Histological and Cytological Effects of Haloxyfop on Sorghum (Sorghum bicolor) and Unicorn-Plant (Proboscidea louisianica) Root Meristems
The effects of haloxyfop on elongation, mitotic index, and morphology of sorghum and unicorn-plant primary roots were examined. Elongation of sorghum roots was completely inhibited by haloxyfop concentrations of 10–6 M or greater 24 h after treatment, whereas unicorn-plant root elongation was unaffe...
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Veröffentlicht in: | Weed science 1989-07, Vol.37 (4), p.503-511 |
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description | The effects of haloxyfop on elongation, mitotic index, and morphology of sorghum and unicorn-plant primary roots were examined. Elongation of sorghum roots was completely inhibited by haloxyfop concentrations of 10–6 M or greater 24 h after treatment, whereas unicorn-plant root elongation was unaffected by the same concentrations 72 h after treatment. Mitotic indices of sorghum roots were reduced by both 10–6 and 10–8 M haloxyfop, with the higher concentration reducing the index to near zero by 24 h of exposure. The mitotic indices of unicorn-plant roots were unaffected by the same levels of the herbicide after both 24- and 48-h treatment. Histological analyses showed that after 24 h exposure to 10–6 M haloxyfop, large vacuoles were present in cells at the root apex that normally did not exhibit these organelles. After 48 h of exposure many cells in the apical region appeared to lack visible cytoplasm and/or nuclei, and by 72 h only cell walls remained visibly evident, and many cells had collapsed. These changes are similar to those that occur in tissues undergoing senescence. Treatment of sorghum roots with 10–8 M haloxyfop did not cause discernible changes after 72 h. Unicorn-plant roots treated with 10–6 M haloxyfop appeared unaffected after 72 h. |
doi_str_mv | 10.1017/S0043174500072313 |
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Elongation of sorghum roots was completely inhibited by haloxyfop concentrations of 10–6 M or greater 24 h after treatment, whereas unicorn-plant root elongation was unaffected by the same concentrations 72 h after treatment. Mitotic indices of sorghum roots were reduced by both 10–6 and 10–8 M haloxyfop, with the higher concentration reducing the index to near zero by 24 h of exposure. The mitotic indices of unicorn-plant roots were unaffected by the same levels of the herbicide after both 24- and 48-h treatment. Histological analyses showed that after 24 h exposure to 10–6 M haloxyfop, large vacuoles were present in cells at the root apex that normally did not exhibit these organelles. After 48 h of exposure many cells in the apical region appeared to lack visible cytoplasm and/or nuclei, and by 72 h only cell walls remained visibly evident, and many cells had collapsed. These changes are similar to those that occur in tissues undergoing senescence. Treatment of sorghum roots with 10–8 M haloxyfop did not cause discernible changes after 72 h. Unicorn-plant roots treated with 10–6 M haloxyfop appeared unaffected after 72 h.</description><identifier>ISSN: 0043-1745</identifier><identifier>EISSN: 1550-2759</identifier><identifier>DOI: 10.1017/S0043174500072313</identifier><identifier>CODEN: WEESA6</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>ANATOMIA DE LA PLANTA ; ANATOMIE VEGETALE ; Biological and medical sciences ; Cell walls ; Chemical control ; CITOLOGIA ; CYTOLOGIE ; ENVEJECIMIENTO ; Fundamental and applied biological sciences. Psychology ; HERBICIDAS ; HERBICIDE ; Herbicides ; HISTOLOGIA ; HISTOLOGIE ; Histology ; MERISTEMAS ; MERISTEME ; METABOLISME ; METABOLISMO ; MITOSE ; MITOSIS ; Mitotic index ; Parasitic plants. Weeds ; Physiology, Chemistry and Biochemistry ; Phytopathology. Animal pests. Plant and forest protection ; Plant roots ; Plants ; RACINE ; RAICES ; Root growth ; Root tips ; Sorghum ; SORGHUM BICOLOR ; TUBIFLORAE ; VACUOLA ; VACUOLE ; Vacuoles ; VIEILLISSEMENT ; Weeds</subject><ispartof>Weed science, 1989-07, Vol.37 (4), p.503-511</ispartof><rights>Copyright © 1989 by the Weed Science Society of America</rights><rights>Copyright 1989 The Weed Science Society of America</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c288t-871803b3046fb4084940f8d1b5416a631ca6599d9bafd58f2814470215b467b53</citedby><cites>FETCH-LOGICAL-c288t-871803b3046fb4084940f8d1b5416a631ca6599d9bafd58f2814470215b467b53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/4044686$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4044686$$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=6607178$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Vaughn, Steven F.</creatorcontrib><creatorcontrib>Merkle, Morris G.</creatorcontrib><title>Histological and Cytological Effects of Haloxyfop on Sorghum (Sorghum bicolor) and Unicorn-Plant (Proboscidea louisianica) Root Meristems</title><title>Weed science</title><addtitle>Weed sci</addtitle><description>The effects of haloxyfop on elongation, mitotic index, and morphology of sorghum and unicorn-plant primary roots were examined. Elongation of sorghum roots was completely inhibited by haloxyfop concentrations of 10–6 M or greater 24 h after treatment, whereas unicorn-plant root elongation was unaffected by the same concentrations 72 h after treatment. Mitotic indices of sorghum roots were reduced by both 10–6 and 10–8 M haloxyfop, with the higher concentration reducing the index to near zero by 24 h of exposure. The mitotic indices of unicorn-plant roots were unaffected by the same levels of the herbicide after both 24- and 48-h treatment. Histological analyses showed that after 24 h exposure to 10–6 M haloxyfop, large vacuoles were present in cells at the root apex that normally did not exhibit these organelles. After 48 h of exposure many cells in the apical region appeared to lack visible cytoplasm and/or nuclei, and by 72 h only cell walls remained visibly evident, and many cells had collapsed. These changes are similar to those that occur in tissues undergoing senescence. Treatment of sorghum roots with 10–8 M haloxyfop did not cause discernible changes after 72 h. Unicorn-plant roots treated with 10–6 M haloxyfop appeared unaffected after 72 h.</description><subject>ANATOMIA DE LA PLANTA</subject><subject>ANATOMIE VEGETALE</subject><subject>Biological and medical sciences</subject><subject>Cell walls</subject><subject>Chemical control</subject><subject>CITOLOGIA</subject><subject>CYTOLOGIE</subject><subject>ENVEJECIMIENTO</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>HERBICIDAS</subject><subject>HERBICIDE</subject><subject>Herbicides</subject><subject>HISTOLOGIA</subject><subject>HISTOLOGIE</subject><subject>Histology</subject><subject>MERISTEMAS</subject><subject>MERISTEME</subject><subject>METABOLISME</subject><subject>METABOLISMO</subject><subject>MITOSE</subject><subject>MITOSIS</subject><subject>Mitotic index</subject><subject>Parasitic plants. Weeds</subject><subject>Physiology, Chemistry and Biochemistry</subject><subject>Phytopathology. Animal pests. Plant and forest protection</subject><subject>Plant roots</subject><subject>Plants</subject><subject>RACINE</subject><subject>RAICES</subject><subject>Root growth</subject><subject>Root tips</subject><subject>Sorghum</subject><subject>SORGHUM BICOLOR</subject><subject>TUBIFLORAE</subject><subject>VACUOLA</subject><subject>VACUOLE</subject><subject>Vacuoles</subject><subject>VIEILLISSEMENT</subject><subject>Weeds</subject><issn>0043-1745</issn><issn>1550-2759</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><recordid>eNp9kc1qGzEUhUVooW7SB2joQossksUk945-ZxlMWgcSGuJ6PUgzI1dmPDLSGOpHyFtXjvOzKHQlXb5zLkdHhHxFuERAdTUH4AwVFwCgSobsiExQCChKJaoPZLLHxZ5_Ip9TWgGgLLGakKeZT2Pow9I3pqdmaOl09z7fONc1Y6LB0Znpw5-dCxsaBjoPcfl7u6bnrxfrm2yKF88bFkOe4lA89GYY6flDDDakxredoX3Y-uRNFpgL-hjCSO-7mBN063RCPjrTp-7Ly3lMFt9vfk1nxd3PH7fT67uiKbUeC61QA7MMuHSWg-YVB6dbtIKjNJJhY6SoqrayxrVCu1Ij5wpKFJZLZQU7JnjY28SQUuxcvYl-beKuRqj3Xdb_dJk9ZwfPxqTci4tmaHx6M0oJCpXOsm8H2Sp3Gt8wB86llhmfHrAzoTbL_O56Ma_yT7ByD9lLLLO20bfLrl6FbRxyFf8J9hc7HpTA</recordid><startdate>19890701</startdate><enddate>19890701</enddate><creator>Vaughn, Steven F.</creator><creator>Merkle, Morris G.</creator><general>Cambridge University Press</general><general>Weed Science Society of America</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19890701</creationdate><title>Histological and Cytological Effects of Haloxyfop on Sorghum (Sorghum bicolor) and Unicorn-Plant (Proboscidea louisianica) Root Meristems</title><author>Vaughn, Steven F. ; Merkle, Morris G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c288t-871803b3046fb4084940f8d1b5416a631ca6599d9bafd58f2814470215b467b53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1989</creationdate><topic>ANATOMIA DE LA PLANTA</topic><topic>ANATOMIE VEGETALE</topic><topic>Biological and medical sciences</topic><topic>Cell walls</topic><topic>Chemical control</topic><topic>CITOLOGIA</topic><topic>CYTOLOGIE</topic><topic>ENVEJECIMIENTO</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>HERBICIDAS</topic><topic>HERBICIDE</topic><topic>Herbicides</topic><topic>HISTOLOGIA</topic><topic>HISTOLOGIE</topic><topic>Histology</topic><topic>MERISTEMAS</topic><topic>MERISTEME</topic><topic>METABOLISME</topic><topic>METABOLISMO</topic><topic>MITOSE</topic><topic>MITOSIS</topic><topic>Mitotic index</topic><topic>Parasitic plants. Weeds</topic><topic>Physiology, Chemistry and Biochemistry</topic><topic>Phytopathology. Animal pests. Plant and forest protection</topic><topic>Plant roots</topic><topic>Plants</topic><topic>RACINE</topic><topic>RAICES</topic><topic>Root growth</topic><topic>Root tips</topic><topic>Sorghum</topic><topic>SORGHUM BICOLOR</topic><topic>TUBIFLORAE</topic><topic>VACUOLA</topic><topic>VACUOLE</topic><topic>Vacuoles</topic><topic>VIEILLISSEMENT</topic><topic>Weeds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vaughn, Steven F.</creatorcontrib><creatorcontrib>Merkle, Morris G.</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Weed science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Vaughn, Steven F.</au><au>Merkle, Morris G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Histological and Cytological Effects of Haloxyfop on Sorghum (Sorghum bicolor) and Unicorn-Plant (Proboscidea louisianica) Root Meristems</atitle><jtitle>Weed science</jtitle><addtitle>Weed sci</addtitle><date>1989-07-01</date><risdate>1989</risdate><volume>37</volume><issue>4</issue><spage>503</spage><epage>511</epage><pages>503-511</pages><issn>0043-1745</issn><eissn>1550-2759</eissn><coden>WEESA6</coden><abstract>The effects of haloxyfop on elongation, mitotic index, and morphology of sorghum and unicorn-plant primary roots were examined. Elongation of sorghum roots was completely inhibited by haloxyfop concentrations of 10–6 M or greater 24 h after treatment, whereas unicorn-plant root elongation was unaffected by the same concentrations 72 h after treatment. Mitotic indices of sorghum roots were reduced by both 10–6 and 10–8 M haloxyfop, with the higher concentration reducing the index to near zero by 24 h of exposure. The mitotic indices of unicorn-plant roots were unaffected by the same levels of the herbicide after both 24- and 48-h treatment. Histological analyses showed that after 24 h exposure to 10–6 M haloxyfop, large vacuoles were present in cells at the root apex that normally did not exhibit these organelles. After 48 h of exposure many cells in the apical region appeared to lack visible cytoplasm and/or nuclei, and by 72 h only cell walls remained visibly evident, and many cells had collapsed. These changes are similar to those that occur in tissues undergoing senescence. Treatment of sorghum roots with 10–8 M haloxyfop did not cause discernible changes after 72 h. Unicorn-plant roots treated with 10–6 M haloxyfop appeared unaffected after 72 h.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/S0043174500072313</doi><tpages>9</tpages></addata></record> |
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subjects | ANATOMIA DE LA PLANTA ANATOMIE VEGETALE Biological and medical sciences Cell walls Chemical control CITOLOGIA CYTOLOGIE ENVEJECIMIENTO Fundamental and applied biological sciences. Psychology HERBICIDAS HERBICIDE Herbicides HISTOLOGIA HISTOLOGIE Histology MERISTEMAS MERISTEME METABOLISME METABOLISMO MITOSE MITOSIS Mitotic index Parasitic plants. Weeds Physiology, Chemistry and Biochemistry Phytopathology. Animal pests. Plant and forest protection Plant roots Plants RACINE RAICES Root growth Root tips Sorghum SORGHUM BICOLOR TUBIFLORAE VACUOLA VACUOLE Vacuoles VIEILLISSEMENT Weeds |
title | Histological and Cytological Effects of Haloxyfop on Sorghum (Sorghum bicolor) and Unicorn-Plant (Proboscidea louisianica) Root Meristems |
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