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Original Articles

Quelques aspects du métabolisme des glycosphingolipides des styles et du pollen chez Petunia hybrida, espèce auto-incompatible

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Pages 69-77 | Published online: 08 Feb 2017
 

Résumé

La participation des glycosphingolipides au métabolisme particulier présenté par l'incompatibilité gamétophyique chez Petunia hybrida, espèce auto-incompatible, est envisagée. La distribution et l'évolution des glycosphingolipides totaux, acides et neutres, sont analysées dans les pollens et les styles (vierges, auto et xénopollinisés) par de nombreuses techniques chromatographiques et fluorimétriques en fonction de la pollinisation compatible et incompatible. La composition en acides gras des glycosphingolipides neutres montre l'importance de la participation des glycosphingolipides dans le métabolisme de l'incompatibilité.

Summary

The participation of glycosphingolipids in the metabolism of the gametophytic incompatibility reaction in the self-compatible species Petunia hybrida has been investigated. The distribution and the concentration changes of total glycosphingolipids, as well as the acid and neutral fractions, were analyzed in the pollen and styles after self- and cross-pollination. These were compared to the glycosphingolipids composition of unpollinated styles. The composition of the fatty acids of the neutral glycosphingolipids changed dramatically, so that the involvement of these substances in the metabolism of the incompatibility reaction seems possible.

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