Flower colour morphs of Iris pumila differ in the amounts of HSP90 and phenolic compounds
2013
Preuzimanje 🢃
Tip dokumenta:
Konferencijski prilog (Objavljena verzija)
,
© 2013 by the European Society for Evolutionary Biology
Metapodaci
Prikaz svih podataka o dokumentuApstrakt:
Natural populations of the dwarf bearded iris, Iris pumila, display a striking flower-colour
polymorphism. It was noted that the combination of fluctuating temperatures and the varied
attractiveness of diverse colour morphs promotes a stable coexistence of multiple colour variants in a
population. We have quantified the amounts of Hsp90 and the antioxidants, anthocyanins and total
phenolics, in I. pumila flowers. These molecules impact abiotic stress tolerance, ultimately influencing
the fitness of individual plants. A total of 100 clones that were raised in a common garden and assessed
to different colour classes (dark violet, violet, light violet, dark blue, light blue, yellow/white) were
examined. The amounts of two Hsp90 forms, inducible (Hsp90a) and constitutively expressed
(Hsp90b) proteins were lowest in yellow and white flowers as compared to other colour classes. In blue
flowers, the concentration of Hsp90a was observed to decrease gradually when proceeding from light
blue to dark blue variants, whereas an inverse trend was observed in violet-coloured flowers. The
concentration of anthocyanins was notably low in white/yellow flowers and in the blue and violet
colour classes it progressively increased from light to dark floral morphs. The amounts of total
phenolics were highest in the white and yellow colour morphs; they were relatively high in all of the
blue variants, and gradually increase from light to dark colour morphs in the violet class. These results
suggest that each I. pumila colour genotype is responsible for the production of unique amounts of
Hsp90 and phenolics that protect cellular homeostasis under fluctuating temperature conditions within
populations.
Finansiranje / projekti:
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200007 (Univerzitet u Beogradu, Institut za biološka istraživanja 'Siniša Stanković') (RS-MESTD-inst-2020-200007)
U:
- Abstract Book: 14th Congress of the European Society for Evolutionary Biology; 2013 Aug 19-24; Lisbon, Portugal. Basel: European Society for Evolutionary Biology; 2013. p. 810.