Promotion of Cocklebur Seed Germination by Allyl, Sulfur and Cyanogenic Compounds |
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| Authors: | Maruyama, Akiko Yoshiyama, Makoto Adachi, Yasuhiro Tani, Akinobu Hasegawa, Ryo Esashi, Yohji |
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| Affiliation: | 1Laboratory of Environmental Science, Botanical Garden, Faculty of Science, Tohoku University North Campus, Kawauchi, Aobaku, Sendai, 980-77 Japan
2Agricultural Science Research Laboratory, Takarazuka Research Center, Sumitomo Chemical Co., Ltd. Takarazuka, 655 Japan |
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| Abstract: | The effects of allyl, sulfur and cyanogenic compounds on thegermination of upper cocklebur (Xanthium pennsylvanicum Wallr.)seeds were examined. Mercaptoethanol and methylmercaptan aswell as KCN, substrates for rßcyanoalanine synthase(CAS), and H2S and thiocyanate, the products of the CAS catalyzingreaction, were effective in promoting germination, suggestingthe involvement of CAS in germination. Most of allyl compounds, especially allylthiourea, as well asethylene which activated CAS [Hasegawa et al. (1994) Physiol.Plant. 91: 141], promoted the germination in an abnormal typewhich occurred by the predominant growth of cotyledons as didC2H4 [Katoh and Esashi (1975) Plant Cell Physiol. 16: 687].However, they failed to activate CAS unlike ethylene, and toliberate free ethylene during an incubation period. It was thuspossible that an C2H4-like double bond within allyl compoundscan act to promote seed germination. (Received June 10, 1996; Accepted August 21, 1996) |
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