Journal of Integrative Agriculture ›› 2026, Vol. 25 ›› Issue (1): 92-104.DOI: 10.1016/j.jia.2024.03.046

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遮荫和淹水相互作用减少了同化物的积累和再动员过程，从而加剧了夏玉米产量的损失

  

  • 收稿日期:2023-12-31 修回日期:2024-03-13 接受日期:2024-02-04 出版日期:2026-01-20 发布日期:2025-12-05

Shading and waterlogging interactions exacerbate summer maize yield losses by reducing assimilate accumulation and remobilization processes

Qinghao Wang1*, Juan Hu1*, Weizhen Yu1*, Limin Gu2, Peng Liu1, Bin Zhao1, Wenchao Zhen3#, Jiwang Zhang1#, Baizhao Ren1#   

  1. 1 College of Agronomy, Shandong Agricultural University, Tai’an 271018, China
    2 College of Agronomy, Hebei Agricultural University, Baoding 071001, China
    3 State Key Laboratory of North China Crop Improvement and Regulation, Baoding 071001, China
  • Received:2023-12-31 Revised:2024-03-13 Accepted:2024-02-04 Online:2026-01-20 Published:2025-12-05
  • About author:Qinghao Wang, E-mail: 1006231649@qq.com; #Correspondence Baizhao Ren, E-mail: renbaizhao@sina.com; Jiwang Zhang, E-mail: jwzhang@sdau.edu.cn; Wenchao Zhen, E-mail: wenchao@hebau.edu.cn * These authors contributed equally to this study.
  • Supported by:
    This study was supported by the University Youth Innovation Science and Technology Support Program of Shandong Province, China (2021KJ073), the Postdoctoral Innovation Program of Shandong Province, China (202003039), the China Agriculture Research System (CARS-02-21), the State Key Laboratory of North China Crop Improvement and Regulation (NCCIR2023KF-8), and the Key R&D Program of Shandong Province, China (2023TZXD08603).

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摘要：

持续阴雨是夏玉米生产中的一个重要限制因素，对其直接影响是淹水和遮荫的双重压力。然而，关于淹水和遮荫引起玉米产量损失的独立和联合效应的机理研究很少，特别是在不同生育阶段。选用登海605(DH605)在三叶期(V3)、六叶期(V6)和抽雄期(VT)进行遮荫、淹水及其复合胁迫处理。结果表明，遮荫、淹水及其复合胁迫显著限制了叶面积的扩展，降低了叶片净光合速率(Pn)和净同化速率(NAR) ，从而降低了作物生长速率(CGR)和生物量积累。同时，与对照相比，胁迫处理抑制了木质素合成过程，导致茎秆机械强度降低，维管系统发育不良，显著降低同化物对穗部的再运转效率，最终影响籽粒产量。淹水和复合胁迫对产量的影响在V3时期最显著，其次是 V6时期和 VT 时期。遮荫胁迫最显著的影响发生在 VT 时期，其次是 V6和 V3时期。此外，复合胁迫加剧了单一胁迫引起的损失。预测气候变化将增加非生物胁迫组合的频率，这些结果为今后夏玉米在持续降雨条件下的育种研究提供了一定的指导。

Abstract:

Persistent overcast rain was an essential limiting factor for summer maize production, of which immediate impact was the dual pressure of waterlogging and shading.  However, the mechanisms underlying independent and combined effects of waterlogging and shading on maize yield losses remain understudied, particularly across different growth stages.  Denghai 605 (DH605) was selected to be subjected shading, waterlogging, and their combined stress at the 3rd leaf stage (V3), the 6th leaf stage (V6), and tasseling stage (VT).  Results showed that shading, waterlogging and their combination significantly restricted leaf area expansion, reduced leaf net photosynthetic rate (Pn) and net assimilation rate (NAR), thereby decreasing the crop growth rate (CGR) and biomass accumulation.  Additionally, compared to control, the process of lignin synthesis was inhibited under stressed treatment, resulting in diminished stem mechanical strength and impaired vascular system development, which substantially reduced assimilate remobilization efficiency to the ear and ultimate grain yield.  Waterlogging and combined stresses exhibited maximum impact at the V3 stage, followed by V6 and VT stages, while shading effects were most pronounced at the VT stage, followed by V6 and V3 stages.  Moreover, the compound stress exacerbated the damage brought about by a single stress.  As climate change is projected to increase the frequency of multiple abiotic stress occurrences, these findings provide valuable insights for future summer maize breeding research under persistent rainfall conditions.

Key words: maize ,  abiotic stress combination ,  photosynthetic capacity ,  stem development ,  yield