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Poster De Conférence Année : 2016

Evaluation of Plasma Component Effects in LTNTP seed treatments

Résumé

The quality of seeds not only includes their capacity of rapid germination and fruitful growth, but also their protection against, at least, major well know diseases that can threaten their development (for example diseases provoked by caries or smut in the case of wheat). Taking into account the fact that, in the coming years, the new regulations will lead to the impossibility to use the up to now frequently used chemicals, seed producers will have to find new physical treatments if they don’t want to face problems when putting their production on the market. They are then facing another problem: physical treatment must cure seed from pathogens, but, at the same time, they must be totally safe for seed germination and growth. Also, the longer term effects on plants and potential gene modifications should be considered. Due to seed characteristics, especially designed to survive in aggressive environments during the latency period, this represents a huge challenge not easy to overcome. Low Temperature Non Thermal Plasmas (LTNTP) appear as a very interesting potential treatment in that domain, especially for very high added value seeds, and can open new routes in the seed processing. Due the complex nature of plasmas produced at atmospheric pressure in air, preliminary experiments must be conducted to allow determination of plasma components (at least RONS, UV and Electric field) main action trends. Experiments, dedicated to that, have been conducted on various seeds and discharge systems (including jet, multijets, volumic plasmas, low pressure plasmas) and will be presented with emphasis on growth regulation and potential toxicity. Special emphasis will be put on the appearance of “hormetic” type [1] response (see Fig. 1) that affects the growth of seedling or roots through the antagonist regulation of auxyns and cytokynes versus treatment time. Fig.1 Growth of wheat versus plasma electric field treatment time measured 10, 14 and 18 days after seeding References [1]D. Graves, Clinical Plasma Medicine 2 38 (2014) and Atelier RPF/ABioPlas, Orléans Nov. 16-17, 2015 (from M. Ristow and K. Zarse, Exp. Gerontology, 45, 410 (2010))
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Dates et versions

hal-01948501 , version 1 (07-12-2018)

Identifiants

  • HAL Id : hal-01948501 , version 1

Citer

Jean-Michel Pouvesle, Sebatien Dozias, Thomas Maho, Alexandra Briolay, Sylvain Milsant, et al.. Evaluation of Plasma Component Effects in LTNTP seed treatments. ICPM6, Sep 2016, Bratislava, Slovakia. ⟨hal-01948501⟩
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