. Annals of applied biology. Biology, Economic; Biochemistry. 412 A Tomato Canker In the fruit a similar disorganisation of cells takes place, but the hypodermal cells at the edge of the injured tissue begin to divide actively (Fig. 2) and sometimes form a complete layer of new cells under the disorganised tissue (Fig. 3); this accounts for the convex contour of the canker. Sorauer(5) has illustrated a similar condition as a result of hail injury; it is probable therefore that the multiplication of cells is not due directly to the action of the organism but to the presence of dead tissue in th
. Annals of applied biology. Biology, Economic; Biochemistry. 412 A Tomato Canker In the fruit a similar disorganisation of cells takes place, but the hypodermal cells at the edge of the injured tissue begin to divide actively (Fig. 2) and sometimes form a complete layer of new cells under the disorganised tissue (Fig. 3); this accounts for the convex contour of the canker. Sorauer(5) has illustrated a similar condition as a result of hail injury; it is probable therefore that the multiplication of cells is not due directly to the action of the organism but to the presence of dead tissue in the rapidly growing Fig. 3. Section through lesion on fruit, showing complete layer of actively dividing cells. The nuclei in the affected cells become much hypertrophied, be- coming five or six times the size of nuclei in healtby cells. The nucleolus becomes very large and vacuolate, and the nucleolar membrane dis- appears. There are frequently two nuclei in a cell or two nucleoli in one nucleus, the latter frequently irregular or lobed, being similar in shape to nuclei dividing amitotically as found by Smith(4) in crown gall lesions; but there was no clear evidence that the nuclei were dividing in this Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Association of Applied Biologists; Association of Economic Biologists. [Wellesbourne, Warwick, etc. ] Association of Applied Biologists [etc. ]
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