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Agronomy
Volume 15
Issue 5
10.3390/agronomy15051225
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

CdGLK1 Transcription Factor Confers Low-Light Tolerance in Bermudagrass via Coordinated Upregulation of Photosynthetic Genes and Enhanced Antioxidant Enzyme Activity

by
Peng Han
,
Jun Liu
,
Jingjin Yu
,
Zhongpeng Liu
,
Fahui He
and
Zhimin Yang
*
College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing 210095, China
*
Author to whom correspondence should be addressed.
Agronomy 2025, 15(5), 1225; https://doi.org/10.3390/agronomy15051225 (registering DOI)
Submission received: 13 April 2025 / Revised: 15 May 2025 / Accepted: 16 May 2025 / Published: 17 May 2025
(This article belongs to the Special Issue New Strategies for Forage Breeding and Cultivation Under Challenging Conditions)
Versions Notes

Abstract

As a widely cultivated warm-season turfgrass, bermudagrass (Cynodon spp.) faces significant challenges in shaded environments due to its inherent low-light sensitivity. While improving photosynthetic adaptation represents a promising strategy to address this limitation, the associated regulatory mechanisms remain insufficiently characterized. In this study, we found that the overexpression of CdGLK1 significantly improved low-light tolerance in bermudagrass by increasing shoot weight, root weight, chlorophyll a, chlorophyll b, net photosynthetic rate (Pn), and maximum quantum yield of photosystem II (Fv/Fm). Furthermore, coordinated upregulation of both C3 and C4 pathway enzymes was observed under low-light stress, accompanied by enhanced antioxidant capacity and reduced photoxidative damage. Transcriptomic profiling further revealed CdGLK1-mediated activation of photosynthetic machinery components spanning light harvesting, electron transport, and carbon fixation modules. These findings establish CdGLK1 as a master integrator of photoprotection and metabolic adaptation under light-limiting conditions, providing both mechanistic insights and practical strategies for developing shade-resilient turfgrass cultivars.
Keywords: bermudagrass; CdGLK1; low-light; RNA-Seq bermudagrass; CdGLK1; low-light; RNA-Seq

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MDPI and ACS Style

Han, P.; Liu, J.; Yu, J.; Liu, Z.; He, F.; Yang, Z. CdGLK1 Transcription Factor Confers Low-Light Tolerance in Bermudagrass via Coordinated Upregulation of Photosynthetic Genes and Enhanced Antioxidant Enzyme Activity. Agronomy 2025, 15, 1225. https://doi.org/10.3390/agronomy15051225

AMA Style

Han P, Liu J, Yu J, Liu Z, He F, Yang Z. CdGLK1 Transcription Factor Confers Low-Light Tolerance in Bermudagrass via Coordinated Upregulation of Photosynthetic Genes and Enhanced Antioxidant Enzyme Activity. Agronomy. 2025; 15(5):1225. https://doi.org/10.3390/agronomy15051225

Chicago/Turabian Style

Han, Peng, Jun Liu, Jingjin Yu, Zhongpeng Liu, Fahui He, and Zhimin Yang. 2025. "CdGLK1 Transcription Factor Confers Low-Light Tolerance in Bermudagrass via Coordinated Upregulation of Photosynthetic Genes and Enhanced Antioxidant Enzyme Activity" Agronomy 15, no. 5: 1225. https://doi.org/10.3390/agronomy15051225

APA Style

Han, P., Liu, J., Yu, J., Liu, Z., He, F., & Yang, Z. (2025). CdGLK1 Transcription Factor Confers Low-Light Tolerance in Bermudagrass via Coordinated Upregulation of Photosynthetic Genes and Enhanced Antioxidant Enzyme Activity. Agronomy, 15(5), 1225. https://doi.org/10.3390/agronomy15051225

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