Secondary Metabolite Engineering for Plant Immunity Against Various Pathogens

Singh, Devendra; Pandey, Himanshu; Dhiman, Vivek Kumar; Bang, Nguyen Tran Hai; Dhiman, Vinay Kumar; Singh, Virendra; Pandey, Devendra Kumar

doi:10.1007/978-981-16-7262-0_5

Cited by 8 publications

(5 citation statements)

References 86 publications

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“…e PGPR has a variety of roles in plant nutrition, protection, and hormone behavior with environmental changes [15][16][17][18], their part in in uencing the rhizosphere is critically important. e increase in available N contents in soil may be due to the mineralization of organic matter and xation of atmospheric nitrogen by the symbiotic rhizobial isolates.…”

Section: Discussionmentioning

confidence: 99%

Effect of rhizobial isolates and nitrogen fertilizer on shisham (Dalbergia sissoo Roxb.) soil properties

2023

JPRI

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A treatment combination of isolates and N-based fertilizer was observed for effect on the rhizospheric soil of Dalbergia sissoo. Various blends of two plant growth-promoting rhizobacteria (PGPR1 and PGPR2) and nitrogen fertilizers (Treatments T1 to T10) have been applied to analyze their effects on the rhizospheric soil’s microbial count, physicochemical properties, and available soil NPK contents. The treatments did not produce any significant changes in the soil’s pH, electrical conductivity, or organic carbon content. However, a significant increase was observed in the nitrogen, phosphorus, and potassium contents of the rhizospheric soil, with the highest increase observed in soil treated with treatment T4, composed of the two rhizobacterial isolates utilized in this study.

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Section: Discussionmentioning

confidence: 99%

Effect of rhizobial isolates and nitrogen fertilizer on shisham (Dalbergia sissoo Roxb.) soil properties

2023

JPRI

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“…It is noticed that roots adsorb/absorb and trap the HMs in the root tissues, mitigating their flow into the aerial parts. The effects in plant roots are observed as root browning, decreased root length, and increased root diameter, and enlarged parenchymatic and cortical tissues . Changes in the root system architecture in response to metal stress are directly correlated with the ability of a plant to develop tolerance against the HMs stress .…”

Section: Defense Strategies Used By Plants To Combat Heavy Metal Stressmentioning

confidence: 99%

“…Previous literature studies suggest that under stress conditions (biotic or abiotic), a plant initiates a defense strategy based on the attacking pathogen or the stress condition it receives. , However, the symptoms under any stress conditions are quite similar, such as leaf discoloration, chlorosis, necrosis, reduced growth, altered levels of gene expression, and biochemical reactions. However, the plant system is much more complex to perceive different signals from the stressing factors and has different receptors that recognize the invaders (weather pathogen or metals), identify these signals, initiate a signal transduction cascade, and employ a particular defense strategy.…”

Section: Can a Plant’s Response Be Used As A Biomarker For Accessing ...mentioning

confidence: 99%

“…The effects in plant roots are observed as root browning, decreased root length, and increased root diameter, and enlarged parenchymatic and cortical tissues. 38 Changes in the root system architecture in response to metal stress are directly correlated with the ability of a plant to develop tolerance against the HMs stress. 39 Apart from this, the morphological and physiological changes in the root and shoot system also help plants to encounter HM stress as shown in Figure 1.…”

Section: Defense Strategies Used By Plants To Combat Heavy Metal Stressmentioning

confidence: 99%

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Plant Defense Strategies and Biomarkers against Heavy Metal-Induced Stress: A Comprehensive Review

Tyagi,

Dhiman,

Dhiman

et al. 2024

ACS Agric. Sci. Technol.

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Plants respond to environmental pollutants and experience several abiotic stresses, among which heavy metal stress has been a serious concern in the global scientific community due to its yield-limiting effects on crop plants. Heavy metals intrude into the plant defense system and interfere with the cellular machinery, leading to metal toxicity and resulting in plant growth inhibition or death. Plants employ several counterbalance strategies, such as the formation of phytochelatins or metallothionein metal complexes, or vacuolar sequestration of ligand–metal complexes, etc., to combat heavy metal stress. Additionally, microbes present in the rhizospheric region share a special relationship with plants and immobilize heavy metals to improve plant health. Thus, the precise detection of heavy metals in adjoining environments is crucial to develop strategic defense strategies for sustainable agriculture. In this context, plant-based biomarkers have evolved as a promising approach. This review sheds light on heavy metal stress, various defense strategies employed by plants, and potential biomarkers used to detect heavy metal stresses and tries to draw a possible roadmap toward smart and sustainable agriculture.

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“…Previous studies have indicated that increases in SA content were induced by seaweed-derived bioactive compounds in various species such as tomato (El Modafar et al, 2012), Arabidopsis (Zhang et al, 2019) or blue gum (Eucalyptus globulus) (Shukla et al, 2016). SA-mediated regulation was dependent on the interaction and cross-talk with other stressinduced signaling molecules such as pipecolic acid, jasmonic acid and ethylene; or other plant growth-related phytohormones such as auxin or abscisic acid (Navarro et al, 2008;Shields et al, 2022;Singh et al, 2022).In addition to SA, IAA is the main type of auxin in plants that contributes to fundamental physiological and biochemical processes (Zhao, 2010). In our study, a high abundance of IAA-glucose, an inactive form of IAA (Korasick et al, 2013) was observed at day 0 while the active form, IAA and its degraded product (oxIAA) were reduced.…”

Section: Lipids Amino Acids Carbohydrates and Other Primary Metabolit...mentioning

confidence: 99%

Comparative metabolomic profiling of Arabidopsis thaliana roots and leaves reveals complex response mechanisms induced by a seaweed extract

Tran

Callahan²,

Islam³

et al. 2023

Front. Plant Sci.

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Seaweed extracts are a prominent class of biostimulants that enhance plant health and tolerance to biotic and abiotic stresses due to their unique bioactive components. However, the mechanisms of action of biostimulants are still unknown. Here, we have used a metabolomic approach, a UHPLC-MS method, to uncover the mechanisms induced following application to Arabidopsis thaliana of a seaweed extract derived from Durvillaea potatorum and Ascophyllum nodosum. We have identified, following the application of the extract, key metabolites and systemic responses in roots and leaves across 3 timepoints (0, 3, 5 days). Significant alterations in metabolite accumulation or reduction were found for those belonging to broad groups of compounds such as lipids, amino acids, and phytohormones; and secondary metabolites such as phenylpropanoids, glucosinolates, and organic acids. Strong accumulations of TCA cycle and N-containing and defensive metabolites such as glucosinolates were also found revealing the enhancement of carbon and nitrogen metabolism and defence systems. Our study has demonstrated that application of seaweed extract dramatically altered the metabolomic profiles of Arabidopsis and revealed differences in roots and leaves that varied across the timepoints tested. We also show clear evidence of systemic responses that were initiated in the roots and resulted in metabolic alterations in the leaves. Collectively, our results suggest that this seaweed extract promotes plant growth and activates defence systems by altering various physiological processes at the individual metabolite level.

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Secondary Metabolite Engineering for Plant Immunity Against Various Pathogens

Cited by 8 publications

References 86 publications

Effect of rhizobial isolates and nitrogen fertilizer on shisham (Dalbergia sissoo Roxb.) soil properties

Effect of rhizobial isolates and nitrogen fertilizer on shisham (Dalbergia sissoo Roxb.) soil properties

Plant Defense Strategies and Biomarkers against Heavy Metal-Induced Stress: A Comprehensive Review

Comparative metabolomic profiling of Arabidopsis thaliana roots and leaves reveals complex response mechanisms induced by a seaweed extract

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