Roles of Plant-Derived Secondary Metabolites during Interactions with Pathogenic and Beneficial Microbes under Conditions of Environmental Stress

Hiruma, Kiyoshi

doi:10.3390/microorganisms7090362

Cited by 41 publications

(26 citation statements)

References 67 publications

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“…This response maintains an equilibrium between stress tolerance and biomass productivity. Such supporting reports have been illustrated in different algae and cyanobacteria in the recent past [17,23]. Several reports have been stated that under prolonged stress the strain elevates the expression of more proteins to combat it.…”

Section: Discussionsupporting

confidence: 54%

Antioxidant responses against aluminum metal stress in Geitlerinema amphibium

et al. 2020

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In the current scenario, aluminum is one of the major metals that cause environmental pollution and has ill impact on organism health. As around 40% of bauxite deposits of India are available in Odisha, aluminum toxicity in the soil has impacted as an intimidating problem of Odisha. This aluminum metal pollution is regarded as a primary factor for limiting crop productivity in acidic soils of tropic and subtropic countries. The presence of a high degree of aluminum metal in the soil leads to loss of beneficial microflora, i.e., nitrogen-fixing cyanobacteria that play a key role in soil fertility. Hence, this investigation was performed on a filamentous non-heterocystous cyanobacterium Geitlerinema amphibium isolated from the aluminum-polluted sites, i.e., NALCO, Ash pond, Angul to uncover the defense mechanism of the strain exhibited under such stress. The strain was treated with different doses of AlCl 3 (0-100 µM), and we observed redox imbalance leading to oxidative stress. Post-treatment of AlCl 3 , a remarkable decline in growth was evident with possible modifications in pigments associated with the phenomena. Further to combat against the stress under the redox environment, the organism activated antioxidant enzymes CAT, APX, GR, GPX, and SOD which were measured to identify the key responses involved in it. All the stress responsive enzymes were analyzed to demonstrate the interlink between the induction of stress and their detoxification through cellular response. The outcome of the work explored the multifaceted role of oxidative upset caused by AlCl 3 pollutants and the cellular antioxidative strategies deployed by G. amphibium to nullify them.

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Section: Discussionsupporting

confidence: 54%

Antioxidant responses against aluminum metal stress in Geitlerinema amphibium

et al. 2020

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“…The annotation of these TFs is provided in Table S24 . We specifically compiled the TFs that control biosynthesis of secondary metabolites (Table S25 ), which are composed primarily of phenolics, terpenoids, glucosinolates, and alkaloids and have been reported to serve the following roles: (1) protect plants against herbivores and pathogens 65 , 66 and (2) constitute effective compounds in herbs in traditional medicine 67 . This information provides valuable information for further research on secondary metabolites in E. ulmoides .…”

Section: Resultsmentioning

confidence: 99%

High-quality de novo assembly of the Eucommia ulmoides haploid genome provides new insights into evolution and rubber biosynthesis

Wei

Yang

et al. 2020

Hortic Res

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We report the acquisition of a high-quality haploid chromosome-scale genome assembly for the first time in a tree species, Eucommia ulmoides, which is known for its rubber biosynthesis and medicinal applications. The assembly was obtained by applying PacBio and Hi–C technologies to a haploid that we specifically generated. Compared to the initial genome release, this one has significantly improved assembly quality. The scaffold N50 (53.15 MB) increased 28-fold, and the repetitive sequence content (520 Mb) increased by 158.24 Mb, whereas the number of gaps decreased from 104,772 to 128. A total of 92.87% of the 26,001 predicted protein-coding genes identified with multiple strategies were anchored to the 17 chromosomes. A new whole-genome duplication event was superimposed on the earlier γ paleohexaploidization event, and the expansion of long terminal repeats contributed greatly to the evolution of the genome. The more primitive rubber biosynthesis of this species, as opposed to that in Hevea brasiliensis, relies on the methylerythritol-phosphate pathway rather than the mevalonate pathway to synthesize isoprenyl diphosphate, as the MEP pathway operates predominantly in trans-polyisoprene-containing leaves and central peels. Chlorogenic acid biosynthesis pathway enzymes were preferentially expressed in leaves rather than in bark. This assembly with higher sequence contiguity can foster not only studies on genome structure and evolution, gene mapping, epigenetic analysis and functional genomics but also efforts to improve E. ulmoides for industrial and medical uses through genetic engineering.

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“…In such condition, plant increases the concentration of secondary metabolites in its leaf and roots which combat any stressing condition (Yang et al, 2018). The commonly determined secondary metabolites in the plants are proline (Silva et al, 2018), flavonoid contents (Tohge et al, 2018), phenyl propanoids (PPs) (Hiruma, 2019), and glucosinolates (GLs) (Czerniawski and Bednarek, 2018). Phyto-hormonically in host, HR inducing microbes supress the E3 ligase polyubiquitination to inhibit GA 3 from degrading DELLA protein (Li et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Phytohormonal cross-talk modulate Bipolaris sorokiniana (Scc.)interaction with Zea mays

Yousaf

Hussain

Hamayun

et al. 2019

Preprint

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16Besides acting as growth inducing molecule, Gibberellin (GA 3 ) also confers the compatibility 17 of microbial interactions with host. We inoculated 11 days old Z. mays seedlings grown under 18 hydroponic conditions and high GA 3 levels with Bipolaris sorokiniana (BIPOL) at the spore 19 density (SD) of OD 0.6 . The high level of GA 3 negatively affected the growth of the seedlings, 20 accompanied by the high level of stress deducing secondary metabolites (proline, total 21 flavanoids, phenylpropanoids, and glucosinolides). Moreover, high level of GA 3 produced a 22 hypersensitive response (HR) in the seedlings. The HR developed cross talks with IAA and 23 trans-zeatins and triggered higher production of hypersensitive inducing biomolecules. The 24 other HR co-related biological processes were demonstrated by high phytoalexins level and 25 high protease activities. Such activities ultimately inhibited the colonization of BIPOL on the 26 roots of maize seedlings. The products of the genes expressed at high GA 3 also conferred the 27 deterrence of BIPOL colonization at SD = OD 0.6 . Intriguingly, when we inhibited GA 3 28 biosynthesis in the seedlings with aerially sprayed uniconizole, prior to BIPOL treatment, the 29 BIPOL colonized and subsequently promoted the seedling growth. This low level of GA 3 30 after BIPOL treatment checked the high level of secondary metabolites and hypersensitivity 31 inducing molecules. The results, thus suggested that the aforementioned processes only 32 happened in the BIPOL at SD (OD 0.6 ), whereas the SD at lower levels (OD 0.2 or OD 0.4 ) 33 neither promoted the growth of uniconizole pre-treated seedlings nor produced HR in control 34 seedlings of maize plant.35

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Roles of Plant-Derived Secondary Metabolites during Interactions with Pathogenic and Beneficial Microbes under Conditions of Environmental Stress

Cited by 41 publications

References 67 publications

Antioxidant responses against aluminum metal stress in Geitlerinema amphibium

Antioxidant responses against aluminum metal stress in Geitlerinema amphibium

High-quality de novo assembly of the Eucommia ulmoides haploid genome provides new insights into evolution and rubber biosynthesis

Phytohormonal cross-talk modulate Bipolaris sorokiniana (Scc.)interaction with Zea mays

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