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Alleviation of Salinity Induced Oxidative Stress in Chenopodium quinoa by Fe Biofortification and Biochar—Endophyte Interaction

1
Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad 38040, Pakistan
2
National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
3
Department of Health and Environment, Bioresource Unit, AIT Austrian Institute of Technology, GmbH, UFT, Konrad-Lorenz-Straße 24, 3430 Tulln, Austria
4
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
5
South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Sciences (CATAS), Zhanjiang 524091, China
*
Authors to whom correspondence should be addressed.
Agronomy 2020, 10(2), 168; https://doi.org/10.3390/agronomy10020168
Received: 29 October 2019 / Revised: 9 January 2020 / Accepted: 16 January 2020 / Published: 24 January 2020
(This article belongs to the Special Issue Role of Iron in Plant Nutrition, Growth and Metabolism)
Iron-biofortification is a sustainable food-based approach to combat iron deficiency by increasing iron content and bioavailability in agronomic crops. Siderophore producing microbes offer a sustainable and low-cost way to increase iron supply in crops. Also, certain substances released from organic amendments act as iron-chelators which increase the solubility as well as the availability of iron to plants. Present study investigated the role of siderophore-producing endophytic bacteria and biochar on iron-fortification of a novel crop quinoa in iron-limited saline conditions. The surface-disinfected seeds of quinoa were inoculated with Burkholderia phytofirmans PsJN (CFU = 109) and sown in saline soil (EC 20 dS m−1) amended with biochar (1% w/w). Results revealed that biochar and PsJN particularly when applied together significantly enhanced plant growth, grain yield, and grain nutrient contents of quinoa. Strikingly, iron concentration in quinoa grains was increased up to 71% by the combined application of biochar and PsJN. Moreover, plant physiological parameters were also improved significantly by the integrated application. However, enzymatic/non-enzymatic antioxidants activities were decreased by integrated treatment thus ameliorated salinity stress. Our study suggests that integrated application of siderophore-producing bacteria and biochar could be a promising, sustainable and cost-effective strategy which is easily integratable into the existing farming practices to achieve food fortification with micronutrients in developing countries. View Full-Text
Keywords: plant-microbe interaction; biofortification; salinity; biochar; quinoa; nutrient homeostasis plant-microbe interaction; biofortification; salinity; biochar; quinoa; nutrient homeostasis
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Naveed, M.; Ramzan, N.; Mustafa, A.; Samad, A.; Niamat, B.; Yaseen, M.; Ahmad, Z.; Hasanuzzaman, M.; Sun, N.; Shi, W.; Xu, M. Alleviation of Salinity Induced Oxidative Stress in Chenopodium quinoa by Fe Biofortification and Biochar—Endophyte Interaction. Agronomy 2020, 10, 168.

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