农业环境科学学报2016，Vol.35Issue(9)：1642-1652,11.DOI:10.11654/jaes.2015-1449
臭氧浓度增加对不同敏感型水稻元素吸收与分配的影响
Impact of ozone stress on element absorption and distribution of rice genotypes with different ozone sensitivi-ties
摘要
Abstract
In this study, 23 rice cultivars or lines were grown in glasshouse-type fumigation chambers at two ozone levels:low ozone concen-tration as control(C-O3, 10 nL·L-1)and high ozone concentration(E-O3, 100 nL·L-1)until rice maturity. Based on the decreases in the above-ground biomass under high ozone concentration, these rice genotypes were clustered into three groups by the MinSSw(dynamic clus-tering method-minimum sum of squares within groups)method, namely A, B and C in order of ozone sensitivity from low to high. The effect of ozone stress on element uptake and distribution in rice vegetative organs were then determined. At grain maturity, ozone stress decreased the above-ground biomass of rice by 19%, 39% and 52% for A, B and C group, respectively. Significant treatment effects were observed in groups B and C. Compared to the control, ozone stress significantly increased N, P, K, Mg, Mn, Fe, Cu and Zn concentrations of rice straw in a range of 5% to 42%, but had no effect on Ca concentration. In the contrast, the uptake of N, P, K, Ca, Mg, Fe, Cu and Zn in rice straw were significantly 11% to 34% lower under high ozone concentration. In most cases, the ozone-induced changes in element concentrations and uptake were greater in stems than in leaves. In line with this, ozone stress increased element allocation to leaves but decreased that in stems, resulting in significant increases in the leaf to stem ratios(32% to 92%). There were barely interactions between ozone and rice sensi-tivity types for element concentrations or allocation in leaves and stems, but significant interactions were found for element uptake. The sen-sitive rice culltivars showed greater ozone-induced inhibition of element uptake. These results indicate that 100 nL·L-1 ozone have profound impacts on the element concentration, uptake and allocation of rice organs, and that the responses of plant element uptake to ozone stress are significantly affected by rice sensitivity to ozone.关键词
水稻/臭氧/元素浓度/元素吸收/元素分配Key words
rice/ozone stress/element concentration/element uptake/element allocation分类
资源环境引用本文复制引用
邵在胜,沈士博,贾一磊,穆海蓉,王云霞,杨连新,王余龙..臭氧浓度增加对不同敏感型水稻元素吸收与分配的影响[J].农业环境科学学报,2016,35(9):1642-1652,11.基金项目
国家自然科学基金面上项目（31471437，31371563）；土壤与农业可持续发展国家重点实验室开放基金（0812201233）；2012年中德合作科研项目（PPP）；江苏高校优势学科建设工程项目 （）
