possible role of PnACS2 in IAA-mediated flower inhibition in Pharbitis nil

In this work we studied interactions between auxin and ethylene in the inhibition of photoperiodic flower induction in SDP Pharbitis nil. To this end, PnACS2 was cloned and its expression was studied under various photoperiodic conditions, as well as under the influence of auxin. The full-length PnA...

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Published inPlant growth regulation Vol. 61; no. 1; pp. 1 - 10
Main Authors Kęsy, Jacek, Frankowski, Kamil, Wilmowicz, Emilia, Glazińska, Paulina, Wojciechowski, Waldemar, Kopcewicz, Jan
Format Journal Article
LanguageEnglish
Published Dordrecht Dordrecht : Springer Netherlands 01.05.2010
Springer Netherlands
Springer Nature B.V
Subjects
Agriculture
Amino acids
Biomedical and Life Sciences
Flowers
Life Sciences
Original Paper
Plant Anatomy/Development
Plant Physiology
Plant Sciences
Seedlings
(
Flowering
)
Auxin
ACC synthase
Ethylene
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Summary:In this work we studied interactions between auxin and ethylene in the inhibition of photoperiodic flower induction in SDP Pharbitis nil. To this end, PnACS2 was cloned and its expression was studied under various photoperiodic conditions, as well as under the influence of auxin. The full-length PnACS2 cDNA consists of 1,841 bp and encodes for 472 amino acids, with the 80-bp 5′- and the 417-bp 3′-untranslated regions. It was shown that the gene is transcribed in all organs of 5-day-old seedlings and that it is strongly activated by auxin. The maximal transcriptional activity of PnACS2 and the strongest stimulation of its activity by IAA occur in the cotyledons. This confirms the speculation that the inhibitory effect of auxin on P. nil flowering results from its stimulatory effect on ethylene production.
Bibliography:http://dx.doi.org/10.1007/s10725-010-9443-3
ISSN:0167-6903
1573-5087
DOI:10.1007/s10725-010-9443-3