Author:
Singh Hardev,Bedi Krishna
Abstract
Ipomoea pentaphylla Jacq. is a twining, hirsute annual. After infection by Albugo ipomoeae-panduranae (Schw.) Swingle, two types of galls develop on the stem—bud and cerebriform. The bud gall originates from an infected bud while the cerebriform gall arises from the internode. The two types are distinct from each other in their morphology, anatomy, rate of development, and morphogenesis. The bud gall is of the organoid type while the cerebriform gall is of the histioid type. Tissues of the bud gall grown under in vitro conditions give rise to a structure like the cerebriform gall. The very distinct morphology of the two types has been interpreted on the basis of the possible organizing influence of the shoot apical meristem.
Publisher
Canadian Science Publishing