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Phenology of Flowering and Starch Accumulation in Grape (Vitis vinifera L.) Cuttings and Vines

G. LEBON, E. DUCHÊNE, O. BRUN and C. CLÉMENT
Annals of Botany
Vol. 95, No. 6 (May 2005), pp. 943-948
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/42796138
Page Count: 6
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Phenology of Flowering and Starch Accumulation in Grape (Vitis vinifera L.) Cuttings and Vines
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Abstract

• Background and Aims A reliable protocol for flowering and fruiting in cuttings was developed with the aim of (a) studying inflorescence and flower development in grapevine cuttings and field plants, and (b) assisting haploid plant production. • Methods Inflorescence and flower development was studied in 'Gewurztraminer' (GW) and 'Pinot Noir' (PN) grape vines and cuttings grown in a glasshouse, along with variations in starch in the flowers. As there is a strong relationship between flower development and starch, the starch content of reproductive structures was estimated. • Key Results Inflorescence and flower development were similar in the vines and cuttings with consistent differences between the two cultivars. Indeed, the ontogenesis of male and female organs is not synchronous in GW and PN, with both female and male meiosis occurring earlier in PN than in GW. Moreover, changes of starch reserves were similar in the two plant types. • Conclusions Cuttings have a similar reproductive physiology to vines, and can be used to study grape physiology and to develop haploid plants.

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