Document Detail

Structure and physicochemical properties of starches from kidney bean seeds at immature, premature and mature stages of development.
MedLine Citation:
PMID:  12559751     Owner:  NLM     Status:  MEDLINE    
Starches from kidney bean (Phaseolus vulgaris L. cv. Toramame) seeds at the immature, premature, mature stages of development were examined. The starch content increased from 94, 219 to 265 mg per seed. Starches showed the C(a)-crystalline type composed of small (<5 micrometer) and large (10-35 micrometer) granules, with the large granules largely increasing with maturity. The amylose content increased from 21, 26 to 27%, and rapid viscograms and DSC thermograms suggested that the mature-stage starch was gelatinized with ease. The amylose increased in size from DPn 820, 1000 to 1080 and a number of chains per molecule (NC) from 3.3, 4.2 to 4.5. The branched amylose was a minor component (11-18% by mole) with NC 20-22. The amylopectin was similar in CL (23), beta-amylolysis limit (59%), and chain-length distribution, but reduced in size (DPn 17,100-5270) and increased in content of phosphorus (114-174 ppm) with an increase in the amount of phosphorus linked to C-6 of the glucose residue (8-66%).
Hironori Yoshida; Koichi Nozaki; Isao Hanashiro; Fumio Yagi; Hiroyuki Ito; Mamoru Honma; Hirokazu Matsui; Yasuhito Takeda
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Carbohydrate research     Volume:  338     ISSN:  0008-6215     ISO Abbreviation:  Carbohydr. Res.     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-01-31     Completed Date:  2003-09-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0043535     Medline TA:  Carbohydr Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  463-9     Citation Subset:  IM    
Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, 890-0065, Kagoshima, Japan.
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MeSH Terms
Microscopy, Electron, Scanning
Phaseolus / chemistry*
Seeds / chemistry*,  growth & development
Starch / chemistry*
Reg. No./Substance:

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