Skip to main content
 

 

 

Increasing atmospheric CO2 differentially supports arsenite stress mitigating impact of arbuscular mycorrhizal fungi in wheat and soybean plants

Author name : Samy AbdelHamid Selim AbdelSalam
Publication Date : 2022-02-16
Journal Name : Chemosphere

Abstract

Arbuscular mycorrhizal fungi (AMF) are beneficial for the plant growth under heavy metal stress. Such beneficial effect is improved by elevated CO2 (eCO2). However, the mechanisms by which eCO2 improves AMF symbiotic associations under arsenite (AsIII) toxicity are hardly studied. Herein, we compared these regulatory mechanisms in species from two agronomical important plant families - grasses (wheat) and legumes (soybean). AsIII decreased plant growth (i.e., 53.75 and 60.29% of wheat and soybean, respectively) and photosynthesis. It also increased photorespiration and oxidative injury in both species, but soybean was more sensitive to oxidative stress as indicated by higher H2O2 accumulation and oxidation of protein and lipid. eCO2 significantly improved AMF colonization by increasing auxin levels, which induced high carotenoid cleavage dioxygenase (CCDs) activity, particularly in soybean roots. The improved sugar metabolism in plant shoots by co-application of eCO2 and AsIII allocated more sugars to roots sequentially. Sugar accumulation in plant roots is further induced by AMF, resulting in more C skeletons to produce organic acids, which are effectively exudated into the soil to reduce AsIII uptake. Exposure to eCO2 reduced oxidative damage and this mitigation was stronger in soybean. This could be attributed to a greater reduction in photorespiration as well as a stronger antioxidant and detoxification defence systems. The grass/legume-specificity was supported by principal component analysis, which revealed that soybean was more affected by AsIII stress and more responsive to AMF and eCO2. This study provided a mechanistic understanding of the impact of AMF, eCO2 and their interaction on As-stressed grass and legume plants, allowing better practical strategies to mitigate AsIII phytotoxicity.

Keywords

Elevated CO(2); ROS; Rhizophagus irregularis; Soybean; Strigolactones; Sugars; Wheat.

Publication Link

https://doi.org/10.1016/j.chemosphere.2022.134044

Block_researches_list_suggestions

Suggestions to read

Photocurrent and electrical properties of SiGe Nanocrystals grown on insulator via Solid-state dewetting of Ge/SOI for Photodetection and Solar cells Applications
MOHAMMED OMAR MOHAMMEDAHMED IBRAHIM
Comparative analysis of high-performance UF membranes with sulfonated polyaniline: Improving hydrophilicity and antifouling capabilities for water purification
EBTSAM KHALEFAH H ALENEZY
Efficient framework for energy management of microgrid installed in Aljouf region considering renewable energy and electric vehicles
Ali fathy mohmmed ahmed
Comparative analysis of high-performance UF membranes with sulfonated polyaniline: Improving hydrophilicity and antifouling capabilities for water purification
AHMED HAMAD FARHAN ALANAZI
Contact