Chemical compositions of exudates from succulent plants induced by methyl jasmonate |
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| Authors: | Ueda Junichi Miyamoto Kensuke Saniewski Marian Hoshino Tomoki Utsunomiya Maki Okubo Hiroshi |
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| Institution: | (1) College of Integrated Arts & Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, 599-8531 Sakai, Osaka, Japan;(2) Research Institute of Pomology and Floriculture, 96-100 Skierniewice, Poland;(3) Faculty of Agriculture, Kyushu University, 6-10-1 Hakozaki, 812-8581 Fukuoka, Japan |
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| Abstract: | Methyl jasmonate (JA-Me) promoted leaf abscission of succulent plant, Crassula lycopodioides, and exudation from stems and leaves after leaf abscission when it was sprayed in whole plants. Major component of the exudate
was identified as sucrose based on the results described below.
| (1) |
The reaction of the excudate was not positive in the Somogyi-Nelson method but in the phenol-sulfuric acid method.
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| (2) |
The exudate was hydrolyzed with invertase of Candida utilis, after that showing a positive reaction in the Somogyi-Nelson method.
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| (3) |
Only glucose and mannose were identified in the exudate after hydrolysis with trifluoroacetic acid using a gas-liquid chromatograph
(GLC).
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| (4) |
A single peak corresponding to the retention time of sucrose was observed using a high performance liquid chromatograph (HPLC).
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In addition, potassium and sodium were found in the exudate as major inorganic cations. These results suggest that exudate
of Crassula lycopodioides is phloem sap, and JA-Me promotes the excudation due to the inhibition of the synthesis of callose in sieve tubes of succulent
plants. |
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| Keywords: | amino acid cation Crassula lycopodioides exudate Kalanchoe tubiflora leaf abscission methyl jasmonate succulent plant sucrose sugar |
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