Sunflower root phenotyping for drought tolerance

Suncokret (Helianthus annuus L.), u poređenju sa drugim usevima se smatra bolje adaptiranim prema sušnim uslovima. Međutim, različito ispoljavanje suše može prouzrokovati štete merljive u prinosu semena i sadržaju ulja u semenu. U poljskim uslovima stres izazvan sušom se ispoljava u vidu uvelosti počev od donjih spratova lišća koja napreduje sa trajanjem sušnih uslova. Razlike u stepenu uvelosti između biljaka suncokreta i genotipova su, iako lako uočljive, nedovoljne za pouzdan zaključak o tolerantnosti prema suši. Za potrebe kvantifikacije tolerantnosti suncokreta prema suši i uticaja suše na arhitekturu korena razvijene su različite metode od kojih jedna podrazumeva gajenje biljaka u rizotronima tokom vremenskog perioda ograničenog brzinom rasta korena. Cilj ovog istraživanja je bilo proučavanje korena suncokreta primenom rizotrona u uslovima suše.Sunflower (Helianthus annuus L.), compared to other crops is considered to be better adapted to drought conditions. However, various drought scenarios can inflict damage quantified in terms of lower seed yield and oil content. In field conditions drought stress in visible in wilting starting with leaves of lower strata and progressing with persistence of stress conditions. Differences in level of wilting symptoms between sunflower plants and genotypes can be observed, although firm conclusion about drought tolerance is not easy to make. To quantify drought tolerance and impact of drought on root architecture various approaches in root phenotyping have been developed. One of methods includes growing plants in rhizotrons for period of time limited by root growth speed