since selenomethionine appears to be a better precursor of ethylene in senescing flower tissue of ipomoea tricolor and in indole acetic acid-treated pea stem sections than is methionine ( konze jr , n schilling , h kende 1978 plant physiol 62 : 397-401 ) , we compared the effectiveness of selenomethionine and methionine to participate in reactions which may be connected to ethylene biosynthesis .
C0036584
selenomethionine
C0025646
methionine