Gibberellins articles from across Nature Portfolio

Ji and colleagues show that the specific angiosperm growth-governing DELLA–SLY1/GID2 protein interaction evolved from a broader ancestral affinity, suggesting affinity narrowing to be a general evolutionary driver of interaction specificity.

Gibberellins (GA) negatively regulate UVB-mediated suppression of plant height in plants. Here, the authors show that GmILPA1-mediated degradation of GmGA2ox-like protein counteract the UV-B-mediated reduction of bioactive GAs contributing to the linkage between the affection of UV-B and GA on plant height of soybean.

Genetic and ChIP–seq analyses of missense DELLA mutants reveal a role of the DELLA PFYRE subdomain in H2A binding, which stabilizes the transcription factor–DELLA–H2A complexes at the target chromatin for global transcription reprogramming.

A drug screening system identifies a gibberellin receptor agonist, diphegaractin, found to exert gibberellin-like activity in the growth and maturation of grapes, lettuce, Arabidopsis, and citrus fruit.

The authors identified a sub-clade of NPF transporters that orchestrates GA12 long-distance shoot-to-root translocation. Once in the phloem unloading zone, ABA and GA are loaded into pericycle vacuoles and then slowly released to induce endodermal suberin formation in the maturation zone.

Hormone-dependent suberin deposition is a key process in root development and in response to biotic and abiotic stresses. A recent study demonstrates that long- and short-distance transport of abscisic acid (ABA) and gibberellin (GA) via four members of the nitrate and peptide transporter family (NPFs) is crucial for endodermal suberization in roots.

Seed germination is tightly regulated so that it only occurs in optimal environmental conditions; for root parasitic plants, this is the presence of a potential host plant revealed by strigolactone exudates. New research shows that, unexpectedly, this response to strigolactone bypasses the core gibberellin-dependent pathway for germination.

Gibberellins (GAs) control key growth and developmental processes in plants. Real-time monitoring of GA concentrations in living tissues is critical for understanding the actions of this hormone class. A first-generation optogenetic GA-nano-indicator now illuminates the effects of GA levels on cell length and light signalling.

Semi-dwarf cereal varieties have greatly increased crop yields due to their reduced stature, but they also reduce individual spike (ear) size. However, these traits appear to be regulated by distinct pathways, opening new opportunities to develop higher yielding crops.

Brassinosteroids and gibberellins are two principal growth-promoting hormones in plants. A transcription factor called JUB1 connects their signalling and biosynthesis through positive and negative feedback loops to finely coordinate developmental output.