Effects of the endophyte Epichloë festucae var. lolii of perennial ryegrass (Lolium perenne) on indicators of oxidative stress from pathogenic fungi during seed germination and seedling growth

Ma, Minzhi; Christensen, Michael J.; Zhang, Nan

doi:10.1007/s10658-014-0563-x

Cited by 58 publications

(33 citation statements)

References 53 publications

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“…Values marked with different lowercase letters differ significantly at P < 0.05DiscussionIn terms of the disease resistance of the endophyte influence on the host, the beneficial effect of endophyte infection have been reported in perennial ryegrass, tall fescue and native grasses(Gwinn and Gavin 1992;Bonos et al 2005;Tian et al 2008;Ma et al 2015)…”

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confidence: 99%

Pathogen resistant advantage of endophyte-infected over endophyte-free Leymus chinensis is strengthened by pre-drought treatment

et al. 2015

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Symbiotic relationships with beneficial microbes often increase the resistance of the host grass to abiotic and biotic stresses. In this study, the resistance of endophyte-infected (E+) and endophyte-free (E-) Leymus chinensis to two species of pathogen fungi, Curvularia lunata and Bipolaris sorokiniana, were compared under normal water and pre-drought treatments. The results showed that endophyte infection significantly reduced leaf lesion area of the host grass on one hand, and on the other hand the maximum quantum efficiency of PSII (Fv/Fm) of E+ plants was higher than E-plants, and these advantages of E+ over E-plants were strengthened by pre-drought stress. Predrought treatment led to significantly higher salicylic acid (SA) and lignin accumulation in E+ plants in comparison with E-when exposed to both C. lunata and B. sorokiniana. Additionally, glutamine and phenylalanine concentrations were significantly affected by the interaction between endophyte infection and pathogen inoculation. Overall, endophytes could enhance the pathogen resistance of host by activating a rapid defense reaction of the plant, and this advantage of E+ over Eplants could be strengthened by pre-drought treatment.

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confidence: 99%

Pathogen resistant advantage of endophyte-infected over endophyte-free Leymus chinensis is strengthened by pre-drought treatment

et al. 2015

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“…Exposure towards biotic stress caused progressive senescence that leads to the MDA accumulation which is an end product of lipid peroxidation (Ma et al . ). Functional damage of leaves occurred due to pathogenic stress can decrease leaf chlorophyll content (Deak et al .…”

Section: Discussionmentioning

confidence: 97%

“…Furthermore, we also observed a significant reduction in the content of a stress level indicator known as MDA in bacterially inoculated plants as compared to control plants. Exposure towards biotic stress caused progressive senescence that leads to the MDA accumulation which is an end product of lipid peroxidation (Ma et al 2014). Functional damage of leaves occurred due to pathogenic stress can decrease leaf chlorophyll content (Deak et al 1999) and less detrimental, so the loss of leaf pigments was reduced (Deak et al 1999).…”

Section: Discussionmentioning

confidence: 99%

ACC deaminase-containing plant growth-promoting rhizobacteria protect Papaver somniferum from downy mildew

et al. 2017

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“…Copper stress causes the accumulation of large amounts of reactive oxygen species in cells [ 11 , 12 ]. Generally, it is believed that cells activate and increase the levels of antioxidant enzymes such as CAT, POD, and SOD and reduce that of glutathione (GSH) to alleviate oxidative stress [ 13 ]. GST is a key enzyme that catalyzes the binding of glutathione and metal ions and plays an important role during the binding of glutathione to copper ions [ 14 ].…”

Section: Discussionmentioning

confidence: 99%

Functions of the C2H2 Transcription Factor Gene thmea1 inTrichoderma harzianumunder Copper Stress Based on Transcriptome Analysis

Mei

Wang

Jiang

et al. 2018

BioMed Research International

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Trichoderma spp. are important biocontrol filamentous fungi and have tremendous potential in soil bioremediation. In our previous studies, a C2H2 type transcription factor coding gene (thmea1) was cloned from a biocontrol agent T. harzianum Th-33; the encoded sequence of thmea1 contained 3 conserved C2H2 domains with Swi5 and Ace2 in Saccharomyces cerevisiae. The thmea1 knockout mutant Δthmea1 showed 12.9% higher copper tolerance than the wild-type Th33. To elucidate the function of thmea1 and its relationship with copper stress response, we conducted transcriptome sequencing and analysis of wild-type Th33 and Δthmea1 under 0.8 mM copper stress. A total of 1061 differentially expressed genes (DEGs) were identified between the two strains, all DEGs were assigned to KEGG pathway database, 383 DEGs were annotated in 191 individual pathways, and the categories of ribosomal protein synthesis and amino acid metabolism were the most highly enriched ones. Analysis of related DEGs showed that the expression levels of intracellular glutathione detoxification enzyme, heat shock proteins, and ribosomal proteins in Δthmea1 were higher than that of the wild-type Th33, and the expression of metallothionein (MT) gene did not change. In addition, the expression levels of genes coding for proteins associated with the Ccc2p-mediated copper chaperone Atx1p transport of copper ions into the Golgi secretory pathway increased, as well as the copper amine oxidase (CuAO). These findings suggest that Thmea1 is a negative regulated factor of copper tolerance ability in T. harzianum. It does not show metallothionein expression activator activities as that of Ace2 in S. cerevisiae. We hypothesize that after T. harzianum has lost its thmea1 gene, the ability of cells to scavenge reactive oxygen species, mainly through the glutathione antioxidant system, is enhanced, whereas protein synthesis and repair and copper secretion increase under copper stress, which increases the ability of the mutant strain to tolerate copper stress.

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Effects of the endophyte Epichloë festucae var. lolii of perennial ryegrass (Lolium perenne) on indicators of oxidative stress from pathogenic fungi during seed germination and seedling growth

Cited by 58 publications

References 53 publications

Pathogen resistant advantage of endophyte-infected over endophyte-free Leymus chinensis is strengthened by pre-drought treatment

Pathogen resistant advantage of endophyte-infected over endophyte-free Leymus chinensis is strengthened by pre-drought treatment

ACC deaminase-containing plant growth-promoting rhizobacteria protect Papaver somniferum from downy mildew

Functions of the C2H2 Transcription Factor Gene thmea1 inTrichoderma harzianumunder Copper Stress Based on Transcriptome Analysis

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