Oxygen availability in polyethylene glycol solutions and its implications in plant-water relations
The solubility of O2 in polyethylene glycol 4000 and 6000 solutions of varying concentrations was determined iodimetrically (titrimetrically) and electrochemically using a rotating glassy carbon electrode and a PAR Model 174 Polarograph. The titrimetric determination resulted in the formation of an...
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| Veröffentlicht in: | Plant physiology (Bethesda) 1975-01, Vol.55 (1), p.20-24 |
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| container_title | Plant physiology (Bethesda) |
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| creator | Mexal, J Fisher, J.T Osteryoung, J Reid, C.P.P |
| description | The solubility of O2 in polyethylene glycol 4000 and 6000 solutions of varying concentrations was determined iodimetrically (titrimetrically) and electrochemically using a rotating glassy carbon electrode and a PAR Model 174 Polarograph. The titrimetric determination resulted in the formation of an unexpected precipitate at 2% (w/v) polyethylene glycol corresponding to the approximate critical micelle concentration of the two polyethylene glycol homologs. Beyond 5% polyethylene glycol, O2 concentration was inversely proportional to polyethylene glycol concentration, and was higher in polyethylene glycol 4000 solutions than in polyethylene glycol 6000. The electrochemical data are a direct measure of O2 transport to the electrode surface, rather than O2 activity or concentration. Results indicate that even at relatively high H2O potentials, the transport of O2 to the root surface might be insufficient to meet the plant's respiratory requirements. |
| doi_str_mv | 10.1104/pp.55.1.20 |
| format | Article |
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The titrimetric determination resulted in the formation of an unexpected precipitate at 2% (w/v) polyethylene glycol corresponding to the approximate critical micelle concentration of the two polyethylene glycol homologs. Beyond 5% polyethylene glycol, O2 concentration was inversely proportional to polyethylene glycol concentration, and was higher in polyethylene glycol 4000 solutions than in polyethylene glycol 6000. The electrochemical data are a direct measure of O2 transport to the electrode surface, rather than O2 activity or concentration. Results indicate that even at relatively high H2O potentials, the transport of O2 to the root surface might be insufficient to meet the plant's respiratory requirements.</description><identifier>ISSN: 0032-0889</identifier><identifier>EISSN: 1532-2548</identifier><identifier>DOI: 10.1104/pp.55.1.20</identifier><identifier>PMID: 16659021</identifier><language>eng</language><publisher>United States: American Society of Plant Physiologists</publisher><subject>Electric current ; Electrodes ; Glycols ; Oxygen ; Plant roots ; Plants ; Polyethylenes ; Root growth ; Soil water ; Solubility</subject><ispartof>Plant physiology (Bethesda), 1975-01, Vol.55 (1), p.20-24</ispartof><rights>Copyright 1975 The American Society of Plant Physiologists</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c326t-630ac98f145d9036cacd835b223a937e180d146e6eac5834722bdd57ad1c437f3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/4263860$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4263860$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,27924,27925,58017,58250</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16659021$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Mexal, J</creatorcontrib><creatorcontrib>Fisher, J.T</creatorcontrib><creatorcontrib>Osteryoung, J</creatorcontrib><creatorcontrib>Reid, C.P.P</creatorcontrib><title>Oxygen availability in polyethylene glycol solutions and its implications in plant-water relations</title><title>Plant physiology (Bethesda)</title><addtitle>Plant Physiol</addtitle><description>The solubility of O2 in polyethylene glycol 4000 and 6000 solutions of varying concentrations was determined iodimetrically (titrimetrically) and electrochemically using a rotating glassy carbon electrode and a PAR Model 174 Polarograph. The titrimetric determination resulted in the formation of an unexpected precipitate at 2% (w/v) polyethylene glycol corresponding to the approximate critical micelle concentration of the two polyethylene glycol homologs. Beyond 5% polyethylene glycol, O2 concentration was inversely proportional to polyethylene glycol concentration, and was higher in polyethylene glycol 4000 solutions than in polyethylene glycol 6000. The electrochemical data are a direct measure of O2 transport to the electrode surface, rather than O2 activity or concentration. Results indicate that even at relatively high H2O potentials, the transport of O2 to the root surface might be insufficient to meet the plant's respiratory requirements.</description><subject>Electric current</subject><subject>Electrodes</subject><subject>Glycols</subject><subject>Oxygen</subject><subject>Plant roots</subject><subject>Plants</subject><subject>Polyethylenes</subject><subject>Root growth</subject><subject>Soil water</subject><subject>Solubility</subject><issn>0032-0889</issn><issn>1532-2548</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1975</creationdate><recordtype>article</recordtype><recordid>eNpFkctLxDAQxoMouj4uHkUkN0HomnfToyy-QPCgnkOapmsk29Qkq_a_t0sXPc0w3-8bhm8AOMVojjFi130_53yO5wTtgBnmlBSEM7kLZgiNPZKyOgCHKX0ghDDFbB8cYCF4hQiegfr5Z1jaDuov7byunXd5gK6DffCDze-Dt52FSz-Y4GEKfp1d6BLUXQNdTtCteu-MnoYbl9ddLr51thFG6yfhGOy12id7sq1H4O3u9nXxUDw93z8ubp4KQ4nIhaBIm0q2mPGmQlQYbRpJeU0I1RUtLZaowUxYYbXhkrKSkLppeKkbbBgtW3oELqe9fQyfa5uyWrlkrB9vsmGdVEkpk6wUZCSvJtLEkFK0reqjW-k4KIzUJlLV94pzhRVBI3yxXbuuV7b5R7cZjsD5BHykHOKfzoigUmz8Z5Pc6qD0Mrqk3l5KPr6CM_oLgxGEpg</recordid><startdate>197501</startdate><enddate>197501</enddate><creator>Mexal, J</creator><creator>Fisher, J.T</creator><creator>Osteryoung, J</creator><creator>Reid, C.P.P</creator><general>American Society of Plant Physiologists</general><scope>FBQ</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>197501</creationdate><title>Oxygen availability in polyethylene glycol solutions and its implications in plant-water relations</title><author>Mexal, J ; Fisher, J.T ; Osteryoung, J ; Reid, C.P.P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c326t-630ac98f145d9036cacd835b223a937e180d146e6eac5834722bdd57ad1c437f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1975</creationdate><topic>Electric current</topic><topic>Electrodes</topic><topic>Glycols</topic><topic>Oxygen</topic><topic>Plant roots</topic><topic>Plants</topic><topic>Polyethylenes</topic><topic>Root growth</topic><topic>Soil water</topic><topic>Solubility</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mexal, J</creatorcontrib><creatorcontrib>Fisher, J.T</creatorcontrib><creatorcontrib>Osteryoung, J</creatorcontrib><creatorcontrib>Reid, C.P.P</creatorcontrib><collection>AGRIS</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Plant physiology (Bethesda)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mexal, J</au><au>Fisher, J.T</au><au>Osteryoung, J</au><au>Reid, C.P.P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Oxygen availability in polyethylene glycol solutions and its implications in plant-water relations</atitle><jtitle>Plant physiology (Bethesda)</jtitle><addtitle>Plant Physiol</addtitle><date>1975-01</date><risdate>1975</risdate><volume>55</volume><issue>1</issue><spage>20</spage><epage>24</epage><pages>20-24</pages><issn>0032-0889</issn><eissn>1532-2548</eissn><abstract>The solubility of O2 in polyethylene glycol 4000 and 6000 solutions of varying concentrations was determined iodimetrically (titrimetrically) and electrochemically using a rotating glassy carbon electrode and a PAR Model 174 Polarograph. 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| ispartof | Plant physiology (Bethesda), 1975-01, Vol.55 (1), p.20-24 |
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| language | eng |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; JSTOR Archive Collection A-Z Listing; Alma/SFX Local Collection |
| subjects | Electric current Electrodes Glycols Oxygen Plant roots Plants Polyethylenes Root growth Soil water Solubility |
| title | Oxygen availability in polyethylene glycol solutions and its implications in plant-water relations |
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