Distylium racemosum

Cyclobalanopsis gilva Oerst./Ichiigashi Distylium racemosum S. et Z./Isunoki Euonymus macropterus Rupt./Hirobat-suribana... 

Distylium Factors Novel Plant Growth Regulators in Fresh Leaves of Distylium racemosum Sieb. et Zucc. 

In relation to Distylium factors research in Distylium racemosum leaves, Prof. Munakata has further studied the provisionally named " Corn factor " from corn germ oil 4). He has examined many plant oils in an effort to obtain a better source of novel plant growth regulators, including coconut oil, corn germ oil, cotton seed oil, linseed oil, olive oil, peanut oil, poppy oil, rape oil, sesame oil, soya oil, and turpentine oil, and found that corn germ oil showed a most remarkable activity in the LJT. Based... 

After brassinosteroids were identified in Chinese cabbage shoots( 20,22), followed by green tea leaves(2 ,20), we tried to identify Distylium factors A and B in the fresh healthy leaves of Distylium racemosum, which were again collected in the suburbs of Anjo city in 1982. (See Figure 1.)... 

Figure 1. Brassinosteroids identified from Distylium racemosum leaves.

The beginning of brassinosteroid research in Japan was initiated with Distylium factor research. Distylium factors were discovered in Distylium racemosum leaves, when bioassayed, using... 

Dehydroteasterone (31), the first naturally occurring 3,6-diketo brassinosteroid from Distylium racemosum and Triticum aestivum, respectively, was synthesized from typhasterol (7)45 or teasterone (S)44 by oxidation of their corresponding isopropylidenedioxy derivatives 66 and 67, respectively, with pyridinium chlorochromate and subsequent deprotection (Scheme 7). 

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