Journal ArticleDOI
Deciphering the Mechanisms of Endophyte-Mediated Biofortification of Fe and Zn in Wheat
Devendra Singh,Neelam Geat,Mahendra Vikram Singh Rajawat,Mahesh M. Mahajan,Radha Prasanna,Surender Singh,Rajeev Kaushik,Ram Nageena Singh,Kanika Kumar,Anil Kumar Saxena +9 more
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In this article, an investigation was carried out to understand the mechanism(s) underlying enhanced Fe or Zn uptake in low Fe-Zn accumulator wheat genotype 4HPYT-414, due to inoculation of siderophore-producing and zinc-solubilizing endophytes.Abstract:
An investigation was carried out to understand the mechanism(s) underlying enhanced Fe or Zn uptake in low Fe–Zn accumulator wheat genotype 4HPYT-414, due to inoculation of siderophore-producing and zinc-solubilizing endophytes—Arthrobacter sulfonivorans DS-68 and Arthrobacter sp DS-179 Root anatomical features, using transmission electron microscopy (TEM), qualitative and quantitative aspects of production of organic acids and sugars in root exudates, and expression of TaZIP genes were analysed to relate to endophyte-mediated higher concentrations of Fe and Zn in the roots and shoots of wheat plants TEM studies revealed that the endodermis, cortical region, root hair extension, xylem and xylem vessels, pericycle and vascular bundles were more pronounced and thicker in inoculated treatments, as compared to control The organic acid profile of root exudates revealed five types of organic acids, with citric acid being predominant Inoculation of A sulfonivorans and Arthrobacter sp brought about 5- and eightfold increases in the amounts of acids, respectively, as compared to control, particularly citric acid, succinic acid and acetic acid Among the four TaZIP genes targeted, expression was achieved only for TaZIP3 and TaZIP7 genes, which showed 1–2 fold increases in the inoculated treatments The results clearly indicated that the endophyte-mediated overexpression of TaZIP3 and TaZIP7 genes in roots and shoots, and the observed anatomical and exudate changes were acting synergistically in facilitating higher Fe and Zn translocation in roots and shootsread more
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Endophytic microbes: biodiversity, plant growth-promoting mechanisms and potential applications for agricultural sustainability
Kusam Lata Rana,Divjot Kour,Tanvir Kaur,Rubee Devi,Ajar Nath Yadav,Neelam Yadav,Harcharan Singh Dhaliwal,Anil Kumar Saxena +7 more
TL;DR: Endophytic microbes, their diversity in leguminous as well as non-leguminous crops, biotechnological applications, and ability to promote the growth of plant for agro-environmental sustainability are reviewed.
Journal ArticleDOI
Unlocking the potential of plant growth-promoting rhizobacteria on soil health and the sustainability of agricultural systems.
Zobia Khatoon,Suiliang Huang,Mazhar Rafique,Ali Fakhar,Muhammad Aqeel Kamran,Gustavo Santoyo +5 more
TL;DR: This work reviews recent literature concerning the diverse mechanisms of PGPR in maintaining healthy conditions of agricultural soils, thus reducing (or eliminating) the toxic agrochemicals dependence.
Journal ArticleDOI
Zinc solubilizing Bacillus strains that modulate growth, yield and zinc biofortification of soybean and wheat
TL;DR: Three types of strains are selected: yield enhancing strains, Zn-enriching strains and yield and zinc enrichment strain that could be utilized for improving seed yield and enrichment of zinc in seeds of soybean and wheat crops.
Journal ArticleDOI
Harnessing Bacterial Endophytes for Promotion of Plant Growth and Biotechnological Applications: An Overview
Ahmed M. Eid,Amr Fouda,Mohamed Ali Abdel-Rahman,Salem S. Salem,Albaraa Elsaied,Ralf Oelmüller,Mohamed Hijri,Arnab Bhowmik,Amr Elkelish,Amr Elkelish,Saad El-Din Hassan +10 more
TL;DR: In this article, the authors highlight the biotechnological possibilities for bacterial endophyte applications and propose future goals for their application and highlight the symbiotic relationship between plants and endophytes.
Journal ArticleDOI
Potential of microbes in the biofortification of Zn and Fe in dietary food grains. A review
Devendra Singh,Radha Prasanna +1 more
TL;DR: The major findings related to the mobilization of micronutrients by microorganisms highlighted the significance of acidification of rhizospheric soil and stimulation of secretion of phenolics, and novel inferences related to modifications in the root morphology and architecture were illustrated.
References
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Development of a DTPA soil test for zinc, iron, manganese and copper
Willard L. Lindsay,W. A. Norvell +1 more
TL;DR: A DTPA soil test was developed to identify near-neutral and calcareous soils with insufficient available Zn, Fe, Mn, or Cu for maximum yields of crops.
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Organic acids in the rhizosphere: a critical review
TL;DR: In this article, a review of the role of organic acids in rhizosphere processes is presented, which includes information on organic acid levels in plants (concentrations, compartmentalisation, spatial aspects, synthesis), plant efflux (passive versus active transport, theoretical versus experimental considerations), soil reactions (soil solution concentrations, sorption) and microbial considerations (mineralization).
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Soil beneficial bacteria and their role in plant growth promotion: a review
TL;DR: Free-living soil bacteria beneficial to plant growth, usually referred to as plant growth promoting rhizobacteria (PGPR), are capable of promoting plant growth by colonizing the plant root and can inhibit phytopathogens.
Journal ArticleDOI
A long way ahead: understanding and engineering plant metal accumulation.
TL;DR: Some plants can hyperaccumulate metal ions that are toxic to virtually all other organisms at low dosages, and this trait could be used to clean up metal-contaminated soils.
Journal ArticleDOI
Root structure and functioning for efficient acquisition of phosphorus: Matching morphological and physiological traits.
TL;DR: New discoveries of the development and functioning of root clusters in both monocotyledonous and dicotylingonous families are essential to produce new crops with superior P-acquisition traits.