<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Pintos, B.</style></author><author><style face="normal" font="default" size="100%">Manzanera, J. A.</style></author><author><style face="normal" font="default" size="100%">Bueno, M. A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Cytological analysis of early microspore divisions leading to gametic embryo formation in Quercus suber L. anther cultures</style></title><secondary-title><style face="normal" font="default" size="100%">Acta Physiologiae Plantarum</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">anther culture</style></keyword><keyword><style  face="normal" font="default" size="100%">Cork oak</style></keyword><keyword><style  face="normal" font="default" size="100%">microspore embryogenesis</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus suber</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2005</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2005///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/index/T8PG4134752511RN.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">27</style></volume><pages><style face="normal" font="default" size="100%">703 - 708</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The cor re la tion be tween the phenologic stage of the in flo res - cence and the microspore de vel op ment stage was stud ied. Cyto log i cal ex am i na tions of the de vel op ment of micro spores dur - ing in vi tro an ther cul ture of cork oak (Quercus suber L.), were car ried out dur ing the first four weeks of cul ture. To ob serve the di vi sion oc cur ring in the micro spores, an thers were taken ran domly from the cultures after heat shock treatment and were stained with DAPI. Most of the an thers re spond ing to a heat stress treat ment con tained 91 % vacuolated micro spores, in di cat ing that this de vel op men tal stage is re spon sive to embryo genesis in duc tion in cork-oak micro spores. Af ter the heat shock treat ment some cork-oak micro spores were in duced and ini ti ated the embryogenic path way with the oc cur rence of nu mer ous sym met ric mi to sis, pro duc ing struc tures with two to ten or more nu clei. These lead to the for ma tion of high num - bers of multicellular cork-oak micro spores (pro-em bryos). Twenty-forty days af ter in duc tion, small white glob u lar and cotyledonal em bryos were ob served, which fur ther de vel oped root and shoot, re gen er at ing plantlets.</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Pintos, B</style></author><author><style face="normal" font="default" size="100%">Manzanera, J A</style></author><author><style face="normal" font="default" size="100%">Bueno, M A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Cytological analysis of early microspore divisions leading to gametic embryo formation in Quercus suber L. anther cultures</style></title><secondary-title><style face="normal" font="default" size="100%">Acta Physiologiae Plantarum</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">anther culture</style></keyword><keyword><style  face="normal" font="default" size="100%">Cork oak</style></keyword><keyword><style  face="normal" font="default" size="100%">microspore embryogenesis</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus suber</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2005</style></year></dates><volume><style face="normal" font="default" size="100%">27</style></volume><pages><style face="normal" font="default" size="100%">703-708</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The cor re la tion be tween the phenologic stage of the in flo res - cence and the microspore de vel op ment stage was stud ied. Cyto log i cal ex am i na tions of the de vel op ment of micro spores dur - ing in vi tro an ther cul ture of cork oak (Quercus suber L.), were car ried out dur ing the first four weeks of cul ture. To ob serve the di vi sion oc cur ring in the micro spores, an thers were taken ran domly from the cultures after heat shock treatment and were stained with DAPI. Most of the an thers re spond ing to a heat stress treat ment con tained 91 % vacuolated micro spores, in di cat ing that this de vel op men tal stage is re spon sive to embryo genesis in duc tion in cork-oak micro spores. Af ter the heat shock treat ment some cork-oak micro spores were in duced and ini ti ated the embryogenic path way with the oc cur rence of nu mer ous sym met ric mi to sis, pro duc ing struc tures with two to ten or more nu clei. These lead to the for ma tion of high num - bers of multicellular cork-oak micro spores (pro-em bryos). Twenty-forty days af ter in duc tion, small white glob u lar and cotyledonal em bryos were ob served, which fur ther de vel oped root and shoot, re gen er at ing plantlets.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ramírez, Carmen</style></author><author><style face="normal" font="default" size="100%">Testillano, Pilar S</style></author><author><style face="normal" font="default" size="100%">Pintos, Beatriz</style></author><author><style face="normal" font="default" size="100%">Moreno-Risueño, Miguel a</style></author><author><style face="normal" font="default" size="100%">Bueno, María a</style></author><author><style face="normal" font="default" size="100%">Risueño, María C</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Changes in pectins and MAPKs related to cell development during early microspore embryogenesis in Quercus suber L.</style></title><secondary-title><style face="normal" font="default" size="100%">European journal of cell biology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Cell Differentiation</style></keyword><keyword><style  face="normal" font="default" size="100%">Cell Differentiation: physiology</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron</style></keyword><keyword><style  face="normal" font="default" size="100%">MAPKs</style></keyword><keyword><style  face="normal" font="default" size="100%">Microscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">microspore embryogenesis</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 1</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 1: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 3</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 3: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinases</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinases: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Pectins</style></keyword><keyword><style  face="normal" font="default" size="100%">Pectins: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Proliferation</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus: embryology</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus: enzymology</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Seeds</style></keyword><keyword><style  face="normal" font="default" size="100%">Seeds: cytology</style></keyword><keyword><style  face="normal" font="default" size="100%">Seeds: ultrastructure</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><volume><style face="normal" font="default" size="100%">83</style></volume><pages><style face="normal" font="default" size="100%">213-225</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The occurrence and significance of changes in cell wall components and signalling molecules has been investigated during early microspore embryogenesis in cork oak (Quercus suber L.) in relation to cell proliferation and cell differentiation. Microspore embryogenesis has been induced in in vitro anther cultures of Q. suber by the application of a stress treatment of 33 degrees C. After the treatment, microspores at the responsive developmental stage of vacuolate microspore switched towards proliferation and the embryogenesis pathway to further produce haploid plantlets. Ultrastructural and immunocytochemical analysis revealed changes in cell organisation after induction at different developmental stages, the cellular features displayed being in relation to the activation of proliferative activity and the beginning of differentiation in young and late proembryos. Immunogold labelling with JIM5 and JIM7 antibodies showed a different presence of pectin and level of its esterification in cell walls at different developmental stages. Non-esterified pectins were found in higher proportions in cells of late proembryos, suggesting that pectin de-esterification could be related to the beginning of differentiation. The presence and subcellular distribution of Erk 1/2 MAPK homologues have been investigated by immunoblotting, immunofluorescence and immunogold labelling. The results showed an increase in the expression of these proteins with a high presence in the nucleus, during early microspore proembryos development. The reported changes during early microspore embryogenesis are modulated in relation to proliferation and differentiation events. These findings provided new evidences for a role of MAPK signalling pathways in early microspore embryogenesis, specifically in proliferation, and would confer information for the cell fate and the direction of the cell development.</style></abstract><accession-num><style face="normal" font="default" size="100%">15346811</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ramírez, Carmen</style></author><author><style face="normal" font="default" size="100%">Testillano, Pilar S.</style></author><author><style face="normal" font="default" size="100%">Pintos, Beatriz</style></author><author><style face="normal" font="default" size="100%">Moreno-Risueño, Miguel a</style></author><author><style face="normal" font="default" size="100%">Bueno, María a</style></author><author><style face="normal" font="default" size="100%">Risueño, María C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Changes in pectins and MAPKs related to cell development during early microspore embryogenesis in Quercus suber L.</style></title><secondary-title><style face="normal" font="default" size="100%">European journal of cell biology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Cell Differentiation</style></keyword><keyword><style  face="normal" font="default" size="100%">Cell Differentiation: physiology</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron</style></keyword><keyword><style  face="normal" font="default" size="100%">MAPKs</style></keyword><keyword><style  face="normal" font="default" size="100%">Microscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">microspore embryogenesis</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 1</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 1: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 3</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinase 3: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinases</style></keyword><keyword><style  face="normal" font="default" size="100%">Mitogen-Activated Protein Kinases: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Pectins</style></keyword><keyword><style  face="normal" font="default" size="100%">Pectins: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Proliferation</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus: embryology</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus: enzymology</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus: metabolism</style></keyword><keyword><style  face="normal" font="default" size="100%">Seeds</style></keyword><keyword><style  face="normal" font="default" size="100%">Seeds: cytology</style></keyword><keyword><style  face="normal" font="default" size="100%">Seeds: ultrastructure</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2004///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/15346811</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">83</style></volume><pages><style face="normal" font="default" size="100%">213 - 225</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The occurrence and significance of changes in cell wall components and signalling molecules has been investigated during early microspore embryogenesis in cork oak (Quercus suber L.) in relation to cell proliferation and cell differentiation. Microspore embryogenesis has been induced in in vitro anther cultures of Q. suber by the application of a stress treatment of 33 degrees C. After the treatment, microspores at the responsive developmental stage of vacuolate microspore switched towards proliferation and the embryogenesis pathway to further produce haploid plantlets. Ultrastructural and immunocytochemical analysis revealed changes in cell organisation after induction at different developmental stages, the cellular features displayed being in relation to the activation of proliferative activity and the beginning of differentiation in young and late proembryos. Immunogold labelling with JIM5 and JIM7 antibodies showed a different presence of pectin and level of its esterification in cell walls at different developmental stages. Non-esterified pectins were found in higher proportions in cells of late proembryos, suggesting that pectin de-esterification could be related to the beginning of differentiation. The presence and subcellular distribution of Erk 1/2 MAPK homologues have been investigated by immunoblotting, immunofluorescence and immunogold labelling. The results showed an increase in the expression of these proteins with a high presence in the nucleus, during early microspore proembryos development. The reported changes during early microspore embryogenesis are modulated in relation to proliferation and differentiation events. These findings provided new evidences for a role of MAPK signalling pathways in early microspore embryogenesis, specifically in proliferation, and would confer information for the cell fate and the direction of the cell development.</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;accession-num: 15346811</style></notes></record></records></xml>