Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 547759
Title A Robust Auxin Response Network Controls Embryo and Suspensor Development through a bHLH Transcriptional Module
Author(s) Radoeva, Tatyana; Lokerse, Annemarie S.; Llavata-Peris, Cristina I.; Wendrich, Jos; Xiang, Daoquan; Liao, Che-Yang; Vlaar, Lieke; Boekschoten, Mark; Hooiveld, Guido; Datla, Raju; Weijers, Dolf
Source The Plant Cell 31 (2019). - ISSN 1040-4651 - p. 52 - 67.
DOI https://doi.org/10.1105/tpc.18.00518
Department(s) Biochemistry
EPS
VLAG
Nutrition, Metabolism and Genomics
Publication type Refereed Article in a scientific journal
Publication year 2019
Abstract Land plants can 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. A key question is thus how embryo identity in plants is controlled, and how this process is modified during non-zygotic embryogenesis. The Arabidopsis 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 have used auxin-dependent suspensor embryogenesis as a model to determine transcriptome changes during embryonic reprogramming. We find that reprogramming is complex and accompanied by large transcriptomic changes prior to anatomic 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 re-establishment of cellular auxin levels or response. This suggests a remarkable degree of feedback regulation to create resilience in auxin response during embryo development. Starting from the transcriptome of auxin-deregulated embryos, we identify an auxin-dependent bHLH transcription factor network that mediates the activity of this hormone in suppressing embryo development from the suspensor.
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