Climate change impedes plant immunity mechanisms

Son, Seungmin; Park, Sang Ryeol

doi:10.3389/fpls.2022.1032820

Cited by 13 publications

(7 citation statements)

References 173 publications

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“…Earlier, we demonstrated that indoleamines were crucial in mitigating climate stress and improving reproduction processes in cold‐sensitive hazelnut cultivars and the modulation patterns in endogenous indoleamine titers could be correlated to poor performances of cold‐sensitive hazelnut cultivars grown in the colder continental climate 19,71,72,76–79 . Our study in the hazelnut also suggested a powerful mitigation when the dormant stem cuttings were exposed to sudden summer‐like conditions in the presence of TRP or SER in parallel to improved flowering 19 .…”

Section: Discussionsupporting

confidence: 59%

Stable indoleamines attenuate stress—A novel paradigm in tryptophan metabolism in plants

Ayyanath,

Shukla,

Sriskantharajah

et al. 2024

Journal of Pineal Research

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Stability of metabolites in harsh environments such as drought, temperature, and light suggest their untapped potential in processes the plants utilize in mitigation of abiotic and biotic stresses. Such metabolites could be nonspecific to microorganisms, plants, or animals. Many of the indoleamines are ubiquitous throughout species and have been shown to mitigate a wide range of stresses. We tested the role of indoleamine metabolites via exogenous application of the precursor tryptophan (TRP) on strawberry due to the short reproductive life cycle and its temperate traits. Seasonal responses appeared to be perturbed with exogenous application of TRP as a combination of foliar (3 mg/L) and ground drench (100 mg/L) or ground drench only (100 mg/L). The treatment yielded growth stimulatory responses besides mitigating stress, that is, short photoperiod and cold temperature. Plants preparing into dormancy reverted to produce green foliage and flowers that set fruit in unfavorable climate in the month of November where the untreated plants senesced. Analyses of the endogenous indoleamines in flowers and fruits of the treated plants indicated that the titers and ratios of the metabolites NAS, 2‐hydroxymelatonin, and N(1)‐acetyl‐N(2)‐formyl‐5‐methoxykynuramine assisted in the stress mitigation. The ASMT and M2H gene regulations emphasized the stability of intermediate metabolites of TRP. The TDC and T5H regulation explained the detection of a rare to find compound, 5‐hydroxytryptophan, in strawberry. This is the first report on detection of eight indoleamines in strawberry alongside the regulatory genes in the indoleamine pathway. Inclining climate crisis demands climate‐resilient plants in quick time and the indoleamine toolkit may offer the opportunity to develop simple and effective practices to manage stress tolerance in plants.

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Section: Discussionsupporting

confidence: 59%

Stable indoleamines attenuate stress—A novel paradigm in tryptophan metabolism in plants

Ayyanath,

Shukla,

Sriskantharajah

et al. 2024

Journal of Pineal Research

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“…Conversely, the lesion size on the resistant cultivar was tripled when incubated at 28ºC compared to those at 21ºC. The reduction of the lesion size on the susceptible cultivar may result from lower pathogen virulence, enhanced physiological vigor of the plant (eg., leaf area), and stomatal closure, which reduces pathogen penetration 26,27 . Furthermore, the impact of temperature on the resistance gene and its diminished e cacy might be cited as a potential cause for the larger spot size realized at 28ºC compared to 21ºC.…”

Section: Investigating the Metabolite Pro Le Via Multivariate Analysismentioning

confidence: 99%

Studying temperature's impact on Brassica napus resistance in order to identify key regulatory mechanisms using comparative metabolomics

Amjadi,

Hamzehzarghani,

Rodriguez

et al. 2024

Preprint

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To investigate the effects of temperature on Brassica napus (canola) resistance to Leptosphaeria maculans (LM) the causal agent of blackleg disease, metabolic profiles of LM infected resistant (R) and susceptible (S) canola cultivars at 21ºC and 28ºC were analyzed. Metabolites were detected in cotyledons of R and S plants at 48- and 120-hours post-inoculation with LM using UPLC-QTOF/MS. The mock-inoculated plants were used as controls. Some of the resistance-related specific pathways, included lipid metabolism, amino acid metabolism, carbohydrate metabolism, and aminoacyl-tRNA biosynthesis, were down-regulated in S cultivar but up-regulated in R cultivar at 21ºC. However, some of these pathways were down-regulated in R cultivar at 28°C. Amino acid metabolism, lipid metabolism, alkaloid biosynthesis, phenylpropanoid biosynthesis, and flavonoid biosynthesis were the pathways linked to combined heat and pathogen stresses. By using network analysis and enrichment analysis, these pathways were identified as important. The pathways of carotenoid biosynthesis, pyrimidine metabolism, and lysine biosynthesis were identified as unique mechanisms related to heat stress and may be associated to the breakdown of resistance to the pathogen. The increased susceptibility of R plants to 28°C results in the down-regulation of signal transduction pathway components and compromised signaling, particularly during the later stages of infection. Deactivating LM-specific signaling networks in R plants may result in compatible responses, potentially drop in signaling metabolites under combined stress, highlighting global temperature challenges.

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“…Under ever-changing environmental conditions, plants have to deal with several abiotic and biotic adversities, which frequently have a negative impact on their productivity and growth [1]. For that reason, plants have evolved complex functional and genetic adaptation mechanisms that can be activated to counteract/cope with oxidative reactions, while continuing growth (even though at a decreased rate) and reaching a fruitful yield [2]. According to Munns and Millar [3], these mechanisms are related to taking up vital resources, while storing and supplying them to various plant parts, to produce the energy required for cellular functions, maintain tissue integrity, transmit signals among plant parts, arrange structural assets under changed environmental conditions, and shape-shift through development.…”

Section: Introductionmentioning

confidence: 99%

Ozone Treatment as an Approach to Induce Specialized Compounds in Melissa officinalis Plants

Scimone,

Carucci,

Risoli

et al. 2024

Plants

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Plants are constantly subjected to environmental changes that deeply affect their metabolism, leading to the inhibition or synthesis of “specialized” compounds, small organic molecules that play a fundamental role in adaptative responses. In this work, Melissa officinalis L. (an aromatic plant broadly cultivated due to the large amounts of secondary metabolites) plants were exposed to realistic ozone (O3) dosages (80 ppb, 5 h day−1) for 35 consecutive days with the aim to evaluate its potential use as elicitor of specialized metabolite production. Ozone induced stomatal dysfunction throughout the whole experiment, associated with a low photosynthetic performance, a decrease in the potential energy conversion activity of PSII, and an alteration in the total chlorophyll content (−35, −36, −10, and −17% as average compared to the controls, respectively). The production of hydrogen peroxide at 7 days from the beginning of exposure (+47%) resulted in lipid peroxidation and visible injuries. This result suggests metabolic disturbance within the cell and a concomitant alteration in cell homeostasis, probably due to a limited activation of antioxidative mechanisms. Moderate accumulated doses of O3 triggered the accumulation of hydroxycinnamic acids and the up-regulation of the genes encoding enzymes involved in rosmarinic acid, phenylpropanoid, and flavonoid biosynthesis. While high accumulated doses of O3 significantly enhanced the content of hydroxybenzoic acid and flavanone glycosides. Our study shows that the application of O3 at the investigated concentration for a limited period (such as two/three weeks) may become a useful tool to stimulate bioactive compounds production in M. officinalis.

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Climate change impedes plant immunity mechanisms

Cited by 13 publications

References 173 publications

Stable indoleamines attenuate stress—A novel paradigm in tryptophan metabolism in plants

Stable indoleamines attenuate stress—A novel paradigm in tryptophan metabolism in plants

Studying temperature's impact on Brassica napus resistance in order to identify key regulatory mechanisms using comparative metabolomics

Ozone Treatment as an Approach to Induce Specialized Compounds in Melissa officinalis Plants

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