Plant growth factor

Details Plant growth factor Plant growth factor

1999-08-16

2003-02-04

Moezie, F. T. (Department: 1653)

Chemistry: molecular biology and microbiology

Plant cell or cell line, per se ; composition thereof;...

C435S431000, C530S330000, C530S344000

Reexamination Certificate

active

06514759

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to peptides having the properties of a plant growth factor.
BACKGROUND OF THE INVENTION
The following plant-derived plant growth factors are known: barley-derived, fat-soluble fatty acid having a molecular weight of 600 or less (Journal of Plant Physiology, Vol. 121, pp. 181-191, 1985); pine-derived growth factor consisting of oligosaccharides having a molecular weight of 1000 or less (Plant Cell, Tissue and Organ Culture, Vol. 26, pp. 53-59, 1991); carrot-derived, heat-stable growth factor having a molecular weight of about 700 (Plant Science, Vol. 51, pp. 83-91, 1987); and black Mexican maize-derived growth factor which has a molecular weight of 1350 or less, oligosaccharide-like characteristics, and is not adsorbed to either of anion-exchange resin or cation-exchange resin in a buffer at pH of 5 (Journal of Plant Physiology, Vol. 132, pp. 316-321, 1988).
It is difficult to isolate and purify such known plant-derived plant growth factors, and there is no known technique for mass-production of these factors. In order to effectively use a plant growth factor as a plant cell growth promoter, it must be mass-producible.
SUMMARY OF THE INVENTION
The present invention relates to peptides having the properties of a plant growth factor and of the formula
wherein R
1
and R
2
are the same or different and each represents SO
3
H or H; X represents an &agr;-amino acid or a single bond; Z
1
and Z
2
are the same or different and each represents an &agr;-amino acid; and Y represents OH or NH
2
. This peptide has plant growth factor properties.


REFERENCES:
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