Linked Life Data

14671014

Source:http://linkedlifedata.com/resource/pubmed/id/14671014

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2004-1-19
pubmed:abstractText
Borate ester cross-linking of the cell wall pectic polysaccharide rhamnogalacturonan II (RG-II) is required for the growth and development of angiosperms and gymnosperms. Here, we report that the amounts of borate cross-linked RG-II present in the sporophyte primary walls of members of the most primitive extant vascular plant groups (Lycopsida, Filicopsida, Equisetopsida, and Psilopsida) are comparable with the amounts of RG-II in the primary walls of angiosperms. By contrast, the gametophyte generation of members of the avascular bryophytes (Bryopsida, Hepaticopsida, and Anthocerotopsida) have primary walls that contain small amounts (approximately 1% of the amounts of RG-II present in angiosperm walls) of an RG-II-like polysaccharide. The glycosyl sequence of RG-II is conserved in vascular plants, but these RG-IIs are not identical because the non-reducing L-rhamnosyl residue present on the aceric acid-containing side chain of RG-II of all previously studied plants is replaced by a 3-O-methyl rhamnosyl residue in the RG-IIs isolated from Lycopodium tristachyum, Ceratopteris thalictroides, Platycerium bifurcatum, and Psilotum nudum. Our data indicate that the amount of RG-II incorporated into the walls of plants increased during the evolution of vascular plants from their bryophyte-like ancestors. Thus, the acquisition of a boron-dependent growth habit may be correlated with the ability of vascular plants to maintain upright growth and to form lignified secondary walls. The conserved structures of pteridophyte, lycophyte, and angiosperm RG-IIs suggests that the genes and proteins responsible for the biosynthesis of this polysaccharide appeared early in land plant evolution and that RG-II has a fundamental role in wall structure.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-10224062, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-10829033, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-10905613, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-11050325, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-11423142, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-11423143, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-11500567, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-11679668, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-12451175, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-12495914, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-1605832, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-2074842, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-4269305, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-7648580, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-8401598, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-8798473, http://linkedlifedata.com/resource/pubmed/commentcorrection/14671014-9842725
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0032-0889
pubmed:author
pubmed:issnType
Print
pubmed:volume
134
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
339-51
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Occurrence of the primary cell wall polysaccharide rhamnogalacturonan II in pteridophytes, lycophytes, and bryophytes. Implications for the evolution of vascular plants.
pubmed:affiliation
National Agricultural Research Center for Kyushu Okinawa Region, Nishigoshi, Kumamoto 861-1192, Japan.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't