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  Auxin boosts energy generation pathways to fuel pollen maturation in barley

Amanda, D., Frey, F. P., Neumann, U., Przybyl, M., Šimura, J., Zhang, Y., et al. (2022). Auxin boosts energy generation pathways to fuel pollen maturation in barley. Current Biology, 32(8), 1798-1811. doi:10.1016/j.cub.2022.02.073.

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 Creators:
Amanda, Dhika1, Author
Frey, Felix P.1, Author
Neumann, Ulla1, Author
Przybyl, Marine1, Author
Šimura, Jan1, Author
Zhang, YJ2, Author              
Chen, Zongliang1, Author
Gallavotti, Andrea1, Author
Fernie, A. R.2, Author              
Ljung, Karin1, Author
Acosta, Iván F.1, Author
Affiliations:
1external, ou_persistent22              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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Free keywords: pollen, auxin, metabolism, starch, barley, anther, stamen maturation, plant male fertility
 Abstract: Summary Pollen grains become increasingly independent of the mother plant as they reach maturity through poorly understood developmental programs. We report that the hormone auxin is essential during barley pollen maturation to boost the expression of genes encoding almost every step of heterotrophic energy production pathways. Accordingly, auxin is necessary for the flux of sucrose and hexoses into glycolysis and to increase the levels of pyruvate and two tricarboxylic (TCA) cycle metabolites (citrate and succinate). Moreover, bioactive auxin is synthesized by the pollen-localized enzyme HvYUCCA4, supporting that pollen grains autonomously produce auxin to stimulate a specific cellular output, energy generation, that fuels maturation processes such as starch accumulation. Our results demonstrate that auxin can shift central carbon metabolism to drive plant cell development, which suggests a direct mechanism for auxin’s ability to promote growth and differentiation.

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Language(s): eng - English
 Dates: 2022-03-212022-04-25
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.cub.2022.02.073
 Degree: -

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Title: Current Biology
  Abbreviation : Curr. Biol.
Source Genre: Journal
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Publ. Info: London, UK : Cell Press
Pages: - Volume / Issue: 32 (8) Sequence Number: - Start / End Page: 1798 - 1811 Identifier: ISSN: 0960-9822
CoNE: https://pure.mpg.de/cone/journals/resource/954925579107