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Bian Q, Cheng K, Chen L, Jiang Y, Li D, Xie Z, Wang X, Sun B. Organic amendments increased Chinese milk vetch symbiotic nitrogen fixation by enriching Mesorhizobium in rhizosphere. ENVIRONMENTAL RESEARCH 2024; 252:118923. [PMID: 38636641 DOI: 10.1016/j.envres.2024.118923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/01/2024] [Accepted: 04/10/2024] [Indexed: 04/20/2024]
Abstract
Symbiotic nitrogen fixation of Chinese milk vetch (Astragalus sinicus L.) can fix nitrogen from the atmosphere and serve as an organic nitrogen source in agricultural ecosystems. Exogenous organic material application is a common practice of affecting symbiotic nitrogen fixation; however, the results of the regulation activities remain under discussion. Studies on the impact of organic amendments on symbiotic nitrogen fixation have focused on dissolved organic carbon content changes, whereas the impact on dissolved organic carbon composition and the underlying mechanism remain unclear. In situ pot experiments were carried out using soils from a 40-year-old field experiment platform to investigate symbiotic nitrogen fixation rate trends, dissolved organic carbon concentration and component, and diazotroph community structure in roots and in rhizosphere soils following long-term application of different exogenous organic substrates, i.e., green manure, green manure and pig manure, and green manure and rice straw. Remarkable increases in rate were observed in and when compared with that in green manure treatment, with the greatest enhancement observed in the treatment. Moreover, organic amendments, particularly pig manure application, altered diazotroph community composition in rhizosphere soils, therefore increasing the abundance of the host-specific genus Mesorhizobium. Furthermore, organic amendments influence the diazotroph communities through two primary mechanisms. Firstly, the components of dissolved organic carbon promote an increase in available iron, facilitated by the presence of humus substrates. Secondly, the elevated content of dissolved organic carbon and available iron expands the niche breadth of Mesorhizobium within the rhizosphere. Consequently, these alterations result in a modified diazotroph community within the rhizosphere, which in turn influences Mesorhizobium nodulation in the root and symbiotic nitrogen fixation rate. The results of the present study enhance our understanding of the impact of organic amendments on symbiotic nitrogen fixation and the underlying mechanism, highlighting the key role of dissolved organic carbon composition on diazotroph community composition in the rhizosphere.
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Affiliation(s)
- Qing Bian
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Kun Cheng
- Institute of Red Soil and Germplasm Resources, Jinxian, 331717, China
| | - Ling Chen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Yuji Jiang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Daming Li
- Institute of Red Soil and Germplasm Resources, Jinxian, 331717, China.
| | - Zubin Xie
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Xiaoyue Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Bo Sun
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
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Chae HG, Margenot AJ, Jeon JR, Kim MS, Jang KS, Yoon HY, Kim PJ, Lee JG. Linking the humification of organic amendments with size aggregate distribution: Insights into molecular composition using FT-ICR-MS. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172147. [PMID: 38569966 DOI: 10.1016/j.scitotenv.2024.172147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/24/2024] [Accepted: 03/30/2024] [Indexed: 04/05/2024]
Abstract
Soil organic matter (SOM) plays a pivotal role in enhancing physical and biological characteristics of soil. Humic substances constitute a substantial proportion of SOM and their increase can improve crop yields and promote agricultural sustainability. While previous research has primarily assessed the influence that humic acids (HAs) derived from natural water have on soil structure, our study focuses on the impact of HAs on soil aggregation under different fertilizer regimes. During the summer cropping season, maize was cultivated under organic and synthetic fertilizer treatments. The organic fertilizer treatment utilized barley (Hordeum vulgare L.) and hairy vetch (Vicia villosa R.) as an organic amendment five days prior to maize planting. The synthetic treatment included a synthetic fertilizer (NPK) applied at South Korea's recommended rates. The organic treatment resulted in significant improvements in the soil aggregates and stability (mean weight diameter, MWD; p < 0.05) compared to the synthetic fertilizer application. These improvements could be primarily attributed to the increased quantity and quality of HAs in the soil derived from the organic amendment. The amount of extracted HAs in the organic treatment was nearly twice that of the synthetic treatment. Additionally, the organic treatment had a 140 % larger MWD and a 40 % increase in total phenolic content compared to the synthetic treatment. The organic treatment also had an increased macronutrient uptake (p < 0.001), an 11 % increase in aboveground maize biomass, and a 21 % increase in grain yield relative to the synthetic treatment. Thus, the enhancement of HA properties through the incorporation of fresh organic manure can both directly and indirectly increase crop productivity.
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Affiliation(s)
- Ho Gyeong Chae
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Andrew J Margenot
- Department of Crop Sciences, University of Illinois Urbana-Champaign, 1102 S. Goodwin Avenue, Urbana, IL 61801, USA; Agroecosystem Sustainability Center, Institute for Sustainability, Energy and Environment, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Avenue, Urbana, IL 61801, USA
| | - Jong-Rok Jeon
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea; Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Min Sung Kim
- Digital Omics Research Center, Korea Basic Science Institute, Cheongju 28119, South Korea
| | - Kyoung-Soon Jang
- Digital Omics Research Center, Korea Basic Science Institute, Cheongju 28119, South Korea
| | - Ho Young Yoon
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Pil Joo Kim
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea; Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jeong Gu Lee
- Department of Crop Sciences, University of Illinois Urbana-Champaign, 1102 S. Goodwin Avenue, Urbana, IL 61801, USA; Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea.
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Elshamly AMS, Nassar SMA. Impacts of cobalt and zinc on improving peanuts nutrient uptake, yield and irrigation water use efficiency under different irrigation levels. Sci Rep 2024; 14:7188. [PMID: 38531917 DOI: 10.1038/s41598-024-56898-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 03/12/2024] [Indexed: 03/28/2024] Open
Abstract
The knowledge of proper fertigation across various irrigation levels is necessary for maximizing peanut yield and irrigation use efficiency in arid areas, and it also can effectively alleviate the risk of nutrient deficiency induced by water stress. This study evaluated the effectiveness of cobalt combined with two zinc application methods on peanut nutrient uptake, yield, and irrigation water use efficiency across varying irrigation levels. A split-split plot experiment was carried out in 2021 and 2022. Three peanut gross water requirement (GWR) levels (100%, 80%, and 60%) were designated for main plots. Subplots featured plants treated with either 0 or 7.5 mg L-1 of cobalt. The sub-sub plots assessed chelated zinc effects at rates of 0 and 2 g L-1 via foliar and soil applications. In comparison to the control (100% GWR), nutrient uptake decreased, with sodium being the exception, and there was an increase in soil pH at 60% GWR. The results showed also significant reductions in yield and water use by approximately 60.3% and 38.1%, respectively. At this irrigation level, applying zinc via soil, either alone or combined with cobalt, led to significant yield increases of 89.7% and 191.3% relative to the control. Also, it's crucial to note that cobalt application negatively affected iron and copper at 60% GWR, but this impact was lessened with soil-applied zinc. Hence, under a similar circumstance, treating stressed peanut plants with additional foliar applications of iron + copper and applying zinc via soil, could enhance nutrient uptake and improve yield. On the other hand, at 80% GWR, a combination of foliar-applied zinc and cobalt, had a tremendous impact on the absorption of (nitrogen, phosphorus, magnesium, and zinc), resulting in enhanced agronomic traits and decreased water losses. Additionally, at this irrigation level, foliar zinc application alone yielded a 32.4% increase compared to the 80% GWR control. When combined with cobalt, there was a 70.0% surge in water use. Based on this knowledge, the study suggests using 80% GWR and treating peanut plants with a combination of foliar-applied zinc and cobalt. This strategy aids plants in countering the adverse effects of water stress, ultimately leading to enhanced yield and irrigation water use efficiency.
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Affiliation(s)
- Ayman M S Elshamly
- Water Studies and Research Complex, National Water Research Center, Cairo, Egypt.
| | - Saad M A Nassar
- Department of Genetic Resources, Desert Research Center, El-Matareya, Cairo, Egypt
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Jiang Y, Yue Y, Wang Z, Lu C, Yin Z, Li Y, Ding X. Plant Biostimulant as an Environmentally Friendly Alternative to Modern Agriculture. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:5107-5121. [PMID: 38428019 DOI: 10.1021/acs.jafc.3c09074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
Ensuring the safety of crop production presents a significant challenge to humanity. Pesticides and fertilizers are commonly used to eliminate external interference and provide nutrients, enabling crops to sustain growth and defense. However, the addition of chemical substances does not meet the environmental standards required for agricultural production. Recently, natural sources such as biostimulants have been found to help plants with growth and defense. The development of biostimulants provides new solutions for agricultural product safety and has become a widely utilized tool in agricultural. The review summarizes the classification of biostimulants, including humic-based biostimulant, protein-based biostimulant, oligosaccharide-based biostimulant, metabolites-based biostimulants, inorganic substance, and microbial inoculant. This review attempts to summarize suitable alternative technology that can address the problems and analyze the current state of biostimulants, summarizes the research mechanisms, and anticipates future technological developments and market trends, which provides comprehensive information for researchers to develop biostimulants.
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Affiliation(s)
- Yanke Jiang
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai an, Shandong 271018, China
| | - Yingzhe Yue
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai an, Shandong 271018, China
| | - Zhaoxu Wang
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai an, Shandong 271018, China
| | - Chongchong Lu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai an, Shandong 271018, China
| | - Ziyi Yin
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai an, Shandong 271018, China
| | - Yang Li
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai an, Shandong 271018, China
| | - Xinhua Ding
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai an, Shandong 271018, China
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Rathor P, Upadhyay P, Ullah A, Gorim LY, Thilakarathna MS. Humic acid improves wheat growth by modulating auxin and cytokinin biosynthesis pathways. AOB PLANTS 2024; 16:plae018. [PMID: 38601216 PMCID: PMC11005776 DOI: 10.1093/aobpla/plae018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 03/22/2024] [Indexed: 04/12/2024]
Abstract
Humic acids have been widely used for centuries to enhance plant growth and productivity. The beneficial effects of humic acids have been attributed to different functional groups and phytohormone-like compounds enclosed in macrostructure. However, the mechanisms underlying the plant growth-promoting effects of humic acids are only partially understood. We hypothesize that the bio-stimulatory effect of humic acids is mainly due to the modulation of innate pathways of auxin and cytokinin biosynthesis in treated plants. A physiological investigation along with molecular characterization was carried out to understand the mechanism of bio-stimulatory effects of humic acid. A gene expression analysis was performed for the genes involved in auxin and cytokinin biosynthesis pathways in wheat seedlings. Furthermore, Arabidopsis thaliana transgenic lines generated by fusing the auxin-responsive DR5 and cytokinin-responsive ARR5 promoter to ß-glucuronidase (GUS) reporter were used to study the GUS expression analysis in humic acid treated seedlings. This study demonstrates that humic acid treatment improved the shoot and root growth of wheat seedlings. The expression of several genes involved in auxin (Tryptophan Aminotransferase of Arabidopsis and Gretchen Hagen 3.2) and cytokinin (Lonely Guy3) biosynthesis pathways were up-regulated in humic acid-treated seedlings compared to the control. Furthermore, GUS expression analysis showed that bioactive compounds of humic acid stimulate endogenous auxin and cytokinin-like activities. This study is the first report in which using ARR5:GUS lines we demonstrate the biostimulants activity of humic acid.
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Affiliation(s)
- Pramod Rathor
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Punita Upadhyay
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Aman Ullah
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Linda Yuya Gorim
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Malinda S Thilakarathna
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
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Elshamly AMS, Parrey ZA, Gaafar ARZ, Siddiqui MH, Hussain S. Potassium humate and cobalt enhance peanut tolerance to water stress through regulation of proline, antioxidants, and maintenance of nutrient homeostasis. Sci Rep 2024; 14:1625. [PMID: 38238388 PMCID: PMC10796332 DOI: 10.1038/s41598-023-50714-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 12/23/2023] [Indexed: 01/22/2024] Open
Abstract
Water stress is an important factor that substantially impacts crop production. As a result, there is a need for various strategies that can mitigate these negative effects. One such strategy is the application of potassium humate (Kh) and cobalt (Co), which have been reported to enhance the resistance of crop plants. Therefore, the present experiment was designed to investigate whether the application of Kh and Co could positively affect proline, chlorophyll and mineral elements contents, and antioxidant defense systems which in turn will mitigate the negative impact of water stress under different irrigation strategies. In 2021 and 2022, an open-field experiments were conducted by using a split-plot design. The main plots were divided to represent different irrigation strategies (ST), with additional control of full irrigation requirements (ST1). Four STs were implemented, with ST1, followed by the application of 75%, 50%, and 25% irrigation strategies in ST2, ST3, and ST4 respectively, in the next irrigation, followed by the full requirements, and so on. In the subplots, peanut plants were treated with tap water (Control), Kh at 2 g l-1 and 3 g l-1, Co, Co + Kh 2 g l-1 and Co + Kh 3 g l-1. The yield was negatively affected by the implementation of ST4, despite the increase in proline contents. Furthermore, there was a decrease in relative water content, chlorophyll content, antioxidant enzymes, protein, and mineral nutrient elements. However, the application of Kh or Co showed better improvements in most of the studied parameters. It is worth noting that there was an antagonistic relationship between Co and iron/manganese, and the intensity of this relationship was found to depend on the STs implemented. The highest mineral nutrient accumulation, chlorophyll content, relative water content, protein content, oil content, seed yield, and water productivity were observed when peanut plants were treated with Kh 3 g l-1 + Co under the ST2 water strategy.
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Affiliation(s)
- Ayman M S Elshamly
- Water Studies and Research Complex, National Water Research Centre, Cairo, Egypt.
| | - Zubair Ahmad Parrey
- Plant Physiology and Biochemistry Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Abdel-Rhman Z Gaafar
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Manzer H Siddiqui
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Sadam Hussain
- College of Agronomy, Key Laboratory of Crop Physio-Ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, China
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Wang R, Li D, Deng F, Cao Z, Zheng G. Production of artificial humic acid from rice straw for fertilizer production and soil improvement. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167548. [PMID: 37802338 DOI: 10.1016/j.scitotenv.2023.167548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 09/12/2023] [Accepted: 09/30/2023] [Indexed: 10/08/2023]
Abstract
In this study, artificial humic acid (AHA) was produced from rice straw at room temperature. The response surface methodology was used to investigate the response of artificial humic acid to time, liquid-solid ratio, and KOH concentration. The optimal reaction conditions were determined: reaction time of 2 h, liquid-solid ratio of 6, and KOH concentration of 1.5 mol/L. The artificial humic acid content under these conditions was 32.29 g/L, which satisfied the Chinese agricultural industry standard for water-soluble humic acid fertilizers (humic acid content ≥30 g/L). Compared with chemical fertilizers, artificial humic acid fertilizer promoted chard growth and increased soil organic matter and humic acid. The stability of artificial humic acid was better, with a retention rate of 60.47 % in the soil. Water-soluble humic acid fertilizer also promoted chard growth by increasing the relative abundance of growth-promoting bacteria such as Glutamicibacter and Pseudomonas and, as well as growth-promoting fungi such as Mortierella. The application of water-soluble humic acid fertilizers has implications for both soil improvement and the reduction of agricultural carbon emissions.
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Affiliation(s)
- Ruxian Wang
- College of Engineering, Northeast Agricultural University, Harbin 150030, China; CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Dong Li
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fang Deng
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Zhenglei Cao
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guoxiang Zheng
- College of Engineering, Northeast Agricultural University, Harbin 150030, China.
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Liu Q, Kawai T, Inukai Y, Aoki D, Feng Z, Xiao Y, Fukushima K, Lin X, Shi W, Busch W, Matsushita Y, Li B. A lignin-derived material improves plant nutrient bioavailability and growth through its metal chelating capacity. Nat Commun 2023; 14:4866. [PMID: 37567879 PMCID: PMC10421960 DOI: 10.1038/s41467-023-40497-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
The lignocellulosic biorefinery industry can be an important contributor to achieving global carbon net zero goals. However, low valorization of the waste lignin severely limits the sustainability of biorefineries. Using a hydrothermal reaction, we have converted sulfuric acid lignin (SAL) into a water-soluble hydrothermal SAL (HSAL). Here, we show the improvement of HSAL on plant nutrient bioavailability and growth through its metal chelating capacity. We characterize HSAL's high ratio of phenolic hydroxyl groups to methoxy groups and its capacity to chelate metal ions. Application of HSAL significantly promotes root length and plant growth of both monocot and dicot plant species due to improving nutrient bioavailability. The HSAL-mediated increase in iron bioavailability is comparable to the well-known metal chelator ethylenediaminetetraacetic acid. Therefore, HSAL promises to be a sustainable nutrient chelator to provide an attractive avenue for sustainable utilization of the waste lignin from the biorefinery industry.
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Affiliation(s)
- Qiang Liu
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, Zhejiang, China
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Tsubasa Kawai
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Yoshiaki Inukai
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya, Japan
| | - Dan Aoki
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Zhihang Feng
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yihui Xiao
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, Zhejiang, China
| | - Kazuhiko Fukushima
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Xianyong Lin
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, Zhejiang, China
| | - Weiming Shi
- International Research Centre for Environmental Membrane Biology, Department of Horticulture, Foshan University, Foshan, China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Wolfgang Busch
- Plant Molecular and Cellular Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Yasuyuki Matsushita
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan.
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu-shi, Tokyo, Japan.
| | - Baohai Li
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, Zhejiang, China.
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Fuentes M, Bosch G, de Hita D, Olaetxea M, Erro J, Zamarreño AM, Garcia-Mina JM. Supramolecular Arrangement of Lignosulfonate-Based Iron Heteromolecular Complexes and Consequences of Their Interaction with Ca 2+ at Alkaline pH and Fe Plant Root Uptake Mechanisms. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:11404-11417. [PMID: 37462422 PMCID: PMC10401718 DOI: 10.1021/acs.jafc.3c03474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Previous studies have shown that natural heteromolecular complexes might be an alternative to synthetic chelates to correct iron (Fe) deficiency. To investigate the mechanism of action of these complexes, we have studied their interaction with Ca2+ at alkaline pH, Fe-binding stability, Fe-root uptake in cucumber, and chemical structure using molecular modeling. The results show that a heteromolecular Fe complex including citric acid and lignosulfonate as binding ligands (Ls-Cit) forms a supramolecular system in solution with iron citrate interacting with the hydrophobic inner core of the lignosulfonate system. These structural features are associated with high stability against Ca2+ at basic pH. Likewise, unlike Fe-EDDHA, root Fe uptake from Ls-Cit implies the activation of the main root responses under Fe deficiency at the transcriptional level but not at the post-transcriptional level. These results are consistent with the involvement of some plant responses to Fe deficiency in the plant assimilation of complexed Fe in Ls-Cit under field conditions.
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Affiliation(s)
- Marta Fuentes
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona, España
- Universidad de Navarra, Facultad de Ciencias, Departamento de Biología Ambiental, Irunlarrea 1, 31008 Pamplona, España
| | - German Bosch
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona, España
- Universidad de Navarra, Facultad de Ciencias, Departamento de Biología Ambiental, Irunlarrea 1, 31008 Pamplona, España
| | - David de Hita
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona, España
- Universidad de Navarra, Facultad de Ciencias, Departamento de Biología Ambiental, Irunlarrea 1, 31008 Pamplona, España
| | - Maite Olaetxea
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona, España
- Universidad de Navarra, Facultad de Ciencias, Departamento de Biología Ambiental, Irunlarrea 1, 31008 Pamplona, España
| | - Javier Erro
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona, España
- Universidad de Navarra, Facultad de Ciencias, Departamento de Biología Ambiental, Irunlarrea 1, 31008 Pamplona, España
| | - Angel Ma Zamarreño
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona, España
- Universidad de Navarra, Facultad de Ciencias, Departamento de Biología Ambiental, Irunlarrea 1, 31008 Pamplona, España
| | - Jose Ma Garcia-Mina
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona, España
- Universidad de Navarra, Facultad de Ciencias, Departamento de Biología Ambiental, Irunlarrea 1, 31008 Pamplona, España
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Gao J, Ge S, Wang H, Fang Y, Sun L, He T, Cheng X, Wang D, Zhou X, Cai H, Li C, Liu Y, E Y, Meng J, Chen W. Biochar-extracted liquor stimulates nitrogen related gene expression on improving nitrogen utilization in rice seedling. FRONTIERS IN PLANT SCIENCE 2023; 14:1131937. [PMID: 37404536 PMCID: PMC10317180 DOI: 10.3389/fpls.2023.1131937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 05/04/2023] [Indexed: 07/06/2023]
Abstract
Introduction Biochar has been shown to be an effective soil amendment for promoting plant growth and improving nitrogen (N) utilization. However, the physiological and molecular mechanisms behind such stimulation remain unclear. Methods In this study, we investigated whether biochar-extracted liquor including 21 organic molecules enhance the nitrogen use efficiency (NUE) of rice plants using two N forms (NH4 +-N and NO3 --N). A hydroponic experiment was conducted, and biochar-extracted liquor (between 1 and 3% by weight) was applied to rice seedlings. Results The results showed that biochar-extracted liquor significantly improved phenotypic and physiological traits of rice seedlings. Biochar-extracted liquor dramatically upregulated the expression of rice N metabolism-related genes such as OsAMT1.1, OsGS1.1, and OsGS2. Rice seedlings preferentially absorbed NH4 +-N than NO3 --N (p < 0.05), and the uptake of NH4 +-N by rice seedlings was significantly increased by 33.60% under the treatment of biochar-extracted liquor. The results from molecular docking showed that OsAMT1.1protein can theoretically interact with 2-Acetyl-5-methylfuran, trans-2,4-Dimethylthiane, S, S-dioxide, 2,2-Diethylacetamide, and 1,2-Dimethylaziridine in the biochar-extracted liquor. These four organic compounds have similar biological function as the OsAMT1.1 protein ligand in driving NH4 +-N uptakes by rice plants. Discussion This study highlights the importance of biochar-extracted liquor in promoting plant growth and NUE. The use of low doses of biochar-extracted liquor could be an important way to reduce N input in order to achieve the purpose of reducing fertilizer use and increasing efficiency in agricultural production.
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Affiliation(s)
- Jian Gao
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Shaohua Ge
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Hailong Wang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, China
| | - Yunying Fang
- Australian Rivers Institute, School of Environment and Science, Griffith University, Nathan, QLD, Australia
| | - Luming Sun
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Tianyi He
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Xiaoyi Cheng
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Di Wang
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Xuanwei Zhou
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Heqing Cai
- Bijie Tobacco Company of Guizhou Province, Bijie, China
| | - Caibin Li
- Bijie Tobacco Company of Guizhou Province, Bijie, China
| | - Yanxiang Liu
- Bijie Tobacco Company of Guizhou Province, Bijie, China
| | - Yang E
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Jun Meng
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
| | - Wenfu Chen
- National Biochar Institute of Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang, China
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11
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Yang F, Yuan Y, Liu Q, Zhang X, Gai S, Jin Y, Cheng K. Artificial humic acid promotes growth of maize seedling under alkali conditions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 327:121588. [PMID: 37028787 DOI: 10.1016/j.envpol.2023.121588] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/02/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Salinization of cropland is one of the major abiotic stresses affecting global agricultural sustainability, posing a serious threat to agricultural productivity and food security. Application of artificial humic acid (A-HA) as plant biostimulants has been increasingly attracting farmers and researchers. However, its regulation of seed germination and growth under alkali stress has rarely received attention. The purpose of this study was to investigate the response of maize (Zea mays L.) seed germination and seedling growth after the addition of A-HA. The effects of A-HA on seed germination, seedling growth, chlorophyll contents and osmoregulation substance under black and saline soil conditions were studied by soaking maize in solutions with and without various concentrations of A-HA. Artificial humic acid treatments significantly increased the seed germination index and dry weight of seedlings. The effects of maize root in absence and presence of A-HA under alkali stress were also evaluated using transcriptome sequencing. GO and KEGG analyzes were performed on differentially expressed genes, and the reliability of transcriptome data was verified by qPCR analysis. Results showed that A-HA significantly activated phenylpropanoid biosynthesis, oxidative phosphorylation pathways and plant hormone signal transduction. Moreover, Transcription factor analysis revealed that A-HA induced the expression of several transcription factors under alkali stress which had a regulatory effect on the alleviation of alkali damage in the root system. Overall, our results suggested that soaking seeds with A-HA can alleviate alkali accumulation and toxicity in maize, constituting a simple and effective strategy to mitigate saline toxicity. These results will provide new insights for the application of A-HA in management to reduce alkali-caused crop loss.
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Affiliation(s)
- Fan Yang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China.
| | - Yue Yuan
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Qingyu Liu
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Xi Zhang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Shuang Gai
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Yongxu Jin
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Kui Cheng
- Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China; College of Engineering, Northeast Agricultural University, Harbin, 150030, China
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12
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Molnár Z, Solomon W, Mutum L, Janda T. Understanding the Mechanisms of Fe Deficiency in the Rhizosphere to Promote Plant Resilience. PLANTS (BASEL, SWITZERLAND) 2023; 12:1945. [PMID: 37653862 PMCID: PMC10224236 DOI: 10.3390/plants12101945] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/04/2023] [Accepted: 05/05/2023] [Indexed: 09/02/2023]
Abstract
One of the most significant constraints on agricultural productivity is the low availability of iron (Fe) in soil, which is directly related to biological, physical, and chemical activities in the rhizosphere. The rhizosphere has a high iron requirement due to plant absorption and microorganism density. Plant roots and microbes in the rhizosphere play a significant role in promoting plant iron (Fe) uptake, which impacts plant development and physiology by influencing nutritional, biochemical, and soil components. The concentration of iron accessible to these live organisms in most cultivated soil is quite low due to its solubility being limited by stable oxyhydroxide, hydroxide, and oxides. The dissolution and solubility rates of iron are also significantly affected by soil pH, microbial population, organic matter content, redox processes, and particle size of the soil. In Fe-limiting situations, plants and soil microbes have used active strategies such as acidification, chelation, and reduction, which have an important role to play in enhancing soil iron availability to plants. In response to iron deficiency, plant and soil organisms produce organic (carbohydrates, amino acids, organic acids, phytosiderophores, microbial siderophores, and phenolics) and inorganic (protons) chemicals in the rhizosphere to improve the solubility of poorly accessible Fe pools. The investigation of iron-mediated associations among plants and microorganisms influences plant development and health, providing a distinctive prospect to further our understanding of rhizosphere ecology and iron dynamics. This review clarifies current knowledge of the intricate dynamics of iron with the end goal of presenting an overview of the rhizosphere mechanisms that are involved in the uptake of iron by plants and microorganisms.
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Affiliation(s)
- Zoltán Molnár
- Department of Plant Sciences, Albert Kázmér Faculty of Mosonmagyaróvár, Széchenyi István University, H-9200 Mosonmagyaróvár, Hungary
| | - Wogene Solomon
- Department of Plant Sciences, Albert Kázmér Faculty of Mosonmagyaróvár, Széchenyi István University, H-9200 Mosonmagyaróvár, Hungary
| | - Lamnganbi Mutum
- Department of Plant Sciences, Albert Kázmér Faculty of Mosonmagyaróvár, Széchenyi István University, H-9200 Mosonmagyaróvár, Hungary
| | - Tibor Janda
- Agricultural Institute, Centre for Agricultural Research, H-2462 Martonvásár, Hungary
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Ore OT, Adeola AO, Fapohunda O, Adedipe DT, Bayode AA, Adebiyi FM. Humic substances derived from unconventional resources: extraction, properties, environmental impacts, and prospects. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:59106-59127. [PMID: 37022547 DOI: 10.1007/s11356-023-26809-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/30/2023] [Indexed: 05/10/2023]
Abstract
Humic substances comprise up to 70% of the total organic matter in soils, between 50 and 80% of the dissolved organic matter in water, and about 25% of dissolved organic matter in groundwater. Elucidation of the complex structure and properties of humic substances requires advanced analytical tools; however, they are of fundamental importance in medicine, agriculture, technology, and the environment, at large. Although they are naturally occurring, significant efforts are now being directed into their extraction owing to their relevance in improving soil properties and other environmental applications. In the present review, the different fractions of humic substances were elucidated, underlying the mechanisms by which they function in soils. Furthermore, the extraction processes of humic substances from various feedstock were illustrated, with the alkali extraction technique being the most widely used. In addition, the functional group and elemental composition of humic substances were discussed. The similarities and/or variations in the properties of humic substances as influenced by the source and origin of feedstock were highlighted. Finally, the environmental impacts of humic substances were discussed while highlighting prospects of humic acid production. This review offers enormous potential in identifying these knowledge gaps while recommending the need for inter- and multidisciplinary studies in making extensive efforts toward the sustainable production of humic substances.
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Affiliation(s)
- Odunayo T Ore
- Department of Chemistry, Obafemi Awolowo University, 220005, Ile-Ife, Nigeria.
| | - Adedapo O Adeola
- Department of Chemical Sciences, Adekunle Ajasin University, Akungba Akoko, 001, Ondo State, Nigeria
| | - Oluwaseun Fapohunda
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721, USA
| | - Demilade T Adedipe
- State Key Laboratory of Marine Pollution, Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Ajibola A Bayode
- Department of Chemical Science, Faculty of Natural Sciences, Redeemer's University, Ede, PMB 230, Osun State, Nigeria
| | - Festus M Adebiyi
- Department of Chemistry, Obafemi Awolowo University, 220005, Ile-Ife, Nigeria
- Management and Toxicology Unit, Department of Biological Sciences, Elizade University, Ilara-Mokin, 002, Nigeria
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14
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Marcinčák S, Semjon B, Marcinčáková D, Reitznerová A, Mudroňová D, Vašková J, Nagy J. Humic Substances as a Feed Supplement and the Benefits of Produced Chicken Meat. Life (Basel) 2023; 13:life13040927. [PMID: 37109456 PMCID: PMC10146898 DOI: 10.3390/life13040927] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/20/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
Humic substances with a high proportion of humic acids (more than 40%) have been classified by the European Commission as feed materials that can be used in animal nutrition since 2013. A protective effect on the intestinal mucosa, as well as anti-inflammatory, adsorptive and antimicrobial properties, were recorded. Nutrient absorption, nutritional status and the immune response in chickens supplemented with HSs were significantly improved. HSs have the ability to enhance protein digestion as well as the utilization of calcium and trace elements. They are known to improve feed digestibility as a result of maintaining an optimal pH in the gut, leading to lower levels of nitrogen excretion and less odor in the husbandry environment. HSs not only increase digestibility and result in greater utilization of the feed ration but also improve the overall quality of the meat produced. They increase the protein content and reduce the fat content in breast muscles. They also contribute to improving the sensory characteristics of the meat produced. Their antioxidant properties improve the oxidative stability of meat during storage. The influence of HSs on fatty acid composition may be one of the reasons that meat has a more beneficial effect on the health of consumers.
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Affiliation(s)
- Slavomír Marcinčák
- Department of Food Hygiene, Technology and Safety, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia
| | - Boris Semjon
- Department of Food Hygiene, Technology and Safety, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia
| | - Dana Marcinčáková
- Department of Pharmacology and Toxicology, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia
| | - Anna Reitznerová
- Department of Food Hygiene, Technology and Safety, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia
| | - Dagmar Mudroňová
- Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia
| | - Janka Vašková
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, 040 11 Košice, Slovakia
| | - Jozef Nagy
- Department of Food Hygiene, Technology and Safety, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia
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15
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Yang R, Sun Z, Liu X, Long X, Gao L, Shen Y. Biomass composite with exogenous organic acid addition supports the growth of sweet sorghum ( Sorghum bicolor ' Dochna') by reducing salinity and increasing nutrient levels in coastal saline-alkaline soil. FRONTIERS IN PLANT SCIENCE 2023; 14:1163195. [PMID: 37056508 PMCID: PMC10086266 DOI: 10.3389/fpls.2023.1163195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/10/2023] [Indexed: 06/19/2023]
Abstract
INTRODUCTION In coastal saline lands, organic matter is scarce and saline stress is high. Exploring the promotion effect of intervention with organic acid from biological materials on soil improvement and thus forage output and determining the related mechanism are beneficial to the potential cultivation and resourceful, high-value utilization of coastal mudflats as back-up arable land. METHOD Three exogenous organic acids [humic acid (H), fulvic acid (F), and citric acid (C)] were combined with four kinds of biomass materials [cottonseed hull (CH), cow manure (CM), grass charcoal (GC), and pine needle (PN)] and applied to about 0.3% of medium-salt mudflat soil. The salinity and nutrient dynamics of the soil and the growth and physiological differences of sweet sorghum at the seedling, elongation, and heading stages were observed under different treatments to screen for efficient combinations and analyze the intrinsic causes and influencing mechanisms. RESULTS The soil salinity, nutrient dynamics, and forage grass biological yield during sweet sorghum cultivation in saline soils differed significantly (p < 0.05) depending on the type of organic acid-biomass composite applied. Citric acid-pine needle composite substantially reduced the soil salinity and increased the soil nutrient content at the seedling stage and improved the root vigor and photosynthesis of sweet sorghum by increasing its stress tolerance, allowing plant morphological restructuring for a high biological yield. The improvement effect of fulvic acid-pine needle or fulvic acid-cow manure composite was manifested at the elongation and heading stages. DISCUSSION Citric acid-pine needle composite promoted the growth of saline sweet sorghum seedlings, and the effect of fulvic acid-pine needle composite lasted until the middle and late stages.
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Affiliation(s)
- Ruixue Yang
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Zhengguo Sun
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Xinbao Liu
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Xiaohua Long
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Limin Gao
- Ecological Research Center, Nanjing Institute of Agricultural Sciences in Jiangsu Hilly Area, Nanjing, China
| | - Yixin Shen
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
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16
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Li M, Watanabe S, Gao F, Dubos C. Iron Nutrition in Plants: Towards a New Paradigm? PLANTS (BASEL, SWITZERLAND) 2023; 12:384. [PMID: 36679097 PMCID: PMC9862363 DOI: 10.3390/plants12020384] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/10/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Iron (Fe) is an essential micronutrient for plant growth and development. Fe availability affects crops' productivity and the quality of their derived products and thus human nutrition. Fe is poorly available for plant use since it is mostly present in soils in the form of insoluble oxides/hydroxides, especially at neutral to alkaline pH. How plants cope with low-Fe conditions and acquire Fe from soil has been investigated for decades. Pioneering work highlighted that plants have evolved two different strategies to mine Fe from soils, the so-called Strategy I (Fe reduction strategy) and Strategy II (Fe chelation strategy). Strategy I is employed by non-grass species whereas graminaceous plants utilize Strategy II. Recently, it has emerged that these two strategies are not fully exclusive and that the mechanism used by plants for Fe uptake is directly shaped by the characteristics of the soil on which they grow (e.g., pH, oxygen concentration). In this review, recent findings on plant Fe uptake and the regulation of this process will be summarized and their impact on our understanding of plant Fe nutrition will be discussed.
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Affiliation(s)
- Meijie Li
- IPSiM, University Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Shunsuke Watanabe
- IPSiM, University Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Fei Gao
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Christian Dubos
- IPSiM, University Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
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17
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Goranov AI, Tadini AM, Martin-Neto L, Bernardi ACC, Oliveira PPA, Pezzopane JRM, Milori DMBP, Mounier S, Hatcher PG. Comparison of Sample Preparation Techniques for the (-)ESI-FT-ICR-MS Analysis of Humic and Fulvic Acids. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:12688-12701. [PMID: 35969691 DOI: 10.1021/acs.est.2c01125] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Soil organic matter (SOM) plays a key role in the global carbon and nitrogen cycles. Soil biogeochemistry is regularly studied by extracting the base-soluble fractions of SOM: acid-insoluble humic acid (HA) and acid-soluble fulvic acid (FA). Electrospray ionization-Fourier transform-ion cyclotron resonance-mass spectrometry (ESI-FT-ICR-MS) is commonly utilized for molecularly characterizing these fractions. Different sample preparation techniques exist for the analysis of HA and FA though questions remain regarding data comparability following different preparations. Comparisons of different sample preparation techniques here revealed that the negative-mode ESI-FT-ICR-MS analytical window can be skewed to detect different groups of molecules, with primary differences in oxygenation, aromaticity, and molecular weight. It was also observed that HA and FA from soils versus an aquatic matrix behaved very differently. Thus, we conclude that sample preparation techniques determined to be "most optimal" in our study are in no way universal. We recommend that future studies of HA and FA involve similar comparative studies for determining the most suitable sample preparation technique for their particular type of HA or FA matrices. This will enhance data comparability among different studies and environmental systems and ultimately allow us to better understand the complex composition of environmental matrices.
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Affiliation(s)
- Aleksandar I Goranov
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Avenue, Norfolk, Virginia 23529, United States
| | - Amanda M Tadini
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Avenue, Norfolk, Virginia 23529, United States
- Embrapa Instrumentação, Brazilian Agricultural Research Corporation - Embrapa, Street XV de Novembro, 1452, São Carlos, São Paulo 13560-970, Brazil
| | - Ladislau Martin-Neto
- Embrapa Instrumentação, Brazilian Agricultural Research Corporation - Embrapa, Street XV de Novembro, 1452, São Carlos, São Paulo 13560-970, Brazil
| | - Alberto C C Bernardi
- Embrapa Pecuária Sudeste, Brazilian Agricultural Research Corporation - Embrapa, Rodovia Washington Luiz, Km 234 s/n°, Fazenda Canchim São Carlos, São Paulo 13560-970, Brazil
| | - Patricia P A Oliveira
- Embrapa Pecuária Sudeste, Brazilian Agricultural Research Corporation - Embrapa, Rodovia Washington Luiz, Km 234 s/n°, Fazenda Canchim São Carlos, São Paulo 13560-970, Brazil
| | - José R M Pezzopane
- Embrapa Pecuária Sudeste, Brazilian Agricultural Research Corporation - Embrapa, Rodovia Washington Luiz, Km 234 s/n°, Fazenda Canchim São Carlos, São Paulo 13560-970, Brazil
| | - Débora M B P Milori
- Embrapa Instrumentação, Brazilian Agricultural Research Corporation - Embrapa, Street XV de Novembro, 1452, São Carlos, São Paulo 13560-970, Brazil
| | - Stéphane Mounier
- Unité mixte 110, Mediterranean Institute of Oceanography (MIO), Université de Toulon, Avenue de l'Université - Bat. R, Toulon 83041, France
- Unité mixte 110, MIO, Aix Marseille Université, 163 Avenue de Luminy, Marseille 13288, France
- Unité mixte 110, MIO, Institut de la Recherche et du Développement, 163 Avenue de Luminy, Marseille 13288, France
- Unité mixte 110, MIO, Institut des Sciences de l'Univers, Centre National de la Recherche Scientifique, 163 Avenue de Luminy, Marseille 13288, France
| | - Patrick G Hatcher
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Avenue, Norfolk, Virginia 23529, United States
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18
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Di Iorio E, Circelli L, Angelico R, Torrent J, Tan W, Colombo C. Environmental implications of interaction between humic substances and iron oxide nanoparticles: A review. CHEMOSPHERE 2022; 303:135172. [PMID: 35649442 DOI: 10.1016/j.chemosphere.2022.135172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/17/2022] [Accepted: 05/27/2022] [Indexed: 06/15/2023]
Abstract
Goethite, hematite, ferrihydrite, and other iron oxides bind through various sorption reactions with humic substances (HS) in soils creating nano-, micro-, and macro-aggregates with a specific nature and stability. Long residence times of soil organic matter (SOM) have been attributed to iron-humic substance (Fe-HS) complexes due to physical protection and chemical stabilization at the organic-mineral interface. Humic acids (HA) and fulvic acids (FA) contain many acidic functional groups that interact with Fe oxides through different mechanisms. Due to the numerous interactions between mineral Fe and natural SOM, much research has led into a better identification and definition of HS. In this review, we first focus on the surface colloidal properties of Fe oxides and their reactivity toward HS. These minerals can be efficiently identified by usual techniques, such as XRD, FTIR spectroscopy, XAS, Mössbauer, diffuse reflectance spectroscopies (DRS), HRTEM, ATM, NanoSIMS. Second, we present the recent state of art regarding the adsorption/precipitation of HS onto iron mineral surfaces and their effects on binding metalloid and trace elements. Finally, we consider future research directions based on recent scientific literature, with particular focus on the ability of Fe nano-particles to increase Fe bioavailability, improve carbon sequestration, reduce greenhouse gas emissions, and decrease the impact of persistent organic and inorganic pollutants. The methodology in this field has rapidly developed over the last decade. However, new procedures to estimate the nature of Fe-HA bonds will be important contributions in clarifying the role of natural iron oxides in soil for carbon stabilization.
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Affiliation(s)
- Erika Di Iorio
- Department of Agricultural, Environmental and Food Sciences (DIAAA), University of Molise, V. De Sanctis, I-86100, Campobasso (CB), Italy.
| | - Luana Circelli
- Department of Agricultural, Environmental and Food Sciences (DIAAA), University of Molise, V. De Sanctis, I-86100, Campobasso (CB), Italy
| | - Ruggero Angelico
- Department of Agricultural, Environmental and Food Sciences (DIAAA), University of Molise, V. De Sanctis, I-86100, Campobasso (CB), Italy
| | - José Torrent
- Departamento de Agronomía, Universidad de Córdoba. Edificio C4, Campus de Rabanales, 14071, Córdoba, Spain
| | - Wenfeng Tan
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Claudio Colombo
- Department of Agricultural, Environmental and Food Sciences (DIAAA), University of Molise, V. De Sanctis, I-86100, Campobasso (CB), Italy
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Al-Lami MK, Oustriere N, Gonzales E, Burken JG. Phytomanagement of Pb/Zn/Cu tailings using biosolids-biochar or -humus combinations: Enhancement of bioenergy crop production, substrate functionality, and ecosystem services. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 836:155676. [PMID: 35523335 DOI: 10.1016/j.scitotenv.2022.155676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/24/2022] [Accepted: 04/29/2022] [Indexed: 05/22/2023]
Abstract
The extreme characteristics of mine tailings generally prohibit microbial processes and natural plant growth. Consequently, vast and numerous tailings sites remain barren for decades and highly susceptible to windblown dust and water erosion. Amendment-assisted phytostabilization is a cost-effective and ecologically productive approach to mitigate the potential transport of residual metals. Due to the contrasting and complementary characteristics of biosolids (BS) and biochar (BC), co-application might be more efficient than individually applied. Studies considering BS and BC co-application for multi-metal tailings revegetation are scarce. As tailings revegetation is a multidimensional issue, clearly notable demand exists for a study that provides a comprehensive understanding on the co-application impact on interrelated properties of physicochemical, biological, mineral nitrogen availability, metal immobilization, water-soil interactions, and impacts on plant cultivation and biomass production. This 8-month greenhouse study aimed at investigating the efficacy of co-application strategies targeting BS and carbon-rich amendments (BC or humic substances (HS)) to phytomanage a slightly alkaline Pb/Zn/Cu tailings with bioenergy crops (poplar, willow, and miscanthus). A complementary assessment linking revegetation effectiveness to ecosystem services (ES) provision was also included. Owing to their rich nutrient and organic matter contents, BS had the most pronounced influence on most of the measured properties including physicochemical, enzyme activities, NH4+-N and NO3--N availability, immobilization of Zn, Cu, and Cd, and biomass production. Co-applying with BC exhibited efficient nutrient release and was more effective than BS alone in reducing metal bioavailability and uptake particularly Pb. Poplar and willow exhibited more superior phytostabilization efficiency compared to miscanthus which caused acidification-induced metal mobilization, yet BC and BS co-application was effective in ameliorating this effect. Enhancement of ES and substrate quality index mirrored the positive effect of amendment co-application and plant cultivation. Co-applying HS with BS resulted in improved nutrient cycling while BC enhanced water purification and contamination control services.
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Affiliation(s)
- Mariam K Al-Lami
- Department of Civil, Architectural and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO 65409, United States of America.
| | - Nadège Oustriere
- Univ. Lille, Institut Mines-Télécom, Univ. Artois, JUNIA, ULR 4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France; JUNIA, Health & Environment, Team Environment, F-59000 Lille, France
| | - Eva Gonzales
- Department of Biology, Saint Louis Univ., Saint Louis, MO 63103, United States of America.
| | - Joel G Burken
- Department of Civil, Architectural and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO 65409, United States of America.
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Popa DG, Lupu C, Constantinescu-Aruxandei D, Oancea F. Humic Substances as Microalgal Biostimulants—Implications for Microalgal Biotechnology. Mar Drugs 2022; 20:md20050327. [PMID: 35621978 PMCID: PMC9143693 DOI: 10.3390/md20050327] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 02/01/2023] Open
Abstract
Humic substances (HS) act as biostimulants for terrestrial photosynthetic organisms. Their effects on plants are related to specific HS features: pH and redox buffering activities, (pseudo)emulsifying and surfactant characteristics, capacity to bind metallic ions and to encapsulate labile hydrophobic molecules, ability to adsorb to the wall structures of cells. The specific properties of HS result from the complexity of their supramolecular structure. This structure is more dynamic in aqueous solutions/suspensions than in soil, which enhances the specific characteristics of HS. Therefore, HS effects on microalgae are more pronounced than on terrestrial plants. The reported HS effects on microalgae include increased ionic nutrient availability, improved protection against abiotic stress, including against various chemical pollutants and ionic species of potentially toxic elements, higher accumulation of value-added ingredients, and enhanced bio-flocculation. These HS effects are similar to those on terrestrial plants and could be considered microalgal biostimulant effects. Such biostimulant effects are underutilized in current microalgal biotechnology. This review presents knowledge related to interactions between microalgae and humic substances and analyzes the potential of HS to enhance the productivity and profitability of microalgal biotechnology.
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Affiliation(s)
- Daria Gabriela Popa
- Faculty of Biotechnologies, University of Agronomic Sciences and Veterinary Medicine of Bucharest, Mărăști Blv, No. 59, Sector 1, 011464 Bucharest, Romania;
- Bioproducts Team, Bioresources Department, National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independenței No. 202, Sector 6, 060021 Bucharest, Romania;
| | - Carmen Lupu
- Bioproducts Team, Bioresources Department, National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independenței No. 202, Sector 6, 060021 Bucharest, Romania;
| | - Diana Constantinescu-Aruxandei
- Bioproducts Team, Bioresources Department, National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independenței No. 202, Sector 6, 060021 Bucharest, Romania;
- Correspondence: (D.C.-A.); (F.O.)
| | - Florin Oancea
- Faculty of Biotechnologies, University of Agronomic Sciences and Veterinary Medicine of Bucharest, Mărăști Blv, No. 59, Sector 1, 011464 Bucharest, Romania;
- Bioproducts Team, Bioresources Department, National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independenței No. 202, Sector 6, 060021 Bucharest, Romania;
- Correspondence: (D.C.-A.); (F.O.)
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Tahoun AMMA, El-Enin MMA, Mancy AG, Sheta MH, Shaaban A. Integrative Soil Application of Humic Acid and Foliar Plant Growth Stimulants Improves Soil Properties and Wheat Yield and Quality in Nutrient-Poor Sandy Soil of a Semiarid Region. JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION 2022; 22:2857-2871. [PMID: 35528198 PMCID: PMC9059912 DOI: 10.1007/s42729-022-00851-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
Sandy soils (containing > 50% sand) are widely distributed worldwide and are characterized by their poor structure, low organic matter, weak hydraulic and nutritional properties, and low crop productivity. Using a 2-year pot experiment, in this study, we investigated the effects of humic acid (HA) as a soil amendment and study two plant growth stimulants (PGSs), zinc oxide nanoparticles (ZnONPs), and L-tryptophan (L-TRP), as a foliar application on wheat grown in nutrient-poor sandy soil. Three HA rates (0 (HA0), 0.2 (HA0.2), and 0.4 (HA0.4) g kg-1 soil) and five PGS levels [control, 50 mg l-1 (ZnONPs50), 100 mg l-1 (ZnONPs100), 0.25 mmol l-1 (L-TRP0.25), and 0.5 mmol l-1 (L-TRP0.5)] were used. The soil hydro-physico-chemical properties, morpho-physiological responses, yield, and quality were measured. HA addition amended the soil structure by allowing rapid macroaggregate formation, decreasing bulk density and pH, and increasing porosity and electrical conductivity, thereby improving soil hydraulic properties. HA0.2 and HA0.4 additions improved growth, yield components, and grain minerals, resulting in higher grain yield by 28.3-54.4%, grain protein by 10.2-13.4%, wet gluten by 18.2-23.3%, and dry gluten by 23.5-29.5%, respectively, than HA0. Foliar application of ZnONPs or L-TRP, especially at higher concentrations compared to the control, noticeably recorded the same positive results as HA treatments. The best results were achieved through the integration of HA0.4 + ZnONPs100 or L-TRP0.5 to the tested nutrient-poor sandy soil. The interactive application of HA0.4 + ZnONPs100 or L-TRP0.5 and the use of mineral fertilizer, which is considered a surplus point in permaculture, can be recommended for sustainable wheat production in nutrient-poor sandy soil.
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Affiliation(s)
| | | | - Ahmed G. Mancy
- Soils and Water Department, Faculty of Agriculture, Al-Azhar University, Cairo, 11884 Egypt
| | - Mohamed H. Sheta
- Soils and Water Department, Faculty of Agriculture, Al-Azhar University, Cairo, 11884 Egypt
| | - Ahmed Shaaban
- Agronomy Department, Faculty of Agriculture, Fayoum University, Fayoum, 63514 Egypt
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22
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Influence of Liming Intensity on Fractions of Humified Organic Carbon in Acid Soil: A Case Study. SUSTAINABILITY 2022. [DOI: 10.3390/su14095297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Soil pH influences the composition and activities of microbial communities, which are driving the transformations of soil organic carbon (SOC). However, the effect of liming on SOC sequestration remains controversial. Evaluation of the effect of liming on SOC and humified carbon fractions was one of the most important tasks of this work. Studies were carried out in the long-term field experiment using slaked-lime rates of 0.5 or 2.0, depending on the soil hydrolytic acidity. It was determined that liming did not increase SOC content, but led to redistribution of SOC. The amount of mobile humic acids in the soil decreased while the intensity of liming increased. When liming at the 2.0 rate, the lowest HA1 level (0.251 g kg−1 C) and highest amount of HA2 (0.21 g kg−1 C) were found. It could be stated that soil liming, as a measure, allows the stabilization of HA and FA by the cation bridging mechanism. Liming resulted in slower mineralization of SOC and at the same time it also resulted in carbon sequestration in the form of valuable humic acids. An important consistent pattern of carbon transformation was identified in this study and can be applied in selecting of the most suitable combination of agricultural practices, promoting carbon sequestration and soil fertility.
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Abstract
The aim of the paper is to give an overview on the chemistry of soil organic carbon (SOC) affecting nutrient availability, the emission of greenhouse gases and detoxifying harmful substances in soil. Humic substances represent the stable part of SOC, accounting for between 50 and more than 80% of organically bound carbon in soil. Humic substances strongly affect the soil solution concentration of several plant nutrients and may increase P-, Fe-, and Cu- solubility, thereby increasing their plant availability. Soil organic carbon, mainly humic substances, can detoxify monomeric Al in acid soils, can strongly bind toxic heavy metals, making them unavailable to the plant roots, and may strongly bind a vast variety of harmful organic pollutants. Increasing SOC is an important goal in agriculture. The inclusion of mixtures of semi-perennial plant species and cultivars may strongly increase SOC and humic substance content in soils. To increase SOC, farmyard manure and its rotted or composted forms are superior compared to the separate application of straw and slurry to soil. The storage of carbon, mainly in organic form, in soils is very important in the context of the emission of greenhouse gases. Worldwide, soils release about 10 times more greenhouse gases compared to fossil fuel combustion. Small increments in SOC worldwide will strongly affect the concentration of atmospheric CO2. The public discussion on soil fertility and greenhouse gas emissionshas been politically controlled in a way that leaves the important and positive contribution of soil organic carbon and mainly humic substances partly misinterpreted and partly underestimated.
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Santos JLA, Busato JG, Pittarello M, da Silva J, Horák-Terra I, Evaristo AB, Dobbss LB. Alkaline extract from vermicompost reduced the stress promoted by As on maize plants and increase their phytoextraction capacity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:20864-20877. [PMID: 34741736 DOI: 10.1007/s11356-021-17255-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/24/2021] [Indexed: 06/13/2023]
Abstract
Arsenic (As) represents an environmental risk and phytoremediation has been identified as a good technique to recover contaminated soils. Plants defense mechanisms needed to be enhanced against As stress-promoting action by biostimulants such as humic materials. This work sought to determine the effectiveness of an alkaline vermicompost extract (AEV) and in mitigating stresses promoted by As in maize plants, increasing their potential use for phytoextraction. The AEV were extracted from vermicompost and two preliminary assays in Leonard pots were carried out: the first one to define the best AEV concentration-response dose and the second to point out the toxic As concentration. The second step was to set up a 28-day long experiment with the following four treatments: control, AEV, As, As + AEV. AEV attenuated As-induced stress in maize plants. Maize dry biomass was reduced in the As treatment and rebalanced to values similar to the control in the As + HS treatment while the plants treated only with HS showed the highest biomass among the treatments. The concentrations of P, Fe, Cu, Mn and Ni, and catalase (CAT), ascorbate peroxidase (APX) and superoxide dismutase (SOD) antioxidant activity increased in the As treatment and decreased in the As + AEV treatment. The rate of photosynthesis decreased, and the internal CO2 concentration increased with stress induced by As, where both effects were attenuated by AEV. Our results show the positive effect of the AEV in alleviating As abiotic stress on maize growth, offering new options of employment of humic substances in phytoremediation process.
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Affiliation(s)
- Jefferson Luiz Antunes Santos
- Institute of Agricultural Sciences (ICA), Federal University of the Jequitinhonha and Mucuri (UFVJM), Unaí, MG, 38610-000, Brazil.
| | - Jader Galba Busato
- Faculty of Agronomy and Veterinary Medicine, University of Brasilia (UnB), Brasília, DF, 70910-900, Brazil
| | - Marco Pittarello
- Department of Agronomy, Animals and the Environment (DAFNAE), Natural Resources, University of Padova, 35020, FoodLegnaro, Italy
| | - Juscimar da Silva
- Brazilian Agricultural Research Corporation (Embrapa), Fazenda Tamanduá, Embrapa HortaliçasParque Estação Biológica, Brasília, DF, 70770-901, Brazil
| | - Ingrid Horák-Terra
- Institute of Agricultural Sciences (ICA), Federal University of the Jequitinhonha and Mucuri (UFVJM), Unaí, MG, 38610-000, Brazil
| | - Anderson Barbosa Evaristo
- Institute of Agricultural Sciences (ICA), Federal University of the Jequitinhonha and Mucuri (UFVJM), Unaí, MG, 38610-000, Brazil
| | - Leonardo Barros Dobbss
- Institute of Agricultural Sciences (ICA), Federal University of the Jequitinhonha and Mucuri (UFVJM), Unaí, MG, 38610-000, Brazil
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25
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Wang X, Du Y, Li F, Fang L, Pang T, Wu W, Liu C, Chen L. Unique feature of Fe-OM complexes for limiting Cd accumulation in grains by target-regulating gene expression in rice tissues. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127361. [PMID: 34879560 DOI: 10.1016/j.jhazmat.2021.127361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/23/2021] [Accepted: 09/25/2021] [Indexed: 06/13/2023]
Abstract
The excessive accumulation of cadmium (Cd) in rice grains is highly determined by the expression of specific genes in different tissues. Targeted gene regulation in rice plants is a long-standing challenge. Herein, a new strategy for regulating target gene expression responsible for Cd absorption and translocation in roots and leaves was developed by complexing Fe(II) with organic matter (i.e., Fe-OM) with the optimal mass ratio of 1. Results showed that Fe-OM noticeably reduced the grain Cd content from 0.48 ± 0.04 mg kg-1 to 0.25 ± 0.03 mg kg-1, exhibiting a significantly higher capacity in mitigating Cd accumulation in grains than Fe(II) or OM alone. The translocation factor (TF) was reduced from 0.14 (control) to 0.08 by Fe-FA from root to grain, which could be due to the preferential Cd translocation to leaves (i.e., TFroot to leaves was enhanced four times by the complex of Fe(II) with fulvic acid (Fe-FA). Further gene analysis revealed that the cooperative effects of OsNramp1 and OsNramp5 downregulation in roots/stems and OsLCT1 upregulation in leaves contributed to the mitigation of Cd in grains. This work provides a new strategy to regulating target gene expression in specific tissues to alleviate Cd accumulation in grains.
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Affiliation(s)
- Xiangqin Wang
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China
| | - Yanhong Du
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Fangbai Li
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China
| | - Liping Fang
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China.
| | - Tingting Pang
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China
| | - Weijian Wu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China
| | - Chuanping Liu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China
| | - Lei Chen
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China
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26
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Garnica M, Baigorri R, San Francisco S, Zamarreño AM, Garcia-Mina JM. Humic Acid Alleviates Fe Chlorosis in Graminaceous Plants Through Coordinated Fe-Dependent and Fe-Independent Mechanisms. FRONTIERS IN PLANT SCIENCE 2022; 13:803013. [PMID: 35185979 PMCID: PMC8849133 DOI: 10.3389/fpls.2022.803013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
Many studies have shown the close relationship between the beneficial action of soil and sedimentary humic acids on the growth of plants cultivated in calcareous soils and their ability to improve Fe plant nutrition. These results have been ascribed to the humic acid (HA) capability to improve Fe solubility and bioavailability. However, other effects more related to a humic acid action on the specific mechanisms activated in roots of plants under Fe deficiency cannot be ruled out. Although this question has been studied in dicotyledonous plants, in graminaceous plants there are no specific studies. Here we investigate the ability of a humic acid extracted from peat (HA) to improve Fe nutrition in wheat plants cultivated under Fe deficient and sufficient conditions. The results show that HA can improve the physiological status of Fe deficient wheat plants by alleviating some of the deleterious consequences of Fe deficiency on plant development and increasing the plant ability to secrete phytosiderophores to the nutrient solution. This action of HA is associated with increases in the Fe-active pool in leaves that might be related to the mobilization of the Fe complexed by HA resulting from the interaction of HA with the phytosiderophores in the nutrient solution. The Fe translocation from the root to the shoot may be favored by the action of trans-Zeatin Riboside (tZR) since the leaf concentration of this phytohormone was enhanced by HA in Fe deficient plants.
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Affiliation(s)
- Maria Garnica
- BACh Research Group, Department of Environmental Biology, Instituto de Biodiversidad y Medioambiente (BIOMA), University of Navarra, Pamplona, Spain
| | - Roberto Baigorri
- BACh Research Group, Department of Environmental Biology, Instituto de Biodiversidad y Medioambiente (BIOMA), University of Navarra, Pamplona, Spain
| | - Sara San Francisco
- BACh Research Group, Department of Environmental Biology, Instituto de Biodiversidad y Medioambiente (BIOMA), University of Navarra, Pamplona, Spain
| | - Angel M. Zamarreño
- BACh Research Group, Department of Environmental Biology, Instituto de Biodiversidad y Medioambiente (BIOMA), University of Navarra, Pamplona, Spain
| | - Jose M. Garcia-Mina
- BACh Research Group, Department of Environmental Biology, Instituto de Biodiversidad y Medioambiente (BIOMA), University of Navarra, Pamplona, Spain
- Centre Mondial de l’Innovation (CMI) – Groupe Roullier, Saint-Maló, France
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Nanodispersions of Polyelectrolytes Based on Humic Substances: Isolation, Physico-Chemical Characterization and Evaluation of Biological Activity. Pharmaceutics 2021; 13:pharmaceutics13111954. [PMID: 34834368 PMCID: PMC8623726 DOI: 10.3390/pharmaceutics13111954] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 12/16/2022] Open
Abstract
Natural polyelectrolytes, including in the form of complexes with colloidal particles, are increasingly used in pharmacy due to the possibility of regulated attachment of medicinal substances and their targeted delivery to the target organ. However, the formation, stability, and molecular-mass characteristics of polyelectrolyte nanodispersions (ND) vary depending on the nature and composition of the medium of their origin. This is due to the lack of standardized approaches to quality control and regulatory documentation for most natural ND. In this paper, we first introduced the isolation, followed by investigations into their physico-chemical properties and bioactivity. Using the dried droplet method, we were able to detect the “coffee ring effect”. Fractographic studies of the surface structure of EHA and FA dried samples using SEM showed its heterogeneity and the presence of submicron particles encapsulated in the internal molecular cavities of polyelectrolyte. FTIR spectroscopy revealed the ND chemical structure of benzo-α-pyron and benzo-γ-pyron, consisting of nanoparticles and a branched frame part. The main elements detected by X-ray fluorescence in humic substance extract and fulvic acid include Si, P, S, K, Ca, Mn, Fe, Cu, Zn, whereas Fe is in high concentrations. The UV-spectra and fluorescent radiation demonstrated the possibility of studying the effect of the fulvate chromone structure on its optical properties. It is shown that dilution of the initial solutions of polyelectrolytes 1:10 contributes to the detection of smaller nanoparticles and an increase in the absolute value of the negative ζ-potential as a factor of ND stability. A study of the EHS effect on the SARS-CoV-2 virus infectious titer in the Vero E6 cell showed the effective against virus both in the virucidal scheme (the SI is 11.90–22.43) and treatment/prevention scheme (the SI is 34.85–57.33). We assume that polyelectrolyte ND prevent the binding of the coronavirus spike glycoprotein to the receptor. Taking into account the results obtained, we expect that the developed approach can become unified for the standardization of the ND natural polyelectrolytes complex, which has great prospects for use in pharmacy and medicine as a drug with antiviral activity.
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28
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da Silva MSRDA, Dos Santos BDMS, da Silva CSRDA, da Silva CSRDA, Antunes LFDS, Dos Santos RM, Santos CHB, Rigobelo EC. Humic Substances in Combination With Plant Growth-Promoting Bacteria as an Alternative for Sustainable Agriculture. Front Microbiol 2021; 12:719653. [PMID: 34777275 PMCID: PMC8589081 DOI: 10.3389/fmicb.2021.719653] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/16/2021] [Indexed: 11/13/2022] Open
Abstract
Plant growth-promoting bacteria (PGPB) and humic substances (HSs) are promising options for reducing the use of pesticides and mineral fertilizers. Although many studies have shown the effects of PGPB and HSs separately, little information is available on plant responses to the combined application of these biostimulants despite the great potential for the simultaneous action of these biological inputs. Thus, the objective of this review is to present an overview of scientific studies that addressed the application of PGPB and HSs to different crops. First, we discuss the effect of these biostimulants on biological nitrogen fixation, the various effects of the inoculation of beneficial bacteria combined with the application of HSs on promoting the growth of nonleguminous plants and how this combination can increase bacterial colonization of plant hosts. We also address the effect of PGPB and HSs on plant responses to abiotic stresses, in addition to discussing the role of HSs in protecting plants against pathogens. There is a lack of studies that address the role of PGPB + HSs in biocontrol. Understanding the factors involved in the promotion of plant growth through the application of PGPB and HSs can assist in the development of efficient biostimulants for agricultural management. This approach has the potential to accelerate the transition from conventional cultivation to sustainable agrosystems.
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Affiliation(s)
| | | | - Camilla Santos Reis de Andrade da Silva
- Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil.,National Agrobiology Research Center, Embrapa Agrobiologia, Seropédica, Brazil
| | | | | | | | | | - Everlon Cid Rigobelo
- Department of Agricultural Production Sciences, Universidade Estadual Paulista, Jaboticabal, Brazil
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Kholif A, Matloup O, EL-Bltagy E, Olafadehan O, Sallam S, El-Zaiat H. Humic substances in the diet of lactating cows enhanced feed utilization, altered ruminal fermentation, and improved milk yield and fatty acid profile. Livest Sci 2021. [DOI: 10.1016/j.livsci.2021.104699] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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30
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Mridha D, Paul I, De A, Ray I, Das A, Joardar M, Chowdhury NR, Bhadoria PBS, Roychowdhury T. Rice seed (IR64) priming with potassium humate for improvement of seed germination, seedling growth and antioxidant defense system under arsenic stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 219:112313. [PMID: 34004453 DOI: 10.1016/j.ecoenv.2021.112313] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 04/20/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
The intolerable levels of arsenic (As) in groundwater and its application in rice cultivation are continuously affecting the rice production in Ganga-Meghna-Brahmaputra (GMB) plain. The reduced germination and plant growth rates under excessive As stress ultimately lead to lower yield. To mitigate this concerning issue, the present study was carried out to evaluate the potential of K-humate priming on seed germination and plant growth under As stress. Seeds were primed with 100 mg/l K-humate for 12 h prior to germination. The germination percentages in unprimed seeds were 65 ± 5.0% and 58.3 ± 7.6% under stress level of 50 μM AsV and 50 μM AsIII, respectively. However, germination percentage in K-humate primed seeds were 75 ± 5.0% and 68.3 ± 2.9% under AsV and AsIII stress, respectively. The vigour index I (VG I) and vigour index II (VG II) recorded on 12 DAS (days after seeding) were also increased by 1.47 and 1.51 fold, respectively with K-humate supplementation under As stress. Detrimental effects of AsIII on seed germination, seedling growth and other physiological parameters were more suppressive than AsV. Application of K-humate not only improved seed germination, seedling growth and nutrient uptake but also decreased the oxidative stress markers and antioxidant activities by minimizing As uptake and translocation in the seedlings.
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Affiliation(s)
- Deepanjan Mridha
- School of Environmental Studies, Jadavpur University, Kolkata 700032, India
| | - Ishita Paul
- Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Ayan De
- School of Environmental Studies, Jadavpur University, Kolkata 700032, India
| | - Iravati Ray
- School of Environmental Studies, Jadavpur University, Kolkata 700032, India
| | - Antara Das
- School of Environmental Studies, Jadavpur University, Kolkata 700032, India
| | - Madhurima Joardar
- School of Environmental Studies, Jadavpur University, Kolkata 700032, India
| | | | - Pratap Bhanu Singh Bhadoria
- Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Tarit Roychowdhury
- School of Environmental Studies, Jadavpur University, Kolkata 700032, India.
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de Morais EG, Silva CA, Jindo K. Humic Acid Improves Zn Fertilization in Oxisols Successively Cultivated with Maize-Brachiaria. Molecules 2021; 26:molecules26154588. [PMID: 34361755 PMCID: PMC8348479 DOI: 10.3390/molecules26154588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/21/2021] [Accepted: 07/24/2021] [Indexed: 11/23/2022] Open
Abstract
Zinc (Zn) is an essential micronutrient for plant growth, and Zn deficiency is a global issue, especially in tropical soils. This study aimed to investigate the effects of humic acid (HA) and the Zn addition (Zn sulfate + HA) on the growth of maize and brachiaria in two contrasting Oxisols. The potential complexation of Zn sulfate by HA was evaluated by Fourier-transform infrared (FTIR) spectroscopy analysis. Zinc content and its availability in solution and the shoot and root biomass of maize and brachiaria were determined. FTIR spectroscopy revealed the complexation of Zn sulfate by HA through its S and C functional groups. In both Oxisols, solution Zn increased due to the combined use of Zn and HA. In a soil type-dependent manner, maize biomass and Zn in its shoots were affected only by the exclusive use of Zn fertilization. In the Yellow Oxisol, brachiaria growth and Zn accumulated in its shoot were positively affected by the combined use of Zn fertilization with HA. In the Oxisol with lower organic matter content, HA can assure adequate supplying of residual Zn, while increasing growth of brachiaria cultivated in sequence to maize.
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Affiliation(s)
| | - Carlos Alberto Silva
- Soil Science Department, Federal University of Lavras, Lavras 37200-000, Brazil;
- Correspondence: (C.A.S.); (K.J.)
| | - Keiji Jindo
- Agrosystems Research, Wageningen University & Research, P.O. Box 16, 6700 AA Wageningen, The Netherlands
- Correspondence: (C.A.S.); (K.J.)
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Cristofano F, El-Nakhel C, Rouphael Y. Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species. Biomolecules 2021; 11:1103. [PMID: 34439770 PMCID: PMC8392623 DOI: 10.3390/biom11081103] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 11/17/2022] Open
Abstract
Climate change is a pressing matter of anthropogenic nature to which agriculture contributes by abusing production inputs such as inorganic fertilizers and fertigation water, thus degrading land and water sources. Moreover, as the increase in the demand of food in 2050 is estimated to be 25 to 70% more than what is currently produced today, a sustainable intensification of agriculture is needed. Biostimulant substances are products that the EU states work by promoting growth, resistance to plant abiotic stress, and increasing produce quality, and may be a valid strategy to enhance sustainable agricultural practice. Presented in this review is a comprehensive look at the scientific literature regarding the widely used and EU-sanctioned biostimulant substances categories of silicon, seaweed extracts, protein hydrolysates, and humic substances. Starting from their origin, the modulation of plants' hormonal networks, physiology, and stress defense systems, their in vivo effects are discussed on some of the most prominent vegetable species of the popular plant groupings of cucurbits, leafy greens, and nightshades. The review concludes by identifying several research areas relevant to biostimulant substances to exploit and enhance the biostimulant action of these substances and signaling molecules in horticulture.
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Affiliation(s)
| | | | - Youssef Rouphael
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy; (F.C.); (C.E.-N.)
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Baltazar M, Correia S, Guinan KJ, Sujeeth N, Bragança R, Gonçalves B. Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview. Biomolecules 2021; 11:biom11081096. [PMID: 34439763 PMCID: PMC8394449 DOI: 10.3390/biom11081096] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/17/2021] [Accepted: 07/21/2021] [Indexed: 01/10/2023] Open
Abstract
As the world develops and population increases, so too does the demand for higher agricultural output with lower resources. Plant biostimulants appear to be one of the more prominent sustainable solutions, given their natural origin and their potential to substitute conventional methods in agriculture. Classified based on their source rather than constitution, biostimulants such as humic substances (HS), protein hydrolysates (PHs), seaweed extracts (SWE) and microorganisms have a proven potential in improving plant growth, increasing crop production and quality, as well as ameliorating stress effects. However, the multi-molecular nature and varying composition of commercially available biostimulants presents challenges when attempting to elucidate their underlying mechanisms. While most research has focused on the broad effects of biostimulants in crops, recent studies at the molecular level have started to unravel the pathways triggered by certain products at the cellular and gene level. Understanding the molecular influences involved could lead to further refinement of these treatments. This review comprises the most recent findings regarding the use of biostimulants in plants, with particular focus on reports of their molecular influence.
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Affiliation(s)
- Miguel Baltazar
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal; (S.C.); (B.G.)
- Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production (Inov4Agro), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
- Correspondence:
| | - Sofia Correia
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal; (S.C.); (B.G.)
- Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production (Inov4Agro), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
| | - Kieran J. Guinan
- BioAtlantis Ltd., Clash Industrial Estate, Tralee, V92 RWV5 County Kerry, Ireland; (K.J.G.); (N.S.)
| | - Neerakkal Sujeeth
- BioAtlantis Ltd., Clash Industrial Estate, Tralee, V92 RWV5 County Kerry, Ireland; (K.J.G.); (N.S.)
| | - Radek Bragança
- BioComposites Centre, Bangor University, Bangor LL57 2UW, UK;
| | - Berta Gonçalves
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal; (S.C.); (B.G.)
- Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production (Inov4Agro), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
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Liu M, Lin Z, Ke X, Fan X, Joseph S, Taherymoosavi S, Liu X, Bian R, Solaiman ZM, Li L, Pan G. Rice Seedling Growth Promotion by Biochar Varies With Genotypes and Application Dosages. FRONTIERS IN PLANT SCIENCE 2021; 12:580462. [PMID: 34234791 PMCID: PMC8256797 DOI: 10.3389/fpls.2021.580462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 05/25/2021] [Indexed: 06/13/2023]
Abstract
While biochar use in agriculture is widely advocated, how the effect of biochar on plant growth varies with biochar forms and crop genotypes is poorly addressed. The role of dissolvable organic matter (DOM) in plant growth has been increasingly addressed for crop production with biochar. In this study, a hydroponic culture of rice seedling growth of two cultivars was treated with bulk mass (DOM-containing), water extract (DOM only), and extracted residue (DOM-free) of maize residue biochar, at a volumetric dosage of 0.01, 0.05, and 0.1%, respectively. On seedling root growth of the two cultivars, bulk biochar exerted a generally negative effect, while the biochar extract had a consistently positive effect across the application dosages. Differently, the extracted biochar showed a contrasting effect between genotypes. In another hydroponic culture with Wuyunjing 7 treated with biochar extract at sequential dosages, seedling growth was promoted by 95% at 0.01% dosage but by 26% at 0.1% dosage, explained with the great promotion of secondary roots rather than of primary roots. Such effects were likely explained by low molecular weight organic acids and nanoparticles contained in the biochar DOM. This study highlights the importance of biochar DOM and crop genotype when evaluating the effect of biochar on plants. The use of low dosage of biochar DOM could help farmers to adopt biochar technology as a solution for agricultural sustainability.
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Affiliation(s)
- Minglong Liu
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
- School of Agriculture and Environment, UWA Institute of Agriculture, University of Western Australia, Perth, WA, Australia
| | - Zhi Lin
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Xianlin Ke
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Xiaorong Fan
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Stephen Joseph
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
- School of Materials Science and Engineering, University of New South Wales, Kensington, NSW, Australia
| | - Sarasadat Taherymoosavi
- School of Materials Science and Engineering, University of New South Wales, Kensington, NSW, Australia
| | - Xiaoyu Liu
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Rongjun Bian
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Zakaria M. Solaiman
- School of Agriculture and Environment, UWA Institute of Agriculture, University of Western Australia, Perth, WA, Australia
| | - Lianqing Li
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Genxing Pan
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, China
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A Metabolic Choreography of Maize Plants Treated with a Humic Substance-Based Biostimulant under Normal and Starved Conditions. Metabolites 2021; 11:metabo11060403. [PMID: 34202973 PMCID: PMC8235525 DOI: 10.3390/metabo11060403] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 06/08/2021] [Accepted: 06/15/2021] [Indexed: 11/17/2022] Open
Abstract
Humic substance (HS)-based biostimulants show potentials as sustainable strategies for improved crop development and stress resilience. However, cellular and molecular mechanisms governing the agronomically observed effects of HS on plants remain enigmatic. Here, we report a global metabolic reprogramming of maize leaves induced by a humic biostimulant under normal and nutrient starvation conditions. This reconfiguration of the maize metabolism spanned chemical constellations, as revealed by molecular networking approaches. Plant growth and development under normal conditions were characterized by key differential metabolic changes such as increased levels of amino acids, oxylipins and the tricarboxylic acid (TCA) intermediate, isocitric acid. Furthermore, under starvation, the humic biostimulant significantly impacted pathways that are involved in stress-alleviating mechanisms such as redox homeostasis, strengthening of the plant cell wall, osmoregulation, energy production and membrane remodelling. Thus, this study reveals that the humic biostimulant induces a remodelling of inter-compartmental metabolic networks in maize, subsequently readjusting the plant physiology towards growth promotion and stress alleviation. Such insights contribute to ongoing efforts in elucidating modes of action of biostimulants, generating fundamental scientific knowledge that is necessary for development of the biostimulant industry, for sustainable food security.
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van Tol de Castro TA, Berbara RLL, Tavares OCH, Mello DFDG, Pereira EG, Souza CDCBD, Espinosa LM, García AC. Humic acids induce a eustress state via photosynthesis and nitrogen metabolism leading to a root growth improvement in rice plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 162:171-184. [PMID: 33684776 DOI: 10.1016/j.plaphy.2021.02.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Chemical eustressors induce a eustress state "positive stress" increasing the resistance and improve the plant growth. The potentiality of humic acids (HA) to act as a eustressor has been scarcely explored. The present study aims to evaluate how HA with different structural characteristics induce differently, a eustress state in rice plants through the regulation of photosynthesis. The photosynthetic performance index showed an initial eustress state in plant by HA application characterized by reduction in photosynthesis followed by an increase in photosynthetic efficiency. The HA as a chemical eustressor triggering changes in plant metabolism indicate that the interaction of HA with root system induces a roots growth stimulus preceded by an initial positive stress. The eustress caused by HA is differentiated and is related to its chemical-physics characteristics. The HAVC, with a predominance of CAlkyl-(O,N), CAlkyl-di-O, CAromatic-O structures and greater polarity, stimulated the accumulation of N-NO3- and of soluble sugars in the sheath, increase carbohydrates content in the root and the root emission, resulting in higher total biomass production. The HASOIL, with a predominance of CCOOH-(H,R), CAlkyl-O, CAromatic-H,R structures and greater hydrophobicity caused a decrease in N-NH4+ and N-amine. The HARN, with a predominance of CAlkyl-O, CAlkyl-H,R, and CO, characterized by average polarity, caused an increase in photosynthetic pigment and N-NH4+ content. These results are keys to understand that quality of soil organic matter is related to plant development and that HA are efficient proxies for elucidate its function in natural environments.
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Affiliation(s)
- Tadeu Augusto van Tol de Castro
- Laboratory of Soil Biological Chemistry, Department of Soils, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil.
| | - Ricardo Luiz Louro Berbara
- Laboratory of Soil Biological Chemistry, Department of Soils, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil
| | - Orlando Carlos Huertas Tavares
- Laboratory of Soil Biological Chemistry, Department of Soils, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil
| | - Débora Fernandes da Graça Mello
- Laboratory of Soil Biological Chemistry, Department of Soils, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil
| | - Erinaldo Gomes Pereira
- Laboratory of Plant Mineral Nutrition, Department of Soils, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil
| | | | - Luis Maqueira Espinosa
- Laboratory of Physical-Chemistry of Surfactants (LASURF), Pontifical Catholic University of Rio de Janeiro, Brazil
| | - Andrés Calderín García
- Laboratory of Soil Biological Chemistry, Department of Soils, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil
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Nardi S, Schiavon M, Francioso O. Chemical Structure and Biological Activity of Humic Substances Define Their Role as Plant Growth Promoters. Molecules 2021; 26:molecules26082256. [PMID: 33924700 PMCID: PMC8070081 DOI: 10.3390/molecules26082256] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 03/30/2021] [Accepted: 04/07/2021] [Indexed: 02/07/2023] Open
Abstract
Humic substances (HS) are dominant components of soil organic matter and are recognized as natural, effective growth promoters to be used in sustainable agriculture. In recent years, many efforts have been made to get insights on the relationship between HS chemical structure and their biological activity in plants using combinatory approaches. Relevant results highlight the existence of key functional groups in HS that might trigger positive local and systemic physiological responses via a complex network of hormone-like signaling pathways. The biological activity of HS finely relies on their dosage, origin, molecular size, degree of hydrophobicity and aromaticity, and spatial distribution of hydrophilic and hydrophobic domains. The molecular size of HS also impacts their mode of action in plants, as low molecular size HS can enter the root cells and directly elicit intracellular signals, while high molecular size HS bind to external cell receptors to induce molecular responses. Main targets of HS in plants are nutrient transporters, plasma membrane H+-ATPases, hormone routes, genes/enzymes involved in nitrogen assimilation, cell division, and development. This review aims to give a detailed survey of the mechanisms associated to the growth regulatory functions of HS in view of their use in sustainable technologies.
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Affiliation(s)
- Serenella Nardi
- Department of Agronomy, Food, Natural Resources, Animals and Environment, Università degli Studi di Padova, V.le dell’Università 16, Legnaro, 35020 Padova, Italy;
| | - Michela Schiavon
- Department of di of Agricultural, Forest and Food Sciences (DISAFA), University of Turin, Largo Paolo Braccini 2 (già Via Leonardo da Vinci, 44), 10095 Grugliasco, Italy
- Correspondence:
| | - Ornella Francioso
- Department of Agricultural and Food Sciences, University of Bologna, Viale G. Fanin, 40, 40127 Bologna, Italy;
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Which Traits of Humic Substances Are Investigated to Improve Their Agronomical Value? Molecules 2021; 26:molecules26030760. [PMID: 33540638 PMCID: PMC7867258 DOI: 10.3390/molecules26030760] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/08/2021] [Accepted: 01/13/2021] [Indexed: 01/08/2023] Open
Abstract
Humic substances (HSs) are chromogenic organic assemblies that are widespread in the environment, including soils, oceans, rivers, and coal-related resources. HSs are known to directly and indirectly stimulate plants based on their versatile organic structures. Their beneficial activities have led to the rapid market growth of agronomical HSs. However, there are still several technical issues and concerns to be addressed to advance sustainable agronomical practices for HSs and allow growers to use HSs reliably. First, it is necessary to elucidate the evident structure (component)–function relationship of HSs. Specifically, the core structural features of HSs corresponding to crop species, treatment method (i.e., soil, foliar, or immersion applications), and soil type-dependent plant stimulatory actions as well as specific plant responses (e.g., root genesis and stress resistance) should be detailed to identify practical crop treatment methodologies. These trials must then be accompanied by means to upgrade crop marketability to help the growers. Second, structural differences of HSs depending on extraction sources should be compared to develop quality control and assurance measures for agronomical uses of HSs. In particular, coal-related HSs obtainable in bulk amounts for large farmland applications should be structurally and functionally distinguishable from other natural HSs. The diversity of organic structures and components in coal-based HSs must thus be examined thoroughly to provide practical information to growers. Overall, there is a consensus amongst researchers that HSs have the potential to enhance soil quality and crop productivity, but appropriate research directions should be explored for growers’ needs and farmland applications.
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Baldi E, Cavani L, Mazzon M, Marzadori C, Quartieri M, Toselli M. Fourteen years of compost application in a commercial nectarine orchard: effect on microelements and potential harmful elements in soil and plants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 752:141894. [PMID: 32896791 DOI: 10.1016/j.scitotenv.2020.141894] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 08/20/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
The objective of this experiment was to valuate, after 14 years, the impact of annual compost applications on micronutrient and potentially toxic trace elements on nectarine tree uptake and soil fertility. The study was performed in the Po valley, Italy, on the variety Stark RedGold (grafted on GF677). Since orchard planting, the following treatments were applied, in a randomized complete block design, with four replicates: 1. unfertilized control; 2. mineral fertilization (N was supplied as NO3NH4 at 70-130 kg ha-1 year-1); 3. compost at 5 t DW ha-1 year-1; 4. compost at 10 t DW ha-1 year-1. The actual rate of application was 12.5 (LOW) and 25 (HIGH) t ha-1, since compost was concentrated in the tree row. Compost was made from domestic organic wastes mixed with pruning material from urban ornamental trees and garden management and stabilized for 3 months. The supply of compost HIGH induced an enrichment of soil total Cu, Zn and Cd, and a decrease of Fe and Co concentration; with values always below the European threshold limits for heavy metals in the soil. In addition, compost (at both rates) increased availability (DTPA-extractable) of Fe, Mn and Zn, Cd, Ni, and Pb in the top soil (0-0.15 m). Total micronutrient and trace element tree content was not affected by fertilization treatments; however, the recycled fraction returned to the soil at the end of the season through abscised leaves and pruned wood of Cu, Fe, Mn and Zn was increased by mineral fertilization; Fe and Zn also by compost HIGH. Our data show that the introduction of compost at both 12.5 and 25 t ha-1 year-1 in the row did not increase the risk of pollution related to potentially toxic trace elements and at the same time increased the bioavailability of Fe, Mn and Zn.
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Affiliation(s)
- Elena Baldi
- Department of Agricultural and Food Sciences, University of Bologna, viale Fanin, 46 40127 Bologna, Italy.
| | - Luciano Cavani
- Department of Agricultural and Food Sciences, University of Bologna, viale Fanin, 46 40127 Bologna, Italy
| | - Martina Mazzon
- Department of Agricultural and Food Sciences, University of Bologna, viale Fanin, 46 40127 Bologna, Italy
| | - Claudio Marzadori
- Department of Agricultural and Food Sciences, University of Bologna, viale Fanin, 46 40127 Bologna, Italy
| | - Maurizio Quartieri
- Department of Agricultural and Food Sciences, University of Bologna, viale Fanin, 46 40127 Bologna, Italy
| | - Moreno Toselli
- Department of Agricultural and Food Sciences, University of Bologna, viale Fanin, 46 40127 Bologna, Italy
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Lurthy T, Pivato B, Lemanceau P, Mazurier S. Importance of the Rhizosphere Microbiota in Iron Biofortification of Plants. FRONTIERS IN PLANT SCIENCE 2021; 12:744445. [PMID: 34925398 PMCID: PMC8679237 DOI: 10.3389/fpls.2021.744445] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 10/29/2021] [Indexed: 05/13/2023]
Abstract
Increasing the iron content of plant products and iron assimilability represents a major issue for human nutrition and health. This is also a major challenge because iron is not readily available for plants in most cultivated soils despite its abundance in the Earth's crust. Iron biofortification is defined as the enhancement of the iron content in edible parts of plants. This biofortification aims to reach the objectives defined by world organizations for human nutrition and health while being environment friendly. A series of options has been proposed to enhance plant iron uptake and fight against hidden hunger, but they all show limitations. The present review addresses the potential of soil microorganisms to promote plant iron nutrition. Increasing knowledge on the plant microbiota and plant-microbe interactions related to the iron dynamics has highlighted a considerable contribution of microorganisms to plant iron uptake and homeostasis. The present overview of the state of the art sheds light on plant iron uptake and homeostasis, and on the contribution of plant-microorganism (plant-microbe and plant-plant-microbe) interactions to plant nutritition. It highlights the effects of microorganisms on the plant iron status and on the co-occurring mechanisms, and shows how this knowledge may be valued through genetic and agronomic approaches. We propose a change of paradigm based on a more holistic approach gathering plant and microbial traits mediating iron uptake. Then, we present the possible applications in plant breeding, based on plant traits mediating plant-microbe interactions involved in plant iron uptake and physiology.
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Assessing the Biostimulant Effects of a Novel Plant-Based Formulation on Tomato Crop. SUSTAINABILITY 2020. [DOI: 10.3390/su12208432] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The aim of this research was to evaluate the biostimulant effects of an eco-product (EP) containing essential oils of rosemary and eucalyptus on tomato crop. Experiments were conducted to evaluate EP effects on plant growth and physiological parameters (e.g., chlorophyll content), total phenols and antioxidant activity, enzyme activities (e.g., catalase), plant macronutrient content and fresh tomato fruit quality. The application of an EP once (EP-1x) increased tomato plant height by 19%, stomatal conductance, and chlorophyll content compared to the control (sprayed with water). EP triplicate (EP-3x) application significantly increased yield (0.79 kg plant−1) compared to the control (0.58 kg plant−1). However, application of EP-3x was associated with a higher percentage of fruit cracking in comparison to the control. Total phenols and antioxidant activity were affected from both the use of EP and application frequency. EP application decreased by 27.3% the leaf damage index in comparison to the control. Nutrient content in leaves (N, Mg) was significantly decreased in the case of EP-3x treatment. Fruit firmness was decreased by 19.9% in the case of EP-1x application. Fruit marketability and tomato-like aroma, fresh weight and soluble solids did not differ among the treatments. Further research is required to examine the potential use of essential oils as biostimulants.
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Hassan A, Salem A, Elghandour M, Abu Hafsa S, Reddy P, Atia S, Vidu L. Humic substances isolated from clay soil may improve the ruminal fermentation, milk yield, and fatty acid profile: A novel approach in dairy cows. Anim Feed Sci Technol 2020. [DOI: 10.1016/j.anifeedsci.2020.114601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Galambos N, Compant S, Moretto M, Sicher C, Puopolo G, Wäckers F, Sessitsch A, Pertot I, Perazzolli M. Humic Acid Enhances the Growth of Tomato Promoted by Endophytic Bacterial Strains Through the Activation of Hormone-, Growth-, and Transcription-Related Processes. FRONTIERS IN PLANT SCIENCE 2020; 11:582267. [PMID: 33042195 PMCID: PMC7524882 DOI: 10.3389/fpls.2020.582267] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 08/31/2020] [Indexed: 06/01/2023]
Abstract
Plant growth-promoting bacteria (PGPB) are promising alternatives in the reduction of the use of chemical fertilizers. Likewise, humic acid (HA) can improve plant growth and/or the establishment of endophytic PGPB. Although the effects of PGPB colonization or HA treatment have been studied separately, little information is available on plant response to the combined applications of PGPB and HA. Thus, the aim of this work was to understand the physiological effects, bacterial colonization and transcriptional responses activated by endophytic bacterial strains in tomato roots and shoots in the absence (control condition) and presence of HA (HA condition). Tomato shoot length was promoted by seed inoculation with Paraburkholderia phytofirmans PsJN, Pantoea agglomerans D7G, or Enterobacter sp. 32A in the presence of HA, indicating a possible complementation of PGPB and HA effects. Tomato colonization by endophytic bacterial strains was comparable in the control and HA condition. The main transcriptional regulations occurred in tomato roots and the majority of differentially expressed genes (DEGs) was upregulated by endophytic bacterial strains in the HA condition. Half of the DEGs was modulated by two or three strains as possible common reactions to endophytic bacterial strains, involving protein metabolism, transcription, transport, signal transduction, and defense. Moreover, strain-specific tomato responses included the upregulation of signal transduction, transcription, hormone metabolism, protein metabolism, secondary metabolism, and defense processes, highlighting specific traits of the endophyte-tomato interaction. The presence of HA enhanced the upregulation of genes related to signal transduction, hormone metabolism, transcription, protein metabolism, transport, defense, and growth-related processes in terms of number of involved genes and fold change values. This study provides detailed information on HA-dependent enhancement of growth-related processes stimulated by endophytic bacterial strains in tomato plants and reports the optimized dosages, complementation properties and gene markers for the further development of efficient PGPB- and HA-based biostimulants.
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Affiliation(s)
- Nikoletta Galambos
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
- Biobest NV, Westerlo, Belgium
| | - Stéphane Compant
- Center for Health and Bioresources, AIT Austrian Institute of Technology, Tulln, Austria
| | - Marco Moretto
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
| | - Carmela Sicher
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
| | - Gerardo Puopolo
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
- Center Agriculture Food Environment (C3A), University of Trento, San Michele all’Adige, Italy
| | | | - Angela Sessitsch
- Center for Health and Bioresources, AIT Austrian Institute of Technology, Tulln, Austria
| | - Ilaria Pertot
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
- Center Agriculture Food Environment (C3A), University of Trento, San Michele all’Adige, Italy
| | - Michele Perazzolli
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
- Center Agriculture Food Environment (C3A), University of Trento, San Michele all’Adige, Italy
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Latif U, Farid M, Rizwan M, Ishaq HK, Farid S, Ali S, El-Sheikh MA, Alyemeni MN, Wijaya L. Physiological and Biochemical Response of Alternanthera bettzickiana (Regel) G. Nicholson under Acetic Acid Assisted Phytoextraction of Lead. PLANTS 2020; 9:plants9091084. [PMID: 32846952 PMCID: PMC7570330 DOI: 10.3390/plants9091084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 01/24/2023]
Abstract
Heavy metals (HMs) stress causes severe damage to physiology and biochemistry of plant species leading to stunted growth and low yield. Phytoremediation via phytoextraction, a viable low-cost and environment-friendly alternative to other techniques that are often too expensive, impractical and hazardous. However, phytoextraction potential, physiological and biochemical response of various plant species against HMs stress is not fully understood. Among other HMs, lead (Pb) is an inorganic pollutant with deleterious biotic effects. Bioavailability and mobility of the Pb can be enhanced by addition of organic acids. A pot scale experiment was done to assess the effects of Pb on Alternanthera bettzickiana (Regel) G. Nicholson and its ability to accumulate Pb with or without acetic acid (AA). The Results showed that Pb caused significant damage in A. bettzickiana, and its ecotoxicity was evident from increased levels of lipid peroxidation up to 107% under Pb stress. The significant decrease in plant height (32%), root length (21%), leaf area (38%) and number of leaves per plant (46%) was observed. On the other hand, application of AA to Pb stressed plants reduced the oxidative damage by further enhancing the activities of ascorbate peroxidase (APX) and catalases (CAT) up to 16% and 21% respectively. Moreover, addition of AA significantly improved plant total chlorophylls (15%) and carotenoids (50%). The application of AA also promoted Pb accumulation in leaf, stem and roots up to 70%, 65% and 66% respectively. This research concluded that AA has the ability to enhance the phytoextraction of Pb and support the plant growth and physiology under Pb stress condition.
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Affiliation(s)
- Urousa Latif
- Department of Environmental Sciences, University of Gujrat, Hafiz Hayat Campus, Gujrat 50700, Pakistan; (U.L.); (M.F.); (H.K.I.)
| | - Mujahid Farid
- Department of Environmental Sciences, University of Gujrat, Hafiz Hayat Campus, Gujrat 50700, Pakistan; (U.L.); (M.F.); (H.K.I.)
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad 38000, Pakistan; (M.R.); (S.F.)
| | - Hafiz Khuzama Ishaq
- Department of Environmental Sciences, University of Gujrat, Hafiz Hayat Campus, Gujrat 50700, Pakistan; (U.L.); (M.F.); (H.K.I.)
| | - Sheharyaar Farid
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad 38000, Pakistan; (M.R.); (S.F.)
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad 38000, Pakistan; (M.R.); (S.F.)
- Department of Biological Sciences and Technology, China Medical University, Taichung 40402, Taiwan
- Correspondence: or
| | - Mohamed A. El-Sheikh
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.E.-S.); (M.N.A.); (L.W.)
| | - Mohammed Nasser Alyemeni
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.E.-S.); (M.N.A.); (L.W.)
| | - Leonard Wijaya
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.E.-S.); (M.N.A.); (L.W.)
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Pizzeghello D, Schiavon M, Francioso O, Dalla Vecchia F, Ertani A, Nardi S. Bioactivity of Size-Fractionated and Unfractionated Humic Substances From Two Forest Soils and Comparative Effects on N and S Metabolism, Nutrition, and Root Anatomy of Allium sativum L. FRONTIERS IN PLANT SCIENCE 2020; 11:1203. [PMID: 32922415 PMCID: PMC7457123 DOI: 10.3389/fpls.2020.01203] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/24/2020] [Indexed: 05/03/2023]
Abstract
Humic substances (HS) are powerful natural plant biostimulants. However, there is still a lack of knowledge about the relationship between their structure and bioactivity in plants. We extracted HS (THE1-2) from two forest soils covered with Pinus mugo (1) or Pinus sylvestris (2). The extracts were subjected to weak acid treatment to produce size-fractionated HS (high molecular size, HMS1-2; low molecular size, LMS1-2). HS were characterized for total acidity, functional groups, element and auxin (IAA) contents, and hormone-like activity. HS concentrations ranging from 0 to 5 mg C L-1 were applied to garlic (Allium sativum L.) plantlets in hydroponics to ascertain differences between unfractionated and size-fractionated HS in the capacity to promote mineral nutrition, root growth and cell differentiation, activity of enzymes related to plant development (invertase, peroxidase, and esterase), and N (nitrate reductase, glutamine synthetase) and S (O-acetylserine sulphydrylase) assimilation into amino acids. A positive linear dose-response relationship was determined for all HS in the range 0-1 mg C L-1, while higher HS doses were less effective or ineffective in promoting physiological-biochemical attributes of garlic. Bioactivity was higher for size-fractionated HS according to the trend LMS1-2>HMS1-2>THE1-2, with LMS2 and HMS2 being overall more bioactive than LMS1 and HMS1, respectively. LMS1-2 contained more N, oxygenated functional groups and IAA compared to THE1-2 and HMS1-2. Also, they exhibited higher hormone-like activities. Such chemical properties likely accounted for the greater biostimulant action of LMS1-2. Beside plant growth, nutrition and N metabolism, HS stimulated S assimilation by promoting the enrichment of garlic plantlets with the S amino acid alliin, which has recognized beneficial properties in human health. Concluding, this study endorses that i) treating THE with a weak acid produced sized-fractionated HS with higher bioactivity and differing in properties, perhaps because of novel molecular arrangements of HS components that better interacted with garlic roots; ii) LMS from forest soils covered with P. mugo or P. sylvestris were the most bioactive; iii) the cover vegetation affected HS bioactivity iv); HS stimulated N and S metabolism with relevant benefits to crop nutritional quality.
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Affiliation(s)
- Diego Pizzeghello
- Dipartimento di Agronomia, Animali, Alimenti, Risorse naturali e Ambiente, Università degli Studi di Padova, Legnaro, Italy
| | - Michela Schiavon
- Dipartimento di Agronomia, Animali, Alimenti, Risorse naturali e Ambiente, Università degli Studi di Padova, Legnaro, Italy
| | - Ornella Francioso
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Università di Bologna, Bologna, Italy
| | | | - Andrea Ertani
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università di Torino, Torino, Italy
| | - Serenella Nardi
- Dipartimento di Agronomia, Animali, Alimenti, Risorse naturali e Ambiente, Università degli Studi di Padova, Legnaro, Italy
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Yoon HY, Jeong HJ, Cha JY, Choi M, Jang KS, Kim WY, Kim MG, Jeon JR. Structural variation of humic-like substances and its impact on plant stimulation: Implication for structure-function relationship of soil organic matters. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 725:138409. [PMID: 32464747 DOI: 10.1016/j.scitotenv.2020.138409] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/30/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Here, five aromatic monomers, one bearing a long alkyl chain [3-pentadecylphenol (3-PP)], the second bearing a polycyclic aromatic hydrocarbon [dihydroxynaphthalene (DHN)], the third bearing an organic amine [l-3,4-dihydroxyphenylalanine (l-DOPA)], the fourth bearing a carboxylic acid [vanillic acid (VA)], and the fifth bearing a phenol [catechol (CA)] were oxidatively coupled to produce four humic-like substances (3-PP, DHN, l-DOPA, and CAVA products) to mimic the diverse organic architectures of natural humus. Analysis using several methods, including SEM, EPR, elemental analysis, FT-IR-ATR, 13C NMR and anti-oxidant capability, revealed that each of the monomeric structures was well incorporated into the corresponding humic-like substances. Seed germination acceleration and NaCl-involved abiotic stress resistance of Arabidopsis thaliana were then tested to determine whether the different structures resulted in different levels of plant stimulation. The l-DOPA, CAVA and DHN-based materials showed enhanced stimulatory activities compared with no treatment, whereas the effects of the 3-PP-based materials were meager. Interestingly, high-resolution (15 T) ESI FT-ICR mass spectrometry-based van Krevelen diagrams clearly showed that the presence of molecules with H/C and O/C ratios ranging from 0.5 to 1.0 and 0.2 to 0.4, respectively, could be connected with such biological actions. Here, the l-DOPA sample showed the highest content of such molecules, followed by the CAVA, DHN and 3-PP samples. Next, the ability of l-DOPA and CAVA products to induce resistance in A. thaliana to a pathogen-related biotic stress was tested to confirm whether the proposed molecular features are associated with multi-stimulatory actions on plants. The expression level of pathogenesis-related protein 1 and inspection of plant morphology clearly revealed that both the l-DOPA and CAVA products stimulate plants to respond to biotic stresses. Size-exclusion chromatography together with NMR and IR data of both the materials strongly suggests that lignin-like supramolecular assemblages play an important role in versatile biological activities of humus.
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Affiliation(s)
- Ho Young Yoon
- Department of Agricultural Chemistry and Food Science & Technology, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Hae Jin Jeong
- Department of Agricultural Chemistry and Food Science & Technology, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Joon-Yung Cha
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Mira Choi
- Bio-Chemical Analysis Group, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
| | - Kyoung-Soon Jang
- Bio-Chemical Analysis Group, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
| | - Woe-Yeon Kim
- Department of Agricultural Chemistry and Food Science & Technology, Gyeongsang National University, Jinju 52828, Republic of Korea; Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Republic of Korea; PMBBRC, Gyeongsang National University, Jinju 52828, Republic of Korea; IALS, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Min Gab Kim
- College of Pharmacy and Research Institute of Pharmaceutical Science, Gyeongsang National University, Jinju 52828, Republic of Korea; PMBBRC, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jong-Rok Jeon
- Department of Agricultural Chemistry and Food Science & Technology, Gyeongsang National University, Jinju 52828, Republic of Korea; IALS, Gyeongsang National University, Jinju 52828, Republic of Korea.
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Lucini L, Miras-Moreno B, Rouphael Y, Cardarelli M, Colla G. Combining Molecular Weight Fractionation and Metabolomics to Elucidate the Bioactivity of Vegetal Protein Hydrolysates in Tomato Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:976. [PMID: 32695133 PMCID: PMC7338714 DOI: 10.3389/fpls.2020.00976] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 06/16/2020] [Indexed: 05/24/2023]
Abstract
The comprehension of the bioactive fractions involved in the biostimulant activity of plant derived protein hydrolysates (PH) is a complex task, but it can also lead to significant improvements in the production of more effective plant biostimulants. The aim of this work is to shed light onto the bioactivity of different PH dialysis fractions (PH1 < 0.5-1 kDa; PH2 > 0.5-1 kDa; PH3 < 8-10 kDa; PH4 > 8-10 kDa) of a commercial PH-based biostimulant through a combined in vivo bioassay and metabolomics approach. A first tomato rooting bioassay investigated the auxin-like activity of PH and its fractions, each of them at three nitrogen levels (3, 30, and 300 mg L-1 of N) in comparison with a negative control (water) and a positive control (indole-3-butyric acid, IBA). Thereafter, a second experiment was carried out where metabolomics was applied to elucidate the biochemical changes imposed by the PH and its best performing fraction (both at 300 mg L-1 of N) in comparison to water and IBA. Overall, both the PH and its fractions increased the root length of tomato cuttings, compared to negative control. Moreover, the highest root length was obtained in the treatment PH1 following foliar application. Metabolomics allowed highlighting a response to PH1 that involved changes at phytohormones and secondary metabolite level. Notably, such metabolic reprogramming supported the effect on rooting of tomato cuttings, being shared with the response induced by the positive control IBA. Taken together, the outcome of in vivo assays and metabolomics indicate an auxin-like activity of the selected PH1 fraction.
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Affiliation(s)
- Luigi Lucini
- Department for Sustainable Food Process, Research Centre for Nutrigenomics and Proteomics, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Begoña Miras-Moreno
- Council for Agricultural Research and Economics—Research Centre for Genomics and Bioinformatics (CREA-GB), Fiorenzuola d'Arda, Italy
| | - Youssef Rouphael
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Mariateresa Cardarelli
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria, Centro di ricerca Orticoltura e Florovivaismo, Pontecagnano Faiano, Italy
| | - Giuseppe Colla
- Department of Agriculture and Forest Sciences, University of Tuscia, Viterbo, Italy
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De Hita D, Fuentes M, Zamarreño AM, Ruiz Y, Garcia-Mina JM. Culturable Bacterial Endophytes From Sedimentary Humic Acid-Treated Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:837. [PMID: 32636861 PMCID: PMC7316998 DOI: 10.3389/fpls.2020.00837] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 05/25/2020] [Indexed: 05/14/2023]
Abstract
The global decrease in soil fertility leads to a new agricultural scenario where eco-friendly solutions play an important role. The plant growth promotion through the use of microbes, especially endophytes and rhizosphere microbiota, has been proposed as a useful solution. Several studies have shown that humic substances are suitable vehicles for the inoculation of plant growth promoting bacteria, and that this combination has an enhanced effect on the stimulation of plant development. In this work, cucumber plants grown hydroponically have been pre-treated with a sedimentary humic acid (SHA) with known plant growth-enhancing effects, and culturable bacterial endophytes have been isolated from these plants. The hypothesis was that this pre-treatment with SHA could lead to the isolation of certain endophytic taxa whose proliferation within the plant could have been promoted as a result of the effects of the treatment with SHA, and that could eventually reinforce a potential synergistic effect of a combined application of those endophytic bacteria and SHA. The culturable endophytes that have been isolated from humic acid-treated cucumber plants have been identified as members of four main phyla: Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes. Isolates were characterized according to the following plant growth-promoting traits: nitrogen fixation/scavenging, phosphate solubilization, siderophore production and plant hormone production. Most of the isolates were able to fix/scavenge nitrogen and to produce plant hormones (indole-3-acetic acid and several cytokinins), whereas few isolates were able to solubilize phosphate and/or produce siderophores. The most promising endophyte isolates for its use in futures investigations as plant growth-promoting bacterial inocula were Pseudomonas sp. strains (that showed all traits), Sphingomonas sp., Stenotrophomonas sp. strains, or some Arthrobacter sp. and Microbacterium sp. isolates.
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Affiliation(s)
- David De Hita
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Marta Fuentes
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Angel M. Zamarreño
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Yaiza Ruiz
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Jose M. Garcia-Mina
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
- Centre Mondial de I’lnnovation (CMI) – Groupe Roullier, Saint-Malo, France
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Interaction between Humic Substances and Plant Hormones for Phosphorous Acquisition. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10050640] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Phosphorus (P) deficiency is a major constraint in highly weathered tropical soils. Although phosphorous rock reserves may last for several hundred years, there exists an urgent need to research efficient P management for sustainable agriculture. Plant hormones play an important role in regulating plant growth, development, and reproduction. Humic substances (HS) are not only considered an essential component of soil organic carbon (SOC), but also well known as a biostimulant which can perform phytohormone-like activities to induce nutrient uptake. This review paper presents an overview of the scientific outputs in the relationship between HS and plant hormones. Special attention will be paid to the interaction between HS and plant hormones for nutrient uptake under P-deficient conditions.
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50
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De Hita D, Fuentes M, Fernández V, Zamarreño AM, Olaetxea M, García-Mina JM. Discriminating the Short-Term Action of Root and Foliar Application of Humic Acids on Plant Growth: Emerging Role of Jasmonic Acid. FRONTIERS IN PLANT SCIENCE 2020; 11:493. [PMID: 32411165 PMCID: PMC7199506 DOI: 10.3389/fpls.2020.00493] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/01/2020] [Indexed: 05/24/2023]
Abstract
Humic substances (HS, fulvic and humic acids) are widely used as fertilizers or plant growth stimulants, although their mechanism of action still remains partially unknown. Humic substances may be applied either directly to the soil or as foliar sprays. Despite both kind of application are commonly used in agricultural practices, most of the studies regarding the elicited response in plants induced by HS are based on the root-application of these substances. The present work aimed at discriminating between the mechanisms of action of foliar application versus root application of a sedimentary humic acid (SHA) on plant development. For this purpose, six markers related to plant phenotype, plant morphology, hormonal balance and root-plasma membrane H+-ATPase were selected. Both application strategies improved the shoot and root growth. Foliar applied- and root applied-SHA shared the capacity to increase the concentration of indole-3-acetic acid in roots and cytokinins in shoots. However, foliar application did not lead to short-term increases in either abscisic acid root-concentration or root-plasma membrane H+-ATPase activity which are, however, two crucial effects triggered by SHA root-application. Both application modes increased the root concentrations of jasmonic acid and jasmonoyl-isoleucine. These hormonal changes caused by foliar application could be a stress-related symptom and connected to the loss of leaves trichomes and the diminution of chloroplasts size seen by scanning electron microscopy. These results support the hypothesis that the beneficial effects of SHA applied to roots or leaves may result from plant adaptation to a mild transient stress caused by SHA application.
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Affiliation(s)
- David De Hita
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Marta Fuentes
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Victoria Fernández
- Forest Genetics and Ecophysiology Research Group, School of Forest Engineering, Technical University of Madrid, Madrid, Spain
| | - Angel M. Zamarreño
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Maite Olaetxea
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Jose M. García-Mina
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
- Centre Mondial de I’lnnovation Roullier, Saint-Malo, France
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