Deficient aldosterone synthase activity results in impaired biosynthesis of aldosterone while corticosterone in the zona glomerulosa is excessively produced in both corticosterone methyl oxidase deficiency type I and II.
The text describes a situation where aldosterone production is impaired due to deficient aldosterone synthase, leading to an overproduction of corticosterone in the zona glomerulosa. This occurs in both corticosterone methyl oxidase deficiency type I and II.