کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2016939 | 1542042 | 2016 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
OsBBX14 delays heading date by repressing florigen gene expression under long and short-day conditions in rice
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
B-box (BBX) proteins are zinc finger proteins containing B-box domains, which have roles in Arabidopsis growth and development. However, little is known concerning rice BBXs. Herein, we identified a rice BBX protein, Oryza sativa BBX14 (OsBBX14). OsBBX14 is highly expressed in flag leaf blades. OsBBX14 expression shows a diurnal rhythm under photoperiodic conditions and subsequent continuous white light. OsBBX14 is located in the nucleus and has transcriptional activation potential. OsBBX14-overexpression (OsBBX14-OX) lines exhibited delayed heading date under long-day (LD) and short-day (SD) conditions, whereas RNAi lines of OsBBX14 lines had similar heading dates to the WT. The florigen genes, Hd3a and RFT1, were downregulated in the OsBBX14-OX lines under LD and SD conditions. Under LD conditions, Hd1 was expressed higher in the OsBBX14-OX lines than in the wild type (WT), and the rhythmic expression of circadian clock genes, OsLHY and OsPRR1, was changed in OsBBX14-OX lines. Thus, OsBBX14 acts as a floral repressor by promoting Hd1 expression under LD conditions, probably because of crosstalk with the circadian clock. Under SD conditions, Ehd1 expression was reduced in OsBBX14-OX lines, but Hd1 and circadian clock gene expressions were unaffected, indicating that OsBBX14 acts as a repressor of Ehd1. Our findings suggested that OsBBX14 regulates heading date differently under LD and SD conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 247, June 2016, Pages 25-34
Journal: Plant Science - Volume 247, June 2016, Pages 25-34
نویسندگان
Bo Bai, Jie Zhao, Yaping Li, Fang Zhang, Jinjun Zhou, Fan Chen, Xianzhi Xie,