单词 | abscission zone |
释义 | > as lemmasabscission zone abscission zone n. Botany the zone in which the abscission layer develops at the base of a pedicel, petiole, etc. ΚΠ 1906 Bot. Gaz. 42 338 When the ovule breaks off, the slight protuberance at the base is due to the shape of the abscission zone. 1960 K. Esau Anat. Seed Plants xviii. 274 Two layers may be discernible in the abscission zone: an abscission, or separation, layer, in which structural changes facilitate the separation of the leaf, and a protective layer. 2006 Plant Sci. 171 277/2 When seeds desiccate, the water supply from the maternal plant may be blocked by an abscission zone, and the water in the cells diffuses into the air. < as lemmas |
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