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- W1989497478 abstract "1. A study was made of the mechanism of dehiscence of the capsules in three varieties of flax (Linum usitatissimum L.): Punjab 47, an indehiscent variety; Marine, a semidehiscent one; and Coimbricum (C.I. 761), a completely dehiscent one. 2. Ovary development is the same in all three varieties up to the time of fertilization. A major difference in the varieties is the anatomical rearrangement of the third layer of cells of the pericarp after fertilization. The greatest dehiscence is associated with a radial elongation and the least with a tangential elongation of these cells. In the semidehiscent variety the cells are intermediate in direction of elongation. 3. Cells in areas of dehiscence contain large amounts of hemicellulose and pectic substances. Preceding dehiscence there is, in all three varieties, a softening of the cell walls and of the middle lamella which results from a change in the hemicellulose of the cell wall and in the pectic substances of the middle lamella during ripening. When sufficient tension develops, the individual cells are separated or the cell walls are broken. During separation a film of hemicellulose-pectic material may be seen between cells. 4. The physical and chemical properties of the cellulose and hemicellulose of the cell wall allow considerable imbibition. The degree of imbibition has an effect on the amount of dehiscence. Measurement of the diffusion pressure deficit of the walls showed a slightly greater value for the dehiscent variety than for the semidehiscent variety. 5. There is splitting of the capsule wall and rupture of the cuticle in the semidehiscent variety. The cuticle and the capsule wall remain intact in the indehiscent variety. It is this fact which should make the indehiscent variety more profitable to grow from the stand-point of relative damage to seeds by water absorption before harvest." @default.
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- W1989497478 date "1956-06-01" @default.
- W1989497478 modified "2023-09-26" @default.
- W1989497478 title "Factors in Dehiscence of the Flax Fruit" @default.
- W1989497478 doi "https://doi.org/10.1086/335917" @default.
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