Brassinosteroids (BRs) are steroid hormones that are essential for plant growth and development. To gain insight into potential sites of BR synthesis, we studied promoter activities of the two Arabidopsis BR C-6 oxidase genes (CYP85A1 and CYP85A2) in transgenic plants carrying promoter fusions with the GUS, GFP or LUC reporter genes. BR-dependent feedback regulation of the GUS reporter constructs indicated that their expression corresponded to those of the native genes. Both the CYP85A1 and CYP85A2 promoters showed maximum activity during the first week following germination, particularly in the vascular tissues. Compared to CYP85A2, CYP85A1 expression was weaker and confined to the early stages of seedling development. Stronger CYP85A2 promoter activity was evident in both juvenile and adult plants. Comparison of the 5′-UTR and TATA box sequences of CYP85A1 and CYP85A2 revealed high homology, indicating a relatively recent gene duplication. We also found that transgenic Arabidopsis plants harbouring the tomato DWARF promoter-GUS fusion had similarities in the expression pattern to the Arabidopsis genes suggesting common transcriptional regulation of CYP85 genes in the two species.
Plant Molecular Biology – Springer Journals
Published: Nov 29, 2004
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera