Exogenously Supplied Trehalose Accelerates Photosynthetic Electron Transport in Heat-Stressed Maize

Luo, Yin; Liu, X. Y.; Fan, Yan; Fan, Yu; Lv, Zhaoyan; Li, W. Q.; Junda, Cen

doi:10.1134/s1021443721050113

Cited by 4 publications

(1 citation statement)

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“…In maize and wheat, trehalose has been shown to alleviate the decrease in the net photosynthetic rate at 42 • C, increase the activity of ribulose-1,5-bisphosphate carboxylase, and promote the Calvin cycle [17]. Furthermore, trehalose can alleviate high-temperature damage by promoting photosynthetic electron transport, protecting proteins, reducing chloroplasts damage, and enhancing antioxidant systems in maize, wheat, and peony [18][19][20][21]. However, the biological function of trehalose in C. sinensis, particularly its role in enhancing heat tolerance, remains poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Physiological and Transcriptome Analyses Reveal the Protective Effect of Exogenous Trehalose in Response to Heat Stress in Tea Plant (Camellia sinensis)

Zheng,

Liu,

Zhou

et al. 2024

Plants

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It is well known that application of exogenous trehalose can enhance the heat resistance of plants. To investigate the underlying molecular mechanisms by which exogenous trehalose induces heat resistance in C. sinensis, a combination of physiological and transcriptome analyses was conducted. The findings revealed a significant increase in the activity of superoxide dismutase (SOD) and peroxidase (POD) upon treatment with 5.0 mM trehalose at different time points. Moreover, the contents of proline (PRO), endogenous trehalose, and soluble sugar exhibited a significant increase, while malondialdehyde (MDA) content decreased following treatment with 5.0 mM trehalose under 24 h high-temperature stress (38 °C/29 °C, 12 h/12 h). RNA-seq analysis demonstrated that the differentially expressed genes (DEGs) were significantly enriched in the MAPK pathway, plant hormone signal transduction, phenylpropanoid biosynthesis, flavone and flavonol biosynthesis, flavonoid biosynthesis, and the galactose metabolism pathway. The capability to scavenge free radicals was enhanced, and the expression of a heat shock factor gene (HSFB2B) and two heat shock protein genes (HSP18.1 and HSP26.5) were upregulated in the tea plant. Consequently, it was concluded that exogenous trehalose contributes to alleviating heat stress in C. sinensis. Furthermore, it regulates the expression of genes involved in diverse pathways crucial for C. sinensis under heat-stress conditions. These findings provide novel insights into the molecular mechanisms underlying the alleviation of heat stress in C. sinensis with trehalose.

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