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Crop Science Abstract -

Non-Translocation of Temperature-Induced Self-Compatibility Substances(s) in Alsike Clover, Trifolium Hybridum L.1


This article in CS

  1. Vol. 8 No. 4, p. 493-495
    Received: Mar 18, 1968

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  1. C. E. Townsend2 and
  2. R. E. Danielson3



Air temperature had a marked effect but soil temperature had no effect on the self-compatibility response of tetraploid alsike clover, Trifolium hybridum L., clone 3-7B. Flowering stems of propagules of tetraploid clone 3-7B and diploid clones 6-5 and 7-1 were arranged to form two groups per propagule. One group was subjected to an air temperature of 32 C and the other to an air temperature of 23 C. Thus the flowering stems of each propagule were exposed to two air temperatures simultaneously. Percentage of florets setting seed for such propagules was dependent upon the air temperature at which the flowering stems were held. At 23 C the propagules were self-incompatible, but at 32 C the compatibility reaction changed to one of considerable self-compatibility. We concluded that the substance (s) responsible for the change in the compatibility reaction was not translocated from one flowering stem to another on the propagule.

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