Sodium hypochlorite in the priming of tobacco seeds

Abstract

Due to the non-uninform maturation of tobacco fruits and seeds, the priming technique has been used by the tobacco industry as a way of increasing the uniformity and germinations peed of seeds. Several factors can affect priming, including the time and environment in which the treatment is performed. In order to evaluate the effect of sodium hypochlorite as priming agent at different concentrations and the priming period on the physiological quality of the tobacco seeds, it was used a seed lot of commercial cultivar CSC 439 from the Virginia varietal group, widely used by the producing companies. The seeds were subjected to priming in aerated solution at different priming periods (180, 60, 30, 15, and 5 min) and concentrations of sodium hypochlorite (1%, 0.50%, 0.25%, and 0.10 %). The physiological quality was evaluated by the water contents, germination tests, first count, germination index, initial and final stands, emergence index and electrical conductivity. The priming with sodium hypochlorite did not affect germination, but allowed a higher percentage and speed of emergence when using the 1% concentration for 180, 30 and 15 min.

Response of two pepper species (Capsicum chinense Jacq. and Capsicum frutescens L.) to salt stress at germination stage in Northeast Brazil

“…Adequate establishment of the time for the soaking of seeds in salt solutions is extremely important to obtain success in the initial stand of seedlings, thus improving the establishment of the crop in the field. This has been done in studies for different species, such as Nicotiana tabacum (Caldeira et al, 2014;Lopes et al, 2019), pepper (Garruña-Hernández et al, 2014Andrade and Laurentin, 2015;Ermis et al, 2016;Alcalá-Rico et al, 2019), Dianthus barbatus L. (González-Amaya et al, 2018), and canola (Shirazi et al, 2019).…”

“…The techniques used in seed pre-treatment include physiological priming (Lopes et al, 2019), which consists in controlled hydration of the seeds to a certain level, enabling the occurrence of the initial stages of germination (Lopez del Egido et al, 2018;Ebert and Wu, 2019). Osmopriming is one of the main techniques for seed priming (Garruña-Hernández et al, 2014).…”

Seed priming with salicylic acid potentiates water restriction-induced effects in tomato seed germination and early seedling growth

“…During seed germination, salt and osmotic stresses are responsible for both inhibition or delayed seed germination and seedling establishment (Lopes et al, 2019;Silva et al, 2019). Producing plants that can withstand these stresses is a considerable challenge; therefore the development of scientific strategies for minimizing damages due to low water availability is warranted.…”

Stored diaspores of Astronium urundeuva Fr. (M. Allemão) Engl. (Anacardiaceae) submitted to hydropriming

“…This allows the membrane system to restructure itself, minimizing the excessive release of exudates (Marcos-Filho, 2015). This method can induce mechanisms of both protection and repair in seeds, making them capable of tolerating future stresses (Kubala et al, 2015), and favoring faster germination and the proper establishment of the specimens (Lopes et al, 2019).…”