De novo zygotic transcription in wheat (Triticum aestivum L.) includes genes encoding small putative secreted peptides and a protein involved in proteasomal degradation

Wheat is one of the world’s most important crops, and increasing grain yield is a major challenge for the future. Still, our knowledge about the molecular machineries responsible for early post-fertilization events such as zygotic reprogramming, the initial cell-specification events during embryogen...

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Bibliographic Details
Published in:Plant reproduction 2013-09, Vol.26 (3), p.267-285
Main Authors: Leljak-Levanić, Dunja, Juranić, Martina, Sprunck, Stefanie
Format: Article
Language:English
Subjects:
Adaptor proteins
Agriculture
Biomedical and Life Sciences
Cell Biology
Cell interactions
Cell signaling
Crop yield
Degradation
Embryogenesis
Embryonic development
Embryonic growth stage
Embryos
Endosperm
Fertilization
Gene Expression Regulation, Plant - genetics
Gene Expression Regulation, Plant - physiology
Genes
Genetic transcription
Life Sciences
Original Article
Ovaries
Peptides
Peptides - genetics
Peptides - metabolism
Plant Proteins - genetics
Plant Proteins - metabolism
Plant Sciences
Proteasome Endopeptidase Complex - metabolism
Proteasomes
Proteins
Signaling
Substrates
Triticum - genetics
Triticum - metabolism
Triticum aestivum
Ubiquitin
Ubiquitin-protein ligase
Wheat
Zygotes
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Summary:Wheat is one of the world’s most important crops, and increasing grain yield is a major challenge for the future. Still, our knowledge about the molecular machineries responsible for early post-fertilization events such as zygotic reprogramming, the initial cell-specification events during embryogenesis, and the intercellular communication between the early embryo and the developing endosperm is very limited. Here, we describe the identification of de novo transcribed genes in the wheat zygote. We used wheat ovaries of defined post-fertilization stages to isolate zygotes and early embryos, and identified genes that are specifically induced in these particular stages. Importantly, we observed that some of the zygotic-induced genes encode proteins with similarity to secreted signaling peptides such as TAPETUM DETERMINANT 1 and EGG APPARATUS 1, and to MATH-BTB proteins which are known substrate-binding adaptors for the Cullin3-based ubiquitin E3 ligase. This suggests that both cell–cell signaling and targeted proteasomal degradation may be important molecular events during zygote formation and the progression of early embryogenesis.
ISSN:2194-7953
2194-7961
DOI:10.1007/s00497-013-0229-4