Question

germination of pollen grain on stigma and growth of pollen tube

Answer 1

The germination of pollen grain in vitro and the growth of pollen tube in the pistil of rice were observed with a microscope. The stigma was removed at different time points after pollination to study its effect on seed setting rate.

Answer 2

Answer:

The germination of pollen grain in vitro and the growth of pollen tube in the pistil of rice were observed with a microscope. ... Meanwhile, a small amount of callose began to deposit in the pollen tubes, a great deal of callose was observed at 50 min after pollination, whereas the pollen grain began to shrink.