On the mechanism of resistance to paraquat in Hordeum glaucum and H. leporinum: Delayed inhibition of photosynthetic O2 evolution after paraquat application
The mechanism of resistance to paraquat was investigated in biotypes of Hordeum glaucum Steud. and H. leporinum Link. with high levels of resistance. Inhibition of photosynthetic O2 evolution after herbicide application was used to monitor the presence of paraquat at the active site. Inhibition of p...
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| Veröffentlicht in: | Plant physiology (Bethesda) 1992-10, Vol.100 (2), p.630-636 |
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| creator | Preston, Christopher Joseph A. M. Holtum Powles, Stephen B. |
| description | The mechanism of resistance to paraquat was investigated in biotypes of Hordeum glaucum Steud. and H. leporinum Link. with high levels of resistance. Inhibition of photosynthetic O2 evolution after herbicide application was used to monitor the presence of paraquat at the active site. Inhibition of photosynthetic O2 evolution after paraquat application was delayed in both resistant biotypes compared with the susceptible biotypes; however, this differential was more pronounced in the case of H. glaucum than in H. leporinum. Similar results could be obtained with the related herbicide diquat. Examination of the concentration dependence of paraquat-induced inhibition of evolution showed that the resistant H. glaucum biotype was less affected by herbicide compared with the susceptible biotype 3 h after treatment at most rates. The resistant H. leporinum biotype, in contrast, was as inhibited as the susceptible biotype except at the higher rates. In all cases photosynthetic evolution was dramatically inhibited 24 h after treatment. Measurement of the amount of paraquat transported to the young tissue of these plants 24 h after treatment showed 57% and 53% reductions in the amount of herbicide transported in the case of the resistant H. glaucum and H. leporinum biotypes, respectively, compared with the susceptible biotypes. This was associated with 62% and 66% decreases in photosynthetic evolution of young leaves in the susceptible H. glaucum and H. leporinum biotypes, respectively, a 39% decrease in activity for the resistant H. leporinum biotype, but no change in the resistant H. glaucum biotype. Photosynthetic evolution of leaf slices from resistant H. glaucum was not as inhibited by paraquat compared with the susceptible biotype; however, those of resistant and susceptible biotypes of H. leporinum were equally inhibited by paraquat. Paraquat resistance in these two biotypes appears to be a consequence of reduced movement of the herbicide in the resistant plants; howeve. |
| doi_str_mv | 10.1104/pp.100.2.630 |
| format | Article |
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M. Holtum ; Powles, Stephen B.</creator><creatorcontrib>Preston, Christopher ; Joseph A. M. Holtum ; Powles, Stephen B.</creatorcontrib><description>The mechanism of resistance to paraquat was investigated in biotypes of Hordeum glaucum Steud. and H. leporinum Link. with high levels of resistance. Inhibition of photosynthetic O2 evolution after herbicide application was used to monitor the presence of paraquat at the active site. Inhibition of photosynthetic O2 evolution after paraquat application was delayed in both resistant biotypes compared with the susceptible biotypes; however, this differential was more pronounced in the case of H. glaucum than in H. leporinum. Similar results could be obtained with the related herbicide diquat. Examination of the concentration dependence of paraquat-induced inhibition of evolution showed that the resistant H. glaucum biotype was less affected by herbicide compared with the susceptible biotype 3 h after treatment at most rates. The resistant H. leporinum biotype, in contrast, was as inhibited as the susceptible biotype except at the higher rates. In all cases photosynthetic evolution was dramatically inhibited 24 h after treatment. Measurement of the amount of paraquat transported to the young tissue of these plants 24 h after treatment showed 57% and 53% reductions in the amount of herbicide transported in the case of the resistant H. glaucum and H. leporinum biotypes, respectively, compared with the susceptible biotypes. This was associated with 62% and 66% decreases in photosynthetic evolution of young leaves in the susceptible H. glaucum and H. leporinum biotypes, respectively, a 39% decrease in activity for the resistant H. leporinum biotype, but no change in the resistant H. glaucum biotype. Photosynthetic evolution of leaf slices from resistant H. glaucum was not as inhibited by paraquat compared with the susceptible biotype; however, those of resistant and susceptible biotypes of H. leporinum were equally inhibited by paraquat. Paraquat resistance in these two biotypes appears to be a consequence of reduced movement of the herbicide in the resistant plants; howeve.</description><identifier>ISSN: 0032-0889</identifier><identifier>EISSN: 1532-2548</identifier><identifier>DOI: 10.1104/pp.100.2.630</identifier><identifier>CODEN: PPHYA5</identifier><language>eng</language><publisher>Rockville, MD: American Society of Plant Physiologists</publisher><subject>Biological and medical sciences ; biotipos ; biotype ; biotypes ; chemical resistance ; Chloroplasts ; dicuat ; diquat ; Environmental and Stress Physiology ; Evolution ; feuille ; fisiologia vegetal ; fotosintesis ; Fundamental and applied biological sciences. Psychology ; gases ; gaz ; herbicidas ; herbicide ; Herbicide resistance ; Herbicides ; hojas ; hordeum ; Leaves ; malezas ; mauvaise herbe ; Metabolism ; oxigeno ; oxygen ; oxygene ; paracuat ; paraquat ; photosynthese ; photosynthesis ; Photosynthesis, respiration. Anabolism, catabolism ; physiologie vegetale ; plant physiology ; Plant physiology and development ; Plants ; resistance aux produits chimiques ; Resistance mechanisms ; Resistance movements ; resistencia quimica ; Spraying ; Superoxides ; weeds</subject><ispartof>Plant physiology (Bethesda), 1992-10, Vol.100 (2), p.630-636</ispartof><rights>Copyright 1992 American Society of Plant Physiologists</rights><rights>1993 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/4274680$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4274680$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,27901,27902,57992,58225</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4562926$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Preston, Christopher</creatorcontrib><creatorcontrib>Joseph A. M. Holtum</creatorcontrib><creatorcontrib>Powles, Stephen B.</creatorcontrib><title>On the mechanism of resistance to paraquat in Hordeum glaucum and H. leporinum: Delayed inhibition of photosynthetic O2 evolution after paraquat application</title><title>Plant physiology (Bethesda)</title><description>The mechanism of resistance to paraquat was investigated in biotypes of Hordeum glaucum Steud. and H. leporinum Link. with high levels of resistance. Inhibition of photosynthetic O2 evolution after herbicide application was used to monitor the presence of paraquat at the active site. Inhibition of photosynthetic O2 evolution after paraquat application was delayed in both resistant biotypes compared with the susceptible biotypes; however, this differential was more pronounced in the case of H. glaucum than in H. leporinum. Similar results could be obtained with the related herbicide diquat. Examination of the concentration dependence of paraquat-induced inhibition of evolution showed that the resistant H. glaucum biotype was less affected by herbicide compared with the susceptible biotype 3 h after treatment at most rates. The resistant H. leporinum biotype, in contrast, was as inhibited as the susceptible biotype except at the higher rates. In all cases photosynthetic evolution was dramatically inhibited 24 h after treatment. Measurement of the amount of paraquat transported to the young tissue of these plants 24 h after treatment showed 57% and 53% reductions in the amount of herbicide transported in the case of the resistant H. glaucum and H. leporinum biotypes, respectively, compared with the susceptible biotypes. This was associated with 62% and 66% decreases in photosynthetic evolution of young leaves in the susceptible H. glaucum and H. leporinum biotypes, respectively, a 39% decrease in activity for the resistant H. leporinum biotype, but no change in the resistant H. glaucum biotype. Photosynthetic evolution of leaf slices from resistant H. glaucum was not as inhibited by paraquat compared with the susceptible biotype; however, those of resistant and susceptible biotypes of H. leporinum were equally inhibited by paraquat. Paraquat resistance in these two biotypes appears to be a consequence of reduced movement of the herbicide in the resistant plants; howeve.</description><subject>Biological and medical sciences</subject><subject>biotipos</subject><subject>biotype</subject><subject>biotypes</subject><subject>chemical resistance</subject><subject>Chloroplasts</subject><subject>dicuat</subject><subject>diquat</subject><subject>Environmental and Stress Physiology</subject><subject>Evolution</subject><subject>feuille</subject><subject>fisiologia vegetal</subject><subject>fotosintesis</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>gases</subject><subject>gaz</subject><subject>herbicidas</subject><subject>herbicide</subject><subject>Herbicide resistance</subject><subject>Herbicides</subject><subject>hojas</subject><subject>hordeum</subject><subject>Leaves</subject><subject>malezas</subject><subject>mauvaise herbe</subject><subject>Metabolism</subject><subject>oxigeno</subject><subject>oxygen</subject><subject>oxygene</subject><subject>paracuat</subject><subject>paraquat</subject><subject>photosynthese</subject><subject>photosynthesis</subject><subject>Photosynthesis, respiration. Anabolism, catabolism</subject><subject>physiologie vegetale</subject><subject>plant physiology</subject><subject>Plant physiology and development</subject><subject>Plants</subject><subject>resistance aux produits chimiques</subject><subject>Resistance mechanisms</subject><subject>Resistance movements</subject><subject>resistencia quimica</subject><subject>Spraying</subject><subject>Superoxides</subject><subject>weeds</subject><issn>0032-0889</issn><issn>1532-2548</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><recordid>eNpFkE-LFDEUxIMoOK7ePIrk4HXal3-dxJvsqiMszEH3PLzpTnaydHdikhbmu_hhzTrCnurBr6jiFSFvGXSMgfyYUscAOt71Ap6RDVOCb7mS5jnZALQbjLEvyatSHgCACSY35M9-ofXk6OyGEy6hzDR6ml0JpeIyOFojTZjx14qVhoXuYh7dOtP7CdehKS4j3XV0cinmsKzzJ3rjJjy7sZlP4RhqiMtjYjrFGst5aVU1DHTPqfsdp_UfRl9dfmrBlKYw4CN6TV54nIp781-vyN3XLz-vd9vb_bfv159vt55pXbf-aCwIHEfmuXS-10qJI1oL1guwTDmluUCnjkwZ0-teOKbtaJjEkRlpB3FFPlxyE5YBJ5_b66EcUg4z5vNBqp5b3jfbu4vtodSYnzDXsjfQ8PsL9hgPeJ9bwt0PZq0E0G14Lf4CCed_aQ</recordid><startdate>19921001</startdate><enddate>19921001</enddate><creator>Preston, Christopher</creator><creator>Joseph A. M. Holtum</creator><creator>Powles, Stephen B.</creator><general>American Society of Plant Physiologists</general><scope>FBQ</scope><scope>IQODW</scope></search><sort><creationdate>19921001</creationdate><title>On the mechanism of resistance to paraquat in Hordeum glaucum and H. leporinum: Delayed inhibition of photosynthetic O2 evolution after paraquat application</title><author>Preston, Christopher ; Joseph A. M. Holtum ; Powles, Stephen B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-f177t-fb8903add1f24ef67553ba9909f30915e5723ae5b15886763e179d814ad1849c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Biological and medical sciences</topic><topic>biotipos</topic><topic>biotype</topic><topic>biotypes</topic><topic>chemical resistance</topic><topic>Chloroplasts</topic><topic>dicuat</topic><topic>diquat</topic><topic>Environmental and Stress Physiology</topic><topic>Evolution</topic><topic>feuille</topic><topic>fisiologia vegetal</topic><topic>fotosintesis</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>gases</topic><topic>gaz</topic><topic>herbicidas</topic><topic>herbicide</topic><topic>Herbicide resistance</topic><topic>Herbicides</topic><topic>hojas</topic><topic>hordeum</topic><topic>Leaves</topic><topic>malezas</topic><topic>mauvaise herbe</topic><topic>Metabolism</topic><topic>oxigeno</topic><topic>oxygen</topic><topic>oxygene</topic><topic>paracuat</topic><topic>paraquat</topic><topic>photosynthese</topic><topic>photosynthesis</topic><topic>Photosynthesis, respiration. Anabolism, catabolism</topic><topic>physiologie vegetale</topic><topic>plant physiology</topic><topic>Plant physiology and development</topic><topic>Plants</topic><topic>resistance aux produits chimiques</topic><topic>Resistance mechanisms</topic><topic>Resistance movements</topic><topic>resistencia quimica</topic><topic>Spraying</topic><topic>Superoxides</topic><topic>weeds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Preston, Christopher</creatorcontrib><creatorcontrib>Joseph A. M. Holtum</creatorcontrib><creatorcontrib>Powles, Stephen B.</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><jtitle>Plant physiology (Bethesda)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Preston, Christopher</au><au>Joseph A. M. Holtum</au><au>Powles, Stephen B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>On the mechanism of resistance to paraquat in Hordeum glaucum and H. leporinum: Delayed inhibition of photosynthetic O2 evolution after paraquat application</atitle><jtitle>Plant physiology (Bethesda)</jtitle><date>1992-10-01</date><risdate>1992</risdate><volume>100</volume><issue>2</issue><spage>630</spage><epage>636</epage><pages>630-636</pages><issn>0032-0889</issn><eissn>1532-2548</eissn><coden>PPHYA5</coden><abstract>The mechanism of resistance to paraquat was investigated in biotypes of Hordeum glaucum Steud. and H. leporinum Link. with high levels of resistance. Inhibition of photosynthetic O2 evolution after herbicide application was used to monitor the presence of paraquat at the active site. Inhibition of photosynthetic O2 evolution after paraquat application was delayed in both resistant biotypes compared with the susceptible biotypes; however, this differential was more pronounced in the case of H. glaucum than in H. leporinum. Similar results could be obtained with the related herbicide diquat. Examination of the concentration dependence of paraquat-induced inhibition of evolution showed that the resistant H. glaucum biotype was less affected by herbicide compared with the susceptible biotype 3 h after treatment at most rates. The resistant H. leporinum biotype, in contrast, was as inhibited as the susceptible biotype except at the higher rates. In all cases photosynthetic evolution was dramatically inhibited 24 h after treatment. Measurement of the amount of paraquat transported to the young tissue of these plants 24 h after treatment showed 57% and 53% reductions in the amount of herbicide transported in the case of the resistant H. glaucum and H. leporinum biotypes, respectively, compared with the susceptible biotypes. This was associated with 62% and 66% decreases in photosynthetic evolution of young leaves in the susceptible H. glaucum and H. leporinum biotypes, respectively, a 39% decrease in activity for the resistant H. leporinum biotype, but no change in the resistant H. glaucum biotype. Photosynthetic evolution of leaf slices from resistant H. glaucum was not as inhibited by paraquat compared with the susceptible biotype; however, those of resistant and susceptible biotypes of H. leporinum were equally inhibited by paraquat. Paraquat resistance in these two biotypes appears to be a consequence of reduced movement of the herbicide in the resistant plants; howeve.</abstract><cop>Rockville, MD</cop><pub>American Society of Plant Physiologists</pub><doi>10.1104/pp.100.2.630</doi><tpages>7</tpages></addata></record> |
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| ispartof | Plant physiology (Bethesda), 1992-10, Vol.100 (2), p.630-636 |
| issn | 0032-0889 1532-2548 |
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| source | Jstor Complete Legacy; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | Biological and medical sciences biotipos biotype biotypes chemical resistance Chloroplasts dicuat diquat Environmental and Stress Physiology Evolution feuille fisiologia vegetal fotosintesis Fundamental and applied biological sciences. Psychology gases gaz herbicidas herbicide Herbicide resistance Herbicides hojas hordeum Leaves malezas mauvaise herbe Metabolism oxigeno oxygen oxygene paracuat paraquat photosynthese photosynthesis Photosynthesis, respiration. Anabolism, catabolism physiologie vegetale plant physiology Plant physiology and development Plants resistance aux produits chimiques Resistance mechanisms Resistance movements resistencia quimica Spraying Superoxides weeds |
| title | On the mechanism of resistance to paraquat in Hordeum glaucum and H. leporinum: Delayed inhibition of photosynthetic O2 evolution after paraquat application |
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