"Bud to Fruit"- Hormonal Interactions Governing Early Fruit Development.

Hormones are fundamental architects of plant reproduction, orchestrating the transition from pollination to fruit set. Recent advances have underscored the central roles of auxin and gibberellins in ovary growth, seed development, and parthenocarpy, while their intricate interplay with cytokinin, ethylene, abscisic acid, brassinosteroids, jasmonic acid, and salicylic acid fine-tunes early fruit development. A dynamic regulatory network involving transcription factors, microRNAs, and hormone-responsive genes modulates these processes, ensuring coordinated cellular events across diverse fruit types.

Transcriptomics and trans-organellar complementation reveal limited signaling of 12-cis-oxo-phytodienoic acid during early wound response in Arabidopsis.

12-cis-oxo-phytodienoic acid (OPDA), a precursor of jasmonoyl-isoleucine (JA-Ile), is known to have distinct signaling roles in Arabidopsis, as shown in studies using the opr3 mutant, which lacks OPDA REDUCTASE3 (OPR3). This mutant, however, accumulates low levels of JA-Ile through an OPR2-mediated bypass. To investigate OPDA signaling, the wound-induced transcriptome of the opr2opr3 mutant is compared to that of wild-type and allene oxide synthase mutant.