AM真菌和根瘤菌对旱地玉米植物激素介导和田间生产力的阶段性协同效应

IF 5.6 1区农林科学 Q1 AGRONOMY

Field Crops Research Pub Date : 2025-05-09 DOI:10.1016/j.fcr.2025.109967

Muhammad Abrar , Ying Zhu , Wen-Shan Li , Muhammad Aqeel , Umair Ashraf , Muhammad Maqsood Ur Rehman , Jian-Ming Li , Xiao-Fang Gong , Wasim Khan , Wei Wang , You-Cai Xiong

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引用次数: 0

摘要

气候变化和日益严重的干旱严重影响了半干旱地区的玉米产量。在此背景下，应用丛枝菌根（AM）真菌和促进植物生长的根瘤菌（PGPR）为提高作物抗灾能力提供了一个有希望的解决方案。尽管AM真菌和PGPR具有潜力，但它们对植物生长的协同作用，特别是在旱地玉米关键生长阶段的植物激素信号、光合效率和养分分配方面，仍然知之甚少。目的探讨AM真菌和PGPR对植物激素周期调节的单独和协同作用，以提高旱地玉米产量。方法采用为期2年的田间试验，评价地膜覆盖下AM真菌（Rhizophagus irregularis SUN16和Glomus monosporum WUM11）和PGPR （Azotobacter choococum GSICC 30112和解淀粉芽孢杆菌GSICC 32826）对旱地玉米生育关键时期（孕穗期、出丝期和收获前）的影响。结果单次接种AM真菌、单次接种PGPR真菌及其共接种对植物信号激素有显著影响（p <； 0.5），其中共接种对植物信号激素的影响在PFM下最为显著。值得注意的是，共接种还提高了光合色素（高达85.19 %）和光合作用（高达64.73 %），并改善了养分转运。氮（38.44 ~ 107.79 %）、磷（32.42 ~ 79.62 %）和钾（43.71 ~ 155.97 %）的含量均有增加。这些改善在吐丝和收获前阶段最为明显，养分分配的改善有助于更有效的生物量积累。结论AM真菌和PGPR接种co可提高植物信号激素水平，激活光合过程，改善养分分配，促进半干旱区玉米生长。研究结果强调了与PFM相结合的共接种早期管理的潜力，并可为提高玉米产量提供新的见解。

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Stage-dependent synergistic impacts of AM fungi and rhizobacteria on phytohormone mediation and field productivity in dryland maize

Context

Climate change and increasing drought conditions severely impact maize productivity in semi-arid regions. In this context, the application of arbuscular mycorrhizal (AM) fungi and plant growth-promoting rhizobacteria (PGPR) offers a promising solution to enhance crop resilience. Despite of their potential, the synergistic effects of AM fungi and PGPR on plant growth, particularly regarding phytohormone signaling, photosynthetic efficiency, and nutrient allocation during critical growth stages of dryland maize, remain poorly understood.

Objectives

To investigate the sole and synergistic effects of AM fungi and PGPR on the periodic regulation of phytohormones to enhance the productivity of dryland maize.

Methods

A two-year field experiment was conducted to evaluate the impact of AM fungi (Rhizophagus irregularis SUN16 and Glomus monosporum WUM11), and PGPR (Azotobacter chroococcum GSICC 30112 and Bacillus amyloliquefaciens GSICC 32826) under plastic film mulching (PFM) at critical growth stages (jointing, silking, and pre-harvest) of dryland maize.

Results

We found that sole inoculation with AM fungi, sole PGPR, and their co-inoculation significantly (p < 0.5) influenced plant signaling hormones, with co-inoculation exhibiting the most pronounced effects under PFM. Notably, co-inoculation also enhanced photosynthetic pigments (up to 85.19 %), photosynthesis (up to 64.73 %), along with improved nutrient translocation. Increases were observed in nitrogen (38.44–107.79 %), phosphorus (32.42–79.62 %), and potassium (43.71–155.97 %) concentrations in both shoots and roots. These improvements were most evident at silking and pre-harvest stages, where improved nutrient partitioning contributed to more efficient biomass accumulation.

Conclusions

Co-inoculation with AM fungi and PGPR synergistically boosted plant signaling hormones, activated photosynthetic processes, and improved nutrient distribution, leading to enhanced maize growth under PFM in semi-arid regions.

Implications

Our findings highlight the potential of early management of co-inoculation integrated with PFM and could provide new insights for improving maize productivity.

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来源期刊

Field Crops Research 农林科学-农艺学

CiteScore

9.60

自引率

12.10%

发文量

307

审稿时长

46 days

期刊介绍： Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.