The cell membranes are broken down, and the umami flavor is released.
キノコを凍らせて使うと旨味が増す理由を外国人に説明したいです。キノコの細胞にある水分が凍ることで体積が膨張し、細胞膜が破れて細胞が死ぬことで、旨味成分のもとがたくさんできるからです。
I want to explain to foreigners why mushrooms are frozen and then the umami flavor increases. It is because by freezing the moisture in mushroom cells, the volume increases. Then the cell membrane breaks and the cell dies, so the sources of umami flavor increases and can be obtained.
細胞膜 - cell membrane
破れて - broken
うまみ成分 - umami flavor
出ていく - released
Cell membranes are broken and flavors are released
「細胞膜が破れてうまみ成分が出ていく」は英語では「Cell membranes are broken and flavors are released」になります。
「キノコの細胞にある水分が凍ることで体積が膨張し、細胞膜が破れて細胞が死ぬことで、旨味成分のもとがたくさんできる」は「As the water in the mushroom cells freezes, the volume expands, the cell membrane breaks and the cell dies, so many sources of umami ingredients can be made」になります。