The effect of selenium on yield and primary terminal electron transport system activity in two cultivars of bean plants Phaseolus vulgaris | Vpliv selena na pridelek in dihalni potencial pri fižolu Phaseolus vulgaris

English. The effect of soaking the seeds in solution of selenium (Se) and foliarly spraying with Se on Phaseolus vulgaris cv. Stanko and Topolovecwere studied. The flows of electrons in the photosynthetic apparatus and in the respiratory chain were measured in control plants and in plants developed from selenium treated seeds and in once and twice foliarly treated plants. Yield of control and treated plants was measured at the end of experiment. The respiratory potential of Phaseolus vulgaris, measured by electron transport system (ETS) activity in cv. Stanko, significantly increased in selenium treated plants. The potential and effective photochemical efficiency of photosystem II were similar comparing treated and untreated plants. The addition of selenium induced yield in twice Se foliarly treated plants in both cultivars growing in greenhouse.

Slovenian. Ugotavljali smo vpliv dodanega selena na fiziološke lastnosti in pridelek  pri dveh kultivarjih fižola Phaseolus vulgaris cv. Stanko in Topolovec. Semena smo namakali v raztopini selenata v prvem poskusu in v drugem smo rastline dvakrat listno škropili z raztopino selenata. Merili smo fotokemično učinkovitost fotosistema II in respiratorni potencial. Respiratorni potencial, merjen s pomočjo aktivnosti terminalnega elektronskega transportnega sistema, je bil višji pri mladih rastlinah. Respiratorni potencial je bil pri cv. Stanko višji pri rastlinah, obravnavanih s selenom. Fotokemična učinkovitost je bila podobna pri kontrolnih rastlinah in rastlinah, obravnavanih s selenom. Dodatek selena je povečal pridelek pri rastlinah, ki so bile dvakrat listno obravnavane s selenom pri obeh kultivarjih, gojenih v rastlinjaku.