Publications by authors named "Perla Carolina Kozub"

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Response to water deficit of semi-desert wild potato Solanum kurtzianum genotypes collected from different altitudes.

Plant Sci 2021 Jul 15;308:110911. Epub 2021 Apr 15.

Instituto de Biología Agrícola de Mendoza, CONICET-Universidad Nacional de Cuyo, Facultad de Ciencias Agrarias, Alte. Brown 500, M5505, Chacras de Coria, Mendoza, Argentina; Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Alte. Brown 500, M5505, Chacras de Coria, Mendoza, Argentina.

Drought-sensitive crops are threatened as a consequence of limited available water due to climate change. The cultivated potato (Solanum tuberosum) is susceptible to drought and within its wild relative species, Solanum kurtzianum is the Argentinian wild potato species best adapted to arid conditions. However, its physiological responses to water deficit (WD) are still missing. Within the distribution of S. kurtzianum, genotypes could be adapted to differential precipitation regimes. The aim of this work was to evaluate responses of three S. kurtzianum genotypes collected at 1100 (G1), 1900 (G2) and 2100 m a.s.l. (G3) to moderate and severe WD. Treatments were imposed since flowering and lasted 36 days. Yield components, morpho-physiological and biochemical responses; and phenotypic plasticity were evaluated. The three genotypes presented mechanisms to tolerate both WD treatments. G1 presented the lowest yield reduction under moderate WD, mainly through a rapid stomatal closure and a modest vegetative growth. The differences among genotypes suggest that local adaptation is taking place within its natural habitat. Also, G2 presented environmentally induced shifts in plasticity for stomatal length and carotenoids, suggesting that phenotypic plasticity has a role in acclimation of plants to WD until selection works.
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July 2021