Effect of seed priming as pre-treatment factors on germination and seedling vigor of tomato

This study investigated the germination and seedling vigor of tomato seeds cultivar BCT-25 under different priming treatments with the objective of enhancing the crop establishment under field conditions. We primed seeds with Moringa leaf extract for 18 hours; 1% NaCl for 36 hours; 10% Polyethylene glycol (PEG) for 12 hours; 100 ppm GA 3, 5% KNO 3 (under dark conditions), and 1000 ppm Thiourea for 24 hours; distilled water for 12 hours; 2% KH 2 PO 4 and 93 ppm NAA (at 4°C) for 6 hours and the control (T 0).

All the treatments improved the seed germination and seedling vigor; however, we found the highest vigor from hydro priming followed by KH 2 PO 4 in both years, in contrast with the minimum vigor index from T 0. The highest mean germination percentage was found with hydro priming (T 7), followed by T 8, T 1, T 2, and T 3 during both years, while the lowest average germination percentage was recorded for T 0. The highest magnitude of seedling emergence under field conditions was recorded with hydro priming, i.e., 89.67% in the first and 86.67% in the second year, followed by T 8, T 1, and T 2, while it was lowest for T 0 under laboratory condition.

Hydro priming had the highest field vigor indexes of all other treatments. Hydro-priming and KH 2 PO 4 had the best performance of other priming treatments. But, in some cases, the hydro-priming and KH 2 PO 4 were similar in both laboratory and field conditions. We concluded that during the initial stage of plant growth, hydro-priming and KH 2 PO 4 had the best responses compared to other priming treatments.

Read the complete research at www.researchgate.net.

Ray, Jui & Bordolui, Sanjoy. (2022). Effect of Seed Priming as Pre-Treatment Factors on Germination and Seedling Vigour of Tomato. International Journal of Plant & Soil Science. 34. 302-311. 10.9734/IJPSS/2022/v34i2031156. 

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