Abstract
Phytagel™ allowed the production of longer internodes, faster in vitro tuberization, and larger tubers in Solanum tuberosum L. cv. Baraka as compared to Difco Bacto-agar during both an 8-h photoperiod or in darkness. It also allowed a higher tuberization percentage in the dark. Only a 0.2% (wt/vol) Phytagel allowed optimal micropropagation and microtuberization under the photoperiod regime used. Water availability does not account for the observed differences in growth and tuberization between media containing the above gelling agents. In consequence, Phytagel appears as an advantageous alternative to agar for micropropagation and microtuberization.
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