Seed priming with different levels and sources of zinc on the seed germination and seedling growth of barnyard millet (Echinocola frumentacea)

Abstract

Seed priming with zinc increases the seed germination and seedling growth of many crops. The present study aimed to investigate the effect of seed priming with different levels and sources of zinc on seed germination and seedling growth of barnyard millet variety MDU1. A germination experiment was conducted with various Zn sources and concentrations viz., T1- Non-primed seeds (control); T2-water priming; T3-GA3 priming; T4-T6: seed priming with 0.10%,  0.25% & 0.50% ZnSO4 ; T7- T9:  seed priming with 0.10%, 0.25% & 0.50% Zn EDTA; T10-T12: seed priming with 0.10%, 0.25% & 0.50% Zn citrate and the experimental design was a completely randomized design (CRD) which were replicated five times. The seeds of MDU1 variety were treated with different sources and levels of Zn for 12h and the seed germination study was carried out for 15 days. After 15 days, the germination percentage, speed of germination, germination energy, germination index and the seedling growth parameters such as, root length, shoot length, vigour index and seedling dry weight were recorded. Seed priming with 0.50% ZnSO4 performed better in increasing the germination percentage (99%), speed of germination (76.2%), germination energy (69.4%), germination index (3.91) and seedlings growth parameters like shoot length (14.7cm), root length (16.5cm), seedlings dry weight (0.44g), vigour index I (3099) and II (44.6),  Zn content (21.9 mg kg-1) & its uptake (5.54 mg g-1). This was closely followed by seed priming of Zn EDTA at 0.25% and Zn citrate at 0.50%. From this study, it can be concluded that seed priming with 0.50% ZnSO4 could be used to improve the germination and seedling growth of barnyard millet which was also economical.