[en] In vitro regeneration of strawberry (Fragaria x ananassa Duch.) plants from adventitious stipular buds allowed us to obtain a new clone differing from the axillary originated clone by its vegetative and reproductive behavior. Besides of its clear and rounded leaves, this clone is characterized by a slower plastochronal rythm corresponding to the production of a greater number of axillary shoots (runners). Furthermore, its flowers have shorter receptacle that does not overstep stamens. At the contrary, receptacle of the axillary clone largely overstep stamens and then, they are not well pollinated and resulted in malformed fruits especially in cold season or in absence of pollen vectors. [fr] La régénération in vitro de plants de fraisier (Fragaria x ananassa Duch. cv. Elsanta) à partir de bourgeons adventifs stipulaires était à l’origine de l’obtention d’un clone dont le comportement végétatif et reproducteur in vivo s’est nettement distingué de celui de son homologue d’origine axillaire. Hormis la couleur claire et la forme arrondie de ses feuilles, ce nouveau clone se caractérise par un rythme plastochronal plus lent qui correspond aussi à la production d’un plus grand nombre de bourgeons axillaires sous forme de stolons. Au niveau floral, le réceptacle est moins allongé et se trouve à la hauteur des étamines dont les anthères sont plus volumineuses que celles du clone axillaire. Ce dernier dont le réceptacle émerge au delà des étamines présente une moins bonne pollinisation qui se traduit par une importante déformation des fruits surtout en hiver et en l’absence d’agents pollinisateurs.
Kevers, Claire ; Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales
Language :
French
Title :
Vegetative and generative behaviour of Strawberry (Fragaria x ananassa Duch.) plants raised from in vitro regeneration of axillary or stipular buds
Alternative titles :
[fr] Comportemement végétatif et génératif de plants de Fraisier (Fragaria x ananassa Duch.) issus de la régénération in vitro à partir de bourgeons axillaires ou stipulaires
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