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Search: L773:1040 4651 > (2010-2014) > Cytokinin regulatio...

  • Jones, BrianUmeå universitet,Umeå Plant Science Centre (UPSC) (author)

Cytokinin regulation of auxin synthesis in Arabidopsis involves a homeostatic feedback loop regulated via auxin and cytokinin signal transduction.

  • Article/chapterEnglish2010

Publisher, publication year, extent ...

  • 2010-09-07
  • American Society of Plant Biologists,2010
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:umu-39396
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-39396URI
  • https://doi.org/10.1105/tpc.110.074856DOI
  • https://res.slu.se/id/publ/32003URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Together, auxin and cytokinin regulate many of the processes that are critical to plant growth, development, and environmental responsiveness. We have previously shown that exogenous auxin regulates cytokinin biosynthesis in Arabidopsis thaliana. In this work, we show that, conversely, the application or induced ectopic biosynthesis of cytokinin leads to a rapid increase in auxin biosynthesis in young, developing root and shoot tissues. We also show that reducing endogenous cytokinin levels, either through the induction of CYTOKININ OXIDASE expression or the mutation of one or more of the cytokinin biosynthetic ISOPENTENYLTRANSFERASE genes leads to a reduction in auxin biosynthesis. Cytokinin modifies the abundance of transcripts for several putative auxin biosynthetic genes, suggesting a direct induction of auxin biosynthesis by cytokinin. Our data indicate that cytokinin is essential, not only to maintain basal levels of auxin biosynthesis in developing root and shoot tissues but also for the dynamic regulation of auxin biosynthesis in response to changing developmental or environmental conditions. In combination with our previous work, the data suggest that a homeostatic feedback regulatory loop involving both auxin and cytokinin signaling acts to maintain appropriate auxin and cytokinin concentrations in developing root and shoot tissues.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Petersson, SaraSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology(Swepub:slu)50254 (author)
  • Petersson, Sara V (author)
  • Tarkowski, Petr (author)
  • Graham, Neil (author)
  • May, Sean (author)
  • Dolezal, KarelSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology(Swepub:slu)51671 (author)
  • Sandberg, GöranSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC),Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology(Swepub:slu)51425 (author)
  • Ljung, KarinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Umeå Plant Science Centre (UPSC),Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology(Swepub:slu)48434 (author)
  • Umeå universitetUmeå Plant Science Centre (UPSC) (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:The Plant Cell: American Society of Plant Biologists22:9, s. 2956-29691040-46511532-298X

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