K-humate as an agricultural alternative to increase nodulation of soybeans inoculated with Bradyrhizobium

Silva, Maura Santos Reis de Andrade da; Santos, Bianca de Melo Silveira dos; Chávez, Davy William Hidalgo; Oliveira, Reginaldo de; Santos, Carlos Henrique Barbosa; Oliveira, Eli Carlos de; Rigobelo, Everlon Cid

doi:10.1016/j.bcab.2021.102129

Cited by 8 publications

(10 citation statements)

References 41 publications

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“…This same work isolated the effect of K on these parameters, stating that the gains obtained came from HSs (Valdrighi et al, 1996). In addition, HSs appear to increase the survival of rhizobia in soybean seeds (Figure 1) (da Silva et al, 2021a), to protect bacteria against irradiation (Bitton et al, 1972), and to increase the viability of the inoculant during storage when applied together with alginate (Young et al, 2006). These characteristics indicate that in addition to improving communication between microorganisms and plants, this combination can protect the inoculant against harmful effects of the environment (Table 1 and Figure 2).…”

Section: Promoting Plant Growth By Humic Substances and Plant Growth-promoting Bacteriamentioning

confidence: 77%

“…The application of K-humate and Bradyrhizobium to soybean seeds was found to result in morphological changes in plant roots compared with the inoculated control (Figure 1). In a greenhouse experiment, better values were observed for nodulation and N increase in the shoots of plants inoculated with Bradyrhizobium with 50 mg/L K-humate via seeds than in shoots of plants inoculated only with the control (da Silva et al, 2021a). The application of K-humate to chicory generated gains in plant growth and variations in the number of bacterial autotrophic and heterotrophic nitrifiers in the soil.…”

Section: Promoting Plant Growth By Humic Substances and Plant Growth-promoting Bacteriamentioning

confidence: 94%

“…These substances would provide an increase in bacterial interaction with the plant host, coupled with protection by the inoculant in the hydrophobic domains of HSs. It was observed that after 25 days of contact with the seed, the greatest bacterial survival occurred in the treatment that received HSs (da Silva et al, 2021a). The structural composition of humified organic matter allows adsorption on roots.…”

Section: De Haan 1974mentioning

confidence: 99%

“…Physiological changes caused by PGPB and HSs may justify changes in the root exudation profile. The application of H. seropedicae and HA altered the composition of root exudates in maize, promoting an increase in the amount and variety of nitrogen compounds (da Silva Lima et al, 2014). Puglisi et al (2008Puglisi et al ( , 2009 showed that HSs affected the deposition of C by the roots of maize, also resulting in a change in the microbial community of the rhizosphere.…”

Section: De Haan 1974mentioning

confidence: 99%

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Humic Substances in Combination With Plant Growth-Promoting Bacteria as an Alternative for Sustainable Agriculture

et al. 2021

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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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Section: Promoting Plant Growth By Humic Substances and Plant Growth-promoting Bacteriamentioning

confidence: 77%

Section: Promoting Plant Growth By Humic Substances and Plant Growth-promoting Bacteriamentioning

confidence: 94%

Section: De Haan 1974mentioning

confidence: 99%

Section: De Haan 1974mentioning

confidence: 99%

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Humic Substances in Combination With Plant Growth-Promoting Bacteria as an Alternative for Sustainable Agriculture

et al. 2021

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“…It has been reported that humic acids could improve the nodule number, nitrogen fixation efficiency, and promote growth in leguminous plants. , Few studies have reported on how humic acids might increase the number of nodules in legumes. Guo Gao et al found that nitrogen fixation-related genes were upregulated with WSHM treatment and speculated that these results may be related to the flavonoid analogues in WSHM.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic and Metabolomic Analysis of Soybean Nodule Number Improvements with the Use of Water-Soluble Humic Materials

Zhang

Hou

Zhang

et al. 2022

J. Agric. Food Chem.

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Water-soluble humic materials (WSHMs) can enhance the nodule numbers of soybean plants. In this study, targeted metabolomics and transcriptomics were used to understand this mechanism. Results showed that 500 mg/L WSHM increased the adsorption and colonization of rhizobia in soybean roots. High-performance liquid chromatography and targeted metabolomics showed that WSHMs could regulate the content and distribution of endogenous hormones of soybean plants at the initial stage of soybean nodulation. Transcriptomic analysis showed a total of 2406 differentially expressed genes (DEGs) by the 25th day, accounting for 4.89% of total annotation genes (49159). These DEGs were found to contribute primarily to the MAPK signaling pathway, glycolysis/gluconeogenesis, and plant hormone signal transduction according to the −log 10 (Padjust) value in the KEGG pathway. Subsequently, DEGs related to these hormones were selected for verification using quantity-PCR. The WSHM increased the number of nodules by regulating the expression of endogenous hormones in soybean plants.

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Applications of humic and fulvic acid under saline soil conditions to improve growth and yield in barley

Alsudays,

Alshammary,

Alabdallah

et al. 2024

BMC Plant Biol

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Background Enriching the soil with organic matter such as humic and fulvic acid to increase its content available nutrients, improves the chemical properties of the soil and increases plant growth as well as grain yield. In this study, we conducted a field experiment using humic acid (HA), fulvic acid (FA) and recommended dose (RDP) of phosphorus fertilizer to treat Hordeum vulgare seedling, in which four concentrations from HA, FA and RDP (0.0 %, 50 %, 75 % and 100%) under saline soil conditions . Moreover, some agronomic traits (e.g. grain yield, straw yield, spikes weight, plant height, spike length and spike weight) in barley seedling after treated with different concentrations from HA, FA and RDP were determined. As such the beneficial effects of these combinations to improve plant growth, N, P, and K uptake, grain yield, and its components under salinity stress were assessed. Results The findings showed that the treatments HA + 100% RDP (T1), HA + 75% RDP (T2), FA + 100% RDP (T5), HA + 50% RDP (T3), and FA + 75% RDP (T6), improved number of spikes/plant, 1000-grain weight, grain yield/ha, harvest index, the amount of uptake of nitrogen (N), phosphorous (P) and potassium (K) in straw and grain. The increase for grain yield over the control was 64.69, 56.77, 49.83, 49.17, and 44.22% in the first season, and 64.08, 56.63, 49.19, 48.87, and 43.69% in the second season,. Meanwhile, the increase for grain yield when compared to the recommended dose was 22.30, 16.42, 11.27, 10.78, and 7.11% in the first season, and 22.17, 16.63, 11.08, 10.84, and 6.99% in the second season. Therefore, under salinity conditions the best results were obtained when, in addition to phosphate fertilizer, the soil was treated with humic acid or foliar application the plants with fulvic acid under one of the following treatments: HA + 100% RDP (T1), HA + 75% RDP (T2), FA + 100% RDP (T5), HA + 50% RDP (T3), and FA + 75% RDP (T6). Conclusions The result of the use of organic amendments was an increase in the tolerance of barley plant to salinity stress, which was evident from the improvement in the different traits that occurred after the treatment using treatments that included organic amendments (humic acid or fulvic acid).

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K-humate as an agricultural alternative to increase nodulation of soybeans inoculated with Bradyrhizobium

Cited by 8 publications

References 41 publications

Humic Substances in Combination With Plant Growth-Promoting Bacteria as an Alternative for Sustainable Agriculture

Humic Substances in Combination With Plant Growth-Promoting Bacteria as an Alternative for Sustainable Agriculture

Transcriptomic and Metabolomic Analysis of Soybean Nodule Number Improvements with the Use of Water-Soluble Humic Materials

Applications of humic and fulvic acid under saline soil conditions to improve growth and yield in barley

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