A Robust Auxin Response Network Controls Embryo and Suspensor Development through a Basic Helix Loop Helix Transcriptional Module.

Autor:	Radoeva T; Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands., Lokerse AS; Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands., Llavata-Peris CI; Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands., Wendrich JR; Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands., Xiang D; Plant Biotechnology Institute, National Research Council, 110 Gymnasium Place, Saskatoon, Saskatchewan, Canada S7N 0W9., Liao CY; Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands., Vlaar L; Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands., Boekschoten M; Division of Human Nutrition, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands.; Top Institute Food & Nutrition, Nieuwe Kanaal 9A, 6709 PA Wageningen, the Netherlands., Hooiveld G; Division of Human Nutrition, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands., Datla R; Plant Biotechnology Institute, National Research Council, 110 Gymnasium Place, Saskatoon, Saskatchewan, Canada S7N 0W9., Weijers D; Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708WE Wageningen, the Netherlands.
Jazyk:	angličtina
Zdroj:	The Plant cell [Plant Cell] 2019 Jan; Vol. 31 (1), pp. 52-67. Date of Electronic Publication: 2018 Dec 20.
DOI:	10.1105/tpc.18.00518
Abstrakt:	Land plants reproduce sexually by developing an embryo from a fertilized egg cell. However, embryos can also be formed from other cell types in many plant species. Thus, a key question is how embryo identity in plants is controlled, and how this process is modified during nonzygotic embryogenesis. The Arabidopsis ( Arabidopsis thaliana ) zygote divides to produce an embryonic lineage and an extra-embryonic suspensor. Yet, normally quiescent suspensor cells can develop a second embryo when the initial embryo is damaged, or when response to the signaling molecule auxin is locally blocked. Here we used auxin-dependent suspensor embryogenesis as a model to determine transcriptome changes during embryonic reprogramming. We found that reprogramming is complex and accompanied by large transcriptomic changes before anatomical changes. This analysis revealed a strong enrichment for genes encoding components of auxin homeostasis and response among misregulated genes. Strikingly, deregulation among multiple auxin-related gene families converged upon the re-establishment of cellular auxin levels or response. This finding points to a remarkable degree of feedback regulation to create resilience in the auxin response during embryo development. Starting from the transcriptome of auxin-deregulated embryos, we identified an auxin-dependent basic Helix Loop Helix transcription factor network that mediates the activity of this hormone in suppressing embryo development from the suspensor. (© 2018 American Society of Plant Biologists. All rights reserved.)
Databáze:	MEDLINE
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