Vol. 43

Title:
The Adventitious Rooting of Vegetative Cuttings Using Hydropropagation

Author:
R.I. Wilkinson

pp: 41-47

Abstract:
INTRODUCTION

Cuttings need external conditions that will minimise stress, if they are to survive and form roots (Elliot and Jones, 1980) These conditions involve water, temperature, light and oxygen Protecting the cutting from water stress is usually achieved by misting or fogging Temperature is often regulated so that the rooting medium is 5 to 10C warmer than the aerial temperature. High light intensity can result in overheating of the cutting and consequently shading is preferable, particularly under glass Oxygen is essential for root formation (Zimmerman, 1930) and poor aeration conditions due to waterlogging will lead to death of cuttings Factors such as the use of rooting hormones (auxins) (Thomas, 1982) and slow-release fertiliser in the rooting medium (Carter, 1985) can promote quicker rooting of cuttings.

Boland and Hanger first described the concept of hydroponic propagation (Boland and Hanger, 1991). The system potentially overcame water stress by standing the cuttings in

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