Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 24 November 2006:
Vol. 314. no. 5803, pp. 1298 - 1301
DOI: 10.1126/science.1133649
Prev | Table of Contents | Next

Reports

A NAC Gene Regulating Senescence Improves Grain Protein, Zinc, and Iron Content in Wheat

Cristobal Uauy,1* Assaf Distelfeld,2* Tzion Fahima,2 Ann Blechl,3 Jorge Dubcovsky1{dagger}

Enhancing the nutritional value of food crops is a means of improving human nutrition and health. We report here the positional cloning of Gpc-B1, a wheat quantitative trait locus associated with increased grain protein, zinc, and iron content. The ancestral wild wheat allele encodes a NAC transcription factor (NAM-B1) that accelerates senescence and increases nutrient remobilization from leaves to developing grains, whereas modern wheat varieties carry a nonfunctional NAM-B1 allele. Reduction in RNA levels of the multiple NAM homologs by RNA interference delayed senescence by more than 3 weeks and reduced wheat grain protein, zinc, and iron content by more than 30%.

1 Department of Plant Sciences, University of California, One Shields Avenue, Davis, CA 95616, USA.
2 Institute of Evolution, University of Haifa, Mt. Carmel, Haifa 31905, Israel.
3 United States Department of Agriculture, Agricultural Research Service, Western Regional Research Center, 800 Buchanan St., Albany, CA 94710, USA.

* These authors contributed equally to this work.

{dagger} To whom correspondence should be addressed. E-mail: jdubcovsky{at}ucdavis.edu

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
A Novel NAC Transcription Factor, IDEF2, That Recognizes the Iron Deficiency-responsive Element 2 Regulates the Genes Involved in Iron Homeostasis in Plants.
Y. Ogo, T. Kobayashi, R. Nakanishi Itai, H. Nakanishi, Y. Kakei, M. Takahashi, S. Toki, S. Mori, and N. K. Nishizawa (2008)
J. Biol. Chem. 283, 13407-13417
   Abstract »    Full Text »    PDF »
Registration of Near-Isogenic Hard-Textured Wheat Lines Differing for Presence of a High Grain Protein Gene.
J. D. Sherman, S. P. Lanning, D. Clark, and L. E. Talbert (2008)
Journal of Plant Registrations 2, 162-164
   Abstract »    Full Text »    PDF »
Identification of variation in adaptively important traits and genome-wide analysis of trait marker associations in Triticum monococcum.
H.-C. Jing, D. Kornyukhin, K. Kanyuka, S. Orford, A. Zlatska, O. P. Mitrofanova, R. Koebner, and K. Hammond-Kosack (2007)
J. Exp. Bot. 58, 3749-3764
   Abstract »    Full Text »    PDF »
Senescence-associated genes induced during compatible viral interactions with grapevine and Arabidopsis.
C Espinoza, C Medina, S Somerville, and P Arce-Johnson (2007)
J. Exp. Bot.
   Abstract »    Full Text »    PDF »
Genome Plasticity a Key Factor in the Success of Polyploid Wheat Under Domestication.
J. Dubcovsky and J. Dvorak (2007)
Science 316, 1862-1866
   Abstract »    Full Text »    PDF »
Colloquium Papers: Plant domestication, a unique opportunity to identify the genetic basis of adaptation.
J. Ross-Ibarra, P. L. Morrell, and B. S. Gaut (2007)
PNAS 104, 8641-8648
   Abstract »    Full Text »    PDF »


ADVERTISEMENT
Click Me!

ADVERTISEMENT
Click Me!

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)