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«“√ “√ √“™∫— ≥±‘ µ¬ ∂“π ªï ∑’Ë Û ©∫— ∫∑’Ë Û °.§.-°.¬. ÚıÙ¯ 635 “¬™≈ ‡°µÿ …“ Absorbance at 760 nm 0 1 2 3 Hours after Impact 0.7 0.6 0.5 0.4 0.3 0.0 0.2 0.1 √Ÿ ª∑’Ë Û °“√‡ª≈’Ë ¬π·ª≈ߪ√‘ ¡“≥ “√øï πÕ≈‘ ° „π‡ª≈◊ Õ°º≈¡— ߧÿ ¥«— ¬ ’ ¡à «ß∫√‘ ‡«≥∑’Ë ‰¡à ¡’ °“√µ°°√–∑∫ ( ✑ ) ·≈–∫√‘ ‡«≥∑’Ë ¡’ °“√µ°°√–∑∫ ‚¥¬Õ¬Ÿà „π ¿“æ¢Õß∫√√¬“°“»∑’Ë ¡’ ÕÕ°´‘ ‡®πª√°µ‘ ( ✑ ) ·≈–‰¡à ¡’ ÕÕ°´‘ ‡®π ( ✑ ) À≈— ß°“√µ°°√–∑∫ (®“° Ketsa and Atantee, 1998) √Ÿ ª∑’Ë Ù ¢—È πµÕπ°“√ — ߇§√“–Àå ≈‘ °π‘ π„πæ◊ ™‡¡≈Á ¥‡ª≈◊ Õ¬ (gymnosperm) ·≈–æ◊ ™¥Õ° (angiosperm) (®“° Whetten and Sederoff, 1995) phenylalanine phenylalanine ammonia lyase (PAL) cinnamic acid p -coumaric acid p -coumaric CoA p -coumaryl aldehyde p -coumaryl alcohol Gymnosperm caffeic acid ferulic acid feruloyl CoA coniferyl aldehyde cinnamyl alcohol dehydrogenase (CAD) coniferyl alcohol peroxidase (POD) lignin O 2 Angiosperm sinapic acid sinapoyl CoA sinapyl aldehyde sinapyl alcohol