Three sucrose transporter genes are expressed in the developing grain of hexaploid wheat

Three sucrose transporter genes are expressed in the developing grain of hexaploid wheat A family of three cDNAs, designated TaSUT1A, 1B and 1D, encoding sucrose transporter (SUT) proteins was isolated from a hexaploid wheat (Triticum aestivum) endosperm library. The cDNA sequences are 96% identical but are distinguishable from one another by virtue of a size polymorphism in the 3′-untranslated region (UTR). The predicted amino acid sequences are 98% identical and are highly similar to the sucrose transporters from rice, maize and barley. A gene for TaSUT1 was isolated from genomic libraries of Aegilops tauschii (the donor of the D genome of wheat) and the coding sequence found to be identical to that of TaSUT1D cDNA. There is only one copy of each TaSUT1 gene in hexaploid wheat and it is located on chromosome 4. Genomic Southern analysis and PCR analysis across the 3′ polymorphic region of hexaploid, tetraploid and progenitor diploid wheat DNAs established that the TaSUT1A gene was present in the putative A-genome progenitor, T. monococcum, and that the TaSUT1B gene was present in the putative B-genome progenitor, T. searsii. All three TaSUT1 genes are expressed at high levels in filling grain, showing a good correlation with the developmental time course of growth. This reinforces the view that in cereals a major role of SUT1 is in the post-phloem sugar transport pathway associated with seed filling. Plant Molecular Biology Springer Journals

Three sucrose transporter genes are expressed in the developing grain of hexaploid wheat

Loading next page...
Kluwer Academic Publishers
Copyright © 2002 by Kluwer Academic Publishers
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

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.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial