Improving Dormancy and Germination of Piquín Chili Pepper (Capsicum annuum var. glabriusculum) by Priming Techniques

Maria Fernanda Quintero Castellanos; Oscar Guillen Castillo; Pablo Delgado Sánchez; José Marín Sánchez; Ana Isabel Guzmán Carrasco; José Miguel Guzmán

doi:10.20944/preprints201802.0160.v2

Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 24 February 2018 / Approved: 26 February 2018 / Online: 26 February 2018 (10:44:11 CET)
Version 2 : Received: 27 February 2018 / Approved: 27 February 2018 / Online: 27 February 2018 (16:30:10 CET)
Version 3 : Received: 25 March 2018 / Approved: 26 March 2018 / Online: 26 March 2018 (08:51:45 CEST)

The effects of different priming techniques were evaluated to improve the dormancy and germination of wild seeds of “Piquín” chili pepper. Three experiments were designed for pre-sowing treatment of seeds: a) chemical seeds digestion; b) halopriming (with K⁺ or NH₄⁺ of NO₃^-, SO₄^2- or Cl^-) at different priming times (24, 48 or 72 h) and osmotic potential (-5, -10 or -15 atm) and c) previously selected halopriming (KNO₃ and NH₄NO₃) + Gibberellic acid (GA₃, at 100 or 200 ppm) were tested. Digestion treatments did show a negative effect on seed germination. Recommended values of osmotic potential (Ψ_s), to improve Piquín chili seed germination, must be between -10 and -15 atm (-1.0 and -1.5 MPa) and the priming time must be between 48 and 72 hours. Priming techniques can considerably reduce Capsaicinoids content on seeds, improve dormancy, seed germination performance, and increase the rate and uniformity of seedling establishment. KNO₃ and secondly GA₃ treatments may improve rapid and uniform germination and seedling emergence. The results provide basic information to develop guidelines for commercial establishment of Piquín pepper crops.

http://hdl.handle.net/10835/5674: Dataset Agronmy Dpt. UAL Piquin Chili pepeer

wild chili pepper; domestication; seed germination; capsaicinoids content; halopriming; gibberellic acid

BIOLOGY, Agricultural Sciences & Agronomy

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Improving Dormancy and Germination of Piquín Chili Pepper (Capsicum annuum var. glabriusculum) by Priming Techniques

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