Influence of selenium in drought-stressed wheat plants under greenhouse and field conditions | Vpliv selena na pšenico v sušnem stresu v rastlinjaku in na polju

English. Effects of selenium (Na2SeO4) was studied in two wheat genotypes under well-watered and drought conditions in greenhouse (15 µg Se L-1) and field (20-60 60 g ha-1) experiments. Application of Se improved dry matter and grain yield under both well-watered and drought conditions. Se increased leaf concentration of pigments and photosynthesis rate under both well-watered and drought conditions. Our results indicated that Se alleviates drought stress via increased photosynthesis rate, protection of leaf photochemical events, accumulation of organic osmolytes and improvement of water use efficiency. Under well-watered condition, Se-mediated growth improvement was associated with higher photosynthesis rate and water use efficiency, greater root length and diameter, and higher leaf water content.

Slovenian. Raziskovan je bil vpliv selena (Na2SeO4) na rastline dveh genotipov navadne pšenice, v sušnih razmerah oziroma pri dobri oskrbi z vodo, v rastlinjaku (15 µg Se L-1) in na polju (20-60 60 g ha-1). Dodatek Se je povečal sušino rastlin in pridelek zrnja pri obeh načinih oskrbe z vodo. Se je vplival na povečano koncentracijo pigmentov in na povečanje fotosinteze listov pri obeh oskrbah z vodo. Rezultati kažejo, da dodatek Se omili vpliv sušnega stresa s povečanjem fotosinteze, zaščito lista s fotokemičnimi procesi, akumulacijo organskih ozmotikov in povečano učinkovitostjo porabe vode. V razmerah dobre oskrbe z vodo je bila povečana rast, omogočena z dostopnostjo selena, povezana z intenzivnejšo fotosintezo in večjo učinkovitostjo uporabo vode, daljšimi in debelejšimi koreninami in večjo vsebnostjo vode.