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'Paul Grampel' rose Reviews & Comments
Discussion id : 79-959
most recent 16 AUG 14 HIDE POSTS
 
Initial post 16 AUG 14 by CybeRose
Journal of Genetics, 1936: p 149
A Biochemical Survey of Factors for Flower Colour
Rose Scott-Montcrieff

Rosa polyantha: An interesting spray of flowers from a sporting Polyantha Rose ("Paul Krampel") was recently sent by Mr R. E. Cooper of the Royal Botanic Garden, Edinburgh. While the normal flowers were scarlet two distinct mutations had occurred; one to crimson and the other to a dog-rose pink.

A chemical examination of the pigments involved showed that the normal scarlet flowers were deeply pigmented with pelargonin and some flavone, while in the two sports cyanin took the place of pelargonin, the pale pink flowers having a smaller amount of anthocyanin than either the scarlet or crimson flowers, together with a proportional increase in flavone content. All three types of flowers contained large amounts of tannin.

The mutation from scarlet to crimson thus involves a change in pigment to a more oxidized anthocyanin with a similar 3-5-dimonosidic residue, while the change from scarlet to pink appears also to involve co-pigmentation and a change in the anthocyanin-flavone balance, and is apparently due to a double mutation.
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Discussion id : 34-669
most recent 16 AUG 14 SHOW ALL
 
Initial post 11 MAR 09 by Jeff Britt
I heard this is the first rose found whose flowers contain the pigment pelargondin -- the source of brilliant orange-red in modern roses. I don't know if this is true or whether it is relevant to the development of modern red and orange/red floribundas. Surely there is some expert here who might know?
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Reply #1 of 1 posted 16 AUG 14 by CybeRose
Pelargonin turned up in several Dwarf Polyanthas and their descendants. 'Eva' (grandchild of Miss Edith Cavell) shows no obvious trace of the pigment (it may be masked), but 'Baby Chateau', descended from 'Eva', contributed greatly to the modern orange-toned roses.

Tantau raised three seedlings from Baby Chateau x Rosa roxburghii: Floradora, Cinnabar and K├Ąthe Duvigneau. One or two of these are found in the ancestry of Tropicana and Queen Elizabeth.

Kordes' Sondermeldung (Independence) was raised from Baby Chateau x Crimson Glory (F2).

Karl King
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Discussion id : 25-923
most recent 2 MAY 08 HIDE POSTS
 
Initial post 1 MAY 08 by mar
Foliage: demi-matte, light green
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Reply #1 of 1 posted 2 MAY 08 by Cass
Thanks!
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