Letter | Published:

Origin of Viruses

Nature volume 155, pages 115116 (27 January 1945) | Download Citation



IN recent times two abnormalities have arisen in the apple Lord Lambourne when this variety has been grafted on to certain other kinds: (1) where the branches and growth lack rigidity, so that the weight of even a few fruits pulls the branches almost vertically to the ground, (2) where the fruit only develops about a quarter of normal size. Thus when Lambourne has been grafted on to the variety Excelsior, Lambourne has developed non-rigid growth, and when grafted on to Redcoat Grieve it has developed the small-fruit abnormality. The same reactions have occurred in Lambourne when it has been grafted on to certain other kinds.

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  1. 1.

    , The Grower, 22, 53 (1944).

  2. 2.

    , Nature, 154, 166 (1944).

  3. 3.

    , and , Proc. Roy. Soc., B, 106, 140 (1930).

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  1. John Innes Horticultural Institution, Merton, London, S.W.19. Dec. 18.

    • M. B. CRANE


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