Trichoderma for mitigating the effects of salinity on maize seed germination

Area of Science:

• Agricultural Science
• Plant Pathology
• Microbiology

Background:

• Soil salinity is a major agricultural constraint, negatively impacting crop establishment and yield.
• Sodium chloride (NaCl) stress severely affects seed germination and early seedling development in crops like maize.
• Developing strategies to counteract salinity stress is crucial for food security.

Purpose of the Study:

• To evaluate the efficacy of Trichoderma as a bioagent to mitigate NaCl-induced salinity stress in maize (Zea mays) seed germination.
• To assess the impact of Trichoderma inoculation on key germination and seedling growth parameters under controlled saline conditions.

Main Methods:

• Maize seeds were subjected to varying osmotic potentials to determine salinity sensitivity.
• Seeds were inoculated with two doses of Trichoderma (T1, T2) or a control (T0) and exposed to -0.1 MPa NaCl stress.
• Germination, vigor, seedling length, and dry mass were measured over a 7-day period in a germination chamber.

Main Results:

• Salt stress significantly reduced maize seed vigor, germination rate, seedling length, and dry mass.
• Trichoderma inoculation mitigated the negative effects of NaCl stress, maintaining high germination rates.
• Seedling growth parameters like length and dry mass were partially preserved in Trichoderma-treated groups compared to the control.

Conclusions:

• Trichoderma application effectively counteracts the detrimental effects of soil salinity on maize seed germination and early growth.
• This microorganism shows significant potential as a sustainable bioagent for enhancing maize resilience in salinized agricultural environments.
• Utilizing Trichoderma offers a promising biological solution for improving crop performance under abiotic stress conditions.