Dynamic actin controls polarity induction de novo in protoplasts.
Dynamic actin controls polarity induction de novo in protoplasts.
复制标题
动态肌动蛋白从头控制原生质体的极性诱导
DOI:
10.1111/jipb.12001
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发表时间:
2013
影响因子:
11.4
通讯作者:
Nick P.
中科院分区:
文献类型:
--
作者:
Zaban B;Maisch J;Nick P.
Cell polarity and axes are central for plant morphogenesis. To study how polarity and axes are inducedde novo, we investigated protoplasts of tobaccoNicotiana tabacum cv. BY‐2expressing fluorescently‐tagged cytoskeletal markers. We standardized the system to such a degree that we were able to generate quantitative data on the temporal patterns of regeneration stages. The synthesis of a new cell wall marks the transition to the first stage of regeneration, and proceeds after a long preparatory phase within a few minutes. During this preparatory phase, the nucleus migrates actively, and cytoplasmic strands remodel vigorously. We probed this system for the effect of anti‐cytoskeletal compounds, inducible bundling of actin, RGD‐peptides, and temperature. Suppression of actin dynamics at an early stage leads to aberrant tripolar cells, whereas suppression of microtubule dynamics produces aberrant sausage‐like cells with asymmetric cell walls. We integrated these data into a model, where the microtubular cytoskeleton conveys positional information between the nucleus and the membrane controlling the release or activation of components required for cell wall synthesis. Cell wall formation is followed by the induction of a new cell pole requiring dynamic actin filaments, and the new cell axis is manifested as elongation growth perpendicular to the orientation of the aligned cortical microtubules.
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影响因子:
2.9
作者:
B. Pickard
通讯作者:
B. Pickard
影响因子:
3.7
作者:
C. Wymer;S. Wymer;D. Cosgrove;R. Cyr
通讯作者:
R. Cyr
影响因子:
2.9
作者:
Dhonukshe, P;Kleine-Vehn, J;Friml, J
通讯作者:
Friml, J
影响因子:
10.1
作者:
P. Lintilhac
通讯作者:
P. Lintilhac
影响因子:
--
作者:
E. Kranz
通讯作者:
E. Kranz