Fungal communities in Brazilian cassava tubers and food products

Ono, Laís Tiemi; Silva, J.J.; Soto, T.S.; Doná, S.; Iamanaka, Beatriz Thie; Fungaro, Maria Helena Pelegrinelli; Taniwaki, Marta Hiromi

doi:10.1016/j.ijfoodmicro.2022.109909

Cited by 6 publications

(6 citation statements)

References 75 publications

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“…Moreover, cassava tubers are abundant in starch and carbohydrates and could be used as the main source of energy in animal feed, but their drawbacks are also very obvious, such as lower CP, ADF, and NDF, etc. [18][19][20][21][22]. In the present study, the contents of WSC and starch in whole-plant cassava were higher than in the above reports, while the contents of CP, NDF, ADF, and GE were lower or comparable to previous reports, which may be explained by the whole-plant cassava containing tubers with higher amounts of WSC and starch.…”

Section: Discussioncontrasting

confidence: 51%

“…In China, research on the utilization of cassava leaves in animals has also made progress, especially in silage making and the effect of goose diets supplemented with cassava leaves [14,15]. In addition, cassava stems contain moderate dietary fibers and starch [16,17]; and cassava tubers are abundant in starch and carbohydrates [18][19][20][21]. Cassava leaves, stem, and tubers have been used as feed resources [5,22,23], and the whole-plant cassava represents an ideal feed source, with the potential to aid the sustainable development of local animal husbandry in tropical regions.…”

Section: Introductionmentioning

confidence: 99%

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Feeding Value Assessment of Five Varieties Whole-Plant Cassava in Tropical China

Li,

Zhou,

et al. 2024

Fermentation

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The feeding value of five varieties of whole-plant cassava (SC5, SC7, SC9, SC14, and SC205) was assessed through analysis of the nutritional composition and in situ ruminal degradability. The results showed abundant nutrients in whole-plant cassava, and the means of starch and crude protein (CP) were 267.7 and 176.8 (g kg−1), and ranged from 223.7 g kg−1 (SC9) to 296.4 g kg−1 (SC14) and from 142.4 g kg−1 (SC5) to 195.8 g kg−1 (SC9) (p < 0.05), respectively. Meanwhile, the moderate neutral detergent fiber (NDF) of whole-plant cassava was also observed and ranged from 266.2 g kg−1 in SC9 to 286.6 g kg−1 in SC14 (p < 0.05). In addition, the trace elements, such as Fe, Mn, Cu, and Zn, in whole-plant cassava were relatively enriched, and their mean concentrations were 135.8, 1225.2, 5.8, and 105.3 mg kg−1 (p < 0.05), respectively. Both the highest essential amino acid and total amino acid concentrations were obtained in SC7 (p < 0.01). The hydrogen cyanide (HCN) content of fresh and dried whole-plant cassava ranged from 76.5 to 131.6 and from 36.0 to 56.7 mg kg−1 (p < 0.05), respectively. The in situ dry matter ruminal degradability and metabolizable energy (ME) varied significantly (p < 0.05) and were consistently lowest and highest in SC9 and SC14, ranging from 50.9% to 80.0% and from 7.5 to 12.3 MJ kg−1, respectively. Collectively, all varieties of whole-plant cassava had a high feeding value, as reflected by abundant starch, minerals, amino acid, and water-soluble carbohydrates, while having a low fiber content and HCN toxicity, as well as excellent ruminal digestibility characteristics, and they could be used as a potential feed resource for ruminants.

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Section: Discussioncontrasting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Feeding Value Assessment of Five Varieties Whole-Plant Cassava in Tropical China

Li,

Zhou,

et al. 2024

Fermentation

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“…Whole-plant cassava has more balanced nutrition for animals than its leaves, stem, or tubers [10,11,15], but the feeding value of whole-plant cassava has not been examined. The data of the corn stalk agreed with those reported by Wang et al [28] and Bai et al [20], confirming that corn was an ideal feed for livestock with high DM, WSC, and starch content.…”

Section: Discussionmentioning

confidence: 99%

“…It has high biomass and is rich in essential nutrients (including protein, fiber, vitamins, and minerals) for animal growth [6] and can be harvested conveniently. The cassava tuber is a vital source of calories for both humans and animals in tropical areas as it contains abundant carbohydrates [7][8][9][10]. Cassava leaves are suitable feed with good digestibility for ruminants, pigs, and poultry, as they are rich in biomass and protein with low fiber content [4,11,12].…”

Section: Introductionmentioning

confidence: 99%

Co-Ensiling Whole-Plant Cassava with Corn Stalk for Excellent Silage Production: Fermentation Characteristics, Bacterial Community, Function Profile, and Microbial Ecological Network Features

Li,

Zi,

Sun

et al. 2024

Agronomy

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The objective of this study was to explore excellent silage production through co-ensiling whole-plant cassava and corn stalk, and different ratios of whole-plant cassava (0%, 10%, 20%, 30%, 40%, and 50%, fresh-matter basis) co-ensiled with corn stalk were analyzed based on the silage bacterial community, function profile, and microbial ecological network features. The results demonstrated that co-ensiling 30% whole-plant cassava with 70% corn stalk could be considered an efficient mode of production. The mixed silage showed great quality, as reflected by the reduced pH value and concentrations of acetic acid, butyric acid, and ammonia nitrogen and the enhanced lactic acid concentration, V-score, and nutritional value compared with corn stalk ensiled alone. Meanwhile, co-ensiling restricted the undesirable bacterial Acetobacter fabarum of corn stalk and Pseudomonas aeruginosa of whole-plant cassava and raised the abundance of lactic acid bacteria (LAB) such as Levilactobacillus brevis, Lactiplantibacillus plantarum, Lactobacillus harbinensis, etc. Besides that, the predicted functions of the bacterial community showed large differences in mixed silage compared with whole-plant cassava or corn stalk ensiled alone. Moreover, the analysis of co-occurrence networks showed that mixed silage affected microbial network features, module numbers, and bacterial relative abundances and weakened the complexity and stability of the networks compared with whole-plant cassava single silage. Furthermore, silage microbial community composition had a huge impact on the network properties, and undesirable Pseudomonas aeruginosa played a crucial role in the complexity and stability. Overall, this study revealed the characteristics of whole-plant cassava with corn stalk mixed-silage microbial communities and co-occurrence network modules, complexity, and stability and partly clarified the microbial mechanism of co-ensiling for producing high-quality silage. The findings of this study have important implications for deeply understanding the ensiling process and precisely regulating silage fermentation quality.

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“…Raffinose might be a novel metabolism to depress cassava post-harvest deterioration. Invasion of microorganisms, such as moulds and aflatoxins and penicillium seriously affects the storage tolerance of cassava post-harvest [ 21 , 26 ]. Previous evidence showed that raffinose could efficiently resist fungi and bacteria infection.…”

Section: Discussionmentioning

confidence: 99%

Reduced glutathione and raffinose lengthens postharvest storage of cassava root tubers by improving antioxidant capacity and antibiosis

Fu,

Zhao,

Huang

et al. 2023

BMC Plant Biol

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Cassava is an ideal food security crop in marginal and drought environment. However, the post-harvest storage of cassava is urgent problem to be resolved. In this study, the storage tolerant and non-tolerant cassava were screened by measuring the change of Peroxidase (POD), Superoxide dismutase (SOD), Catalase (CAT) and Malondialdehyde (MDA) in seven cultivars of cassava. Compared with other cultivars, the cultivar of SC14 showed the highest level of SOD, MDA and POD respectively at 0 day, 12 day and 9 day postharvest while exhibited lowest level of CAT at 0 day postharvest, indicating the strongest antioxidant capability and storage tolerance. In contrast, GR15231, termed as storage non-tolerance cultivars, showed lowest SOD and POD at 12 day and kept a relative high level of CAT at 12 day post-harvest. In addition, SC14 has higher level of starch and dry substance than GR15231. Mass spectrum was performed for SC14 and GR15231 to explore the key metabolites regulating the storage tolerance of cassava. The results showed that the expression of glutathione (reduced) and raffinose was significantly decreased at 12 day post-harvest both in tolerant SC14 and non-tolerant GR15231. Compared with GR15231, SC14 showed higher level of raffinose both at 0 and 12 day post-harvest, indicating that raffinose may be the potential metabolites protecting SC14 cultivar from deterioration post-harvest. Additionally, raffinose ratio of SC14a/SC14b was five times less than that of GR15231a/GR15231b, reflecting the slower degradation of raffinose in SC14 cultivar compared with GR15231 cultivar. In conclusion, the antioxidant microenvironment induced by reduced glutathione and higher level of raffinose in SC14 cultivar might be the promising metabolites to improve its antioxidant capacity and antibiosis and thus maintained the quality of Cassava root tubers.

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Fungal communities in Brazilian cassava tubers and food products

Cited by 6 publications

References 75 publications

Feeding Value Assessment of Five Varieties Whole-Plant Cassava in Tropical China

Feeding Value Assessment of Five Varieties Whole-Plant Cassava in Tropical China

Co-Ensiling Whole-Plant Cassava with Corn Stalk for Excellent Silage Production: Fermentation Characteristics, Bacterial Community, Function Profile, and Microbial Ecological Network Features

Reduced glutathione and raffinose lengthens postharvest storage of cassava root tubers by improving antioxidant capacity and antibiosis

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