徐田军, 吕天放, 张勇, 刘宏伟, 刘月娥, 蔡万涛, 张如养, 宋伟, 邢锦丰, 赵久然, 王荣焕. 高温胁迫对玉米杂交种及其亲本自交系光合特性、保护酶活性和产量的影响[J]. 中国生态农业学报 (中英文), 2024, 32(0): 1−11. DOI: 10.12357/cjea.20230721
引用本文: 徐田军, 吕天放, 张勇, 刘宏伟, 刘月娥, 蔡万涛, 张如养, 宋伟, 邢锦丰, 赵久然, 王荣焕. 高温胁迫对玉米杂交种及其亲本自交系光合特性、保护酶活性和产量的影响[J]. 中国生态农业学报 (中英文), 2024, 32(0): 1−11. DOI: 10.12357/cjea.20230721
XU T J, LYU T, ZHANG Y, LIU H W, LIU Y E, CAI W T, ZHANG R Y, SONG W, XING J F, ZHAO J R, WANG R H. Effects of high temperature stress on photosynthetic characteristics, protective enzyme activity and yield of maize hybrids and their parental inbred lines[J]. Chinese Journal of Eco-Agriculture, 2024, 32(0): 1−11. DOI: 10.12357/cjea.20230721
Citation: XU T J, LYU T, ZHANG Y, LIU H W, LIU Y E, CAI W T, ZHANG R Y, SONG W, XING J F, ZHAO J R, WANG R H. Effects of high temperature stress on photosynthetic characteristics, protective enzyme activity and yield of maize hybrids and their parental inbred lines[J]. Chinese Journal of Eco-Agriculture, 2024, 32(0): 1−11. DOI: 10.12357/cjea.20230721

高温胁迫对玉米杂交种及其亲本自交系光合特性、保护酶活性和产量的影响

Effects of high temperature stress on photosynthetic characteristics, protective enzyme activity and yield of maize hybrids and their parental inbred lines

  • 摘要: 研究并明确高温胁迫对玉米杂交种及其亲本自交系叶片光合性能、产量性状等的影响, 以期为耐高温玉米品种选育和推广提供理论依据。以‘京农科728’ ‘MC812’ ‘先玉335’和‘郑单958’及其亲本自交系为试验材料, 于花期前后(大喇叭口期—吐丝后7 d)对其进行高温胁迫(高温胁迫15 d)处理, 研究高温胁迫对不同基因型玉米杂交种及其亲本自交系叶绿素相对含量、光合特性、最大光化学效率(Fv/Fm)、保护酶活性、产量及其产量构成要素的影响。结果表明: 1)与大田对照相比, 花期前后高温胁迫下不同杂交种及其亲本自交系的叶绿素相对含量、净光合速率、气孔导度和Fv/Fm均呈降低趋势, 杂交种以‘京农科728’降幅最小, 亲本自交系以‘京2416’降幅最小。胞间CO2浓度和蒸腾速率则均呈升高趋势, 杂交种以‘京农科728’增幅最小, 亲本自交系以‘京2416’增幅最小。2)花期前后高温胁迫导致玉米杂交种及其亲本自交系的穗位叶磷酸烯醇式丙酮酸羧化酶(PEPCase)、核酮糖-1,5-二磷酸羧化酶(RuBPCase)、过氧化物酶(CAT)和超氧化物歧化酶(SOD)活性呈降低趋势。3)花期前后高温胁迫显著降低了玉米杂交种及其亲本自交系的穗长、穗行数和行粒数, 进而导致产量显著下降, 杂交种‘京农科728’ ‘MC812’ ‘先玉335’和‘郑单958’产量分别降低3.18%、5.00%、50.61%和9.50%; 亲本自交系中, ‘京2416’的穗行数、行粒数和产量降幅最小, 而‘PH6WC’降幅最大。由此可见, 花期前后高温胁迫下‘京农科728’ ‘MC812’及其父本自交‘京2416’具有较高的叶绿素相对含量、光合能力和保护酶活性, 产量受高温影响较小, 具有较好的耐热性。

     

    Abstract: The Huang-Huai-Hai summer maize region is one of the dominant maize producing areas in China. The adverse climate such as high temperature and heat damage occurs frequently in the growing season of maize, which has a great impact on maize production. The effects of high temperature stress on leaf photosynthetic performance and yield traits of maize hybrids and their parent inbred lines were studied in order to provide theoretical basis for breeding and popularization of high temperature tolerant maize varieties. ‘Jingnongke728’, ‘MC812’, ‘Xianyu335’, ‘Zhengdan958’ and their parental inbred lines were used, high temperature treatments from V13 stage to 7 d after silking were conducted, and the effects of high temperature stress on the relative content of chlorophyll, photosynthetic characteristics, Fv/Fm, photosynthetic enzyme activity, yield and yield components were studied. Compared with field control, the relative chlorophyll content, net photosynthetic rate, stomatal conductance and Fv/Fm of different hybrids and their parent inbred lines decreased under high temperature stress before and after flowering. The decrease of hybrid ‘Jingnongke728’ was the smallest, and that of parent inbred line ‘Jing2416’ was the smallest. The intercellular CO2 concentration and transpiration rate showed an increasing trend, with ‘Jingnongke728’ having the smallest increase, and ‘Jing2416’ having the smallest increase. (2) The activities of phosphoenolpyruvate carboxylase (PEPCase), ribulose-1, 5-bisphosphate carboxylase (RuBPCase), peroxidase (CAT) and superoxide dismutase (SOD) in ear leaves of maize hybrids and their parent inbred lines were decreased under high temperature stress before and after flowering. (3) High temperature stress before and after flowering significantly reduced the ear length, rows per ear and grains per row of maize hybrids and their parent inbred lines, which led to a significant decline in yield. The yields of hybrids ‘Jingnongke728’, ‘MC812’, ‘Xianyu335’ and ‘Zhengdan958’ decreased by 3.18%, 5.00%, 50.61% and 9.50% respectively; Among the parent inbred lines, ‘Jing2416’ had the smallest decrease in rows per spike, grains per row and yield, while ‘PH6WC’ had the largest decrease. It can be seen that ‘Jingnongke728’, ‘MC812’ and their male parent ‘Jing2416’ have higher chlorophyll relative content, photosynthetic capacity and protective enzyme activity under high temperature stress before and after flowering, and their yield is less affected by high temperature, so they have better heat tolerance.

     

/

返回文章
返回