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Observations on Penetration of Linden Branches by Stylets of the Aphid Longistigma caryae

1968; Wiley; Volume: 55; Issue: 7 Linguagem: Inglês

10.2307/2440974

1537-2197

R. F. Evert, Walter Eschrich, J. T. Medler, Frank J. Alfieri,

Plant Parasitism and Resistance

American Journal of BotanyVolume 55, Issue 7 p. 860-874 Article OBSERVATIONS ON PENETRATION OF LINDEN BRANCHES BY STYLETS OF THE APHID LONGISTIGMA CARYAE R. F. Evert, R. F. Evert University of Wisconsin and Universität BonnAddress: Department of Botany, University of Wisconsin, Madison.Search for more papers by this authorW. Eschrich, W. Eschrich University of Wisconsin and Universität BonnAddress: Pharmakognostiches Institut der Universität, 53 Bonn, Nussallee 6, Germany.Search for more papers by this authorJ. T. Medler, J. T. Medler University of Wisconsin and Universität BonnAddress: Department of Entomology, University of Wisconsin, Madison.Search for more papers by this authorF. J. Alfieri, F. J. Alfieri University of Wisconsin and Universität BonnPresent address: Department of Biology, California State College at Long Beach, California 90804.Search for more papers by this author R. F. Evert, R. F. Evert University of Wisconsin and Universität BonnAddress: Department of Botany, University of Wisconsin, Madison.Search for more papers by this authorW. Eschrich, W. Eschrich University of Wisconsin and Universität BonnAddress: Pharmakognostiches Institut der Universität, 53 Bonn, Nussallee 6, Germany.Search for more papers by this authorJ. T. Medler, J. T. Medler University of Wisconsin and Universität BonnAddress: Department of Entomology, University of Wisconsin, Madison.Search for more papers by this authorF. J. Alfieri, F. J. Alfieri University of Wisconsin and Universität BonnPresent address: Department of Biology, California State College at Long Beach, California 90804.Search for more papers by this author First published: 01 August 1968 https://doi.org/10.1002/j.1537-2197.1968.tb07443.xCitations: 18 AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Penetration of the bark of Tilia americana L., the linden tree, by Longistigma caryae (Harr.) is mainly intracellular. Like other aphids, L. caryae secretes a saliva sheath which encloses the path of the stylets, beginning with an external collar of sheath material on the surface of the periderm. Stylet sheaths within the bark gave positive reactions for callose, suggesting that, in reaction to wounding, punctured parenchyma cells secrete callose which diffuses throughout the stylet sheaths. Other, more conspicuous effects of wounding included: proliferation and enlargement of cells of the cortex and dilated rays bordering some stylet sheaths, formation of tylosoids in punctured sieve elements, deposition of massive amounts of callose in penetrated sieve elements and in sieve elements bordering penetrated cells, and stimulation of cambial activity and xylem differentiation. Stylet tips located in living sieve elements projected beyond their sheaths which terminated outside the sieve-element walls. It is suggested that such sieve elements can be considered to be functional. None of the living sieve elements containing stylet tips showed any signs of injury which could be attributed to the presence of the stylets. Stylet tips of feeding aphids were found in living sieve elements of both 1965 and 1966 phloem increments clearly indicating that L. caryae can feed on linden sieve elements more than 1 year of age. Citing Literature Volume55, Issue7August 1968Pages 860-874 RelatedInformation