出典:Wiktionary
出典:『Wiktionary』 (2016/10/31 04:16 UTC 版)
phytoalexin (複数形 phytoalexins)
出典:Wikipedia
出典:『Wikipedia』 (2011/02/21 13:05 UTC 版)
Phytoalexins are antimicrobial substances synthesized de novo by plants that accumulate rapidly at areas of incompatible pathogen infection. They are broad spectrum inhibitors and are chemically diverse with different types characteristic of particular plant species. Phytoalexins tend to fall into several classes including terpenoids, glycosteroids and alkaloids; however, researchers often find it convenient to extend the definition to include all phytochemicals that are part of the plant's defensive arsenal.