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. 2020 Apr 16;11:443. doi: 10.3389/fpls.2020.00443

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Copyright © 2020 Wang, Wang, Ge and Dai

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Number of days from sampling dates to the first flowering date of six species at different chilling, forcing temperature and photoperiod conditions. The low (3 chilling days), intermediate (38 chilling days), and high (59 chilling days) indicate different chilling treatments, respectively. 12, 15, and 18°C indicate different forcing temperatures. Different colors indicate long (14h) and short (10 h) photoperiods. The flowers of the last four species could not open in low chilling condition. The error bars indicate standard deviation among three replicates (no error bar is presented when the standard deviation equals to zero). (A) J. nudiflorum, (B) F. suspensa, (C) V. dilatatum, (D) Y. denudata, (E) C. yedoensis, (F) A. davidiana.