Targeting of Metabolic Pathways for Genetic Engineering to Combat Abiotic Stress Tolerance in Crop Plants

Chamoli, Shivangi; Verma, Abhishek

doi:10.1007/978-81-322-1620-9_2

Cited by 5 publications

(3 citation statements)

References 97 publications

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“…Furthermore, biotic stress like herbivory also displayed a remarkably similar metabolite profile in plants; while primary metabolites like phenylalanine and allantoin were found to be elevated, the levels of VOCs (specialized metabolites) were also enhanced (Fraire-Velázquez et al, 2011; Du and Wang, 2012; Hayat et al, 2012; Kendziorek et al, 2012; Griesser et al, 2015; Hudson, 2015; Weldegergis et al, 2015; Takagi et al, 2016). Thus, the trend of overproduction of primary and specialized metabolites arising from diverse pathways under similar conditions of stress, further confirms the predominant role of stress as a possible link to elucidate the crosstalk between primary and specialized metabolism (Tuteja, 2007; Bolton, 2009; Qados, 2011; Bhargava and Sawant, 2013; Chamoli and Verma, 2014). …”

Section: Stress Conditions Regulating Primary and Specialized Metabolsupporting

confidence: 57%

“…Additionally, reports suggest that in O. sativa , the presence of W-box elements upstream to the polyamine synthesis gene ( SamDC ) plays a key role in its upregulation (Basu et al, 2014). Furthermore, Ta WRKY93 (WRKY protein from wheat) was found to enhance the levels of Pyrroline-5-carboxylate synthase (P5CS; Qin et al, 2015) involved in proline biosynthesis (Proline is known to be directly involved in drought mitigation as osmoticum; Chamoli and Verma, 2014). It was also noted that WRKYs have a significant role in upregulating several other stress-responsive genes (like ABF3, ABIs, DREB2A, RDs , etc.…”

Section: Stress Conditions Regulating Primary and Specialized Metabolmentioning

confidence: 99%

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Stress-Mediated cis-Element Transcription Factor Interactions Interconnecting Primary and Specialized Metabolism in planta

2016

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Plant specialized metabolites are being used worldwide as therapeutic agents against several diseases. Since the precursors for specialized metabolites come through primary metabolism, extensive investigations have been carried out to understand the detailed connection between primary and specialized metabolism at various levels. Stress regulates the expression of primary and specialized metabolism genes at the transcriptional level via transcription factors binding to specific cis-elements. The presence of varied cis-element signatures upstream to different stress-responsive genes and their transcription factor binding patterns provide a prospective molecular link among diverse metabolic pathways. The pattern of occurrence of these cis-elements (overrepresentation/common) decipher the mechanism of stress-responsive upregulation of downstream genes, simultaneously forming a molecular bridge between primary and specialized metabolisms. Though many studies have been conducted on the transcriptional regulation of stress-mediated primary or specialized metabolism genes, but not much data is available with regard to cis-element signatures and transcription factors that simultaneously modulate both pathway genes. Hence, our major focus would be to present a comprehensive analysis of the stress-mediated interconnection between primary and specialized metabolism genes via the interaction between different transcription factors and their corresponding cis-elements. In future, this study could be further utilized for the overexpression of the specific transcription factors that upregulate both primary and specialized metabolism, thereby simultaneously improving the yield and therapeutic content of plants.

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Section: Stress Conditions Regulating Primary and Specialized Metabolsupporting

confidence: 57%

Section: Stress Conditions Regulating Primary and Specialized Metabolmentioning

confidence: 99%

Stress-Mediated cis-Element Transcription Factor Interactions Interconnecting Primary and Specialized Metabolism in planta

2016

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“…Its backbone is focal to all triglycerides. Glycerol-stimulating genes have been incorporated into tobacco plants to counter abiotic stresses (Chamoli and Verma, 2014). These are known to offer osmotic buffering and membrane protection (Ashraf and Foolad, 2007).…”

Section: Glycerolmentioning

confidence: 99%

Osmolyte Dynamics

Sharma¹,

Bhardwaj²,

Thukral³

et al. 2014

Emerging Technologies and Management of Crop Stress Tolerance

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Association mapping of soybean seed germination under salt stress

et al. 2015

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Soil salinity is a serious threat to agriculture sustainability worldwide. Seed germination is a critical phase that ensures the successful establishment and productivity of soybeans in saline soils. However, little information is available regarding soybean salt tolerance at the germination stage. The objective of this study was to identify the genetic mechanisms of soybean seed germination under salt stress. One natural population consisting of 191 soybean landraces was used in this study. Soybean seeds produced in four environments were used to evaluate the salt tolerance at their germination stage. Using 1142 single-nucleotide polymorphisms (SNPs), the molecular markers associated with salt tolerance were detected by genome-wide association analysis. Eight SNP-trait associations and 13 suggestive SNP-trait associations were identified using a mixed linear model and the TASSEL 4.0 software. Eight SNPs or suggestive SNPs were co-associated with two salt tolerance indices, namely (1) the ratio of the germination index under salt conditions to the germination index under no-salt conditions (ST-GI) and (2) the ratio of the germination rate under salt conditions to the germination rate under no-salt conditions (ST-GR). One SNP (BARC-021347-04042) was significantly associated with these two traits (ST-GI and ST-GR). In addition, nine possible candidate genes were located in or near the genetic region where the above markers were mapped. Of these, five genes, Glyma08g12400.1, Glyma08g09730.1, Glyma18g47140.1, Glyma09g00460.1, and Glyma09g00490.3, were verified in response to salt stress at the germination stage. The SNPs detected could facilitate a better understanding of the genetic basis of soybean salt tolerance at the germination stage, and the marker BARC-021347-04042 could contribute to future breeding for soybean salt tolerance by marker-assisted selection.

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Targeting of Metabolic Pathways for Genetic Engineering to Combat Abiotic Stress Tolerance in Crop Plants

Cited by 5 publications

References 97 publications

Stress-Mediated cis-Element Transcription Factor Interactions Interconnecting Primary and Specialized Metabolism in planta

Stress-Mediated cis-Element Transcription Factor Interactions Interconnecting Primary and Specialized Metabolism in planta

Osmolyte Dynamics

Association mapping of soybean seed germination under salt stress

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