To germinate , rice seeds need to absorb a certain amount of water and be exposed to a temperature range of 10-40 องศาเซลเซียส . This breaks the dormancy stage of the seed .when planted into flooded soil, the shoot is the first to emerge from the seed , with the roots developing when the first shoot has reachedthe air .If the seed is planted in non-flooded soil , the root is the first to emerge from the seed and then the shoot.