Light-induced auxin-inhibiting substance from cabbage ( Brassica oleacea L.) shoots

• Published in: Tetrahedron letters Vol. 38; no. 48; pp. 8327 - 8330
• Main Authors: Kosemura, Seiji, Niwa, Kazuki, Emori, Hideyuki, Yokotani-Tomita, Kaori, Hasegawa, Koji, Yamamura, Shosuke
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.1997
• Subjects: plant biochemistry; plant physiology
• ISSN: 0040-4039; 1873-3581
• DOI: 10.1016/S0040-4039(97)10213-1

A light-induced auxin-inhibitory substance, indolylacetonitrile (IAN), was isolated from light-grown cabbage ( Brassica olearea L.) shoots. The IAN content in cabbage shoots increased in response to light. Cabbage hypocotyl elongation is inhibited by 10 −5M of IAN in 90 min but promoted after 48 hr. Light-induced growth inhibition is caused by the degradation of 3-indolylmethylglucosnolathe (IMG) to IAN which is, in turn, converted to the growth hormone indole-3-acetic acid (IAA). A light-induced auxin-inhibitory substance, indolylacetonitrile (IAN), was isolated from cabbage ( Brassica olearea L.) shoots. The IAN content in cabbage shoots increased in responce to light. Cabbege hypocotyl elongation is inhibited by 10 −5M of IAN in 90 min but promoted after 48 hr.