Some observations on polarity and regeneration inEnteromorpha

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Abstract
The regeneration of two types of Enteromorpha has been investigated. Small tubular sections cut from the thallus develop rhizoids along the basal cut edge and papillae from the apical cut edge. The capacity for regeneration is greatest in segments from the middle and base of the thallus and least in apical sections. Regeneration in various liquid culture media at different light intensities and temperatures and on solid agar media has been tested. The addition of growth substances and extracts from Enteromorpha thalli always stimulate regeneration but in no way alter the polarity. The results are compared with previous conflicting accounts of regeneration of Enteromorpha.

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