Spin-priming - A novel and a crucial treatment to enhance the seed quality of roselle (Hibiscus sabdariffa) seeds

Seed vigour being an important physiological parameter is important indeed in
medicinal plant like roselle in which it is increased significantly by
standardization of conventional priming (hydro-priming) duration and spinpriming duration of (Hibiscus sabdariffa) then compared with the non - primed
seeds. The standardisation of hydropriming was performed by soaking of seeds
in equal volume of water for various soaking durations viz., 2-5 h and restored to
its initial state of moistness revealed that hydropriming of roselle seeds for 5 h
registered higher physiological seed quality parameters. The best performed
hydropriming duration of 5 h was taken for standardisation of spin - drying
duration by adopting several drying timings viz., 1-5 min. The results indicated
that the seeds hydro-primed (5 h) and spin-dried for 4 min had a significant
improvement in physiological parameters, seed anatomical structure namely
length (8.4 cm) and width (2.33 cm) of the embryo and root growth was seen
evident through root architecture analysis. The % increase in germination over
control in hydro-priming and spin-drying for 5 h and 4 min was 51 and the
expresses the maximum vigour index of 1612.