Abstract
Temperature modulates growth and development throughout the entire lifecycle of a plant. High temperature (HT) triggers the auxin biosynthesis-dependent growth in aerial tissues. On the other hand, the contribution of auxin to HT-induced root growth is currently under debate. Here we show that the putative intracellular auxin carrier PIN-LIKES 6 (PILS6) is a negative regulator of organ growth and that its abundance is highly sensitive to HT. PILS6 localizes to the endoplasmic reticulum and limits the nuclear availability of auxin, consequently reducing the auxin signaling output. HT represses the PILS6 protein abundance, which impacts on PILS6-dependent auxin signaling in roots and root expansion. Accordingly, we hypothesize that PILS6 is part of an alternative mechanism linking HT to auxin responses in roots.
Funder
Austrian Science Fund
European Molecular Biology Organization
EC | FP7 | FP7 Ideas: European Research Council
Vienna Science and Technology Fund
Publisher
Proceedings of the National Academy of Sciences
Reference32 articles.
1. Handling Arabidopsis plants: Growth, preservation of seeds, transformation, and genetic crosses;Rivero;Methods Mol Biol,2014
2. Genetic and epigenetic control of plant heat responses;Liu;Front Plant Sci,2015
3. Davies PJ (2010) The Plant Hormones: Their Nature, Occurrence, and Functions. Plant Hormones (Springer, Dordrecht), pp 1–15.
4. Shibasaki K Rahman A (2013) Auxin and temperature stress: Molecular and cellular perspectives. Polar Auxin Transport, eds Chen R Baluška F (Springer, Berlin), pp 295–310.
5. Ahammed GJ Li X Zhou J Zhou Y-H Yu J-Q (2016) Role of hormones in plant adaptation to heat stress. Plant Hormones Under Challenging Environmental Factors, eds Ahammed GJ Yu J-Q (Springer Netherlands, Dordrecht), pp 1–21.
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