Arabidopsis Villin4 Is Involved in Root Hair Growth Through Regulating Actin Organization in a Ca2+-Dependent Manner

    January 2011 in “ New Phytologist ”
    Yi Zhang, Yingyu Xiao, Fei Du, Lijuan Cao, Huaijian Dong, Haiyun Ren
    TLDR VILLIN4 helps root hair growth by organizing actin with calcium.
    The study explored the role of Arabidopsis VILLIN4 (AtVLN4) in root hair growth, emphasizing its regulation of actin organization in a calcium-dependent manner. AtVLN4 was found to bundle and sever actin filaments, with these activities being influenced by calcium levels, which are crucial for maintaining actin filament dynamics. The absence of AtVLN4 led to shorter root hairs and altered cytoplasmic streaming, indicating its essential role in normal root hair growth. The research highlighted AtVLN4's importance in forming and maintaining actin cables, which are vital for proper root hair function and development.
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