首页|Exogenous calcium enhances the physiological status and photosynthetic capacity of rose under drought stress
Exogenous calcium enhances the physiological status and photosynthetic capacity of rose under drought stress
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Drought(water shortage)can substantially limit the yield and economic value of rose plants(Rosa spp.).Here,we characterized the effect of exogenous calcium(Ca2+)on the antioxidant system and photosynthesis-related properties of rose under polyethylene glycol 6000(PEG6000)-induced drought stress.Chlorophyll levels,as well as leaf and root biomass,were significantly reduced by drought;drought also had a major effect on the enzymatic antioxidant system and increased concentrations of reactive oxygen species.Application of exogenous Ca2+increased the net photosynthetic rate and stomatal conductance of leaves,enhanced water-use efficiency,and increased the length and width of stomata following exposure to drought.Organ-specific physiological responses were observed under different concentrations of Ca2+.Application of 5 mmol·L-1 Ca2+promoted photosynthesis and antioxidant activity in the leaves,and application of 10 mmol·L-1 Ca2+promoted antioxidant activity in the roots.Application of exogenous Ca2+greatly enhanced the phenotype and photosynthetic capacity of potted rose plants following exposure to drought stress.Overall,our findings indicate that the application of exogenous Ca2+enhances the drought resistance of roses by promoting physiological adaptation and that it could be used to aid the cultivation of rose plants.
Rosa hybrida L.Exogenous calciumDrought stressPhysiological indexPhotosynthetic capacity
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