Long-Term Mild Heat Causes Post-Mitotic Pollen Abortion Through a Local Effect on Flowers.

ABSTRACT: Crop reproductive success is significantly challenged by heatwaves, which are increasing in frequency and severity globally. Heat-induced male sterility is mainly due to aborted pollen development, but it is not clear whether this is through direct or systemic effects. Here, long-term mild heat (LTMH) treatment, mimicking a heatwave, was applied locally to tomato flowers or whole plants and followed up by cytological, transcriptomic, and biochemical analyses. By analyzing pollen viability, LTMH was shown to act directly on the flowers and not via effects on other plant tissue. The meiosis to early microspore stage of pollen development was the most sensitive to LTMH and 3 days of exposure around this period was sufficient to significantly reduce pollen viability at the flower anthes

SUBMITTER: Xu J 

PROVIDER: S-EPMC9310381 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature