Abstract
The intact seeds ofPsoralea corylifolia which are actieually one-seeded fruit, presents a unique problem of dormancy. Germinability of these dormant seeds is not enhanced as a result of a number of treatments: 1) Dry-storage of 44 months under moderate conditions of the laboratory. 2) Periodic germination in different months of the year. 3) Immersion in ethylalcohol (70% and 100%), hydrogen-peroxide, nitric acid, acetone, ether solvent and hydrochloric acid. 4) Removal of pericarp.
Four distinct methods have also been evolved which effectively overcome the dormancy of the seeds: 1) Mechanical puncturing of seedcoverings. 2) Sulphuric acid treatment. 3) High temperature treatment. 4) Weathering of seeds.
Germination-behaviour of the latter 4 lots of seeds is compared and ecological significance of the reported dormancy mechanism is discussed.
Abstract
Semena rostlinyPsoralea corylifolia Linn., která jsou vlastně jednosemennými plody, představují vhodný model studia odpočinku. Přerušení odpočinku bylo dosaženo těmito způsoby: 1) mechanickým napíchnutím obalů semen, 2) ošetřením kyselinou sírovou, 3) působením vysoké teploty, 4) stratifikací semen.
Další metody, kterých bylo k překonání odpočinku semen použito, byly neúčinné: 1) uschování v suchu po 44 měsíců za mírných laboratorních podmínek, 2) postupné klíčení v různých měsících v průběhu roku, 3) ponoření do ethylalkoholu (70% a 100%), peroxydu vodíku, kyseliny dusičné, acetonu, etheru a kyseliny chlorovodíkové, 4) odstranění perikarpu.
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Shukla, S.P. Heat-treatment dependent dormancy in seeds ofPsoralea corylifolia Linn. . Biol Plant 13, 88–99 (1971). https://doi.org/10.1007/BF02936825
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DOI: https://doi.org/10.1007/BF02936825