Cytokinin Modulates Responses to Phytomelatonin in Arabidopsis thaliana under High Light Stress.

ABSTRACT: Fine-tuned interactions between melatonin (MT) and hormones affected by environmental inputs are crucial for plant growth. Under high light (HL) conditions, melatonin reduced photodamage in Arabidopsis thaliana and contributed to the restoration of the expression of the cytokinin (CK) synthesis genes IPT3, IPT5 and LOG7 and genes for CK signal transduction AHK2,3 and ARR 1, 4, 5 and 12 which were downregulated by stress. However, CK signaling mutants displayed no significant changes in the expression of CK genes following HL + MT treatment, implying that a fully functional cytokinin signaling pathway is a prerequisite for MT-CK interactions. In turn, cytokinin treatment increased the expression of the key melatonin synth

SUBMITTER: Bychkov IA 

PROVIDER: S-EPMC9821067 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature