Formation of rhamnogalacturonan II-borate dimer in pectin determines cell wall thickness of pumpkin tissue.
Plant Physiol
; 126(4): 1698-705, 2001 Aug.
Article
em En
| MEDLINE
| ID: mdl-11500567
ABSTRACT
Boron (B) deficiency results in inhibition of pumpkin (Cucurbia moschata Duchesne) growth that is accompanied by swelling of the cell walls. Monomeric rhamnogalacturonan II (mRG-II) accounted for 80% to 90% of the total RG-II in B-deficient walls, whereas the borate ester cross-linked RG-II dimer (dRG-II-B) accounted for more than 80% of the RG-II in control plants. The results of glycosyl residue and glycosyl linkage composition analyses of the RG-II from control and B-deficient plants were similar. Thus, B deficiency does not alter the primary structure of RG-II. The addition of (10)B-enriched boric acid to B-deficient plants resulted within 5 h in the conversion of mRG-II to dRG-II-(10)B. The wall thickness of the (10)B-treated plants and control plants was similar. The formation and possible functions of a borate ester cross-linked RG-II in the cell walls are discussed.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Boro
/
Pectinas
/
Cucurbitaceae
Idioma:
En
Revista:
Plant Physiol
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Japão