Elevated ozone inhibits isoprene emission of a diploid and a triploid genotype of Populus tomentosa by different mechanisms
文献类型：期刊论文
| 作者 | Li, Shuangjiang; Feng, Zhaozhong; Yuan, Xiangyang ; Wang, Miaomiao; Agathokleous, Evgenios
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| 刊名 | JOURNAL OF EXPERIMENTAL BOTANY
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| 出版日期 | 2022-08 |
| 期号 | 0页码:1-14 |
| ISSN号 | 0022-0957 |
| 关键词 | VOLATILE ORGANIC-COMPOUNDS METHYL VINYL KETONE BIOENERGY CROPS APOPLASTIC ASCORBATE GENETIC-CONTROL WINTER-WHEAT POPLAR ENERGY CO2 LEAVES |
| 英文摘要 | Ozone (O-3) pollution affects plant growth and isoprene (ISO) emission. However, the response mechanism of isoprene emission rate (ISOrate) to elevated O-3 (EO3) remains poorly understood. ISOrate was investigated in two genotypes (diploid and triploid) of Chinese white poplar (Populus tomentosa Carr.) exposed to EO3 in an open top chamber system. The triploid genotype had higher photosynthetic rate (A) and stomatal conductance (g(s)) than the diploid one. EO3 significantly decreased A, g(s), and ISOrate of middle and lower leaves in both genotypes. In the diploid genotype, the reduction of ISOrate was caused by a systematic decrease related to ISO synthesis capacity, as indicated by decreased contents of the isoprene precursor dimethylallyl diphosphate and decreased isoprene synthase protein and activity. On the other hand, the negative effect of O-3 on ISOrate of the triploid genotype did not result from inhibited ISO synthesis capacity, but from increased ISO oxidative loss within the leaf. Our findings will be useful for breeding poplar genotypes with high yield and lower ISOrate, depending on local atmospheric volatile organic compound/NOx ratio, to cope with both the rising O-3 concentrations and increasing biomass demand. They can also inform the incorporation of O-3 effects into process-based models of isoprene emission. Diploid and triploid poplar have the same leaf isoprene emission rate, but the triploid is a stronger isoprene emitter at whole-plant level, resulting from greater photosynthesis and leaf biomass. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47243]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 通讯作者 | Feng, Zhaozhong |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol, Sch Appl Meteorol, 219 Ningliu Rd, Nanjing 210044, Peoples R China 2.Beijing Forestry Univ, Key Lab Silviculture & Conservat, Minist Educ, Beijing 100083, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Shuangqing Rd 18, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shuangjiang,Feng, Zhaozhong,Yuan, Xiangyang,et al. Elevated ozone inhibits isoprene emission of a diploid and a triploid genotype of Populus tomentosa by different mechanisms[J]. JOURNAL OF EXPERIMENTAL BOTANY,2022(0):1-14. |
| APA | Li, Shuangjiang,Feng, Zhaozhong,Yuan, Xiangyang,Wang, Miaomiao,&Agathokleous, Evgenios.(2022).Elevated ozone inhibits isoprene emission of a diploid and a triploid genotype of Populus tomentosa by different mechanisms.JOURNAL OF EXPERIMENTAL BOTANY(0),1-14. |
| MLA | Li, Shuangjiang,et al."Elevated ozone inhibits isoprene emission of a diploid and a triploid genotype of Populus tomentosa by different mechanisms".JOURNAL OF EXPERIMENTAL BOTANY .0(2022):1-14. |
入库方式： OAI收割
来源：生态环境研究中心
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