Active Subsatnces in Chinese Chive and Rakkyo Plants for Breaking Bud Dormancy in Grapevines
Year: 1992
Type: article
Abstract: We previously found that volatile substances in Chinese chive ( Allium tuberosum ) and rakkyo ( A. chinense ) as well as garlic ( A. sativum ) stimulated budbreak in vines. But the active substances stimulating budbreak in Chinese chive and rakkyo have not yet been identified. The volatile sulfur—containing substances in fresh Chinese chive and rakkyo were identified by GC—MASS. The main volatile substances in Chinese chive and rakkyo were allyl and methyl mercaptans, and dimethyl disulfide, respectively. Cuttings witn a single bud obtained from `Kyoho' vines in dormancy were exposed to vapors of different concentrations of the three compounds for 12 or 24 hr in a desiccator, and they were kept at 25C, mounted on styrofoam plate floated in water. Diallyl disulfide, a main component in garlic, was also tested for comparison. Irrespective of concentrations and exposure periods of sulfide compounds, sprouting was greatly accelerated with diallyl disulfide. In mercaptan homologues, allyl mercaptan accelerated sprouting more effectively than in methyl mercaptan. A solution of 75% dimethyl disulfide accelerated sprouting on exposure for 12 hr, while inhibited budbreak for 24 hr.
Source: HortScience
Authors: Naohiro Kubota, Kazuyoshi Kawazu
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2586989106