Exogenous proline activated an integrated response of NER and HR pathways to reduce DNA damage in rice seedlings under chromium stress

Yi, Kechu; Zhang, Qing; Feng, Yuxi; Yang, Li; Yu, Xiao-Zhang

doi:10.1007/s11356-023-26009-1

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…61−63 Both the addition of Pro to soil, and the promotion of Pro metabolism via molecular tools in rice plants could enhance the tolerance of the rice plant to heavy metals. 64,65 Here, the elevated Pro concentration in rice plants at the ASM may be attributed to the production of Pro to alleviate oxidative stress induced by high MeHg loads. 66,67 Tyr also has significant antioxidant and osmolyte activities and it is likely involved in MeHg accumulation in rice plants.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

“…Pro is an amino acid that plays a crucial role in maintaining cellular homeostasis via osmotic regulation . Some plant species (e.g., rice, Lemna minor ) caused lipid peroxidation and hydrogen peroxide (H 2 O 2 ) accumulation after Hg stress, which is able to produce high Pro levels to alleviate oxidative stress. − Both the addition of Pro to soil, and the promotion of Pro metabolism via molecular tools in rice plants could enhance the tolerance of the rice plant to heavy metals. , Here, the elevated Pro concentration in rice plants at the ASM may be attributed to the production of Pro to alleviate oxidative stress induced by high MeHg loads. , …”

Section: Resultsmentioning

confidence: 99%

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New Insights into MeHg Accumulation in Rice (Oryza sativa L.): Evidence from Cysteine

Man,

Wang,

Wang

et al. 2024

Environ. Sci. Technol.

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The intake of methylmercury (MeHg)-contaminated rice poses immense health risks to rice consumers. However, the mechanisms of MeHg accumulation in rice plants are not entirely understood. The knowledge that the MeHg−Cysteine complex was dominant in polished rice proposed a hypothesis of co-transportation of MeHg and cysteine inside rice plants. This study was therefore designed to explore the MeHg accumulation processes in rice plants by investigating biogeochemical associations between MeHg and amino acids. Rice plants and underlying soils were collected from different Hgcontaminated sites in the Wanshan Hg mining area. The concentrations of both MeHg and cysteine in polished rice were higher than those in other rice tissues. A significant positive correlation between MeHg and cysteine in rice plants was found, especially in polished rice, indicating a close geochemical association between cysteine and MeHg. The translocation factor (TF) of cysteine showed behavior similar to that of the TF of MeHg, demonstrating that these two chemical species might share a similar transportation mechanism in rice plants. The accumulation of MeHg in rice plants may vary due to differences in the molar ratios of MeHg to cysteine and the presence of specific amino acid transporters. Our results suggest that cysteine plays a vital role in MeHg accumulation and transportation inside rice plants.

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Section: ■ Results and Discussionmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

New Insights into MeHg Accumulation in Rice (Oryza sativa L.): Evidence from Cysteine

Man,

Wang,

Wang

et al. 2024

Environ. Sci. Technol.

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“…This is most likely due to the higher Cr accumulation in the roots of rice plants. In our previous study, the accumulation of Cr was higher in the roots than in the shoots of rice seedlings [ 19 ]. On the other hand, shoots have fever genes than roots that were induced by Cr treatments, because Cr translocation from the roots to the shoots is very limited [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

“…Under 'CrP' treatments, the number of upregulated DEGs that are associated with cellulose, hemicellulose, lignin, and pectin pathways in rice roots under 12.0, 24.0, and 40.0 mg/L 'Cr' treatments were 15 (5, 2, 7, 1), 11 (5, 2, 4, 0), and 31 (9,7,9,6), respectively, while the numbers of downregulated DEGs associated with cellulose, hemicellulose, lignin, and pectin pathways in rice roots under 12.0, 24.0, and 40.0 mg/L 'CrP' treatments were 56 (17,19,6,14), 65 (19,21,8,17), and 61 (22,18,8,13), respectively. The numbers of upregulated DEGs in rice shoots that are categorized in cellulose, hemicellulose, lignin, and pectin pathways under 12.0, 24.0, and 40.0 mg/L 'CrP' treatments were 8 (4, 2, 2, 0), 7 (4, 1, 1, 1), and 26 (9,1,4,12), respectively.…”

Section: Differentially Expressed Genes Associated With Cell Wall Pat...mentioning

confidence: 99%

Identification of the Key Genes Involved in Proline-Mediated Modification of Cell Wall Components in Rice Seedlings under Trivalent Chromium Exposure

Ullah,

Lin,

Zhang

et al. 2023

Toxics

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Chromium (Cr) toxicity exerts a detrimental effect on various physiological, biochemical, and molecular attributes of plants including the structure and functions of cell walls. On the other hand, the exogenous application of proline (Pro) is a beneficial strategy to overcome Cr toxicity. Therefore, it is a novel strategy to find the key genes associated with cell wall composition in rice under trivalent Cr with/without Pro application. A total of 203 genes were activated in the four cell wall biosynthesis pathways under chromium stress, namely cellulose (60), hemicellulose (57), lignin (35), and pectin (51). Based on the expression abundance of microarrays, the number of differentially expressed genes, and the expression level of genes, the lignin pathway was a crucial pathway in response to Cr treatments, followed by the cellulose pathway. Through the estimation of gene expression variation factors between ‘Cr’ and ‘Cr+Pro’ treatments, OsUGP1, OsBGLU24, OsBGLU29, OsBGLU33, OsBMY1, and OsBMY2 in the cellulose pathway; OsXTH9, OsXTH10, OsXTH16, OsGAUT3, OsGAUT19, OsGAUT28, OsXTH1, OsGAUT12, and OsGAUT21 in the hemicellulose pathway; OsPAL3, OsPAL3, OsPOX1, and OsPRX77 in the lignin pathway; and OsPME25, OsPGL27, OsPME26, OsPGL9, and OsPLL12 in the pectin pathway are the key genes involved in cell wall modification during Cr exposure with exogenous Pro application. The Pro-mediated activation of these genes could be crucial players in modifying the cell wall structure and composition of rice plants under Cr stress, which needs to be further clarified.

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Response to gallium (Ga) exposure and its distribution in rice plants

Zhang,

Ullah,

Tian

et al. 2023

Environ Sci Pollut Res

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Exogenous proline activated an integrated response of NER and HR pathways to reduce DNA damage in rice seedlings under chromium stress

Cited by 4 publications

References 42 publications

New Insights into MeHg Accumulation in Rice (Oryza sativa L.): Evidence from Cysteine

New Insights into MeHg Accumulation in Rice (Oryza sativa L.): Evidence from Cysteine

Identification of the Key Genes Involved in Proline-Mediated Modification of Cell Wall Components in Rice Seedlings under Trivalent Chromium Exposure

Response to gallium (Ga) exposure and its distribution in rice plants

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