Heatwaves exacerbate pollen limitation through reductions in pollen production and pollen vigour.

ABSTRACT: Increasingly frequent heat waves threaten the reproduction of flowering plants; compromising the future persistence, adaptive capacity, and dispersal of wild plant populations, and also the yield of fruit-bearing crop plants. Heat damages the development of sensitive floral organs and gametes, which inhibits pollen germination, pollen tube growth, and fertilization. However, the role of heat has not been integrated into the framework of pollen quantity and quality limitation and how heat influences the success of cross and self-pollination. We exposed developing flowers to either controlled temperature (25 °C:20 °C) or extreme heat (35 °C:20 °C) over 72 h. We then hand-pollinated them with either crossed or self-derived pollen from the same temperature treatment to determine the direct and

SUBMITTER: Rosenberger NM 

PROVIDER: S-EPMC11447236 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature