Trichoderma harzianum mitigates salt stress in cucumber via multiple responses

Autor: Yang Tongwen, Yunhua Wang, Ma Keshi, Fengshou Tian, Chang Liu, Honglian Ge, Yi Zhang, Faju Chen, Fuli Zhang
Rok vydání: 2019
Předmět:
Chlorophyll
Antioxidant
Health
Toxicology and Mutagenesis
medicine.medical_treatment
Glutathione reductase
0211 other engineering and technologies
Ascorbic Acid
02 engineering and technology
010501 environmental sciences
Plant Roots
Salt Stress
01 natural sciences
Superoxide dismutase
chemistry.chemical_compound
Ascorbate Peroxidases
medicine
Food science
Phenylalanine Ammonia-Lyase
0105 earth and related environmental sciences
Trichoderma
chemistry.chemical_classification
021110 strategic
defence & security studies
Reactive oxygen species
biology
Superoxide Dismutase
Chemistry
Public Health
Environmental and Occupational Health
food and beverages
Trichoderma harzianum
Salt Tolerance
General Medicine
Glutathione
Catalase
biology.organism_classification
Ascorbic acid
Pollution
Glutathione Reductase
Peroxidases
Seedlings
biology.protein
Cucumis sativus
Reactive Oxygen Species
Catechol Oxidase
Peroxidase
Zdroj: Ecotoxicology and Environmental Safety. 170:436-445
ISSN: 0147-6513
DOI: 10.1016/j.ecoenv.2018.11.084
Popis: Trichoderma harzianum T-soybean plays an important role in controlling soybean root rot disease. However, the mechanism by which it improves plant tolerance to salt stress is not clear. In this study, we investigated the possible mechanism of T-soybean in mitigating the damage caused by salt stress in Cucumis sativus L plants. Our results suggest that T-soybean improved salt tolerance of cucumber seedlings by affecting the antioxidant enzymes including peroxidase (POD) (EC 1.11.1.6), polyphenol oxidase (PPO) (EC 1.14.18.1), phenylalanine ammonia-lyase (PAL) (EC 4.3.1.5), catalase (CAT) (EC 1.11.1.6), superoxide dismutase (SOD) (EC 1.15.1.1), ascorbate peroxidase (APX) (EC 1.11.1.11), and glutathione reductase (GR) (EC 1.6.4.2), by increasing the levels of proline, soluble sugars, soluble protein, ascorbic acid (AsA) and chlorophyll as well as improving root activity. Treatment with T-soybean improved the ratio of glutathione (GSH)/oxidized glutathione (GSSG) and AsA/dehydroascorbate (DHA), and up-regulated the expression of CsAPX and CsGR genes involved in the AsA-GSH cycle. In addition, treatment with T-soybean increased the K+ content and K+/Na+ ratio while decreased the Na+ concentration and ethylene level. In summary, the improved salt tolerance of cucumber plants may be due to multiple mechanisms of T-soybean, such as the increase in reactive oxygen species (ROS) scavenging, as well as maintaining osmotic balance and metabolic homeostasis under salt stress.
Databáze: OpenAIRE
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