Priming or invigoration is treatments on seeds to enhance and improve the appearance of seeds that germinate. Research on priming was conducted in Indonesian Cereal Research Institute (ICERI) seed laboratory from May 2017 until October 2018 to evaluate the effect of soaking duration in hydropriming on sorghum seed vigor. Seed quality parameters includes germination percentages, germination rate, shoot and primary root length, shoot and root dry weight, electric conductivity of seed leakage. Sorghum seed variety of Numbu and Super1 were used as varieties tested. Results showed that priming treatments significantly effect on increasing germination percentage, germination rate, shoot and root length, shoot and root dry weight. The priming treatment with soaking duration 2 hours has positive significant effect on seed vigor, in terms of germination rate, shoot and root length and shoot and root dry weight, and electrolyte leakage.

Sorghum (Sorghum bicolor L. Moench) is the fifth most important cereal that is widely used for food, feed, and industrial purposes. Sorghum is cultivated mostly in the central and eastern parts of Indonesia. Sorghum seed viability and vigor influence its productivity by affecting crop growth and stand establishment. Invigoration can also be called conditioning or priming, and is one method that could enhance seed germination in the soil under abiotic stress. Some priming methods are hydro priming, osmopriming, and matrix conditioning. This paper will discuss research on sorghum priming which showed that many priming techniques could improve germination performance, speed of germination, and emergence uniformity.

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