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@article{2417700,
author = {Agrawal, Rekha and Sharma, Mohan and Dwivedi, Nidhi and Maji, Sourobh and Thakur, Pallabi and Junaid, Alim and Fajkus, Jiří and Laxmi, Ashverya and Thakur, Jitendra K.},
article_number = {4},
doi = {http://dx.doi.org/10.1093/plphys/kiac220},
keywords = {TRANSCRIPTIONAL REGULATION; HISTONE MODIFICATIONS; PLANT MEDIATOR; SALICYLIC-ACID; ARABIDOPSIS; COMPLEX; PHYTOCHROME; BHLH; MYC2; EXPRESSION},
language = {eng},
issn = {0032-0889},
journal = {Plant Physiology},
title = {MEDIATOR SUBUNIT17 integrates jasmonate and auxin signaling pathways to regulate thermomorphogenesis},
url = {https://academic.oup.com/plphys/article/189/4/2259/6585885},
volume = {189},
year = {2022}
}
TY - JOUR
ID - 2417700
AU - Agrawal, Rekha - Sharma, Mohan - Dwivedi, Nidhi - Maji, Sourobh - Thakur, Pallabi - Junaid, Alim - Fajkus, Jiří - Laxmi, Ashverya - Thakur, Jitendra K.
PY - 2022
TI - MEDIATOR SUBUNIT17 integrates jasmonate and auxin signaling pathways to regulate thermomorphogenesis
JF - Plant Physiology
VL - 189
IS - 4
SP - 2259-2280
EP - 2259-2280
PB - American Society of Plant Physiologists
SN - 00320889
KW - TRANSCRIPTIONAL REGULATION
KW - HISTONE MODIFICATIONS
KW - PLANT MEDIATOR
KW - SALICYLIC-ACID
KW - ARABIDOPSIS
KW - COMPLEX
KW - PHYTOCHROME
KW - BHLH
KW - MYC2
KW - EXPRESSION
UR - https://academic.oup.com/plphys/article/189/4/2259/6585885
N2 - Plant adjustment to environmental changes involves complex crosstalk between extrinsic and intrinsic cues. In the past two decades, extensive research has elucidated the key roles of PHYTOCHROME-INTERACTING FACTOR4 (PIF4) and the phytohormone auxin in thermomorphogenesis. In this study, we identified a previously unexplored role of jasmonate (JA) signaling components, the Mediator complex, and their integration with auxin signaling during thermomorphogenesis in Arabidopsis (Arabidopsis thaliana). Warm temperature induces expression of JA signaling genes including MYC2, but, surprisingly, this transcriptional activation is not JA dependent. Warm temperature also promotes accumulation of the JA signaling receptor CORONATINE INSENSITIVE1 (COI1) and degradation of the JA signaling repressor JASMONATE-ZIM-DOMAIN PROTEIN9, which probably leads to de-repression of MYC2, enabling it to contribute to the expression of MEDIATOR SUBUNIT17 (MED17). In response to warm temperature, MED17 occupies the promoters of thermosensory genes including PIF4, YUCCA8 (YUC8), INDOLE-3-ACETIC ACID INDUCIBLE19 (IAA19), and IAA29. Moreover, MED17 facilitates enrichment of H3K4me3 on the promoters of PIF4, YUC8, IAA19, and IAA29 genes. Interestingly, both occupancy of MED17 and enrichment of H3K4me3 on these thermomorphogenesis-related promoters are dependent on PIF4 (or PIFs). Altered accumulation of COI1 under warm temperature in the med17 mutant suggests the possibility of a feedback mechanism. Overall, this study reveals the role of the Mediator complex as an integrator of JA and auxin signaling pathways during thermomorphogenesis.
ER -
AGRAWAL, Rekha, Mohan SHARMA, Nidhi DWIVEDI, Sourobh MAJI, Pallabi THAKUR, Alim JUNAID, Jiří FAJKUS, Ashverya LAXMI a Jitendra K. THAKUR. MEDIATOR SUBUNIT17 integrates jasmonate and auxin signaling pathways to regulate thermomorphogenesis. \textit{Plant Physiology}. American Society of Plant Physiologists, 2022, roč.~189, č.~4, s.~2259-2280. ISSN~0032-0889. Dostupné z: https://dx.doi.org/10.1093/plphys/kiac220.
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