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This article in CS

  1. Vol. 9 No. 5, p. 584-586
    Received: Feb 8, 1969

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Seed Dormancy in Two Species of Digitaria from Africa1

  1. Jerry M. Baskin,
  2. S. C. Schank and
  3. S. H. West2



Dormancy in seeds of Digitaria milanjiana (Rendle) Stapf and D. pentzii Stent was investigated by germination tests in the laboratory over a 12-month period. By using intact, dehulled, clipped and chemically treated seeds, dormancy was found to be due to the need for a period of after-ripening in dry storage and to effects exerted by palea aml lemma. The caryopsis itself after-ripens upon storage for 4 to 5 months, and removal of palea and lenmm from 4- to 5-month-old caryopses results in almost complete germination. Good germination can be obtained in seeds stored for shorter periods of time either by removing the seed coat, pericarp and endosperm or by treating dehulled seeds with gibberellic acid.

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