RNA Interference of NtNCED3 Reduces Drought Tolerance and Impairs Plant Growth Through Feedback Regulation of Isoprenoids in Nicotiana Tabacum

    July 2018 in “ Environmental and Experimental Botany ”
    Yongxia Yang, Qianqian Zhou, Jiayang Xu, Qingchang Li, Songtao Zhang
    TLDR Silencing NtNCED3-2 gene in tobacco reduces drought tolerance and impairs growth.
    The study isolated two variants of the NCED3 gene (NtNCED3-1 and NtNCED3-2) from tobacco and found that silencing NtNCED3-2 reduced abscisic acid (ABA) content, drought tolerance, and impaired plant growth. Specifically, suppression of NtNCED3-2 inhibited primary root development, root hair growth, and trichome development, and decreased photosynthetic ability by reducing diterpenoids and photosynthetic pigments. The findings indicated that NtNCED3-2 plays a crucial role in ABA-mediated feedback regulation of isoprenoid metabolism, which is essential for plant growth and stress response.
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