Chemical Studies in the Physiology of Apples

Brown, Janet W.

doi:10.1093/oxfordjournals.aob.a090009

Cited by 13 publications

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“…on dry weight. Brown (2) has shown that the mineral composition of the fruit of a given variet>of apple varies according to the stock on which the variety is grafted. That grafting a scion on a stock may affect more than the mineral composition of that scion is suggested by the work of Barker and Grovep), who found that the acidity, and probably the tannin content, of apple juice is affected by the type of stock on which the apple is grafted.…”

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IMMUNITY OF POTATO VARIETIES FROM ATTACK BY THE WART DISEASE FUNGUS, SYNCHYTRIUM ENDOB IOTICUM (SCHILB.) PERC.

Roach¹

1927

Annals of Applied Biology

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Summary. It is known that grafting together portions of two different plants is sometimes followed by changes in their chemical contents owing to permeation of each by substances formed in the other. The present investigation is an attempt to determine by grafting together pieces of immune and susceptible plants whether the cause of immunity from wart disease of potatoes is carried by chemical compounds which can traverse unchanged a graft fusion layer or by those which are unable so to do. For this purpose all the eight possible types of plants have been built up by grafting together root, shoot and tuber systems from either immune or susceptible plants. In none of the experiments was the reaction of the tubers towards wart disease seen to be changed. The deduction is therefore drawn that the cause of the immunity is not carried by any compound which is able to traverse the plant. In this way the problem is considerably narrowed down, for it is now possible to eliminate many lines of attack as unlikely to be fruitful. The suggestion is put forward that the examination of the proteins from immune and susceptible varieties by immunochemical methods is the most hopeful future line of attack.

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confidence: 99%