Biochemistry of oil bodies in higher

油体是植物细胞内物质积累的细胞器，本文对油体的超分子结构和功能进行了研究.预期母菊芽原基中的油体是由单分子的酰基甘油所包围。油体主要成分为三酰甘油、单酰甘油和二酰甘油、脂肪酸、磷脂和甾体.洋甘菊茎原基中的油体不含任何挥发性成分（精油），但含有少量蛋白质。洋甘菊种子油体中的蛋白质具有蛋白酶样活性，而芽原基油体中的蛋白质具有肽酶样活性.通过克隆甘菊油体中两种蛋白酶的cDNA，确定了其氨基酸序列，这两种蛋白均由501个氨基酸组成，分别具有丝氨酸羧肽酶和巯基蛋白酶的活性位点。还观察到，与这些肽酶相关的mRNA增加了化学应激对培养细胞的甘菊。

The supramolecule structure and function of oil bodies, which are known as an organelle for accumulation of the materials in the plant cells, were investigated.1. It was expected that the oil body in the shoot primordia of Matricaria chamomilla was constructed as a surrounded monolayer molecule of acylglycerols. The oil bodies contained triacylglycerols as major components, mono- and diacyl glycerols, fatty acids, phospholipids, and steroids.2. The oil body in the shoot primordia of M.chamomilla did not contain any volatile components (essential oils), but contained a small amount of proteins. Proteins containing in the oil body in the seeds of M.chamomilla have a protease-like activity, but those in the oil body of the shoot primordia showed a peptidase-like activity.3. Amino acid sequences of two proteases found in the oil bodies of M.chamomilla was determined by cloning of their corresponding cDNA ; both proteins are constructed by 501 amino acids, and have active cites for serine carboxypeptidase and thiol protease, respectively. It was also observed that mRNAs related to these peptidases were increased by the chemical stress against the cultured cells of M.chamomilla.