التفاصيل البيبلوغرافية
| العنوان: |
Phytochrome‐interacting factors play shared and distinct roles in regulating shade avoidance responses in Populus trees. |
| المؤلفون: |
Sun, Fan, Cheng, Hongli, Song, Zhi, Yan, Huiting, Liu, Huajie, Xiao, Xingyue, Zhang, Zhichao, Luo, Mengting, Wu, Feier, Lu, Jun, Luo, Keming, Wei, Hongbin |
| المصدر: |
Plant, Cell & Environment; Jun2024, Vol. 47 Issue 6, p2058-2073, 16p |
| مصطلحات موضوعية: |
WOODY plants, POPLARS, GENE expression, TREES, PLANT growth, PHENOTYPES |
| مستخلص: |
Plants adjust their growth and development in response to changing light caused by canopy shade. The molecular mechanisms underlying shade avoidance responses have been widely studied in Arabidopsis and annual crop species, yet the shade avoidance signalling in woody perennial trees remains poorly understood. Here, we first showed that PtophyB1/2 photoreceptors serve conserved roles in attenuating the shade avoidance syndrome (SAS) in poplars. Next, we conducted a systematic identification and characterization of eight PtoPIF genes in Populus tomentosa. Knocking out different PtoPIFs led to attenuated shade responses to varying extents, whereas overexpression of PtoPIFs, particularly PtoPIF3.1 and PtoPIF3.2, led to constitutive SAS phenotypes under normal light and enhanced SAS responses under simulated shade. Notably, our results revealed that distinct from Arabidopsis PIF4 and PIF5, which are major regulators of SAS, the Populus homologues PtoPIF4.1 and PtoPIF4.2 seem to play a minor role in controlling shade responses. Moreover, we showed that PtoPIF3.1/3.2 could directly activate the expression of the auxin biosynthetic gene PtoYUC8 in response to shade, suggesting a conserved PIF‐YUC‐auxin pathway in modulating SAS in tree. Overall, our study provides insights into shared and divergent functions of PtoPIF members in regulating various aspects of the SAS in Populus. Summary statement: We systematically characterized the functions of eight PtoPIF genes in Populus tomentosa in controlling shade avoidance syndromes (SAS). Our results indicate a conserved PtophyB‐PtoPIF‐YUC‐auxin pathway in modulating SAS, providing insights into shared and divergent functions of different PtoPIFs in Populus trees. [ABSTRACT FROM AUTHOR] |
|
Copyright of Plant, Cell & Environment is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |