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AOBPreview originally published online on March 24, 2004
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Annals of Botany 93: 581-590, 2004
© 2004 Annals of Botany Company

Interaction Between Vitis vinifera and Grape Phylloxera: Changes in Root Tissue During Nodosity Formation.

ALISON V. KELLOW*,1,2, MARGARET SEDGLEY1 and ROBYN VAN HEESWIJCK{dagger},1,2

1 The University of Adelaide, Department of Horticulture, Viticulture and Oenology, PMB 1 Glen Osmond 5064, Australia and 2 The Cooperative Research Centre for Viticulture, PO Box 154 Glen Osmond 5064, Australia

* For correspondence. Present address Museum of New Zealand Te Papa Tongarewa, PO Box 467, Wellington, New Zealand. E-mail: alisonk{at}tepapa.govt.nz
{dagger} Deceased September 2003.

Received: 11 July 2003; Returned for revision: 17 October 2003; Accepted: 23 January 2004 Published electronically: 24 March 2004

• Background and Aims The interaction between the gall-forming grapevine parasite, phylloxera, and the susceptible grapevine species Vitis vinifera was investigated.

• Methods Phylloxera and grapevines were cocultivated using both potted and micropropagated grapevines. Development of nodosities on primary roots was studied by microscopy and histochemistry, and nodosities were analysed for biochemical changes and changes in gene expression.

• Key Results Within a nodosity, phylloxera fed at a site in the root cortex. Nodosity development was characterized by swelling of the root tissue distal to the feeding site, lack of development of a suberized endodermis, and starch and amino acid accumulation, and was eventually followed by root necrosis. No evidence of a defence response was observed in pre-necrotic nodosities, but defence-type responses were observed in tissue adjacent to necrotic regions. Changes in gene expression were not detected by northern hybridization using DNA probes encoding a range of V. vinifera transcripts.

• Conclusions Nodosities on V. vinifera potentially function as nutrient reservoirs, and defence responses to phylloxera attack were not detected.

Key words: Daktulosphaira vitifoliae, phylloxera, Vitis vinifera, grapevine, nodosity, gall formation.


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