Physiological and molecular bases of the nickel toxicity responses in tomato.
Hao YuWeimin LiXiaoxiao LiuQianqian SongJunjun LiJin XuPublished in: Stress biology (2024)
Nickel (Ni), a component of urease, is a micronutrient essential for plant growth and development, but excess Ni is toxic to plants. Tomato (Solanum lycopersicum L.) is one of the important vegetables worldwide. Excessive use of fertilizers and pesticides led to Ni contamination in agricultural soils, thus reducing yield and quality of tomatoes. However, the molecular regulatory mechanisms of Ni toxicity responses in tomato plants have largely not been elucidated. Here, we investigated the molecular mechanisms underlying the Ni toxicity response in tomato plants by physio-biochemical, transcriptomic and molecular regulatory network analyses. Ni toxicity repressed photosynthesis, induced the formation of brush-like lateral roots and interfered with micronutrient accumulation in tomato seedlings. Ni toxicity also induced reactive oxygen species accumulation and oxidative stress responses in plants. Furthermore, Ni toxicity reduced the phytohormone concentrations, including auxin, cytokinin and gibberellic acid, thereby retarding plant growth. Transcriptome analysis revealed that Ni toxicity altered the expression of genes involved in carbon/nitrogen metabolism pathways. Taken together, these results provide a theoretical basis for identifying key genes that could reduce excess Ni accumulation in tomato plants and are helpful for ensuring food safety and sustainable agricultural development.
Keyphrases
- metal organic framework
- oxidative stress
- transition metal
- risk assessment
- plant growth
- oxide nanoparticles
- human health
- reactive oxygen species
- heavy metals
- diabetic rats
- poor prognosis
- genome wide
- gene expression
- physical activity
- high glucose
- health risk
- minimally invasive
- transcription factor
- mass spectrometry
- stress induced
- binding protein
- tandem mass spectrometry
- carbon nanotubes