protecting cell walls from decay and conferring a barrier function on the altered tissue. Reaction zone tissues were more resistant to decay and fungal colonization than normal A. pseudoplatanus sapwood. |
| first_indexed | 2024-03-07T01:49:22Z |
| format | Journal article |
| id | oxford-uuid:998926f3-12e3-45c3-887b-7698e23812f7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:49:22Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:998926f3-12e3-45c3-887b-7698e23812f72022-03-27T00:15:05ZImmobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:998926f3-12e3-45c3-887b-7698e23812f7EnglishSymplectic Elements at Oxford1997Pearce, REdwards, PGreen, TAnderson, PFisher, BCarpenter, THall, LHigh concentrations (up to 2.4 mM) of long-lived, immobilized, organic free radicals were observed in column boundary layer (CBL) reaction zones at the boundary between fungal lesions and healthy, functional sapwood (xylem) in sycamore (Acer pseudoplatanus L.). These free radicals, with measured half-lives of up to 142 days at ambient temperature, were associated with the green polymeric material characteristically deposited in CBL reaction zones in this species, and may represent a novel category of chemical defence in plants. Such free radicals could contribute to the durable protection required in the bulky secondary tissues of living trees by acting as free radical scavengers, quenching the free radical chain reactions involved in the biodegradation of lignocellulose, thus protecting cell walls from decay and conferring a barrier function on the altered tissue. Reaction zone tissues were more resistant to decay and fungal colonization than normal A. pseudoplatanus sapwood. |
| spellingShingle | Pearce, R Edwards, P Green, T Anderson, P Fisher, B Carpenter, T Hall, L Immobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.) |
| title | Immobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.) |
| title_full | Immobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.) |
| title_fullStr | Immobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.) |
| title_full_unstemmed | Immobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.) |
| title_short | Immobilized long-lived free radicals at the host-pathogen interface in sycamore (Acer pseudoplatanus L.) |
| title_sort | immobilized long lived free radicals at the host pathogen interface in sycamore acer pseudoplatanus l |
| work_keys_str_mv | AT pearcer immobilizedlonglivedfreeradicalsatthehostpathogeninterfaceinsycamoreacerpseudoplatanusl AT edwardsp immobilizedlonglivedfreeradicalsatthehostpathogeninterfaceinsycamoreacerpseudoplatanusl AT greent immobilizedlonglivedfreeradicalsatthehostpathogeninterfaceinsycamoreacerpseudoplatanusl AT andersonp immobilizedlonglivedfreeradicalsatthehostpathogeninterfaceinsycamoreacerpseudoplatanusl AT fisherb immobilizedlonglivedfreeradicalsatthehostpathogeninterfaceinsycamoreacerpseudoplatanusl AT carpentert immobilizedlonglivedfreeradicalsatthehostpathogeninterfaceinsycamoreacerpseudoplatanusl AT halll immobilizedlonglivedfreeradicalsatthehostpathogeninterfaceinsycamoreacerpseudoplatanusl |