Draw the structure of ethylene. In the early part of the twentieth century, streets were lighted by coal burning lamps. It was noted that many trees close to the lamps dropped their leaves prematurely, relative to trees that were not close to the lamps. Based on your knowledge of ethylene and auxin, offer an explanation as to why the lamps might be the cause of leaf drop. Describe the synthesis of ethylene by plants and include the roles of ACC synthase and ACC oxidase.
Ethylene is implicated in plant response to flooding.
Evidence from transformed tomato plants provides strong evidence that fruit ripening in climacteric plants is caused by ethylene. Describe how a coleoptile growth assay is conducted and what would be the effects of ABA or auxin on growth. ABA may have many roles in seed germination of many plants. Certain seeds germinate in open areas but remain dormant under heavy leaf canopies. Describe the morphological differences between sun plants grown in shade and in bright sun.