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This article in AJ

  1. Vol. 60 No. 1, p. 81-84
     
    Received: June 6, 1967
    Published: Jan, 1968


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doi:10.2134/agronj1968.00021962006000010026x

Effect of Seed Pod and Temperature on Speed of Germination and Seedling Elongation of Sainfoin (Onobrychis viciaefolia Scop.)1

  1. A. E. Carleton,
  2. C. S. Cooper and
  3. L. E. Wiesner2

Abstract

Abstract

Optimum temperatures for germination of sainfoin seed and for seedling growth were determined in conjunction with studies of the effect of the presence or absence of the seed pod. Optimum temperature range for germination of sainfoin was from f5 to 20 C. A higher range of optimum temperature, 20 to 30 C, was found for seedling growth. The presence of pods at all temperatures reduced speed of germination and speed of seedling elongation. Pods on the seed slowed water absorption by 4 to 5 hr. A water soluble inhibitor which slowed the speed of germination of shelled seed was detected. This inhibitor was readily removed from the pod by washing. Mechanical restriction of germination by the pod appeared to be a minor factor in the total effect of the pod on speed of germination. There was no difference in field emergence rates of sainfoin seedlings from shelled and unshelled seed.

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