High Red-Blue Light Ratio Promotes Accelerated In Vitro Flowering and Seed-Set Development in <i>Amaranthus hypochondriacus</i> Under a Long-Day Photoperiod.

ABSTRACT: Grain amaranths are recalcitrant to conventional in vitro plant regeneration by organogenesis de novo or through somatic embryogenesis. Consequently, floral organogenesis by these methods, representing the culminating developmental point in angiosperms, is rarely achieved. In the present study, the manipulation of in vitro flowering was explored as part of a strategy designed to overcome grain amaranth's regeneration recalcitrance. It led to an efficient and reproducible in vitro protocol in which half-longitudinally dissected zygotic embryos generated fully developed Amaranthus hypochondriacus (Ah) plants. The use of high-irradiance illumination with LED lamps with a 3:1 red-blue irradiance ratio was a critical factor, leading to a 70% rate of early flowering events under fl

SUBMITTER: Bermudez-Valle AR 

PROVIDER: S-EPMC12566660 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature