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应用生态学报 ›› 2023, Vol. 34 ›› Issue (6): 1563-1571.doi: 10.13287/j.1001-9332.202306.014

• 研究论文 • 上一篇    下一篇

基于稻瘟病的水稻抗逆性对CO2浓度和温度升高的响应

韦兆伟, 陈若谷, 殷楠, 柯浩楠, 沙雅晴, 赵峻池, 李琪, 胡正华*   

  1. 南京信息工程大学应用气象学院, 南京 210044
  • 收稿日期:2022-10-31 接受日期:2023-04-14 出版日期:2023-06-15 发布日期:2023-12-15
  • 通讯作者: *E-mail: zhhu@nuist.edu.cn
  • 作者简介:韦兆伟, 男, 1998年生, 硕士研究生。主要从事气候变化农业生态研究。E-mail: 921204018@qq.com
  • 基金资助:
    国家自然科学基金项目(42071023)、江苏省研究生科研创新计划项目(KYCX22_1176)和南京信息工程大学大学生创新创业训练计划项目(XJDC202210300490, XJDC202210300505)

Response of rice resistance based on the validation of rice blast to elevated CO2 concentration and temperature

WEI Zhaowei, CHEN Ruogu, YIN Nan, KE Haonan, SHA Yaqing, ZHAO Junchi, LI Qi, HU Zhenghua*   

  1. School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2022-10-31 Accepted:2023-04-14 Online:2023-06-15 Published:2023-12-15

摘要: 水稻抗逆性是水稻对各种胁迫的抵御能力,其变化对水稻产量安全具有重要影响,但有关其对大气CO2浓度和温度升高的响应尚不清楚。本研究依托开顶式气室组成的CO2浓度和温度自动调控平台,以南粳9108和金香玉1号2个水稻品种为试验材料,设置背景大气CO2浓度和气温(CK,对照)、CO2浓度升高(C,CO2浓度比CK升高200 μmol·mol-1,气温不变)、温度升高(T,气温比CK升高2 ℃,CO2浓度不变)、CO2浓度和温度共同升高(CT,CO2浓度比CK升高200 μmol·mol-1,气温比CK升高2 ℃)4种处理,在水稻关键生育期剪取植株最上部功能叶,测定超氧化物歧化酶活性、硅、总黄烷醇、丙二醛、可溶性糖、脯氨酸和可溶性蛋白质含量,并采用主成分分析法分析不同处理下抗逆性指标组成差异,筛选整合得到水稻抗逆性指数(RSRI),以评估水稻抗逆性。从水稻抗病性角度,在水稻成熟期统计穗颈瘟病情验证RSRI对水稻抗逆性的表达程度。结果表明: 在水稻拔节-孕穗期,与CK相比,C和CT处理使金香玉1号的RSRI分别显著降低36.5%和41.1%;T处理使两个品种的RSRI分别显著降低44.9%和33.8%。RSRI能解释穗颈瘟病情71.9%~74.3%的变异。综上,温度升高对两个水稻品种拔节-孕穗期的抗逆性均有不利影响,且CO2浓度与温度升高对水稻抗逆性有一定交互作用;与南粳9108相比,金香玉1号抗逆性更易受到CO2浓度升高的影响。

关键词: CO2浓度, 温度, 水稻, 抗逆性指数, 稻瘟病

Abstract: Rice (Oryza sativa) resistance is its ability to resist various stresses, the changes of which have important impacts on O. sativa yield security. However, the responses of O. sativa stress resistance to elevated atmospheric CO2 concentration and temperature are poorly understood. We conducted a field open top-chamber experiment with O. sativa (Nanjing 9108 and Jinxiangyu I) based on the CO2 and temperature automatic control platform. The experimental treatments included ambient CO2 concentration and temperature treatment (CK, control), elevated CO2 concentration treatment (C, CO2 concentration increase of 200 μmol·mol-1 above CK), elevated temperature treatment (T, temperature increase of 2 ℃ above CK) and elevated CO2 concentration and temperature (CT, CO2 concentration increase of 200 μmol·mol-1 and temperature increase of 2 ℃ above CK). At the critical growth stages of O. sativa, we measured superoxide dismutase activity, silica content, total flavanol content, malondialdehyde content, soluble sugar content, proline content, and soluble protein content by cutting the uppermost functional leaves. We obtained the rice stress resistance index (RSRI) by principal component analysis to analyze the differences in the composition of stress resistance indicators under different treatments. Considering the disease resistance of O. sativa, the spike neck blast disease was counted to verify the expression level of RSRI for O. sativa stress resistance at maturity stage. Results showed that at the elongation-booting stage, C and CT treatments significantly reduced the RSRI of Jinxiangyu I by 36.5% and 41.1%, respectively, compared with CK. T treatment significantly decreased the RSRI of the two varieties by 44.9% and 33.8%, respectively. The RSRI explained 71.9%-74.3% of the variation in the spike neck blast disease. Overall, the stress resistance of two O. sativa varieties were adversely affected by elevated temperature at the elongation-booting stage. There was an interactive effect of CO2 concentration and temperature on O. sativa stress resistance. Compared with Nanjing 9108, the stress resistance of Jinxiangyu I was more sensitive to elevated CO2 concentration.

Key words: CO2 concentration, temperature, Oryza sativa, stress resistance index, Oryza sativa blast