Reciprocal Regulatory Interactions Between Class I TCP Transcription Factors and ABA Signalling Balance Growth and Stress Responses in Arabidopsis.

Arabidopsis thaliana class I TCPs TCP14 and TCP15 negatively regulate ABA and salt stress responses by activating ABA-signalling negative regulators, including AFP2.

• Why it matters: ABA and salt stress responses are controlled by layered molecular networks, but how developmental TCP transcription factors interface with ABA signalling was unclear.
• What they did: Using genetic and molecular analyses of TCP14 and TCP15, the study tested their regulation of ABA-pathway genes and identified AFP2 as a directly activated negative regulator.
• The result: ABA reduces TCP14 and TCP15 protein abundance, limiting TCP-driven growth transcription and de-repressing ABA-signalling pathways during stress.

AI summary of the abstract · may contain errors · not medical advice · read the paper.