大乘百法明門論開宗義決 1.102

1.102

內變執受種子色根者。言執受者有其二義。一識所依託安危事同。二以此為依能生本識。總而言之。攝為自體同安危義故名執受。不執受者謂不攝為自體之義。如器世界外六塵境及他依處。雖本識緣不攝受故。

Regarding "internally transforming into and appropriating seeds and physical faculties": "Appropriating" (upātta) has two meanings. First, the consciousness relies on them, sharing the same safety and danger. Second, relying on them, it can generate the mūlavijñāna. In sum, embracing them as its own entity and sharing safety and danger is called "appropriating." "Non-appropriating" means not embracing them as its own entity, such as the receptacle world, the external six sense-objects, and the physical bases of others; although the mūlavijñāna takes them as objects, it does not appropriate them.