Plant Tissue Cult. 2(2) : 129-133, 1992

Short Communication

In vitro Rooting of Jackfruit (Artocarpus heterophyllus) Microcuttings Derived from Mature Trees

Muhammad Nurul Amin

Department of Botany, University of Rajshahi, Rajshahi-6205, Bangladesh

Key words: In vitro rooting, Jackfruit, Microcuttings

Abastract

Successful in vitro proliferation and rooting of shoots and in vivo establishment of jackfruit plantlets have been demonstrated (Rahman 1988; Rahman and Blake 1988). These studies were based on aseptically grown seedlings only. Plantlet regeneration from explants of mature jackfruit plants has also been reported by Roy et al. (1990, 1992). However, their results on rooting are so contradictory that in one report Roy et al. (1990) have claimed 10-37% rooting success if IAA, IBA and NAA (0.5-2.0 mg/1) are used separately and 95% if a mixture of IBA and NAA (1 mg/1) is used. Country to this, IAA, IBA and NAA were found totally ineffective when used separately but interestingly the three auxins together induced 70% (maximum) rooting if they were used at 0.1 mg/1 (Roy et al. 1992). Moreover, the medium containing 30g/1 sucrose produced only about 70% rooting whereas with an increase of sucrose by 5 g/1 in the medium rooting could be enhanced to 95% (Roy et al. 1992). Such a claim needed verification because such a small difference in sucrose level should not make such a marked difference. It was therefore, anticipated that factors other than auxin and sucrose might be responsible for consistent rooting. The present paper describes the effects of etiolation, pH and temperature on rooting of jackfruit microcuttings.

Download Full Article