1. Introduction
Transient expression assays are used for quick analysis of genes and regulatory elements in plants. Stable transformation of many plants especially plants of woody nature like roses takes long durations (Durzan, 1990). In the era of genomics when many genes and regulatory sequences are isolated in large numbers, their analysis by stable transformation can be very time and resource consuming (Wroblewski et al., 2005) Even model systems like Arabidopsis. where a quic stable transformation method is available, may take weeks before gene analysis could be carried out (Clough and Bent, 1998) Some plants especially cereals, legumes and woody plants are considered very recalcitrant to transformation and tissue culture and may take a long time before the effect of the transferred