Who among the following discovered ethylene?
H.H. Cousins observed the release of volatile substances from rippened fruits that aids in the faster ripening of fruits. The gaseous plant growth regulator was later identified as ethylene.
Skoog and Miller discovered cytokinin, which has a notable effect on cytokinesis.
E. Kurosawa identified gibberellins.
C. Darwin and F. Darwin first discovered auxins, and it was later isolated from the coleoptile tip of oat seedlings by F.W. Went.