Effect of 2,4-dichlorophenoxyacetic acid on the structure and function of developing chloroplasts [radishes]
Dark-grown radish seedlings (Raphanus sativus L.) were sprayed with 10-3mol·l-1 2,4-di chlorophenoxyacetic acid and then were exposed to a 14:10 light:dark cycle. Cotyledon samples from these seedlings and unsprayed controls were taken for electron microscopy, chlorophyll determinations, and photosy...
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| Veröffentlicht in: | Planta 1977, Vol.137 (1), p.65-69 |
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| creator | Nadakavukaren, M.J. McCracken, D.A. |
| description | Dark-grown radish seedlings (Raphanus sativus L.) were sprayed with 10-3mol·l-1 2,4-di chlorophenoxyacetic acid and then were exposed to a 14:10 light:dark cycle. Cotyledon samples from these seedlings and unsprayed controls were taken for electron microscopy, chlorophyll determinations, and photosynthetic rate measurements at regular intervals for 72 h. A normal development of etioplasts to chloroplasts with formation of a typical grana-fret work system was observed in the control cotyledons. The chloroplasts in the 2,4-D-treated cotyledons showed changes in the organization of the grana thylakoids; these thylakoids being more appressed to each other than in the controls. The chlorophyll content of treated plants was less than that of controls but the rate of chlorophyll biosynthesis was unaffected. The photosynthetic rate/mg chlorophyll was considerably higher for treated plants suggesting that 2,4-D treatment resulted in decreased size of the photosynthetic unit. |
| doi_str_mv | 10.1007/BF00394437 |
| format | Article |
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Dept. of Biological Sciences ; Agrartudomanyi Egyetem, Keszthely (Hungary)</creatorcontrib><description>Dark-grown radish seedlings (Raphanus sativus L.) were sprayed with 10-3mol·l-1 2,4-di chlorophenoxyacetic acid and then were exposed to a 14:10 light:dark cycle. Cotyledon samples from these seedlings and unsprayed controls were taken for electron microscopy, chlorophyll determinations, and photosynthetic rate measurements at regular intervals for 72 h. A normal development of etioplasts to chloroplasts with formation of a typical grana-fret work system was observed in the control cotyledons. The chloroplasts in the 2,4-D-treated cotyledons showed changes in the organization of the grana thylakoids; these thylakoids being more appressed to each other than in the controls. The chlorophyll content of treated plants was less than that of controls but the rate of chlorophyll biosynthesis was unaffected. The photosynthetic rate/mg chlorophyll was considerably higher for treated plants suggesting that 2,4-D treatment resulted in decreased size of the photosynthetic unit.</description><identifier>ISSN: 0032-0935</identifier><identifier>EISSN: 1432-2048</identifier><identifier>DOI: 10.1007/BF00394437</identifier><identifier>PMID: 24420520</identifier><language>eng</language><publisher>Germany: Springer-Verlag</publisher><subject>Chlorophylls ; Chloroplasts ; Cotyledons ; Grana ; Greening ; Leaves ; Photosynthesis ; Plants ; Radishes ; Thylakoids</subject><ispartof>Planta, 1977, Vol.137 (1), p.65-69</ispartof><rights>Springer-Verlag Berlin Heidelberg 1977</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c332t-5666b248d0464bf6891f917edc408b9ebf243ff4d24d5f49048e19097143d0323</citedby><cites>FETCH-LOGICAL-c332t-5666b248d0464bf6891f917edc408b9ebf243ff4d24d5f49048e19097143d0323</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/23373031$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/23373031$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,4010,27900,27901,27902,57992,58225</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24420520$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Nadakavukaren, M.J.</creatorcontrib><creatorcontrib>McCracken, D.A.</creatorcontrib><creatorcontrib>Illinois State Univ., Normal (USA). Dept. of Biological Sciences</creatorcontrib><creatorcontrib>Agrartudomanyi Egyetem, Keszthely (Hungary)</creatorcontrib><title>Effect of 2,4-dichlorophenoxyacetic acid on the structure and function of developing chloroplasts [radishes]</title><title>Planta</title><addtitle>Planta</addtitle><description>Dark-grown radish seedlings (Raphanus sativus L.) were sprayed with 10-3mol·l-1 2,4-di chlorophenoxyacetic acid and then were exposed to a 14:10 light:dark cycle. Cotyledon samples from these seedlings and unsprayed controls were taken for electron microscopy, chlorophyll determinations, and photosynthetic rate measurements at regular intervals for 72 h. A normal development of etioplasts to chloroplasts with formation of a typical grana-fret work system was observed in the control cotyledons. The chloroplasts in the 2,4-D-treated cotyledons showed changes in the organization of the grana thylakoids; these thylakoids being more appressed to each other than in the controls. The chlorophyll content of treated plants was less than that of controls but the rate of chlorophyll biosynthesis was unaffected. The photosynthetic rate/mg chlorophyll was considerably higher for treated plants suggesting that 2,4-D treatment resulted in decreased size of the photosynthetic unit.</description><subject>Chlorophylls</subject><subject>Chloroplasts</subject><subject>Cotyledons</subject><subject>Grana</subject><subject>Greening</subject><subject>Leaves</subject><subject>Photosynthesis</subject><subject>Plants</subject><subject>Radishes</subject><subject>Thylakoids</subject><issn>0032-0935</issn><issn>1432-2048</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1977</creationdate><recordtype>article</recordtype><recordid>eNpFkM1v1DAUxC0EotvChTvIR1SR8vyROD6WsqVIlXqBE0KRYz93XWXjxXYq-t9jtAt7etKb34w0Q8gbBhcMQH38dA0gtJRCPSMrJgVvOMj-OVnVN29Ai_aEnOb8AFBFpV6SEy4lh5bDikxr79EWGj3lH2Tjgt1MMcXdBuf4-8lYLMFSY4OjcaZlgzSXtNiyJKRmdtQvsy2hStXv8BGnuAvzPT2ETCaXTH8k40LeYP75irzwZsr4-nDPyPfr9berm-b27svXq8vbxgrBS9N2XTdy2TuQnRx912vmNVPorIR-1Dh6LoX30nHpWi91LYtMg1a1nquVxRl5v8_dpfhrwVyGbcgWp8nMGJc8sOpRiinNKnq-R22KOSf0wy6FrUlPA4Ph77rDcd0KvzvkLuMW3X_035wVeLsHHnKJ6aiLagbBjgHexMHcp5CHz2umVQ9C6pa34g_LZoae</recordid><startdate>1977</startdate><enddate>1977</enddate><creator>Nadakavukaren, M.J.</creator><creator>McCracken, D.A.</creator><general>Springer-Verlag</general><scope>FBQ</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>1977</creationdate><title>Effect of 2,4-dichlorophenoxyacetic acid on the structure and function of developing chloroplasts [radishes]</title><author>Nadakavukaren, M.J. ; McCracken, D.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c332t-5666b248d0464bf6891f917edc408b9ebf243ff4d24d5f49048e19097143d0323</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1977</creationdate><topic>Chlorophylls</topic><topic>Chloroplasts</topic><topic>Cotyledons</topic><topic>Grana</topic><topic>Greening</topic><topic>Leaves</topic><topic>Photosynthesis</topic><topic>Plants</topic><topic>Radishes</topic><topic>Thylakoids</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nadakavukaren, M.J.</creatorcontrib><creatorcontrib>McCracken, D.A.</creatorcontrib><creatorcontrib>Illinois State Univ., Normal (USA). Dept. of Biological Sciences</creatorcontrib><creatorcontrib>Agrartudomanyi Egyetem, Keszthely (Hungary)</creatorcontrib><collection>AGRIS</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Planta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nadakavukaren, M.J.</au><au>McCracken, D.A.</au><aucorp>Illinois State Univ., Normal (USA). Dept. of Biological Sciences</aucorp><aucorp>Agrartudomanyi Egyetem, Keszthely (Hungary)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of 2,4-dichlorophenoxyacetic acid on the structure and function of developing chloroplasts [radishes]</atitle><jtitle>Planta</jtitle><addtitle>Planta</addtitle><date>1977</date><risdate>1977</risdate><volume>137</volume><issue>1</issue><spage>65</spage><epage>69</epage><pages>65-69</pages><issn>0032-0935</issn><eissn>1432-2048</eissn><abstract>Dark-grown radish seedlings (Raphanus sativus L.) were sprayed with 10-3mol·l-1 2,4-di chlorophenoxyacetic acid and then were exposed to a 14:10 light:dark cycle. Cotyledon samples from these seedlings and unsprayed controls were taken for electron microscopy, chlorophyll determinations, and photosynthetic rate measurements at regular intervals for 72 h. A normal development of etioplasts to chloroplasts with formation of a typical grana-fret work system was observed in the control cotyledons. The chloroplasts in the 2,4-D-treated cotyledons showed changes in the organization of the grana thylakoids; these thylakoids being more appressed to each other than in the controls. The chlorophyll content of treated plants was less than that of controls but the rate of chlorophyll biosynthesis was unaffected. The photosynthetic rate/mg chlorophyll was considerably higher for treated plants suggesting that 2,4-D treatment resulted in decreased size of the photosynthetic unit.</abstract><cop>Germany</cop><pub>Springer-Verlag</pub><pmid>24420520</pmid><doi>10.1007/BF00394437</doi><tpages>5</tpages></addata></record> |
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| ispartof | Planta, 1977, Vol.137 (1), p.65-69 |
| issn | 0032-0935 1432-2048 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1490771791 |
| source | Jstor Complete Legacy; SpringerLink Journals - AutoHoldings |
| subjects | Chlorophylls Chloroplasts Cotyledons Grana Greening Leaves Photosynthesis Plants Radishes Thylakoids |
| title | Effect of 2,4-dichlorophenoxyacetic acid on the structure and function of developing chloroplasts [radishes] |
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