Abstract
the priming is a technique that involves the controlled hydration of seeds up to allows the start of germination preparatory processes without permit radicle protrusion. The aim of this study was to evaluate the effect of different procedures of priming on physiological potential of rice seeds. Seeds of rice cultivars Puita Inta Inov CL and CL, each represented by a lot were used. The treatments consisted of: control, hydropriming, priming with Stimulate®, boric acid solution and zinc sulfate solution, with four replications. Prior to priming, the seeds hydration curves were determining. After priming, the seeds evaluated for germination, seedling growth, efficiency of use of the endosperm, germination at lowest temperatures and seedling emergence. Priming procedures used in this study does not improve rice seed physiological potential, of cultivars Puita Inta CL and Inov Cl. Seed priming with boric acid has a negative effect on seed performance.
Highlights
Seed priming is a technique that comprises controlled seed hydration to achieve a sufficient level to enable the preparatory processes essential for germination, without allowing protrusion of the primary root
Rice seed priming with Stimulate® at 0.5 L-1 100 kg-1 seed, priming with boric acid solution at 0.008 M (JOHNSON et al, 2005) and priming with zinc sulfate solution at 0.004 M (JOHNSON et al, 2005), with four replicates
Imbibition curves Four replicates of 5 g of seeds of each cultivar were distributed on three sheets of germination paper and covered with more three sheets, the placed on a metallic screen attached to a plastic box (11 x 11 x 3.5 cm) containing 40 ml of distilled water inside or solutions containing boric acid, zinc sulfate or Stimulate®
Summary
Seed priming is a technique that comprises controlled seed hydration to achieve a sufficient level to enable the preparatory processes essential for germination, without allowing protrusion of the primary root. Different procedures may be used for carrying out priming, according to the established type of methodology for the supply of water to seeds. Priming can involve different matrices and other conditions that regulate seed moisture content; this can be achieved through the use of various aqueous solutions, solid particulate systems and a spectrum of controlled moisture contents (TAYLOR et al, 1998). According to Farooq et al (2012), application of micronutrients by seed treatment may be considered a better alternative in many cases, compared to other methods. According to these authors, seed priming with zinc (Zn) can increase seedling emergence, establishment and subsequent growth as well as productivity. According to these authors, seed priming with zinc (Zn) can increase seedling emergence, establishment and subsequent growth as well as productivity. Imran et al (2013) found that the priming of corn seeds with nutrients promoted greater plant growth up to 5 weeks after sowing under field conditions
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