Effect of Se application on photosynthesis, osmolytes and water relations in two durum wheat (Triticum durum L.) genotypes under drought stress | Učinek uporabe Se na fotosintezo, vsebnost osmotikov in vodni režim pri dveh genotipih trde pšenice (Triticum durum L.) v razmerah sušnega stresa

Inglés. Effect of Se (as Na2SeO4 at final concentration of 10 µg l-1) was studied in two durum wheat (Triticum durum L.) genotypes in perlite under drought conditions. Se treatment increased slightly biomass of both genotypes under drought but not under control conditions. Photosynthetic rate was depressed by drought while increased by Se treatments in both genotypes up to 2.3 fold. However, transpirational water loss was also enhanced in Se-treated plants under both well-watered and drought conditions. Se application resulted in higher concentrations of soluble proteins and free α-amino acids under drought conditions, but not proline. Our results indicated that Se application improves some physiological parameters such as photosynthesis, accumulation of osmolyes and water use efficiency but did not change significantly plants biomass or water relation parameters.

Esloveno. Preučevani so bili učinki Se, dodanega kot Na2SeO4 v koncentraciji 10 µg l-1 na dveh genotipih trde pšenice (Triticum durum L.) gojene v perlitu v razmerah sušnega stresa. Tretiranje s Se je neznatno povečalo biomaso obeh genotipov v razmerah sušnega stresa, a ne pri kontroli. Fotosinteza je upadla s sušo, a se je po tretiranju s Se pri obeh genotipih povečala za 2.3 krat. Transpiracijska izguba vode je bila pospešena pri rastlinah tretiranih s Se v razmerah sušnega stresa kot pri dobro zalitih rastlinah. Uporaba Se se je odrazila v večji koncentraciji topnih beljakovin in prostih α-amino kislin v razmerah suše, vendar ne v koncentraciji prolina. Naši rezultati kažejo, da uporaba Se izboljša nekatere fiziološke parameter kot so fotosinteza, akumulacija osmotikov in učinkovitost izrabe vode, vendar ne spremeni značilno biomase rastlin in parametrov vodnega režima rastline.