المستخلص: |
Combination of six different media (CH, DP, LS, MS, MT and N) and two hormone treatments (BAP alone at 2.25 mg.l-1 and combination of BAP at 3.25 plus IAA at 1.75 mg.l-1) were tested for its effect on the shoot formation and shoot length and weight of Smooth cayenne pineapple over three different incubation periods (30, 60 and 75 days). The optimum media varied according to the parameter used for assessment and hormone treatment. After 30 days of incubation, the highest shoot formation (7 shoots) obtained in MT enriched with BAP alone and LS enriched with combination of BAP and IAA while after 60 days the highest shoot formation (9 shoots) obtained in CH, MS and MT media enriched with BAP alone. After 75 days, CH medium enriched with combination of BAP and IAA resulted in the highest shoot formation (14 shoots). For production of tallest and heaviest shoots shorter incubation of 30 days and MT medium enriched with combination of BAP and IAA was the best choice (11mm, 0.36 g). MS which is the most commonly used medium was at all parameters and irrespective of the hormone treatments and incubation periods inferior than the other media. Recommendation of certain medium type for pineapple should be restricted to the intended length of incubation period and the growth parameter of major interest.
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