Catalyzes the hydrolysis of ester bond in chlorophyll to yield chlorophyllide and phytol (PubMed:10611389). Does not seem to be required for chlorophyll degradation during senescence (PubMed:17996203, PubMed:18349515, PubMed:31779896). a chlorophyll + H2O = a chlorophyllide + H(+) + phytol chlorophyll a + H2O = chlorophyllide a + H(+) + phytol Porphyrin-containing compound metabolism; chlorophyll degradation. Associates with the tonoplast and endoplasmic reticulum. Expressed in leaves, flowers and flower buds, but not in roots. Constitutively expressed at low level (PubMed:11950974). Not induced by methyl jasmonate treatment (PubMed:11950974). Induced by transition from dark to white light (PubMed:21896889). Unlike CLH1, the expression of this protein is not dependent on the presence of a functional COI1 protein. Belongs to the AB hydrolase superfamily. Lipase family.