Plant Endophytic Fungus Extract ZNC Improved Potato Immunity, Yield, and Quality

Area of Science:

• Agricultural Science
• Plant Pathology
• Mycology

Background:

• Endophytic fungi metabolites are crucial for plant growth and immunity.
• The specific mechanisms of Zhinengcong (ZNC) from Paecilomyces variotii in potato remain largely unknown.
• Understanding the balance between plant growth and immunity is vital for crop development.

Purpose of the Study:

• To investigate the effects of ZNC on potato growth, yield, and immunity against Phytophthora infestans.
• To elucidate the mechanisms underlying ZNC's impact on plant defense and growth.
• To evaluate the trade-off between enhanced growth and immunity in potatoes treated with ZNC.

Main Methods:

• Field and indoor trials were conducted over two years.
• ZNC was applied via irrigation and foliar spray at various concentrations.
• Plant growth, yield, tuber quality, disease resistance, and gene expression were analyzed.

Main Results:

• ZNC significantly increased potato yield by up to 66.68% and improved tuber quality (Vitamin C, protein, starch, sugar).
• ZNC enhanced plant immunity by inducing reactive oxygen species (ROS) and stimulating the PAMP-triggered immunity (PTI) pathway.
• ZNC promoted plant growth, nitrogen absorption, and indoleacetic acid (IAA) gene expression, while effectively controlling potato blight disease.

Conclusions:

• ZNC extract from Paecilomyces variotii effectively balances potato growth and immunity.
• ZNC demonstrates significant potential for enhancing crop yield, quality, and disease resistance in agricultural applications.
• The study highlights ZNC as a promising bio-agent for sustainable agriculture.