Early events of multiple bud formation and shoot development in soybean embryonic axes treated with the cytokinin, 6-benzylaminopurine
Early events of multiple bud formation and shoot development in germinating soybean embryonic axes treated for 24 hr with the cytokinin, 6-benzylaminopurine (BAP), were compared to the development of untreated control axes using four different techniques: photomicrography, scanning electron microsco...
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| Veröffentlicht in: | American journal of botany 1994-11, Vol.81 (11), p.1435-1448 |
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| creator | Buising, C.M. (Iowa State University, Ames, IA.) Shoemaker, R.C Benbow, R.M |
| description | Early events of multiple bud formation and shoot development in germinating soybean embryonic axes treated for 24 hr with the cytokinin, 6-benzylaminopurine (BAP), were compared to the development of untreated control axes using four different techniques: photomicrography, scanning electron microscopy, histology, and autoradiography. Shoot apex development in BAP-treated embryonic axes was delayed by about 9 to 15 hr. A transient inhibition of DNA synthesis in the primary apical meristem and axillary buds was observed with subsequent changes in the timing of cell division patterns in these regions. Meristematic regions (supernumerary vegetative buds) were observed in BAP-treated axes around the perimeter of the apical dome at and above the level of the axillary buds. Cells elongated from some of the BAP-induced meristematic regions to form four to six shoots. In the absence of BAP, excision of the primary apical meristem and/or axillary buds did not result in multiple bud formation. These results suggest that transient exposure to BAP interrupted chromosomal DNA replication and reprogrammed the developmental fate of a large number of cells in the shoot apex. We postulate that interruption of DNA synthesis, either directly, by interfering with DNA replication, or indirectly, by preventing entry into S-phase, effected redetermination of the shoot apex cells |
| doi_str_mv | 10.1002/j.1537-2197.1994.tb15630.x |
| format | Article |
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(Iowa State University, Ames, IA.) ; Shoemaker, R.C ; Benbow, R.M</creator><creatorcontrib>Buising, C.M. (Iowa State University, Ames, IA.) ; Shoemaker, R.C ; Benbow, R.M</creatorcontrib><description>Early events of multiple bud formation and shoot development in germinating soybean embryonic axes treated for 24 hr with the cytokinin, 6-benzylaminopurine (BAP), were compared to the development of untreated control axes using four different techniques: photomicrography, scanning electron microscopy, histology, and autoradiography. Shoot apex development in BAP-treated embryonic axes was delayed by about 9 to 15 hr. A transient inhibition of DNA synthesis in the primary apical meristem and axillary buds was observed with subsequent changes in the timing of cell division patterns in these regions. Meristematic regions (supernumerary vegetative buds) were observed in BAP-treated axes around the perimeter of the apical dome at and above the level of the axillary buds. Cells elongated from some of the BAP-induced meristematic regions to form four to six shoots. In the absence of BAP, excision of the primary apical meristem and/or axillary buds did not result in multiple bud formation. These results suggest that transient exposure to BAP interrupted chromosomal DNA replication and reprogrammed the developmental fate of a large number of cells in the shoot apex. We postulate that interruption of DNA synthesis, either directly, by interfering with DNA replication, or indirectly, by preventing entry into S-phase, effected redetermination of the shoot apex cells</description><identifier>ISSN: 0002-9122</identifier><identifier>EISSN: 1537-2197</identifier><identifier>DOI: 10.1002/j.1537-2197.1994.tb15630.x</identifier><identifier>CODEN: AJBOAA</identifier><language>eng</language><publisher>Columbus: American Botanical Society</publisher><subject>6-BENZILADENINA ; 6-BENZYLADENINE ; ANATOMIA DE LA PLANTA ; ANATOMIE VEGETALE ; Apical meristems ; Biology ; Botany ; BOURGEON ; Cell cycle ; Cell division ; Cytokinins ; DESARROLLO BIOLOGICO ; DEVELOPPEMENT BIOLOGIQUE ; DNA ; DNA replication ; EMBRIONES VEGETALES ; EMBRYON VEGETAL ; ETAPAS DE DESARROLLO DE LA PLANTA ; GLYCINE MAX ; Imbibition ; Leaves ; Plant reproduction ; Plants ; Soybeans ; STADE DE DEVELOPPEMENT VEGETAL ; Structure and Development ; TALLO ; TIGE ; ULTRAESTRUCTURA ; ULTRASTRUCTURE ; VARIACION GENETICA ; VARIATION GENETIQUE ; VARIEDADES ; VARIETE ; YEMA (PLANTA)</subject><ispartof>American journal of botany, 1994-11, Vol.81 (11), p.1435-1448</ispartof><rights>Copyright 1994 Botanical Society of America, Inc.</rights><rights>1994 Botanical Society of America</rights><rights>Copyright Botanical Society of America, Inc. 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(Iowa State University, Ames, IA.)</creatorcontrib><creatorcontrib>Shoemaker, R.C</creatorcontrib><creatorcontrib>Benbow, R.M</creatorcontrib><title>Early events of multiple bud formation and shoot development in soybean embryonic axes treated with the cytokinin, 6-benzylaminopurine</title><title>American journal of botany</title><description>Early events of multiple bud formation and shoot development in germinating soybean embryonic axes treated for 24 hr with the cytokinin, 6-benzylaminopurine (BAP), were compared to the development of untreated control axes using four different techniques: photomicrography, scanning electron microscopy, histology, and autoradiography. Shoot apex development in BAP-treated embryonic axes was delayed by about 9 to 15 hr. A transient inhibition of DNA synthesis in the primary apical meristem and axillary buds was observed with subsequent changes in the timing of cell division patterns in these regions. Meristematic regions (supernumerary vegetative buds) were observed in BAP-treated axes around the perimeter of the apical dome at and above the level of the axillary buds. Cells elongated from some of the BAP-induced meristematic regions to form four to six shoots. In the absence of BAP, excision of the primary apical meristem and/or axillary buds did not result in multiple bud formation. These results suggest that transient exposure to BAP interrupted chromosomal DNA replication and reprogrammed the developmental fate of a large number of cells in the shoot apex. We postulate that interruption of DNA synthesis, either directly, by interfering with DNA replication, or indirectly, by preventing entry into S-phase, effected redetermination of the shoot apex cells</description><subject>6-BENZILADENINA</subject><subject>6-BENZYLADENINE</subject><subject>ANATOMIA DE LA PLANTA</subject><subject>ANATOMIE VEGETALE</subject><subject>Apical meristems</subject><subject>Biology</subject><subject>Botany</subject><subject>BOURGEON</subject><subject>Cell cycle</subject><subject>Cell division</subject><subject>Cytokinins</subject><subject>DESARROLLO BIOLOGICO</subject><subject>DEVELOPPEMENT BIOLOGIQUE</subject><subject>DNA</subject><subject>DNA replication</subject><subject>EMBRIONES VEGETALES</subject><subject>EMBRYON VEGETAL</subject><subject>ETAPAS DE DESARROLLO DE LA PLANTA</subject><subject>GLYCINE MAX</subject><subject>Imbibition</subject><subject>Leaves</subject><subject>Plant reproduction</subject><subject>Plants</subject><subject>Soybeans</subject><subject>STADE DE DEVELOPPEMENT VEGETAL</subject><subject>Structure and Development</subject><subject>TALLO</subject><subject>TIGE</subject><subject>ULTRAESTRUCTURA</subject><subject>ULTRASTRUCTURE</subject><subject>VARIACION GENETICA</subject><subject>VARIATION GENETIQUE</subject><subject>VARIEDADES</subject><subject>VARIETE</subject><subject>YEMA (PLANTA)</subject><issn>0002-9122</issn><issn>1537-2197</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><recordid>eNqVkM1u1DAUhSMEEkPhBRALq2sSfG0nmbAbqvKnSiwoa8tObhiHxA62Qyc8AM-Nh1Td4821dc75rHuy7BJoAZSyN0MBJa9zBk1dQNOIImooK06L06Ns9yA9znY0ufMGGHuaPQthSM9GNGyX_blWflwJ_kIbA3E9mZYxmnlEopeO9M5PKhpnibIdCUfnIumSd3TzlALEWBLcqlFZgpP2q7OmJeqEgUSPKmJH7kw8knhE0q7R_TDW2NekyjXa3-uoJmPdvHhj8Xn2pFdjwBf38yK7fX99e_Uxv_ny4dPV4SZvOQWa1xUIDS12QpRlpcW-pbWADrBljFNVV1prRrUu91jyfcmgS0ekaMVr1SK_yC437OzdzwVDlINbvE0_SgblvmYAkExvN1PrXQgeezl7Mym_SqDy3Loc5Llaea5WnluX963LUwoftvCdGXH9j6Q8fH7H_t0T49XGGEJ0_oHB0tIc6iS_3OReOam-exPkt69NwnIQ_C9x8J6j</recordid><startdate>199411</startdate><enddate>199411</enddate><creator>Buising, C.M. 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(Iowa State University, Ames, IA.)</au><au>Shoemaker, R.C</au><au>Benbow, R.M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Early events of multiple bud formation and shoot development in soybean embryonic axes treated with the cytokinin, 6-benzylaminopurine</atitle><jtitle>American journal of botany</jtitle><date>1994-11</date><risdate>1994</risdate><volume>81</volume><issue>11</issue><spage>1435</spage><epage>1448</epage><pages>1435-1448</pages><issn>0002-9122</issn><eissn>1537-2197</eissn><coden>AJBOAA</coden><abstract>Early events of multiple bud formation and shoot development in germinating soybean embryonic axes treated for 24 hr with the cytokinin, 6-benzylaminopurine (BAP), were compared to the development of untreated control axes using four different techniques: photomicrography, scanning electron microscopy, histology, and autoradiography. Shoot apex development in BAP-treated embryonic axes was delayed by about 9 to 15 hr. A transient inhibition of DNA synthesis in the primary apical meristem and axillary buds was observed with subsequent changes in the timing of cell division patterns in these regions. Meristematic regions (supernumerary vegetative buds) were observed in BAP-treated axes around the perimeter of the apical dome at and above the level of the axillary buds. Cells elongated from some of the BAP-induced meristematic regions to form four to six shoots. In the absence of BAP, excision of the primary apical meristem and/or axillary buds did not result in multiple bud formation. These results suggest that transient exposure to BAP interrupted chromosomal DNA replication and reprogrammed the developmental fate of a large number of cells in the shoot apex. We postulate that interruption of DNA synthesis, either directly, by interfering with DNA replication, or indirectly, by preventing entry into S-phase, effected redetermination of the shoot apex cells</abstract><cop>Columbus</cop><pub>American Botanical Society</pub><doi>10.1002/j.1537-2197.1994.tb15630.x</doi><tpages>14</tpages></addata></record> |
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| ispartof | American journal of botany, 1994-11, Vol.81 (11), p.1435-1448 |
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| subjects | 6-BENZILADENINA 6-BENZYLADENINE ANATOMIA DE LA PLANTA ANATOMIE VEGETALE Apical meristems Biology Botany BOURGEON Cell cycle Cell division Cytokinins DESARROLLO BIOLOGICO DEVELOPPEMENT BIOLOGIQUE DNA DNA replication EMBRIONES VEGETALES EMBRYON VEGETAL ETAPAS DE DESARROLLO DE LA PLANTA GLYCINE MAX Imbibition Leaves Plant reproduction Plants Soybeans STADE DE DEVELOPPEMENT VEGETAL Structure and Development TALLO TIGE ULTRAESTRUCTURA ULTRASTRUCTURE VARIACION GENETICA VARIATION GENETIQUE VARIEDADES VARIETE YEMA (PLANTA) |
| title | Early events of multiple bud formation and shoot development in soybean embryonic axes treated with the cytokinin, 6-benzylaminopurine |
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