title: The occurrence of enzymes involved in phenylpropanoid metabolism in the tapetum fraction of anthers.
abstract: The contents of another loculus were separated in a pollen and tapetum fraction. The following enzymes involved in phenylpropanoid metabolism were present in the tapetum fraction: shikimate dehydrogenase; phenylalanine ammonialyase; cinnamic acid 4-hydroxylase; SAM (S-adenosylmethionine): caffeate 3-O-methyltransferase; hydroxycinnamate: CoA ligase; "flavanone synthase"; chalcone-flavanone isomerase; SAM: 3',4'-dihydroxyflavonoid 3'-O-methyltransferase; O-glucosyltransferase. It is postulated, that these enzymes derived from the tapetum catalyze the different steps of phenylpropanoid metabolism at or in cavities of the exine after their transfer into the loculus.
mesh_terms: D000217:Acyltransferases / Q000378:metabolism; D055598:Chemical Phenomena; D002621:Chemistry; D002934:Cinnamates; D003066:Coenzyme A Ligases / Q000378:metabolism; D003374:Coumarins; D007535:Isomerases / Q000378:metabolism; D008314:Malonates; D008780:Methyltransferases / Q000378:metabolism; D006899:Mixed Function Oxygenases / Q000378:metabolism; D010088:Oxidoreductases / Q000378:metabolism; D010650:Phenylalanine Ammonia-Lyase / Q000378:metabolism; D010944:Plants / Q000201:enzymology*; D011058:Pollen / Q000201:enzymology; D012765:Shikimic Acid
chemical_list: D002934:Cinnamates; D003374:Coumarins; D008314:Malonates; D012765:Shikimic Acid; D006899:Mixed Function Oxygenases; D010088:Oxidoreductases; D008780:Methyltransferases; D000217:Acyltransferases; D010650:Phenylalanine Ammonia-Lyase; D007535:Isomerases; D003066:Coenzyme A Ligases