Optimizing Daily Light Integral in Seedling Stage Accelerates Heading and Flowering in Wheat Under LED Lighting.

ABSTRACT: Conventional wheat breeding in the field is limited to two generations per year and is susceptible to environmental fluctuations. Speed-breeding in a plant factory offers a solution; however, recommendations for lighting strategies remain limited. To identify the optimal daily light integral (DLI) for the seedling stage, we tested three light intensities (300, 500, and 700 μmol m^-2 s^-1) and four photoperiods (10, 14, 18, and 22 h d^-1), resulting in DLIs ranging from 10.8 to 55.4 mol m^-2 d^-1. Our results indicated that an optimal DLI of 39.6 mol m^-2 d^-1 was associated with the highest seedling index (0.26) and root-to-shoot ratio (0.42), as well as enhanced photosystem performance. Beyond this DLI, these parameters

SUBMITTER: Zhong L 

PROVIDER: S-EPMC12844831 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature