Synergistic Effects of <i>Trichoderma harzianum</i> and Light Quality on Photosynthetic Carbon Metabolism and Growth in Tomato Plants
The genus <i>Trichoderma</i> comprises a group of fungi known for their beneficial effects on plant growth and stress tolerance. Light is a key environmental factor affecting many plant physiological processes. However, a significant research gap remains regarding the interaction between...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/15/6/1362 |
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| Summary: | The genus <i>Trichoderma</i> comprises a group of fungi known for their beneficial effects on plant growth and stress tolerance. Light is a key environmental factor affecting many plant physiological processes. However, a significant research gap remains regarding the interaction between light quality and <i>Trichoderma harzianum</i> inoculation, particularly their combined effects on tomato plant growth and photosynthetic efficiency. Here, we showed that <i>T. harzianum</i> inoculation effectively alleviated the growth inhibition caused by monochromatic red light or blue light in tomato plants. Combined red and blue light treatment with <i>T. harzianum</i> inoculation (RBT) promoted root development by regulating the rational distribution of carbon assimilation products. Specifically, the RBT treatment upregulated the expression of photosynthesis-related genes, including key Calvin cycle enzyme genes such as <i>FBPase</i>, <i>FBPA</i>, <i>TPI</i>, and <i>SBPase</i>, as well as the light signal transduction factor <i>HY5.</i> In addition, <i>T. harzianum</i> inoculation increased the maximal photochemical efficiency of PSII (Fv/Fm), and the net photosynthetic rate (Pn). The activity of sucrose synthetase (SS) and sucrose phosphate synthetase (SPS) was also enhanced, promoting photosynthetic product accumulation in leaves and roots. Among all treatment groups, RBT performed the best in the above indexes. |
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| ISSN: | 2073-4395 |