Inside the plant: addressing bacterial endophytes in biotic stress alleviation

Pandey, Pramod Kumar; Samanta, R.; Yadav, Rajkumar

doi:10.1007/s00203-019-01642-y

Cited by 28 publications

(18 citation statements)

References 150 publications

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“…Cellulolytic and several bioactive substances such as chaetoglobosin A, Chaetomium B, C, D, Q, R, T, chaetocin, chaetomin, chaetochalasin A, and chaetoviridins A and C was also produced by C. globosum (Ashwini 2019). Pandey et al (2019) reported that mechanisms that biotic fungi use are antifungal production, specialized antigenicity, and stimulation of plant immunity. It can also be attributed to the role of biotic fungi in analyzing organic and inorganic pollutants in the soil, reducing the toxicity of pollutants to plants, providing a good environment for plant growth and forming a physical barrier around plant roots that protect them from unfavorable environmental conditions and limit the invasion of pathogens and pests (Wu and Lin 2003).…”

Section: Resultsmentioning

confidence: 99%

The efficiency of some bioagent fungi in reduction of wheat seed decay and seedling damping-off disease with heavy metals interaction

2021

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Abstract. Madhi QH, Abass MH, Matrood AAA. 2021. The efficiency of some bioagent fungi in reduction of wheat seed decay and seedling damping-off disease with heavy metals interaction. Biodiversitas 22: 3984-3993. Biological control is an ecofriendly efficient measurement for disease control and heavy metals reduction in soils. The use of bioagent fungi such as Trichoderma koningii and Chaetomum globosum reduced the negative effect of pathogenic fungi that cause seed decay and the seedlings damping off wheat alone or by interaction with the concentrations of lead or cadmium, which increases the germination percentage of wheat seeds and reducing seedling damping off. It also reduced the severity index of wheat with pathogenic fungi and reduced the negative effect of interaction between heavy metals and pathogenic fungi on the severity index of the wheat. Results showed that T. koningii and C. globosum reduced the effect of the interaction of R. solani with 200 mg/kg lead to 57.7 and 55.4%, respectively and R. solani and cadmium 3 mg/kg with 60 and 61.6%, respectively. T. koningii and C. globosum also reduced the effect of the interaction F.solani with lead 200 mg/kg to 45.4 and 48.5%, respectively and F. solani and cadmium 3 mg/kg to 46.8 and 52.5% respectively. The bioagent fungi also increased the fresh and dry weight of shoot and root system, T. koningii significantly increased the fresh and dry weight of shoot in the presence of R. solani. The results also indicated that there was a high significant difference in the use of C. globosum in increasing the fresh and dry weight of shoot and root system. T. koningii and C. globosum significantly reduced the effect of interaction between the pathogenic fungi and low concentrations of lead and cadmium leading to an increase in the fresh and dry weight of shoot and root system. They also increased the plant height in the presence of pathogenic fungi as well as reducing the negative effect of the interaction between heavy metals and pathogenic fungi in the height of wheat plants. No significant interaction was observed between the low concentrations of lead and cadmium and pathogenic fungi in the presence of bioagent fungi. The results exhibited that bioagent fungi can reduce the negative effect of interaction of pathogenic fungi with lead and cadmium on the total phenols content of wheat leaves, and no significant difference was recorded in the treatment of low concentrations with the pathogenic fungi. Results showed that bioagent fungi can reduce the negative effect of the interaction of pathogenic fungi with lead and cadmium on the total phenols content of wheat plant leaves. No significant differences were recorded in the treatment of low concentrations with the pathogenic fungi in the presence of bioagent fungi. The two bioagent fungi increased the concentration of chlorophyll a and b, total chlorophyll and carotenoids reduced anthocyanin in leaves, and increased chlorophyll stability index compared to the control treatment.

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Section: Resultsmentioning

confidence: 99%

The efficiency of some bioagent fungi in reduction of wheat seed decay and seedling damping-off disease with heavy metals interaction

2021

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“…plants either individually or in combination. Endophyte-managed host resistance to pathogens also includes niche competition by the production of defensive metabolites such as antibiotics, antimicrobial, and structural compounds, as well as the induction of immunity or systemic resistance in the host plant [ 150 ].…”

Section: Applications Of Bacterial Endophytesmentioning

confidence: 99%

Harnessing Bacterial Endophytes for Promotion of Plant Growth and Biotechnological Applications: An Overview

Eid

Fouda

Abdel-Rahman

et al. 2021

Plants

139

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Endophytic bacteria colonize plants and live inside them for part of or throughout their life without causing any harm or disease to their hosts. The symbiotic relationship improves the physiology, fitness, and metabolite profile of the plants, while the plants provide food and shelter for the bacteria. The bacteria-induced alterations of the plants offer many possibilities for biotechnological, medicinal, and agricultural applications. The endophytes promote plant growth and fitness through the production of phytohormones or biofertilizers, or by alleviating abiotic and biotic stress tolerance. Strengthening of the plant immune system and suppression of disease are associated with the production of novel antibiotics, secondary metabolites, siderophores, and fertilizers such as nitrogenous or other industrially interesting chemical compounds. Endophytic bacteria can be used for phytoremediation of environmental pollutants or the control of fungal diseases by the production of lytic enzymes such as chitinases and cellulases, and their huge host range allows a broad spectrum of applications to agriculturally and pharmaceutically interesting plant species. More recently, endophytic bacteria have also been used to produce nanoparticles for medical and industrial applications. This review highlights the biotechnological possibilities for bacterial endophyte applications and proposes future goals for their application.

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“…The bacterial plant microbiome is important for plant growth and health, increasing nutrient acquisition (Knoth et al, 2014;Pankievicz et al, 2015;Alori et al, 2017;Chhabra and Dowling, 2017), improving abiotic stress tolerances (Cura et al, 2017;Lata et al, 2018;Zhang et al, 2019), protecting against pathogens (Bulgarelli et al, 2013;Pandey et al, 2019), modulating plant hormones (Santoyo et al, 2016;Ali et al, 2017), and detoxifying environmental pollutants (Afzal et al, 2014;Hussain et al, 2018). There is a strong and steadily increasing interest in microbial endophytes of plants (Rho et al, 2017) and how they could be harnessed to improve sustainability in agriculture, forestry and bioenergy production (Busby et al, 2017;Doty, 2017).…”

Section: Introductionmentioning

confidence: 99%

Influences of Climate on Phyllosphere Endophytic Bacterial Communities of Wild Poplar

et al. 2020

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Plant-associated microbial communities play a central role in the plant response to biotic and abiotic stimuli, improving plant fitness under challenging growing conditions. Many studies have focused on the characterization of changes in abundance and composition of root-associated microbial communities as a consequence of the plant response to abiotic factors such as altered soil nutrients and drought. However, changes in composition in response to abiotic factors are still poorly understood concerning the endophytic community associated to the phyllosphere, the above-ground plant tissues. In the present study, we applied high-throughput 16S rDNA gene sequencing of the phyllosphere endophytic bacterial communities colonizing wild Populus trichocarpa (black cottonwood) plants growing in native, nutrient-limited environments characterized by hot-dry (xeric) riparian zones (Yakima River, WA), riparian zones with mid hot-dry (Tieton and Teanaway Rivers, WA) and moist (mesic) climates (Snoqualmie, Skykomish and Skagit Rivers, WA). From sequencing data, 587 Amplicon Sequence Variants (ASV) were identified. Surprisingly, our data show that a core microbiome could be found in phyllosphere-associated endophytic communities in trees growing on opposite sides of the Cascades Mountain Range. Considering only taxa appearing in at least 90% of all samples within each climatic zone, the core microbiome was dominated only by two ASVs affiliated Pseudomonadaceae and two ASVs of the Enterobacteriaceae family. Alpha-diversity measures indicated that plants colonizing hot-dry environments showed a lower diversity than those from mid hot-dry and moist climates. Beta-diversity measures showed that bacterial composition was significantly different across sampling sites. Accordingly, we found that specific ASV affiliated to Pseudomonadaceae and Enterobacteriaceae were significantly more abundant in the phyllosphere endophytic community colonizing plants adapted to the xeric environment. In summary, this study highlights that sampling site is the major driver of variation and that only a few ASV showed a distribution that significantly correlated to climate variables.

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Inside the plant: addressing bacterial endophytes in biotic stress alleviation

Cited by 28 publications

References 150 publications

The efficiency of some bioagent fungi in reduction of wheat seed decay and seedling damping-off disease with heavy metals interaction

The efficiency of some bioagent fungi in reduction of wheat seed decay and seedling damping-off disease with heavy metals interaction

Harnessing Bacterial Endophytes for Promotion of Plant Growth and Biotechnological Applications: An Overview

Influences of Climate on Phyllosphere Endophytic Bacterial Communities of Wild Poplar

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