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Glyco-enhancer of Plant Fertilization: AMOR



 In plants, "pollen tube attractants" are essential for the pollen tube to reach the ovule. However, the mechanism for how pollen tubes responds to the attractant has not been elucidated. It has however, been hypothesized that the pistil secretes various activators to render the pollen tube fertile.
 Prof. Higashiyama and Dr. Mizukami at ITbM (Institute of Transformative Bio-Molecules, Nagoya University) and their colleagues have recently discovered a sugar chain involved in this bio-function using Torenia, and named it "AMOR".

Activation by AMOR

 AMOR (Activation Molecule for Response-capability) features the sugar chain arabinogalactan which is uniquely found in plant cell walls. The terminal disaccharide structure, methyl-glucuronic acid and galactose beta binding structure (GlcA[4Me]β(1-6)Gal), is important in the plant cell-to-cell communication. Additionally, the AMOR disaccharide structure exists in various organs in plants.
 TCI has recently developed AMOR production technology though the chemical synthesis of these important glycans.


• Terminal disaccharide structure of arabinogalactan
• Pistil-derived sugar chain which enhances fertilizing capacity to pollen tube
• Enhances the activity and efficiency of plant fertilization
• Prepared by chemical synthesis

Movies (activation of pollen tube)

Responsive pollen tube with AMOR
Non responsive pollen tube without AMOR

(Pictures and movies are provided by Prof. Tetsuya Higashiyama at Nagoya University.)

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This material was produced by collaboration with Prof. Tetsuya Higashiyama at ITbM, Nagoya University.

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