Naslov
Evaluation of drought tolerance among common bean landraces

Autori
Javornik, Tomislav ; Lazarević, Boris ; Carović- Stanko, Klaudija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
58th Croatian & 18th International Symposium on Agriculture

Mjesto i datum
Dubrovnik, Hrvatska, 11.02.2023. - 17.02.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
common bean, drought, stomatal conductance

Sažetak
Drought is becoming one of the major constraints in bean production and the selection of drought- tolerant bean genotypes is one of the most important drought adaptation strategies. Drought- tolerant plants develop various physiological and biochemical adaptations under water deficit conditions. These include changes in water use efficiency, pigment content, osmotic adjustment, and photosynthetic activity. The aim of this study was to evaluate drought tolerance among different bean landraces (‘Biser’, ‘Zelenčec’, ‘Trešnjevac’, and ‘Puter’). Plants were grown in river sand and were irrigated with 50 ml of a 1/4-strength Hoagland nutrient solution at the beginning of the experiment. The water content of the control plants was kept at the maximum water capacity of the sand, while in the drought treatment there was no additional irrigation throughout the experiment. During two weeks, five measurements of the stomatal conductance (gsw), boundary layer conductance (gbw), total conductance to water vapor (gtw), transpiration (E), effective quantum yield of PSII photochemistry (ϕPSII), and electron transport rate (ETR) were measured using the LI- 600 poro/fluorometer. Since the onset of drought, ‘Biser’ showed significantly higher gsw, gtw, E and ETR compared to other landraces. These results suggest that ‘Biser’ can maintain normal physiological functions and survive longer under water deficit conditions.

Izvorni jezik
Engleski

POVEZANOST RADA