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Abstract of a thesis doctor of Philosophy in biology: Atudy on the composition, distribution of Amorphophallus Spp. tubers containing glucomannan and selection of species which has the potential to be grown in some northern provinces in Vietnam

Aims of the study: Assess the composition and distribution of Amorphophallus genus (Amorphophallus spp.) contains glucomannan in some northern provinces in Vietnam; choosing the Amorphophallus species that has high level of glucomannan and developing potential for reproduction and growing in some norther provinces in Vietnam; testing the reproduction and growing of the candidate species in some northern provinces in Vietnam. | MINISTRY OF EDUCATION VIETNAM ACADEMY OF SCIENCE AND TRAINING AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY ----------------------------- TRAN VAN TIEN STUDY ON THE COMPOSITION DISTRIBUTION OF AMORPHOPHALLUS SPP. TUBERS CONTAINING GLUCOMANNAN AND SELECTION OF SPECIES WHICH HAS THE POTENTIAL TO BE GROWN IN SOME NORTHERN PROVINCES IN VIETNAM Major Botany Code 62.42.01.11 ABSTRACT OF A THESIS DOCTOR OF PHILOSOPHY IN BIOLOGY HA NOI - 2017 This thesis was fulfilled at Graduate University of Science and Technology Supervisors 1 Dr. Nguyen Van Du 2 Assoc. Prof. Dr. Ha Van Huan Reviewer 1 . Reviewer 2 . Reviewer 3 . The thesis will be defended at the University of Science and Technology 18 Hoang Quoc Viet Cau Giay Ha Noi City 2017 The thesis can be found at The National Library of Vietnam Library University of Science and Technolog INTRODUCTION 1. Rationales of study Some of the species in Amorphophallus genus. From Araceae family that contains glucomannan one of the sugars with large molecular that has chain structure and already being grown in many countries in the world such as Japan. China India in order to harvest the root for food and functional food production. According to Chua M. Baldwin TC. Hocking TJ. Chan K. 2010 the root of some species in Amorphophallus genus has glucomannan a water-soluble polysaccharide. Products containing glucomannan in Amorphophallus s root has glucose control capability in blood reducing the lipid levels in the blood and decrease the hungry in obese people. In Vietnam the root has been used in traditional dishes from a long time ago in local ethnic groups in some northern provinces in the country. However Amorphophallus has only been harvested in a small scale in some local areas and these dishes are prepared like some kind of tofu called Mò gỉ Nùng language or Cò ký thơ Mông language noodle fried bread . Nguyen Van Du 2012 . Studies about the Amorphophallus in Vietnam show some species in this genus contains glucomannan .