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DEK1 displays a strong subcellular polarity during Physcomitrella patens 3D growth
Author(s) -
Perroud PierreFrançois,
Meyberg Rabea,
Demko Viktor,
Quatrano Ralph S.,
Olsen OddArne,
Rensing Stefan A.
Publication year - 2020
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.16417
Subject(s) - physcomitrella patens , biology , microbiology and biotechnology , subcellular localization , protein subcellular localization prediction , morphogenesis , mutant , gene , genetics , cytoplasm
Summary Defective Kernel 1 (DEK1) is genetically at the nexus of the 3D morphogenesis of land plants. We aimed to localize DEK1 in the moss Physcomitrella patens to decipher its function during this process. To detect DEK1 in vivo , we inserted the tdTomato fluorophore into PpDEK1 gene locus. Confocal microscopy coupled with the use of time‐gating allowed the precise DEK1 subcellular localization during 3D morphogenesis. DEK1 localization displays a strong polarized signal, as it is restricted to the plasma membrane domain between recently divided cells during the early steps of 3D growth development as well as during the subsequent vegetative growth. The signal furthermore displays a clear developmental pattern because it is only detectable in recently divided and elongating cells. Additionally, DEK1 localization appears to be independent of its calpain domain proteolytic activity. The DEK1 polar subcellular distribution in 3D tissue developing cells defines a functional cellular framework to explain its role in this developmental phase. Also, the observation of DEK1 during spermatogenesis suggests another biological function for this protein in plants. Finally the DEK1‐tagged strain generated here provides a biological platform upon which further investigations into 3D developmental processes can be performed.