Eiji Nambara

TL;DR: Identification of ABA metabolic genes has revealed that multiple metabolic steps are differentially regulated to fine-tune the ABA level at both transcriptional and post-transcriptional levels.

TL;DR: Results demonstrate that CYP707A family genes play a major regulatory role in controlling the level of ABA in plants.

TL;DR: The molecular cloning of GLUCOSE INSENSITIVE1 (GIN1) and ABSCISIC ACID DEFICIENT2 (ABA2) which encodes a unique Arabidopsis short-chain dehydrogenase/reductase (SDR1) that functions as a molecular link between nutrient signaling and plant hormone biosynthesis.

TL;DR: This study reveals that DELLA proteins play two important roles in GA signaling: (1) they help establish GA homeostasis by direct feedback regulation on the expression of GA biosynthetic and GA receptor genes, and (2) they promote theexpression of downstream negative components that are putative transcription factors/regulators or ubiquitin E2/E3 enzymes.

TL;DR: It is concluded that ethylene appears to be a negative regulator of ABA action during germination, while the ethylene response pathway positively regulates some aspects of A BA action that involve root growth in the absence of ethylene.