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Phenol gradients in opposing cells of Prunus heterografts

W. Feucht and D. Treutter
Advances in Horticultural Science
Vol. 5, No. 3 (1991), pp. 107-111
Stable URL: http://www.jstor.org/stable/42881595
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Phenol gradients in opposing cells of Prunus heterografts
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Abstract

One-year-old grafts of Prunus avium (scion) on Prunus cerasus (rootstock) were sampled at the beginning of July when slight symptoms of leaf yellowing appeared. Phenols were analyzed from the stem portions 0-3 mm above and below the union respectively. Steep gradients between scion and rootstock were formed by genistin, prunin, isosakuranin, chrysin-7-glucoside and dihydrowogonin-7-glucoside, all of them being higher in amounts in the scion. Prunetin-5-glucoside, tectochrysin-5-glucoside and pinostrobin-5-glucoside were found only in the rootstock. Some flavanols accumulated more strongly in the scion as compared with the rootstock. The presence of steep phenol gradients in the opposing cells of Prunus grafts favours the view that slight and delayed incompatibility might be caused by those phenols which move outwards from their original compartments.

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