ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Lignin content and composition of rose flower peduncles differing by their resistance to bending.

Chabbert, B.; Monties, B.; Zieslin, N.; Ban-Zaken, R.;

Plant Physiology and Biochemistry (Paris) Year: 1993 Vol: 31 Issue: 2 Pages: 241-247 Ref: 35 ref.

1993

บทคัดย่อ

The tendency of rose peduncles to bend is one of the determinant characteristics of the postharvest quality of cut rose flowers. The extent of lignification on rose cultivars with strong or weak resistance to bending (cultivars Mercedes and Nubia, respectively) was studied. Xylem tissues from strong peduncles were up to 20% more lignified than those from weak peduncles; a higher lignin content was also found in the basal, strongest, part of the peduncle. Lignin content in the phloem fraction did not vary markedly. Lignin from both phloem and xylem fractions of cv. Mercedes appeared particularly as a less condensed polymer than that from cv. Nubia. Furthermore, lignin fractions enriched in syringyl residues occurred in the stronger peduncles, especially in the distal parts, indicating a tissue specific lignification pattern. Lignification was also affected by the stage of flower bud development. Likewise, increased lignin content and uncondensed structure occurred in aged peduncles. The variation

s observed in content and composition of lignin in these strong and weak cultivars indicate that lignin could be involved in the resistance of these cultivars to bending.