Plantain ( Musa x paradisiaca L., AAB genomic group) is a useful
supplement to the nutritional balance of populations in developing
countries. The objective of this study was to improve the
multiplication rate of in situ plantain (Musa x paradisiaca L.) seeds
through the supply of substances with cytokinin activity. Suckers of 10
cm height and related to the parent plant, called strain-suckers, were
used to produce shoots. The pseudo-trunk of plantain tree was
decorticated, then the apical meristem extracted. Four milliliters of
each substance (6-Benzylaminopurine (BAP)\ua0; Kin\ue9tine and
Coconut water) were introduced in the cavity left by the extracted
meristem. For each substances, the effect of the diameter of
first-generation strain-suckers (d < 9; 9 < d < 12 cm and d
> 12 cm) was tested. This operation was repeated once so as to have
the second and third generations. BAP induced the highest number of
buds after three generations. The optimal concentration of BAP was 40
mg L-1. Similarly, all concentrations of coconut water stimulated
production of seedlings. Among different diameters of strain-suckers,
the largest number of buds was induced with strain-suckers larger than
9 cm in diameter. The production of leafy shoots varied greatly,
depending on the solutions tested and the size of strain-suckers used.
After 3 to 4 months, seedlings obtained were ready to be transferred in
the field.L\u2019objectif principal de la pr\ue9sente \ue9tude est
d\u2019am\ue9liorer le taux de multiplication des semences in situ
de bananier plantain ( Musa x paradisiaca L.) par apport de
substances \ue0 activit\ue9 cytokinine. Les rejets ba\uefonnettes
de plus de 10 cm de haut et li\ue9s \ue0 la plante m\ue8re ont
\ue9t\ue9 r\ue9pertori\ue9s et appel\ue9s souche-rejets. Le
pseudo tronc de ces derniers a \ue9t\ue9 d\ue9cortiqu\ue9 puis
le m\ue9rist\ue8me apical extrait. Dans la cavit\ue9 laiss\ue9e
par l\u2019extraction du m\ue9rist\ue8me, 4 ml des solutions de
Benzylaminopurine (BAP)\ua0; de Kin\ue9tine (Kin) ou de l\u2019eau
de coco y ont \ue9t\ue9 introduites. Cette op\ue9ration a
\ue9t\ue9 r\ue9p\ue9t\ue9e de sorte \ue0 disposer des
rejets de deuxi\ue8me et troisi\ue8me g\ue9n\ue9ration. La
substance induisant le plus grand nombre de bourgeons a ensuite
\ue9t\ue9 utilis\ue9e pour tester diff\ue9rents diam\ue8tres
de rejets (d < 9 cm\ua0; 9 < d < 12 cm et d > 12 cm). La
BAP a permis d\u2019induire le plus grand nombre de bourgeons
apr\ue8s trois g\ue9n\ue9rations. La concentration optimale de
BAP a \ue9t\ue9 de 40 mg L-1. De m\ueame, le lait de coco a
permis de stimuler la production de plantules. Parmi les
diff\ue9rents diam\ue8tres de rejets, le nombre moyen le plus
important de bourgeons a \ue9t\ue9 induit avec les rejets de
diam\ue8tre sup\ue9rieur \ue0 9 cm. La production de pousses
feuill\ue9es a vari\ue9 fortement selon les solutions test\ue9es
et la taille des rejets utilis\ue9s. Au bout de 3 \ue0 4 mois les
plantules obtenues sont pr\ueates \ue0 \ueatre
transf\ue9r\ue9es au champ