OMICS TECHNOLOGIES FOR HEAVY METAL STRESS TOLERANCE IN PLANTS

Abstract Background: Festuca sinensis is a perennial grass of the genus Festuca, which has strong stress tolerance and high adaptability. F. sinensis normally symbiotic with Epichloë endophyte. In order to evaluate the possibility of F. sinensis-endophyte association as bioremediation grass in heavy metal polluted soils, the effects and mechanism of the F. sinensis-endophyte interaction under heavy metal stress was investigated. Results: The growth performance and physiology variations of F. sinensis with (E+) and without endophyte (E-) were evaluated after they were subjected to Zn2+ and Cd2+ treatments. The results showed that heavy metal treatments had significant effects on plants as the growth indices of plants under Zn2+ and Cd2+ treatments had significant differences compared with plants under control treatment (P<0.05). Zn2+ treatment had positive effects on plants whereas Cd2+ treatment had negative effects. The plants under Cd2+ treatment produced more lolitrem B (P<0.05). Endophyte increased host heavy metal stress tolerance by promoting host growth as the E+ plants had significantly higher plant height, tiller number, root length (P<0.05). Endophyte also promoted host Zn2+ ion absorbing and induced more endogenous hormone production (P<0.05). Conclusions: These results suggested that Epichloë regulated host growth and physiology to improve association tolerance to environmental conditions.

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Serendipita indica Mediated Drought and Heavy Metal Stress Tolerance in Plants

10.1007/978-981-16-2922-8_8 ◽

2021 ◽

pp. 181-194

Author(s):

Surbhi Dabral ◽

Ajit Varma ◽

Deepesh Bhatt ◽

Manoj Nath

Keyword(s):

Heavy Metal ◽

Stress Tolerance ◽

Heavy Metal Stress ◽

Metal Stress

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Overexpression of RsMYB1 enhances heavy metal stress tolerance in transgenic petunia by elevating the transcript levels of stress tolerant and antioxidant genes

10.1101/286849 ◽

2018 ◽

Cited By ~ 1

Author(s):

Trinh Ngoc Ai ◽

Aung Htay Naing ◽

Byung-Wook Yun ◽

Chang Kil Kim

Keyword(s):

Heavy Metal ◽

Stress Tolerance ◽

Sequence Similarity ◽

Abiotic Stress Tolerance ◽

Heavy Metal Stress ◽

Metal Stress ◽

Antioxidant Genes ◽

Resultant Increase ◽

Anthocyanin Production ◽

Transgenic Petunia

AbstractThe RsMYB1 transcription factor (TF) controls the regulation of anthocyanin in radish (Raphanus sativus), and its overexpression in tobacco and petunia strongly enhances anthocyanin production. However, no data exists on whether RsMYB1 is involved in the mechanism that leads to abiotic stress tolerance. Under normal conditions, transgenic petunia plants expressing RsMYB1 and WT were able to thrive by producing well-developed broad leaves and regular roots. In contrast, a reduction in plant growth was observed when they were exposed to heavy metals (CuSO4, ZnSO4, MnSO4, and K2Cr2O7). However, RsMYB1-overexpressing plants were found to be more tolerant to the stresses than the WT plants because the expressions of stress tolerant genes (GSH and PCs) and antioxidant genes (SOD, CAT, and POX) were enhanced. In addition, according to the phylogenetic analysis, RsMYB1 has a strong sequence similarity with other MYB TFs that confer different abiotic stresses. These results suggest that overexpression of RsMYB1 enhances the expression levels of metal-induced stress tolerance genes and antioxidant genes, and the resultant increase in gene expression improves heavy metal stress tolerance in petunia.

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