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- Title
镉胁迫下丛枝菌根真菌对小麦生理特性和根际土壤酶活性的影响.
- Authors
郭 晖; 周 慧; 庄静静; 王晓冰
- Abstract
In order to explore the response of arbuscular mycorrhiza fungi (AMF)-wheat symbiote to Cd stress and provide theoretical basis for immobilization remediation in Cd polluted farmland, the photosynthetic and physiological characteristics, antioxidant enzyme activities and rhizosphere soil enzyme activities of wheat without AMF (CK), inoculated with Rhizophagies intraradices (Ri), inoculated with Funneliformis mosseae (Fm) and inoculated with Ri and Fm at 1∶1 (RF) were studied under Cd stress[0 mg/kg (Cd0), 5 mg/kg (Cd5),10 mg/kg (Cd10) and 20 mg/kg (Cd20) Cd]. The results showed that no matter whether AMF was inoculated, specific leaf weight, chlorophyll content, net photosynthetic rate (Pn) of wheat and rhizosphere soil enzyme activities decreased with the increase of Cd content, while malondialdehyde (MDA) content, catalase (CAT), superoxide dismutase (SOD) and peroxidase (POD) activities of wheat leaves increased. AMF inoculation could effectively improve photosynthetic and physiological characteristics, antioxidant enzyme activities and rhizosphere soil enzyme activities of wheat under Cd stress, and the effect was more significant under higher Cd content. RF treatment had the best improving effect on photosynthetic characteristics of wheat under Cd stress, but there was not significant difference in improving antioxidant enzyme and rhizosphere soil enzyme activities among different AMF treatments. Under Cd20,specific leaf weight, chlorophyll a content, chlorophyll b content and Pn of AFM treatment increased most by 14. 56%,13. 79%,13. 68%,16. 92%compared with CK respectively; leaf CAT, SOD, POD activities increased most by 33. 69%,24. 54%,14. 99% respectively; soil sucrase (SC), CAT, urease (UE), dehydrogenase (DHA) activities increased most by 190. 56%,185. 66%,193. 44%,190. 00% respectively; while MDA content decreased by14. 22%—17. 30%. In conclusion, under Cd stress, AMF inoculation could effectively improve the photosynthetic and physiological characteristics, antioxidant enzyme activities and rhizosphere soil enzyme activities of wheat, and RF treatment was better in general.
- Subjects
SOIL enzymology; SUPEROXIDE dismutase; PHOTOSYNTHETIC rates; RHIZOSPHERE; VESICULAR-arbuscular mycorrhizas; PHYTOCHELATINS; UREASE; CYTOKININS
- Publication
Journal of Henan Agricultural Sciences, 2022, Vol 51, Issue 8, p20
- ISSN
1004-3268
- Publication type
Article
- DOI
10.15933/j.cnki.1004‑3268.2022.08.003