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Abstract
Palmarosa (Cymbopogon martinii) is an aromatic crop widely cultivated for its industrially important essential oil in India. The present study was aimed to determine seed germination potential and seedling vigor of Palmarosa varieties: PRC-1, Trishna, Tripta and CIM-Harsh under six substrates viz. filter paper, peat, soil, vermicompost, vermiculite and silica sand in Petri dish at constant temperature of ‘25°C’ with 16h light/8h dark daily regimes. Among substrate, filter paper was found optimally suitable for mean germination percentage (34.2) and mean seedling vigour index I (154.9) while soil for mean seedling vigor index II (0.004009). The mean germination percentage was highest for variety Trishna (36.5 %), and was followed by Tripta (30.2 %) accompanied by the highest mean seedling vigor index I (142.2) for variety Trishna (142.2), and followed by Tripta (126.0). However, variety Tripta has highest mean vigor index II (0.003797), followed by Trishna (0.003689), and CIM-Harsh (0.003562). The finding of this study suggests that growers can use soil/peat/vermicompost as substrate for nursery raising as well as for seed germination testing for their satisfaction while for seed germination testing of Palmarosa varieties for scientific purpose, filter paper would be the best substrate.