Connecting Bio-Priming Approach with Integrated Nutrient Management for Improved Nutrient Use Efficiency in Crop Species

Sarkar, Deepranjan; Rakshit, Amitava; Alturki, Ahmad; Sayyed, R. Z.; Datta, Rahul

doi:10.3390/agriculture11040372

Cited by 40 publications

(20 citation statements)

References 86 publications

(95 reference statements)

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“…The amount of mineral fertilizer for crop production has increased annually. However, the average recovery efficiencies range from 20% to 50%, depending on the nutrient ( Sarkar et al, 2021 ). Some recent studies have shown improved nutrient use efficiency due to microbial inoculation of plants ( Adesemoye and Kloepper, 2009 ; Abo-Kora, 2016 ; Paungfoo-Lonhienne et al, 2019 ; Pereira et al, 2020 ; Sarkar et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…However, the average recovery efficiencies range from 20% to 50%, depending on the nutrient ( Sarkar et al, 2021 ). Some recent studies have shown improved nutrient use efficiency due to microbial inoculation of plants ( Adesemoye and Kloepper, 2009 ; Abo-Kora, 2016 ; Paungfoo-Lonhienne et al, 2019 ; Pereira et al, 2020 ; Sarkar et al, 2021 ). However, these studies did not evaluate the effect of high inoculum concentrations on plant growth.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Chemical Fertilization and Microbial Inoculum on Bacillus subtilis Colonization in Soybean and Maize Plants

Bueno

Santos

Buzo³

et al. 2022

Front. Microbiol.

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Plant growth-promoting endophytic microorganisms in agriculture have been expanding in Brazil and are an excellent strategy to face the challenges of current agriculture, such as reducing production costs with fewer environmental impacts, without detriment to productivity. However, little is known about the factors that can affect the colonization of endophytic such as inoculant concentration and mineral fertilization. The present study aimed to evaluate the influence of these factors on soybean and maize crops and found that for soybean crops, the highest Bacillus subtilis concentration of 1 × 104 and 1 × 1010 CFU ml−1 promoted the highest number of recovered bacteria, when there was no mineral fertilization. However, mineral fertilization limited the number of recovered bacteria, suggesting that mineral fertilization interferes with endophytic colonization. For maize crops, the highest number of recovered bacteria occurred from the concentration of 1 × 106 CFU ml−1, not differing from the highest concentrations. A mineral fertilization dose of 25% promoted the greatest B. subtilis recovery compared to the other treatments. Regarding plant development, the highest microbial inoculum concentrations did not necessarily promote greater positive growth promotion effects compared to the concentration of 1 × 104 CFU ml−1 for both crops. The results also suggest that the higher number of endophytic bacteria recovered in the plant does not necessarily affect plant growth in the same proportion. For soybean plants, there is a strong tendency that with the increase in the B. subtilis inoculant concentration, the need for mineral fertilization doses to achieve the same plant development is consequently increased, and inoculations with 1 × 105 and 1 × 106 CFU ml−1 with fertilization doses between 44% and 62% are the ideal combinations for greater plant development. In maize plants, the best growth promotion response (height) was obtained using inoculation concentration of 1 × 102 and 1 × 1010 CFU ml−1, increasing according to the increase in fertilization doses. The findings suggest, for soybean crop, that these high inoculum concentrations required more photosynthetic metabolites from the plants and more nutrients from the soil. Thus, the need for mineral fertilization for plant growth must be increased.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effects of Chemical Fertilization and Microbial Inoculum on Bacillus subtilis Colonization in Soybean and Maize Plants

Bueno

Santos

Buzo³

et al. 2022

Front. Microbiol.

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“…nutrient supply, atmospheric conditions, and competitiveness with other components of these communities [50]. In roots, carbon exudates are released which act as a nutrient source, as well as chemo-attractant, for bacteria, and are responsible for the colonization of endophytes inside the plant [46,[51][52][53]. Moreover, higher bacterial diversity in the upper part as compared to the middle part of the shoot might have originated from aerial colonization in the plants [54].…”

Section: Discussionmentioning

confidence: 99%

Exploring Functional Diversity and Community Structure of Diazotrophic Endophytic Bacteria Associated with Pennisetum glaucum Growing under Field in a Semi-Arid Region

Gupta

Paul

Singh

et al. 2022

Land

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Diazotrophic endophytic bacteria (DEB) are the key drivers of nitrogen fixation in rainfed soil ecosystems and, hence, can influence the growth and yield of crop plants. Therefore, the present work investigated the structure and composition of the DEB community at different growth stages of field-grown pearl millet plants, employing the cultivation-dependent method. Diazotrophy of the bacterial isolates was confirmed by acetylene reduction assay and amplification of the nifH gene. ERIC-PCR-based DNA fingerprinting, followed by 16S rRNA gene analysis of isolates recovered at different time intervals, demonstrated the highest bacterial diversity during early (up to 28 DAS (Days after sowing)) and late (63 DAS onwards) stages, as compared to the vegetative growth stage (28–56 DAS). Among all species, Pseudomonas aeruginosa was the most dominant endophyte. Assuming modulation of the immune response as one of the tactics for successful colonization of P. aeruginosa PM389, we studied the expression of the profile of defense genes of wheat, used as a host plant, in response to P. aeruginosa inoculation. Most of the pathogenesis-related PR genes were induced initially (at 6 h after infection (HAI)), followed by their downregulation at 12 HAI. The trend of bacterial colonization was quantified by qPCR of 16S rRNAs. The results obtained in the present study indicated an attenuated defense response in host plants towards endophytic bacteria, which is an important feature that helps endophytes establish themselves inside the endosphere of roots.

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“…Among agricultural crops, nutrient efficiency use is less than 50% in most agricultural regions (Baligar et al, 2001). Factors such as energy crises and reduction of nutrient efficiency form a great challenge for modern agriculture (Sarkar et al, 2021b). Some studies have demonstrated that the consumption of fossil fuels, changes in the climate scenario, soil degradation, and food security have resulted in a cyclical degradation process of natural resources, low productivity, and low nutrient efficiency use (Rakshit, 2019).…”

Section: Nutrient Use E Ciencymentioning

confidence: 99%

The bacterial world inside the plant

Santos

Desoignies²,

Rigobelo³

2022

Front. Sustain. Food Syst.

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Sustainable agriculture requires the recruitment of bacterial agents to reduce the demand for mineral fertilizers and pesticides such as bacterial endophytes. Bacterial endophytes represent a potential alternative to the widespread use of synthetic fertilizers and pesticides in conventional agriculture practices. Endophytes are formed by complex microbial communities and microorganisms that colonize the plant interior for at least part of their life. Their functions range from mutualism to pathogenicity. Bacterial endophytes colonize plant tissues, and their composition and diversity depend on many factors, including the plant organ, physiological conditions, plant growth stage, and environmental conditions. The presence of endophytes influences several vital activities of the host plant. They can promote plant growth, elicit a defense response against pathogen attack, and lessen abiotic stress. Despite their potential, especially with regard to crop production and environmental sustainability, research remains sparse. This review provides an overview of the current research, including the concept of endophytes, endophytes in plant organs, endophyte colonization, nutrient efficiency use, endophytes and crop nutrition, inoculation with synergistic bacteria, the effect of inoculum concentration on plant root microbiota and synthetic communities. It also examines the practical opportunities and challenges when utilizing endophytes in the field of sustainable agriculture. Finally, it explores the importance of these associations with regard to the future of agriculture and the environment.

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Connecting Bio-Priming Approach with Integrated Nutrient Management for Improved Nutrient Use Efficiency in Crop Species

Cited by 40 publications

References 86 publications

Effects of Chemical Fertilization and Microbial Inoculum on Bacillus subtilis Colonization in Soybean and Maize Plants

Effects of Chemical Fertilization and Microbial Inoculum on Bacillus subtilis Colonization in Soybean and Maize Plants

Exploring Functional Diversity and Community Structure of Diazotrophic Endophytic Bacteria Associated with Pennisetum glaucum Growing under Field in a Semi-Arid Region

The bacterial world inside the plant

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