Pest management science · 2025
Nano selenium enhanced tomato resistance to leaf mold via activating salicylic acid defense pathways and regulating metabolic profiles as well as improved plant growth.
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Liu Yuping, Liu Rui, Zhang Ning, Yu Simin, Nie Yufan, Song Dier, Zhang Yue, Li Jia-Qi, Pan Canping, Zhu Wentao, Zhou Zhiqiang, Diao Jinling
Аннотация
BACKGROUND: Disease infection seriously threatens the healthy growth of tomatoes. In recent years, using nanomaterials to suppress crop disease damage has become a hotspot in agriculture. As an emerging nano-material, nano-selenium has been widely reported for improving crop growth and saving the damage caused by stresses such as pathogens and heavy metals on plants.
RESULTS: This study investigated the control of tomato leaf mold (Cladosporium fulvum) by applying nano-Se (5/10/25 mg L-1) on tomato seedlings and explored related mechanisms. We found: (i) Nano-Se applying (especially 10 mg L-1) significantly inhibited tomato leaf mold and reduced disease severity of seedlings (52.84%, 14 days after inoculation). This was because nano-Se significantly promoted the accumulation of salicylic acid (SA) through up-regulating biosynthesis genes expression by significantly up-regulating the gene expression related to MAPK cascade and calcium signaling. This thereby induced the genes expression (NPR1, TGA2/1/5, WRKY33, WRKY70 and WRKY54) of SA signaling pathway, enhancing resistance-genes (PR1/2/3) transcription and elevating antioxidant and resistance-related indicator levels, ultimately activating systemic acquired resistance (SAR) in tomato. Nano-Se also promoted jasmonic acid (JA) signaling pathway. In addition, metabolomic analysis indicated nano-Se promoted phenolic compounds from the phenylpropane pathway (α-tocopherol, chlorogenic acid and ferulic acid), polyamines, GABA and various amino acids accumulation of tomato seedlings, which also supported the above results. (ii) Nano-Se promoted the growth of tomato seedings by enhancing photosynthesis and increasing auxin level.
CONCLUSION: Compared to chemical fungicides, these findings suggested nano-Se provided a more promising and sustainable approach for managing diseases such as leaf mold and improving tomato plant growth. © 2025 Society of Chemical Industry.
RESULTS: This study investigated the control of tomato leaf mold (Cladosporium fulvum) by applying nano-Se (5/10/25 mg L-1) on tomato seedlings and explored related mechanisms. We found: (i) Nano-Se applying (especially 10 mg L-1) significantly inhibited tomato leaf mold and reduced disease severity of seedlings (52.84%, 14 days after inoculation). This was because nano-Se significantly promoted the accumulation of salicylic acid (SA) through up-regulating biosynthesis genes expression by significantly up-regulating the gene expression related to MAPK cascade and calcium signaling. This thereby induced the genes expression (NPR1, TGA2/1/5, WRKY33, WRKY70 and WRKY54) of SA signaling pathway, enhancing resistance-genes (PR1/2/3) transcription and elevating antioxidant and resistance-related indicator levels, ultimately activating systemic acquired resistance (SAR) in tomato. Nano-Se also promoted jasmonic acid (JA) signaling pathway. In addition, metabolomic analysis indicated nano-Se promoted phenolic compounds from the phenylpropane pathway (α-tocopherol, chlorogenic acid and ferulic acid), polyamines, GABA and various amino acids accumulation of tomato seedlings, which also supported the above results. (ii) Nano-Se promoted the growth of tomato seedings by enhancing photosynthesis and increasing auxin level.
CONCLUSION: Compared to chemical fungicides, these findings suggested nano-Se provided a more promising and sustainable approach for managing diseases such as leaf mold and improving tomato plant growth. © 2025 Society of Chemical Industry.