| 单词 | abscission layer |
| 释义 | > as lemmasabscission layer abscission layer n. Botany a layer of cells which develops at the base of a pedicel, petiole, etc., and then breaks down, causing the flower, leaf, etc., to fall off; = absciss layer n. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > abscission layer absciss layer1887 abscission layer1904 1904 Bull. Torrey Bot. Club 31 49 The spines of Fouquieria have no vascular tissue..and the abscission layer is nearly at right angles with the axis of the stem instead of being parallel with it. 1950 C. R. Metcalfe & L. Chalk Anat. Dicotyledons I. 545 Before flowers or fruits fall off, a definite abscission layer is formed. 1995 Denver Post 5 Nov. a40/1 Shorter days signal the development of a layer of cells at the base of the leaf, called the abscission layer, that cuts off the water supply. < as lemmas |
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