|
| 论文编号: |
|
| 论文题目: |
Effects of elevated O3 exposure on seed yield, N concentration and photosynthesis of nine soybean cultivars (Glycine max (L.) Merr.) in Northeast China |
| 英文论文题目: |
Effects of elevated O3 exposure on seed yield, N concentration and photosynthesis of nine soybean cultivars (Glycine max (L.) Merr.) in Northeast China |
| 第一作者: |
张巍巍 |
| 英文第一作者: |
Zhang, W. W. |
| 联系作者: |
刘晓冰 |
| 英文联系作者: |
Liu, X. B. |
| 外单位作者单位: |
|
| 英文外单位作者单位: |
|
| 发表年度: |
2014 |
| 卷: |
226 |
| 期: |
|
| 页码: |
172-181 |
| 摘要: |
Nine soybean cultivars widely cultivated in Northeast China were investigated in present study to assess their O-3 sensitivities on the basis of the response of photosynthesis and seed yield to ambient and future ozone (O-3) concentrations, and determine whether the effects of O-3 vary with the developmental stages (flowering and seed filling stages). Relative to charcoal-filtered air (CF), elevated O-3 concentration (E-O-3, ambient air + 40 ppb) significantly reduced soybean yields by 40%, with a range of 32-46% among cultivars. E-O-3 also induced significant decreases in pigment contents, net photosynthetic rate and chlorophyll a fluorescence at both flowering and seed filling stages in most cultivars. Except net photosynthetic rate and stomatal conductance (g(s)) at seed filling stage, all variables showed no significant interaction between O-3 and cultivar, suggesting that all tested cultivars had similar sensitivities to O-3. The responses of seed N content to E-O-3 differed among cultivars. Ambient O-3 concentration (mean of daily concentration of 19 ppb) did not induce any change relative to CF. Significant positive relationship between endogenous gs in CF and yield loss among cultivars was found only at seed filling stage. Positive correlation between effects of E-O-3 on leaf N content and effects on light saturated photosynthetic rate (A(sat)) indicated that gs and leaf N content at seed filling stage contributes to yield loss and decreased photosynthesis by E-O-3, respectively. It can be inferred that E-O-3 had a larger negative effects on seed filling stage than flowering stage of soybean. |
| 英文摘要: |
Nine soybean cultivars widely cultivated in Northeast China were investigated in present study to assess their O-3 sensitivities on the basis of the response of photosynthesis and seed yield to ambient and future ozone (O-3) concentrations, and determine whether the effects of O-3 vary with the developmental stages (flowering and seed filling stages). Relative to charcoal-filtered air (CF), elevated O-3 concentration (E-O-3, ambient air + 40 ppb) significantly reduced soybean yields by 40%, with a range of 32-46% among cultivars. E-O-3 also induced significant decreases in pigment contents, net photosynthetic rate and chlorophyll a fluorescence at both flowering and seed filling stages in most cultivars. Except net photosynthetic rate and stomatal conductance (g(s)) at seed filling stage, all variables showed no significant interaction between O-3 and cultivar, suggesting that all tested cultivars had similar sensitivities to O-3. The responses of seed N content to E-O-3 differed among cultivars. Ambient O-3 concentration (mean of daily concentration of 19 ppb) did not induce any change relative to CF. Significant positive relationship between endogenous gs in CF and yield loss among cultivars was found only at seed filling stage. Positive correlation between effects of E-O-3 on leaf N content and effects on light saturated photosynthetic rate (A(sat)) indicated that gs and leaf N content at seed filling stage contributes to yield loss and decreased photosynthesis by E-O-3, respectively. It can be inferred that E-O-3 had a larger negative effects on seed filling stage than flowering stage of soybean. |
| 刊物名称: |
Plant Science |
| 英文刊物名称: |
Plant Science |
| 论文全文: |
|
| 英文论文全文: |
|
| 全文链接: |
|
| 其它备注: |
|
| 英文其它备注: |
|
| 学科: |
|
| 英文学科: |
|
| 影响因子: |
|
| 第一作者所在部门: |
|
| 英文第一作者所在部门: |
|
| 论文出处: |
|
| 英文论文出处: |
|
| 论文类别: |
|
| 英文论文类别: |
|
| 参与作者: |
|
| 英文参与作者: |
Wang, G. G.; Liu, X. B.; Feng, Z. Z. |
|
 |
