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Phytochrome F plays critical roles in potato photoperiodic tuberization
Author(s) -
Zhou Tingting,
Song Botao,
Liu Tengfei,
Shen Yunlong,
Dong Liepeng,
Jing Shenglin,
Xie Conghua,
Liu Jun
Publication year - 2019
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/tpj.14198
Subject(s) - phytochrome , biology , photoperiodism , psychological repression , microbiology and biotechnology , gene , botany , genetics , gene expression , red light
Summary The transition to tuberization contributes greatly to the adaptability of potato to a wide range of environments. Phytochromes are important light receptors for the growth and development of plants, but the detailed functions of phytochromes remain unclear in potato. In this study, we first confirmed that phytochrome F ( StPHYF ) played essential roles in photoperiodic tuberization in potato. By suppressing the StPHYFgene, the strict short‐day potato genotype exhibited normal tuber formation under long‐day ( LD ) conditions, together with the degradation of the CONSTANTS protein St COL 1 and modulation of twoFLOWERINGLOCUS T ( FT ) paralogs, as demonstrated by the repression of StSP5G and by the activation of StSP6A during the light period. The function of StPHYFwas further confirmed through grafting the scion of StPHYF ‐silenced lines, which induced the tuberization of untransformed stock under LD s, suggesting that StPHYFwas involved in the production of mobile signals for tuberization in potato. We also identified that St PHYF exhibited substantial interaction with St PHYB both in vitro and in vivo . Therefore, our results indicate that St PHYF plays a role in potato photoperiodic tuberization, possibly by forming a heterodimer with St PHYB .