Distinct Molecular Biomechanical Mechanisms Inhibit Endosperm Cell-Wall Weakening and Seed Germination at Cold and Warm Nonoptimal Temperatures.

ABSTRACT: Temperature sensing to adjust developmental rates and phenological responses to different climatic environments is critical for plant survival. Population-based thermal-time threshold models predict linear relationships between temperature and, for example, seed germination rates (speed), but the mechanisms are not known. Here, we used an integrative approach into the molecular biomechanical mechanisms underpinning a thermal-time model by combining Lepidium sativum micropylar endosperm (CAP) and radicle transcriptome analysis at defined heat units (generated by different time-temperature combinations) with corresponding CAP biomechanics. The thermal-time model delivered linear relationships with germination rates, but the underpinning biomechanical mechanisms of CAP weakening differed fund

SUBMITTER: Steinbrecher T 

PROVIDER: S-EPMC12502036 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature