Live-Cell Imaging and Optical Manipulation of Arabidopsis Early Embryogenesis

Intercellular communications are essential for cell proliferation and differentiation during plant embryogenesis. However, analysis of intercellular communications in living material in real time is difficult owing to the restricted accessibility of the embryo within the flower. We established a liv...

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Published inDevelopmental cell Vol. 34; no. 2; pp. 242 - 251
Main Authors Gooh, Keita, Ueda, Minako, Aruga, Kana, Park, Jongho, Arata, Hideyuki, Higashiyama, Tetsuya, Kurihara, Daisuke
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 27.07.2015
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Summary:Intercellular communications are essential for cell proliferation and differentiation during plant embryogenesis. However, analysis of intercellular communications in living material in real time is difficult owing to the restricted accessibility of the embryo within the flower. We established a live-embryo imaging system to visualize cell division and cell fate specification in Arabidopsis thaliana from zygote division in real time. We generated a cell-division lineage tree for early embryogenesis in Arabidopsis. Lineage analysis showed that both the direction and time course of cell division between sister cells differed along the apical-basal or radial axes. Using the Arabidopsis kpl mutant, in which single-fertilization events are frequent, we showed that endosperm development is not required for pattern formation during early embryogenesis. Optical manipulation demonstrated that damage to the embryo initial cell induces cell fate conversion of the suspensor cell to compensate for the disrupted embryo initial cell even after cell fate is specified. [Display omitted] •A live-embryo imaging system for Arabidopsis is established•A complete lineage tree from double fertilization to 64-cell embryo uses this system•Endosperm development is not required for cell patterning during early embryogenesis•Damage to an embryo initial cell induces rapid cell fate conversion in the suspensor Gooh et al. establish a live-embryo imaging system for Arabidopsis and generate a complete lineage tree from double fertilization in early embryogenesis. They provide a platform for real-time analysis of cell division dynamics and cell fate specification using optical manipulation and micro-engineering techniques such as laser irradiation of specific cells.
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ISSN:1534-5807
1878-1551
DOI:10.1016/j.devcel.2015.06.008