The weight itself technically will not change. The pull of gravity lessens, making it appear that it is lighter on the moon.
The pressure would increase. When the temperature change form cold to hot, the gas will find ways to escape from containment. Thus, if it cannot escape that pressure will keep on increasing as the temperature rises.
Explanation:
from internet
the act of transferring pollen grains from the male anther of a flower to the female stigma
