التفاصيل البيبلوغرافية
| العنوان: |
Exploring rumen microbe-derived fibre-degrading activities for improving feed digestibility |
| المؤلفون: |
Moon, Christina D., Gagic, D., Ciric, M., Noel, S., Summers, Emma Louise, Li, D., Atua, R.M., Perry, R., Sang, C., Zhang, Y.L., Schofield, L.R., Leahy, S.C., Altermann, E., Janssen, P.H., Arcus, Vickery L., Kelly, W.J., Waghorn, G.C., Rakonjac, K., Attwood, G.T. |
| سنة النشر: |
2014 |
| المجموعة: |
The University of Waikato: Research Commons |
| مصطلحات موضوعية: |
Digestibility, enzymes, fibre, nutrition, plant cell walls, rumen microbes, supplemental feeds |
| جغرافية الموضوع: |
Hamilton, New Zealand |
| Time: |
Hamilton, New Zealand |
| الوصف: |
Ruminal fibre degradation is mediated by a complex community of rumen microbes, and its efficiency is crucial for optimal dairy productivity. Enzymes produced by rumen microbes are primarily responsible for degrading the complex structural polysaccharides that comprise fibre in the plant cell walls of feed materials. Because rumen microbes have evolved with their ruminant hosts over millions of years to perform this task, their enzymes are hypothesised to be optimally suited for activity at the temperature, pH range, and anaerobic environment of the rumen. However, fibre-rich diets are not fully digested, which represents a loss in potential animal productivity. Thus, there is opportunity to improve fibre utilisation through treating feeds with rumen microbe-derived fibrolytic enzymes and associated activities that enhance fibre degradation. This research aims to gain a better understanding of the key rumen microbes involved in fibre degradation and the mechanisms they employ to degrade fibre, by applying cultivation-based and culture-independent genomics approaches to rumen microbial communities of New Zealand dairy cattle. Using this knowledge, we aim to identify new opportunities for improving fibre degradation to enhance dairy productivity. Rumen content samples were taken over the course of a year from a Waikato dairy production herd. Over 1,000 rumen bacterial cultures were obtained from the plant-adherent fraction of the rumen contents. Among these cultures, two, 59 and 103 potentially new families, genera and species of rumen bacteria were identified, respectively. Many of the novel strains are being genome sequenced within the Hungate 1000 rumen microbial reference genome programme, which is providing deeper insights into the range of mechanisms used by the individual strains for fibre degradation. This information has been used to guide the selection of rumen bacterial strains with considerable potential as fibrolytic enzyme producers in vitro, with the intent of developing the strains so that their ... |
| نوع الوثيقة: |
conference object |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| Relation: |
http://www.adssymposium.com.au/inewsfiles/2014proceedings/ADSS2014_FULL.pdf; Proceedings 6th Australasian Dairy Science Symposium; Moon, C. D., Gagic, D., Ciric, M., Noel, S., Summers, E. L., Li, D., … Attwood, G. T. (2014). Exploring rumen microbe-derived fibre-degrading activities for improving feed digestibility. In Proceedings 6th Australasian Dairy Science Symposium (pp. 377–379). Hamilton, New Zealand.; https://hdl.handle.net/10289/11169 |
| الاتاحة: |
https://hdl.handle.net/10289/11169 |
| Rights: |
This article is published in the Proceedings 6th Australasian Dairy Science Symposium. |
| رقم الانضمام: |
edsbas.89FA85A9 |
| قاعدة البيانات: |
BASE |