plants-vr-tropical-03-cocoyam - rainy season and the corms...

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Vegetative reproduction (tropical) 3 Vegetative reproduction - the cocoyam Corms - the cocoyam The structure of a corm is described on p. 4 of ‘Vegetative reproduction’. Formed in the lower part of a stem, it is swollen with food reserves and bears a terminal bud and lateral buds. A familiar tropical corm is the ornamental cocoyam ( Caladium ) shown below, and the example illustrated on the right is the (edible) cocoyam ( Xanthosoma ). Life cycle . The life cycle of corms is described on p.5 of ‘Vegetative reproduction’. The account there applies equally well to the cocoyam but the seasons are not appropriate to tropical climates. Cocoyams are planted at the beginning of the
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Unformatted text preview: rainy season and the corms are harvested for food about 8 months later. Xanthosoma corm in July D.G. Mackean leaf stalk this seasons corm forming contractile root this seasons daughter corm last seasons daughter corm Caladium corm in July Section through Caladium corm daughter plant old corm planted on its side lateral bud daughter plant formed from lateral bud terminal bud has not sprouted adventitious roots old leaf bases this seasons com will grow here contractile root last seasons corm adventitious root new corm formed last season by lateral bud lateral bud last seasons corm lateral bud corm of 2 seasons ago...
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This note was uploaded on 11/29/2011 for the course BIO 218 taught by Professor Young during the Fall '11 term at BYU.

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