Catalyzes the NAD-dependent oxidation of L-arabinitol to L-xylulose in the fungal L-arabinose catabolic pathway. L-arabinose catabolism is important for using plant material as a carbon source. Not active on D-arabinitol, D-sorbitol and D-mannitol. L-arabinitol + NAD(+) = H(+) + L-xylulose + NADH Binds 2 Zn(2+) ions per subunit. Optimum pH is 9.5. Active from pH 8 to pH 10.5. Optimum temperature is 45-55 degrees Celsius. Carbohydrate degradation; L-arabinose degradation via L-arabinitol; D-xylulose 5-phosphate from L-arabinose (fungal route): step 2/5. Homotetramer. Belongs to the zinc-containing alcohol dehydrogenase family.