Feng Yu-Xi, Tian Peng, Li Cheng-Zhi, Zhang Qing, Trapp Stefan, Yu Xiao-Zhang
College of Environmental Science & Engineering, Guilin University of Technology, Guilin, China.
Department of Environmental and Resource Engineering, Technical University of Denmark, Kongens Lyngby, Denmark.
Front Plant Sci. 2023 Apr 5;14:1161334. doi: 10.3389/fpls.2023.1161334. eCollection 2023.
Plant kingdoms are facing increasingly harsh environmental challenges marked by the coexposure of salinity and pollution in the pedosphere and elevated CO and temperature in the atmosphere due to the rapid acceleration of industrialization and global climate change. In this study, we deployed a hydroponics-based experiment to explore the individual and mutual effects of different temperatures (low temperature, T1: 23°C; high temperature, T2: 27°C) and CO concentrations (ambient CO: 360 ppm; medium CO: 450 ppm; high CO: 700 ppm) on the uptake and translocation of sodium chloride (NaCl, 0.0, 0.2, 0.6, and 1.1 g Na/L) and cadmium nitrate (Cd(NO)·4HO, 0.0, 0.2, 1.8, and 5.4 mg Cd/L) by rice seedlings. The results indicated that Cd and Na exposure significantly (< 0.05) inhibited plant growth, but T2 and medium/high CO alleviated the effects of Cd and Na on plant growth. Neither significant synergistic nor antagonistic effects of Cd and Na were observed, particularly not at T1 or high CO. At increasing temperatures, relative growth rates increased despite higher concentrations of Cd and Na in both rice roots and shoots. Similarly, higher CO stimulated the growth rate but resulted in significantly lower concentrations of Na, while the Cd concentration was highest at medium CO. Coexposure experiments suggested that the concentration of Cd in roots slightly declined with additional Na and more at T2. Overall, our preliminary study suggested that global climate change may alter the distribution of mineral and toxic elements in rice plants as well as the tolerance of the plants.
由于工业化的迅速加速和全球气候变化，植物王国正面临着日益严峻的环境挑战，其特征是土壤圈中盐分和污染的共同暴露以及大气中一氧化碳和温度的升高。在本研究中，我们开展了一项基于水培的实验，以探究不同温度（低温，T1：23°C；高温，T2：27°C）和一氧化碳浓度（环境一氧化碳：360 ppm；中等一氧化碳：450 ppm；高一氧化碳：700 ppm）对水稻幼苗吸收和转运氯化钠（NaCl，0.0、0.2、0.6和1.1 g Na/L）和硝酸镉（Cd(NO₃)₂·4H₂O，0.0、0.2、1.8和5.4 mg Cd/L）的单独和相互影响。结果表明，镉和钠的暴露显著（<0.05）抑制了植物生长，但T2以及中等/高浓度一氧化碳缓解了镉和钠对植物生长的影响。未观察到镉和钠有显著的协同或拮抗作用，尤其是在T1或高浓度一氧化碳条件下。在温度升高时，尽管水稻根和地上部分镉和钠的浓度较高，但相对生长速率仍有所增加。同样，较高浓度的一氧化碳刺激了生长速率，但导致钠的浓度显著降低，而镉的浓度在中等一氧化碳浓度时最高。共同暴露实验表明，随着钠的添加，根中镉的浓度略有下降，在T2时下降更多。总体而言，我们的初步研究表明，全球气候变化可能会改变水稻植株中矿物质和有毒元素的分布以及植株的耐受性。
