Auxin boosts energy generation pathways to fuel pollen maturation in barley. Amanda, D., Frey, F. P., Neumann, U., Przybyl, M., Šimura, J., Zhang, Y., Chen, Z., Gallavotti, A., Fernie, A. R., Ljung, K., & Acosta, I. F. Current Biology, 32(8):1798–1811.e8, April, 2022. ![Auxin boosts energy generation pathways to fuel pollen maturation in barley [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex 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.
@article{amanda_auxin_2022,
title = {Auxin boosts energy generation pathways to fuel pollen maturation in barley},
volume = {32},
issn = {0960-9822},
url = {https://www.sciencedirect.com/science/article/pii/S0960982222003438},
doi = {10.1016/j.cub.2022.02.073},
abstract = {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.},
language = {en},
number = {8},
urldate = {2022-05-06},
journal = {Current Biology},
author = {Amanda, Dhika and Frey, Felix P. and Neumann, Ulla and Przybyl, Marine and Šimura, Jan and Zhang, Youjun and Chen, Zongliang and Gallavotti, Andrea and Fernie, Alisdair R. and Ljung, Karin and Acosta, Iván F.},
month = apr,
year = {2022},
keywords = {anther, auxin, barley, metabolism, plant male fertility, pollen, stamen maturation, starch},
pages = {1798--1811.e8},
}
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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. 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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. 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