Exploring the functional significance of novel cellulolytic bacteria for the anaerobic digestion of rice straw

Kumar, Vikas; Rawat, Jyoti; Patil, Ravichandra C.; Barik, Chitta Ranjan; Purohit, Sukumar; Jaiswal, Haardik; Fartyal, Nishchal; Goud, Vaibhav V.; Kalamdhad, Ajay S.

doi:10.1016/j.renene.2021.01.002

Cited by 16 publications

(7 citation statements)

References 54 publications

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“…This may be a result of removal with more hemicellulose, lignin and silica, which caused the CrI increase. 43 This confirms that hemicellulose, lignin and silica were amorphous. 46,47 However, different results were also observed indicating that the CrI of RS was decreased after fungi treatments.…”

Section: The Growth Characteristics Of B Cereus W118 the Growth Of B ...supporting

confidence: 60%

“…The peaks of the residual RS under 20 °C showed an obviously decreased transmission, primarily comprising a reduction derived from aliphatic compounds in RS carbohydrates and waxes. 45 Comparable results were observed by Kumar et al 43 after bacterial treatment.…”

Section: The Growth Characteristics Of B Cereus W118 the Growth Of B ...mentioning

confidence: 71%

“…[40][41][42] FTIR analysis helps with the examination of chemical bonds and structural components in the biomass. 43 The FTIR spectra of the residual RS degraded by B. cereus W118 at a temperature of 20 °C for 14 days are shown in Fig. 5(b).…”

Section: The Growth Characteristics Of B Cereus W118 the Growth Of B ...mentioning

confidence: 99%

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Efficient degradation of rice straw through a novel psychrotolerant Bacillus cereus at low temperature

Wang

Cai

2022

J Sci Food Agric

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BACKGROUND: Rice straw (RS) is one of the largest sources of lignocellulosic, which is an abundant raw material for biofuels and chemicals. However, the natural degradation of RS under a low temperature environment is the biggest obstacle to returning straw to the field. RESULTS:In the present study, one bacillus strain W118 was isolated. Strain W118 was identified as Bacillus cereus through morphological and physiological characterization and 16S rDNA sequencing. The optimum growth temperature and pH of strain W118 were 20 °C and 6.5, respectively. Simultaneously, it was found that the strain W118 grew well at low temperature, even at a temperature of 4 °C (OD 600 = 1.40 ± 0.01). The decrease of various compositions of RS after the fermentation process at a temperature of 20 °C and 4 °C for 14 days was 27.00 ± 0.02% and 23.70 ± 0.04%, respectively. The composition of RS decreased to 50.71 ± 0.02% after being fermented at 4 °C for 25 days. The results of scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction of RS showed that the compositions of RS were significant decreased.CONCLUSION: This test suggests that the strain W118 is efficient for degrading RS at low temperature, which has great application potential for straw degradation in a low temperature area.

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Section: The Growth Characteristics Of B Cereus W118 the Growth Of B ...supporting

confidence: 60%

Section: The Growth Characteristics Of B Cereus W118 the Growth Of B ...mentioning

confidence: 71%

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Efficient degradation of rice straw through a novel psychrotolerant Bacillus cereus at low temperature

Wang

Cai

2022

J Sci Food Agric

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“…The microbial consortia in herbivore digestive tracts have co-evolved with their hosts. They convert lignocellulose hydrolysates into short-chain fatty acids (SCFAs) and play vital roles in host digestion (Kumar et al, 2021 ), health (Shreiner et al, 2015 ), immunity (Zhang et al, 2015 ), and adaptability (Ley et al, 2008 ). Advances in sequencing technology over the past decade have provided novel insights into microbiome co-evolution and adaptability.…”

Section: Introductionmentioning

confidence: 99%

The Gut Microbiota Determines the High-Altitude Adaptability of Tibetan Wild Asses (Equus kiang) in Qinghai-Tibet Plateau

Liu

Han²,

Zhao

et al. 2022

Front. Microbiol.

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It was acknowledged long ago that microorganisms have played critical roles in animal evolution. Tibetan wild asses (TWA, Equus kiang) are the only wild perissodactyls on the Qinghai-Tibet Plateau (QTP) and the first national protected animals; however, knowledge about the relationships between their gut microbiota and the host's adaptability remains poorly understood. Herein, 16S rRNA and meta-genomic sequencing approaches were employed to investigate the gut microbiota–host associations in TWA and were compared against those of the co-resident livestock of yak (Bos grunnies) and Tibetan sheep (Ovis aries). Results revealed that the gut microbiota of yak and Tibetan sheep underwent convergent evolution. By contrast, the intestinal microflora of TWA diverged in a direction enabling the host to subsist on sparse and low-quality forage. Meanwhile, high microbial diversity (Shannon and Chao1 indices), cellulolytic activity, and abundant indicator species such as Spirochaetes, Bacteroidetes, Prevotella_1, and Treponema_2 supported forage digestion and short-chain fatty acid production in the gut of TWA. Meanwhile, the enterotype identification analysis showed that TWA shifted their enterotype in response to low-quality forage for a better utilization of forage nitrogen and short-chain fatty acid production. Metagenomic analysis revealed that plant biomass degrading microbial consortia, genes, and enzymes like the cellulolytic strains (Prevotella ruminicola, Ruminococcus flavefaciens, Ruminococcus albus, Butyrivibrio fibrisolvens, and Ruminobacter amylophilus), as well as carbohydrate metabolism genes (GH43, GH3, GH31, GH5, and GH10) and enzymes (β-glucosidase, xylanase, and β-xylosidase, etc.) had a significantly higher enrichment in TWA. Our results indicate that gut microbiota can improve the adaptability of TWA through plant biomass degradation and energy maintenance by the functions of gut microbiota in the face of nutritional deficiencies and also provide a strong rationale for understanding the roles of gut microbiota in the adaptation of QTP wildlife when facing harsh feeding environments.

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“…The microbial consortia in herbivore digestive tracts have co-evolved with their hosts. They convert lignocellulose hydrolysates into short-chain fatty acids (SCFAs) and play vital roles in host digestion (Kumar et al, 2021), health (Shreiner et al, 2015), immunity (Zhang et al, 2015), and adaptability (Ley et al, 2008). Advances in sequencing technology over the past decade have provided novel insights into microbiome co-evolution and adaptability.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the functional significance of novel cellulolytic bacteria for the anaerobic digestion of rice straw

Cited by 16 publications

References 54 publications

Efficient degradation of rice straw through a novel psychrotolerant Bacillus cereus at low temperature

Efficient degradation of rice straw through a novel psychrotolerant Bacillus cereus at low temperature

The Gut Microbiota Determines the High-Altitude Adaptability of Tibetan Wild Asses (Equus kiang) in Qinghai-Tibet Plateau

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