OSMOTIC CONDITIONING OF POTATO (<em>Solanum tuberosum</em> L.) SEED WHITH SALINE SOLUTIONS

Mora-Aguilar, Rafael; Rodríguez-Pérez, Juan Enrique; Peña-Lomelí, Aureliano; Campos-Ángeles, D.A.

doi:10.5154/r.rchsh.2001.10.065

ISSN e: 2007-4018 / ISSN print: 2007-4018

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Vol. 10, issue 1 January - June 2004

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OSMOTIC CONDITIONING OF POTATO (Solanum tuberosum L.) SEED WHITH SALINE SOLUTIONS

ACONDICIONAMIENTO OSMÓTICO DE SEMILLA DE PAPA (Solanum tuberosum L.) CON SOLUCIONES SALINAS

Rafael Mora-Aguilar; Juan Enrique Rodríguez-Pérez; Aureliano Peña-Lomelí; D.A. Campos-Ángeles

Keywords: osmotic potential, propagation, seed, dormancy, germination, vigor, storage.

10.5154/r.rchsh.2001.10.065

Received: 2001-10-09
Accepted: 2003-11-06
Available online: 2016-07-01
Pages:15-21

Abstract Highlights

Potato is usually propagated asexually, but the use of true seed is also feasible for this purpose, despite its low physiological quality and dormancy when seed has been recently harvested. Given that osmoconditioning improves germination and makes seed emergence uniform, we evaluated the effect of sodium (Na2HPO4) and potassium (KH2PO4) saline solutions, osmotic potentials (0, -5, -10, -15, -20, -25 atm), conditioning period (12, 24, 36, 48, 60 h), and the persistence of conditioning effect in potato cultivar Tollocan seed that was harvested 90 days early. A standard germination seed test was conducted one week and two years after seed conditioning; treatments were established under a completely random design arranged in split-split-plots with four replications using experimental units of 50 seeds. Recently conditioned seed had better performance than stored seed; viability and germination of seed conditioned in Na2HPO4 or KH2PO4 solutions improved (2 %) relative to the control. Treating in solutions with osmotic potentials of -10 and -5 atm had 69 and 61 % of viability and germination, respectively; similar results were shown by conditioning for 60 h. The highest viability (70 to 77 %) was achieved by treating in solutions of Na2HPO4 at -5 to -10 atm for 24 or 36 h and KH2PO4 from -5 to -10 atm for 12 h when compared to the control (65 %). Germination also improved in solutions of Na2HPO4 (61 %) and KH2PO4 (58 %) when compared to the control (56 %), although treatment with only water and 60 h of imbibition promoted germination more efficiently (67 %).

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