High temperatures can negatively influence seed germination by disrupting the enzymatic processes essential for growth. Elevated heat may cause seed dormancy or injury, affecting their ability to absorb water and nutrients. Additionally, high temperatures can lead to desiccation, further inhibiting germination. However, some species have adaptations allowing them to successfully germinate in warmer conditions. In summary, temperature extremes can either hinder or promote germination depending on the species' ecological adaptations.