Exogenous calcium enhances the physiological status and photosynthetic capacity of rose under drought stress

被引:7
作者
Zhao, Xiaojuan [1 ]
Lin, Shang [1 ]
Yu, Shuang [1 ]
Zhang, Yichang [1 ]
Su, Lin [1 ]
Geng, Lifang [1 ]
Cheng, Chenxia [2 ]
Jiang, Xinqiang [1 ]
机构
[1] Qingdao Agr Univ, Coll Landscape Architecture & Forestry, Qingdao 266000, Shandong, Peoples R China
[2] Qingdao Agr Univ, Coll Hort, Qingdao 266000, Shandong, Peoples R China
关键词
Rosa hybrida L; Exogenous calcium; Drought stress; Physiological index; Photosynthetic capacity; PHOTOSYSTEM-II; ELECTRON-TRANSPORT; WATER-STRESS; RESPONSES; FLUORESCENCE; CULTIVARS; SYSTEM; RICE; LEAF; L;
D O I
10.1016/j.hpj.2023.01.010
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Drought (water shortage) can substantially limit the yield and economic value of rose plants (Rosa spp.). Here, we characterized the effect of exogenous calcium (Ca 2 + ) 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 signi ficantly reduced by drought; drought also had a major effect on the enzymatic antioxidant system and increased concentrations of reactive oxygen species. Application of exogenous Ca 2 + increased the net photosynthetic rate and stomatal conductance of leaves, enhanced water-use ef ficiency, and increased the length and width of stomata following exposure to drought. Organ-speci fic physiological responses were observed under different concentrations of Ca 2 + . Application of 5 mmol center dot L - 1 Ca 2 + promoted photosynthesis and antioxidant activity in the leaves, and application of 10 mmol center dot L - 1 Ca 2 + promoted antioxidant activity in the roots. Application of exogenous Ca 2 + 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 Ca 2 + enhances the drought resistance of roses by promoting physiological adaptation and that it could be used to aid the cultivation of rose plants.
引用
收藏
页码:853 / 865
页数:13
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