Meteorological seed

It is because gibberellin promotes seed germination and abscisic acid inhibits seed germination after high temperature and heavy rain. When wheat is about to mature, abscisic acid will be released in high temperature weather. After heavy rain, wheat seeds can easily germinate on the ear under the action of gibberellin. In other words, the dormancy of seeds was broken in the continuous high temperature weather, and the seeds germinated rapidly after heavy rain.