During seed germination, seed coat ruptures due to
During the beginning stage of the
germination, the seeds take up water rapidly and this results in swelling and
softening of the seed coat at an optimum temperature. By rupturing of the seed
coats helps to emerge the radicle and the plumule to form a primary root. This
stage is referred to as an imbibition. So, the correct answer is 'Massive imbibition of water’.