The Interaction between Arbuscular Mycorrhizal Fungi and Endophytic Bacteria Enhances Plant Growth of Acacia gerrardii under Salt Stress

Hashem, Abeer; Al-Huqail, Asma A.; Wirth, Stephan; Egamberdieva, Dilfuza

doi:10.3389/fmicb.2016.01089

Cited by 245 publications

(152 citation statements)

References 77 publications

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“…AMF have been reported to assist various plants in assimilating mineral elements especially phosphorus (P) [39,40,41,42,43]. In this study, AMF enhanced the uptake of P, Mg, Ca, and S in the plant roots (Table 3), enhanced the uptake of P and Mg in the plant shoots (Table 4), and reduced the uptake of Si in both the plant roots and shoots.…”

Section: Discussionmentioning

confidence: 70%

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Awoyemi¹,

Adeleke²

2017

WJAR

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Potentially toxic concentrations of certain mineral elements may be taken up in plant biomass produced on coal fly ash (CFA) contaminated soil. This raises concerns about efficiencies of downstream processes, such as hydrolysis and fermentation involved in biomass conversions to bioethanol. A greenhouse pot experiment was conducted to assess bioethanol yield from switchgrass biomass produced on CFA-amended soil (0, 7.5 and 15 %, w/w CFA/soil). Separate aliquots of the CFA-amended soils were either inoculated with isolate of arbuscular mycorrhizal fungi (AMF), Rhizophagus clarus, or fortified with reduced glutathione (GSH). Mineral elements in the CFA-amended soils and plant tissues were determined using ICP-OES. Shoot samples of harvested biomass were subjected to microwave-assisted acid pretreatment, enzymatic hydrolysis and fermentation. The reducing sugar (glucose) and bioethanol in the biomass hydrolysate were determined by spectrophotometry. Results showed that CFA had a concentration-dependent increase on the levels of the mineral elements in soils that were amended. Subsequent uptake of the mineral elements in switchgrass tissues was modulated by CFA-soil amendment, AMF inoculation, and GSH fortification. The glucose concentrations in biomasss hyzrolysate of switchgrass grown on 7.5 and 15% CFA-amended soils were significantly higher (p < 0.05) than the unamended (control) soil without significant adverse effect on the bioethanol yield. The bioethanol concentration (µg/mg DW) in the fermented hydrolysate of switchgrass grown on 15% CFA-amended soil (26.63) was higher than the control soil (24.46). Likewise, AMF and GSH enhanced bioethanol yield from hydrolysate of switchgrass biomass grown on the CFA-amended soil. Our results indicated that coupling CFA-amended soil with either AMF or GSH can enhance bioethanol yield.

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Section: Discussionmentioning

confidence: 70%

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Awoyemi¹,

Adeleke²

2017

WJAR

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“…So, fungi have potential for preventing plant diseases and for improving plant productivity [78]. Similarly, plant pathogenic bacteria provoke many plant diseases while endophytic bacteria improve plant tolerance to several abiotic stresses and can protect plants from pathogenic microbes [79,80]. On the other hand, "Hexapoda" is one of four major groups included in the Phylum Artropoda, and is formed by more than one million insect species, of which a high number are herbivores.…”

Section: Analysis Of Abstractmentioning

confidence: 99%

Worldwide Research on Plant Defense against Biotic Stresses as Improvement for Sustainable Agriculture

2018

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Agriculture is the basis for food production on a global scale. Sustainable agriculture tries to improve or maintain the quality of food without compromising the environment. As sessile organisms, plants cannot avoid adverse environmental conditions and contact with other living organisms. The damage caused to plants by other living organisms such as parasites and pathogens (virus, bacteria, fungi, nematodes or insects) brings about what is known as biotic stress. Plants are constantly exposed to biotic stress, which causes changes in plant metabolism involving physiological damages that lead to a reduction of their productivity. To fight biotic stress, plants have developed sophisticated defense mechanisms. Thus, understanding plant defense mechanisms might prevent important crop and economic losses. In this article, a bibliometric analysis of biotic stress is carried out. Different aspects of the publications are analyzed, such as publication type, research field, journal type, countries and their institutions, as well as the keyword occurrence frequency, and finally special attention is paid to the plant studied by the leading countries and institutions. As expected, journals selected by authors to publish their relevant findings are plant-specific journals. However, it should be noted that the fourth position, in terms of the number of publications per journal, is occupied by BMC Genomics journal. Such a journal considers mainly articles on genomics, which indicates the involvement of genetic factors in the control of biotic stress. Analysis of the keywords used in publications about biotic stress shows the great interest in the biotic-abiotic stress interaction, in the gene expression regulation in plants as well as phytohormones in the current research. In short, the great effort made by the scientific community in the biotic and abiotic stresses field with the aim to understand, regulate and control plant damages caused by biotic stress agents will help in the development of sustainable agriculture.

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“…Previous reports from Saudi Arabia have described the symbiosis between AMF and some acacia species. Their objective was essential to check the presence of AMF and their potential role in phytoremediation of heavy metals and salt stress tolerance of plants . However, studies on AMF communities of acacia species are very scarce and AMF identification is limited to spore morphology .…”

Section: Introductionmentioning

confidence: 99%

Diversity of arbuscular mycorrhizal fungi associated with acacia trees in southwestern Saudi Arabia

et al. 2019

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Acacia species produce extensive, deep root systems with a capacity to develop mycorrhizal symbioses that facilitate plant nutrition via enhanced soil nutrient absorption. This study aimed to evaluate the mycorrhizal status and the diversity of arbuscular mycorrhizal fungi (AMF) associated with acacia trees in southwestern Saudi Arabia. The mycorrhizal status varied greatly between species. The highest values of AMF root colonization and spore density were observed in the roots and in the rhizospheric soil of Acacia negrii. DNA was extracted from plant roots and the AMF large subunit ribosomal DNA (LSU rDNA) was amplified by a nested polymerase chain reaction. A total of 274 LSU rDNA cloned fragments from roots of the three acacia trees were sequenced. Phylogenetic analysis revealed a high AMF diversity, especially in Acacia tortilis. On the basis of LSU rDNA sequences, AMF was grouped into five genera: Glomus, Claroideoglomus, Acaulospora, Gigaspora, and Scutellospora. The genus Glomus fungi were the dominant colonizers of all three acacia species, while the genus Scutellospora fungi were found only in A. tortilis roots. The high AMF‐acacia diversity suggests that AMF plays an important role in the sustainability of acacia species in the arid environment.

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The Interaction between Arbuscular Mycorrhizal Fungi and Endophytic Bacteria Enhances Plant Growth of Acacia gerrardii under Salt Stress

Cited by 245 publications

References 77 publications

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Worldwide Research on Plant Defense against Biotic Stresses as Improvement for Sustainable Agriculture

Diversity of arbuscular mycorrhizal fungi associated with acacia trees in southwestern Saudi Arabia

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