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Othmani A., Collin Myriam, Sellemi A., Jain S. M., Drira N., Aberlenc Bertossi Frédérique. (2017). First reported case of spontaneous hermaphrodism in female date palm (Phoenix dactylifera L.), cv 'Alligue'. Journal of Horticultural Science and Biotechnology, 92 (4), 376-388. ISSN 1462-0316

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Lien direct chez l'éditeur doi:10.1080/14620316.2017.1280379

Titre
First reported case of spontaneous hermaphrodism in female date palm (Phoenix dactylifera L.), cv 'Alligue'
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000403023500005
AuteursOthmani A., Collin Myriam, Sellemi A., Jain S. M., Drira N., Aberlenc Bertossi Frédérique.
SourceJournal of Horticultural Science and Biotechnology, 2017, 92 (4), p. 376-388. ISSN 1462-0316
RésuméThe date palm (Phoenix dactylifera L.) is dioecious with male flowers deficient in functional gynoecium and female flowers deficient in functional androecium borne on separate palms. The presence of male and female flowers on the same plant, a phenomenon known as monoecy, is unusual in male date palms. This study reports for the first time on hermaphrodite (bisexual) flowers borne by two female date palms, 'Alligue', that were found growing in an open field in Degache, southern Tunisia. The observations on these two female palms were compared with hermaphrodite male date palms growing in the same location. Hermaphrodite female date palm inflorescence branches bear female flowers predominantly near their base, in contrast to the hermaphrodite flowers that are found primarily toward their upper part. The position of the hermaphrodite flowers in hermaphrodite male date palms is reversed: inflorescence branches bear male flowers toward the upper part while the hermaphrodite flowers are found at the base. Histological examination of female hermaphrodite flowers revealed that they had three carpels and 1-6 stamens. Hermaphrodite flowers on male plants were usually also composed of three carpels of variable size, and six stamens. Hermaphrodite flowers on both female and male palm trees turn generally into parthenocarpic fruits. The present data support the theory that dioecious plants are derived from a common hermaphrodite ancestor. Floral hermaphroditism in date palm should be investigated in relation to the in planta self-fertilization process to identify sex markers and genes that control sex organ development.
Plan de classementSciences du monde végétal [076]
LocalisationFonds IRD [F B010070148]
Identifiant IRDfdi:010070148
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010070148

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