大气CO2浓度和气温升高对玉米灌浆期碳氮代谢的影响
S513; 为探讨C4作物玉米对CO2浓度升高、温度升高及其交互作用的响应,本研究以玉米品种'先玉335'为材料,利用人工控制气室设置CK(CO2浓度为400μmol?mol?1,环境温度)、EC(CO2浓度为600μmol?mol?1,环境温度)、ET(CO2浓度为400μmol?mol?1,气温为环境温度+2℃)、ECT(CO2浓度为600μmol?mol?1,气温为环境温度+2℃)4个处理,测定玉米灌浆期叶片光合生理、糖代谢、氮代谢相关指标,并在成熟后测定玉米生物量.结果表明:1)CO2浓度升高条件下,玉米叶片叶绿素含量、蔗糖含量、净光合速率及蔗糖合成酶、丙酮酸激酶和...
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| Published in | 中国生态农业学报（中英文） Vol. 31; no. 2; pp. 325 - 335 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
山西农业大学农学院 太谷 030801
01.02.2023
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| Subjects | |
| Online Access | Get full text |
| ISSN | 2096-6237 |
| DOI | 10.12357/cjea.20220395 |
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| Abstract | S513; 为探讨C4作物玉米对CO2浓度升高、温度升高及其交互作用的响应,本研究以玉米品种'先玉335'为材料,利用人工控制气室设置CK(CO2浓度为400μmol?mol?1,环境温度)、EC(CO2浓度为600μmol?mol?1,环境温度)、ET(CO2浓度为400μmol?mol?1,气温为环境温度+2℃)、ECT(CO2浓度为600μmol?mol?1,气温为环境温度+2℃)4个处理,测定玉米灌浆期叶片光合生理、糖代谢、氮代谢相关指标,并在成熟后测定玉米生物量.结果表明:1)CO2浓度升高条件下,玉米叶片叶绿素含量、蔗糖含量、净光合速率及蔗糖合成酶、丙酮酸激酶和α-酮戊二酸脱氢酶活性显著升高(P<0.05),但谷氨酸合成酶活性显著降低(P<0.05),地上部生物量和穗重显著升高35.8％ 和170.2％(P<0.05).2)气温升高条件下,叶片净光合速率、蔗糖合成酶和丙酮酸激酶活性显著升高(P<0.05),但α-酮戊二酸脱氢酶和谷氨酸合成酶活性显著降低(P<0.05),地上部生物量、叶重、茎重和穗重显著降低37.0％、28.7％、32.3％ 和62.2％(P<0.05).3)CO2浓度和气温均升高条件下,叶片净光合速率和丙酮酸激酶活性显著升高(P<0.05),但叶绿素含量、α-酮戊二酸脱氢酶和谷氨酸合成酶活性显著降低(P<0.05),叶重显著降低23.4％(P<0.05).总之,CO2浓度升高可通过促进玉米叶片光合速率,增加糖代谢相关酶活性和光合代谢产物等缓解温度升高对玉米生物量的负效应;CO2浓度升高、气温升高以及二者互作下玉米氮代谢受到抑制,玉米叶片受到氮素胁迫,或对玉米品质产生不利影响. |
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| AbstractList | S513; 为探讨C4作物玉米对CO2浓度升高、温度升高及其交互作用的响应,本研究以玉米品种'先玉335'为材料,利用人工控制气室设置CK(CO2浓度为400μmol?mol?1,环境温度)、EC(CO2浓度为600μmol?mol?1,环境温度)、ET(CO2浓度为400μmol?mol?1,气温为环境温度+2℃)、ECT(CO2浓度为600μmol?mol?1,气温为环境温度+2℃)4个处理,测定玉米灌浆期叶片光合生理、糖代谢、氮代谢相关指标,并在成熟后测定玉米生物量.结果表明:1)CO2浓度升高条件下,玉米叶片叶绿素含量、蔗糖含量、净光合速率及蔗糖合成酶、丙酮酸激酶和α-酮戊二酸脱氢酶活性显著升高(P<0.05),但谷氨酸合成酶活性显著降低(P<0.05),地上部生物量和穗重显著升高35.8％ 和170.2％(P<0.05).2)气温升高条件下,叶片净光合速率、蔗糖合成酶和丙酮酸激酶活性显著升高(P<0.05),但α-酮戊二酸脱氢酶和谷氨酸合成酶活性显著降低(P<0.05),地上部生物量、叶重、茎重和穗重显著降低37.0％、28.7％、32.3％ 和62.2％(P<0.05).3)CO2浓度和气温均升高条件下,叶片净光合速率和丙酮酸激酶活性显著升高(P<0.05),但叶绿素含量、α-酮戊二酸脱氢酶和谷氨酸合成酶活性显著降低(P<0.05),叶重显著降低23.4％(P<0.05).总之,CO2浓度升高可通过促进玉米叶片光合速率,增加糖代谢相关酶活性和光合代谢产物等缓解温度升高对玉米生物量的负效应;CO2浓度升高、气温升高以及二者互作下玉米氮代谢受到抑制,玉米叶片受到氮素胁迫,或对玉米品质产生不利影响. |
| Author | 王娇 李萍 杨净 张东升 宗毓铮 郝兴宇 史鑫蕊 |
| AuthorAffiliation | 山西农业大学农学院 太谷 030801 |
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| Author_FL | LI Ping HAO Xingyu ZONG Yuzheng SHI Xinrui WANG Jiao ZHANG Dongsheng YANG Jing |
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| Snippet | S513; 为探讨C4作物玉米对CO2浓度升高、温度升高及其交互作用的响应,本研究以玉米品种'先玉335'为材料,利用人工控制气室设置CK(CO2浓度为400μmol?mol?1,环境温度)、EC(CO2浓... |
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| Title | 大气CO2浓度和气温升高对玉米灌浆期碳氮代谢的影响 |
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