Seedlings: The viability of the seedlings is much reduced.
Cotyledones:
Hypocotyl:
Inflorescence:
Flowers: The flowers are completely white. Even the hairs inside the tube are white.
Due to the integration of a genetic element in the gene of chalcone
synthase the mutant is instable and shows red spots of revertant cell
lines.
Upper lip:
Lower lip:
Bumps:
Seed:
Roots:
Segregation: F2
Remarks: Plants are very susceptible against Pythium and Botrytis. niv+ is completely dominant over niv. there are white commercial lines called Antirrhinum majus niveum that carry this mutation.
wel_pict1.gif A picture of the
allele nivearecurrens
wel_slide0083.jpg Picture
provided by W.E. Lönnig. Nivrec-98 is grown on the
left at 15 degrees Celsius, on the right at 25 degrees Celsius. Date: 28.
August 1986.
wel_slide0084.jpg
Picture provided by W.E. Lönnig. Date: May 1988. Tam3 (line 165)
nivrec 98, grown at 25 degrees Celsius. Strangely enough
some revertants appeared at that temperature.
wel_slide0085.jpg
Picture provided by W.E. Lönnig. Date: May 1988. Tam3 (line 165)
nivrec 98, grown at 15 degrees Celsius. Strangely enough
some no revertants appeared at that temperature. Tam3 is normally
much
more active at 15 than at 25 degrees. So these results show in these cases
the reverse of the expectations.
(kst)
1996
This page is part of the
Snapdragon Home Page.
The URL of this page is
http://www.mpiz-koeln.mpg.de/snapdragon/mutants/niv.html
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For personal comments please write to the author(s) of this page or to
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This page has last been modified on May 13, 1997.
(kst)
1996
