A complex signaling trio in seed germination: Auxin-JA-ABA

Article Biochemistry & Molecular Biology

Auxin contributes to jasmonate-mediated regulation of abscisic acid signaling during seed germination in Arabidopsis

Song Mei et al.

Summary: Exogenous auxin synergistically enhances the delay of seed germination induced by ABA in Arabidopsis. Biosynthesis, perception, and signaling of auxin are crucial for JA-promoted ABA responses. AUXIN RESPONSE FACTOR10 (ARF10) and ARF16 positively mediate JA-increased ABA responses, and their physical association with JASMONATE ZIM-DOMAIN (JAZ) repressors and ABSCISIC ACID INSENSITIVE5 (ABI5) plays a key role in integrating auxin, JA, and ABA signaling pathways.

PLANT CELL (2023)

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Article Plant Sciences

ABI5 binding protein2 inhibits ABA responses during germination without ABA-INSENSITIVE5 degradation

Tim Lynch et al.

Summary: Overexpression of an inhibitor of ABA-INSENSITIVE5 combined with mutations in DWD HYPERSENSITIVE TO ABA results in extreme ABA resistance and desiccation tolerance in seeds. Overexpression of ABA-INSENSITIVE5 binding proteins (AFPs) leads to extreme ABA resistance and failure to acquire desiccation tolerance by affecting chromatin modification. AFPs may function as adapters for E3 ligases to promote germination in Arabidopsis.

PLANT PHYSIOLOGY (2022)

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Review Biochemistry & Molecular Biology

Jasmonates and Plant Salt Stress: Molecular Players, Physiological Effects, and Improving Tolerance by Using Genome-Associated Tools

Celia Delgado et al.

Summary: Soil salinity is a major limiting factor for crop productivity, and jasmonates (JAs) have been identified as important phytohormones in mediating plant response to salt stress. Molecular components of the JA-signaling pathway play key roles in the JA-associated response to salt stress, and exogenous JA applications can enhance antioxidant response in plants. Research is focusing on using genomic techniques to improve crop tolerance to salt stress, with an emphasis on jasmonates.

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES (2021)

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Review Plant Sciences