Effects of diet on the gastric papillae and microflora of the rodents Mystromys albicaudatus and Cricetomys gambianus
1987; Taylor & Francis; Volume: 22; Issue: 2 Linguagem: Inglês
10.1080/02541858.1987.11448023
ISSN0254-1858
Autores Tópico(s)Physiological and biochemical adaptations
ResumoAbstractDiets high in soluble sugar concentration cause an increase in number and hypertrophy of gastric papillae, and a dominance of filamentous bacilli in the associated symbiotic microflora in two species of rodent. Fibrous diets do not stimulate the growth of papillae but trigger a change in the microbial community which becomes dominated by cocci. Intermediate diets are associated with regular papillae and a mixed gastric microflora The results support an amylolytic reservoir, rather than a cellulose fermentation hypothesis for the symbiosis. The responses of C. gambianus (and its microflora) are more complex than those of M. albicaudatus which suggest multiple functions, including the possible detoxification of secondary plant compounds. Protein digestion and amino acid requirements require urgent attention. The rodent-bacteria symbiosis has important consequences for nutritional niche definition and the competition and coexistence of herbivores.Diëte met ’n hoë oplosbare suikerinhoud veroorsaak ’n toename in aantal, sowel as hipertrofie van die maagpapille in twee knaagdierspesies. Hierdie effekte gaan gepaard met ’n oortieersing van die simbiotiese maagmikroflora deur draadvormige basille. Veseldiëte stimuleer nie die groei van maagpapille nie, maar het wel ’n verandering in die mikrobiese gemeenskap tot gevolg, wat deur kokkusvormige bakterieë oortieers word. Tussendiete gaan gepaard met normale maagpapille en ’n gemengde maagmikroflora. Die resultate dui op ’n amilolitiese opgaring eerder dan ’n sellulosegisting-hipotese ter verduideliking van die simbiose. Die reaksie van C. gambianus (en sy mikroflora) is meer ingewikkeld as dié van M. albicaudatus, wat op veelvoudige funksies dui, insluitende die moontlike ontgifting van sekondSre plantsamestellings. ProteTnevertering en aminosuurbehoeftes verg dringend aandag. Die simbiose van knaagdiere en bakteneë het belangrike gevolge vir voedselnisdefinisie en die kompetisie en medebestaan tussen plantvreters.
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