Water deficit effect on physiological responses of Lotus corniculatus plants of different origin
2016
Kostopoulou, P | Karatassiou, M | Lazaridou, A | Lazaridou, M
Lotus corniculatus seedlings of two different origins were used to evaluate the effect of water deficit on physiological parameters. Plants from two natural populations of Northern Greece (Kilkis and Taxiarchis) were selected and transplanted to pots. After a period of plant establishment, two water regimes were used: (a) irrigation up to field capacity and (b) limited irrigation in order to maintain water deficit conditions in the soil. The measurements were taken during the growing season at four different phenological stages. Assimilation rate, transpiration rate, stomatal conductance, chlorophyll fluorescence and water potential were measured, while water use efficiency (WUE) was calculated. The results showed that plant origin significantly affected the assimilation rate, stomatal conductance and transpiration rate, with plants of Taxiarchis origin showing higher values. On the other hand, the water treatment used in the present study did not induce any significant changes of the measured physiological parameters, suggesting some degree of drought tolerance of this species
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