Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf
<p>Abscisic Acid (ABA) is a key phytohormone that regulates plant development under stress. ABA induces dormancy in seeds during maturation, whereas its levels and activity gradually decrease as germination and seedling growth progress. Under abiotic stress conditions, elevated levels of ABA i...
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2025
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| _version_ | 1849927636716879872 |
|---|---|
| author | Deeksha Singh (11009626) |
| author2 | Premachandran Yadukrishnan (22678733) Puthan Valappil Rahul (22678736) Sourav Datta (11442239) |
| author2_role | author author author |
| author_facet | Deeksha Singh (11009626) Premachandran Yadukrishnan (22678733) Puthan Valappil Rahul (22678736) Sourav Datta (11442239) |
| author_role | author |
| dc.creator.none.fl_str_mv | Deeksha Singh (11009626) Premachandran Yadukrishnan (22678733) Puthan Valappil Rahul (22678736) Sourav Datta (11442239) |
| dc.date.none.fl_str_mv | 2025-11-25T05:11:08Z |
| dc.identifier.none.fl_str_mv | 10.3389/fphgy.2025.1675932.s001 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/figure/Image_1_A_COP1-HY5-ABI5_module_regulates_ABA-mediated_post-germination_developmental_arrest_pdf/30703439 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Plant Physiology ABA signaling HY5 (ELONGATED HYPOCOTYL 5) ABI5 (ABA insensitive 5) post germination seedling development |
| dc.title.none.fl_str_mv | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf |
| dc.type.none.fl_str_mv | Image Figure info:eu-repo/semantics/publishedVersion image |
| description | <p>Abscisic Acid (ABA) is a key phytohormone that regulates plant development under stress. ABA induces dormancy in seeds during maturation, whereas its levels and activity gradually decrease as germination and seedling growth progress. Under abiotic stress conditions, elevated levels of ABA inhibit seed germination and/or impose post-germination growth arrest. The transcription factor ABSCISIC ACID INSENSITIVE 5 (ABI5) regulates the interplay between ABA and light signaling to modulate this process. The light-regulated transcription factor ELONGATED HYPOCOTYL 5 (HY5) modulates ABA-mediated inhibition of post-germination development. However, the interrelation between HY5 and ABI5 in regulating post-germination development remains poorly understood. Here, using molecular, genetic, and biochemical approaches, we show that ABI5 and HY5 proteins reciprocally influence each other’s accumulation during early plant development. We further find that ABA induces nuclear accumulation of COP1, which correlates with reduced HY5 levels and enhanced ABI5 accumulation under stress conditions. Together, our results support a model in which a double-negative feedback loop between HY5 and ABI5 contributes to ABA-mediated post-germination growth arrest.</p> |
| eu_rights_str_mv | openAccess |
| id | Manara_33af7aca25ad4fe13e0ea52fe7466655 |
| identifier_str_mv | 10.3389/fphgy.2025.1675932.s001 |
| network_acronym_str | Manara |
| network_name_str | ManaraRepo |
| oai_identifier_str | oai:figshare.com:article/30703439 |
| publishDate | 2025 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdfDeeksha Singh (11009626)Premachandran Yadukrishnan (22678733)Puthan Valappil Rahul (22678736)Sourav Datta (11442239)Plant PhysiologyABA signalingHY5 (ELONGATED HYPOCOTYL 5)ABI5 (ABA insensitive 5)post germinationseedling development<p>Abscisic Acid (ABA) is a key phytohormone that regulates plant development under stress. ABA induces dormancy in seeds during maturation, whereas its levels and activity gradually decrease as germination and seedling growth progress. Under abiotic stress conditions, elevated levels of ABA inhibit seed germination and/or impose post-germination growth arrest. The transcription factor ABSCISIC ACID INSENSITIVE 5 (ABI5) regulates the interplay between ABA and light signaling to modulate this process. The light-regulated transcription factor ELONGATED HYPOCOTYL 5 (HY5) modulates ABA-mediated inhibition of post-germination development. However, the interrelation between HY5 and ABI5 in regulating post-germination development remains poorly understood. Here, using molecular, genetic, and biochemical approaches, we show that ABI5 and HY5 proteins reciprocally influence each other’s accumulation during early plant development. We further find that ABA induces nuclear accumulation of COP1, which correlates with reduced HY5 levels and enhanced ABI5 accumulation under stress conditions. Together, our results support a model in which a double-negative feedback loop between HY5 and ABI5 contributes to ABA-mediated post-germination growth arrest.</p>2025-11-25T05:11:08ZImageFigureinfo:eu-repo/semantics/publishedVersionimage10.3389/fphgy.2025.1675932.s001https://figshare.com/articles/figure/Image_1_A_COP1-HY5-ABI5_module_regulates_ABA-mediated_post-germination_developmental_arrest_pdf/30703439CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/307034392025-11-25T05:11:08Z |
| spellingShingle | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf Deeksha Singh (11009626) Plant Physiology ABA signaling HY5 (ELONGATED HYPOCOTYL 5) ABI5 (ABA insensitive 5) post germination seedling development |
| status_str | publishedVersion |
| title | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf |
| title_full | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf |
| title_fullStr | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf |
| title_full_unstemmed | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf |
| title_short | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf |
| title_sort | Image 1_A COP1-HY5-ABI5 module regulates ABA-mediated post-germination developmental arrest.pdf |
| topic | Plant Physiology ABA signaling HY5 (ELONGATED HYPOCOTYL 5) ABI5 (ABA insensitive 5) post germination seedling development |