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Projects / Programmes source: ARIS

Kakovost pridelkov glede na sestavo rastlinskih metabolitov (Slovene)

Research activity

Code Science Field Subfield
4.03.01  Biotechnical sciences  Plant production  Agricultural plants 

Code Science Field
B225  Biomedical sciences  Plant genetics 
B420  Biomedical sciences  Nutrition 
Keywords
Genotypes, peas, buckwheat, amylose, amylopectin, starch, isogenic lines, digestibility, retrograded starch, resistant starch, groats.
Evaluation (rules)
source: COBISS
Researchers (15)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  02085  PhD Franc Batič  Plant production  Researcher  1996 - 2001  817 
2.  10582  PhD Ingrid Falnoga  Neurobiology  Researcher  1999 - 2001  345 
3.  09980  PhD Terezija Golob  Animal production  Researcher  2000 - 2001  486 
4.  14082  PhD Radojko Jaćimović  Physics  Researcher  1996 - 2001  735 
5.  00950  PhD Ivan Kreft  Plant production  Head  2000 - 2001  909 
6.  05083  PhD Zlata Luthar  Biotechnology  Researcher  1996 - 2001  378 
7.  05964  PhD Jože Osvald  Plant production  Researcher  1998 - 2001  473 
8.  17785  Nino Petrovič    Researcher  2000 - 2001  16 
9.  03873  PhD Anamarija Plestenjak  Animal production  Researcher  1996 - 2001  276 
10.  15728  Janja Smrke    Researcher  1996 - 2001  33 
11.  01873  PhD Vekoslava Stibilj  Chemistry  Researcher  1996 - 2001  687 
12.  20500  MSc Karmen Stopar  Plant production  Researcher  1996 - 2001  114 
13.  04694  PhD Katja Vadnal  Plant production  Researcher  2000 - 2001  517 
14.  13011  Iztok Vidic  Plant production  Researcher  2000 - 2001  29 
15.  09049  MSc Sanja Vranac  Plant production  Researcher  1996 - 2001  50 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  91,002 
Abstract
The formation of resistant starch (RS) and the rate of starch hydrolysis were evaluated in vitro in pea genotypes RRRbRb BC3 (with 32.7% amylose content), RRrbrb BC3 (with 23.3%; amylose content), and rrRbRb BC3 (with 65.1% amylose content). The set of lines was near isogenic, except for the genes at the r and rb loci. The amylose/amylopectin ratio was an important determinant of the rate of starch hydrolysis. The hydrolysis indices (HI) and predicted glycemic indices (GI) were lowest in the rrRbRb BC3, as compared to the RRrbrb BC3 peas. In buckwheat groats (cv. Darja) samples treated with three autoclaving/cooling cycles there was significantly (P<0.001) more apparent and true amylose in the starch in comparison to the native sample or to samples autoclaved once. This may be due to gradual cleavage of some glycosidic bonds of starch, resulting in shorter linear chains, which could be then more predisposed both to forming amylose-like helices and more complex aggregates. Content of total starch (TS), rapidly digested starch (RDS), slowly digested starch (SDS), resistant starch (RS) and retrograded starch (RS3), apparent amylose and total amylose were studied in raw (uncooked) and in hydrothermally treated buckwheat groats. Hydrothermally treated buckwheat samples contained 4.0 - 4.3% of retrograded starch (dmb). This means that about 5.5% of the TS present in the samples appeared as RS3. There was a good correlation between the retrograded starch by the in vitro method and the undigested starch in vivo in rats (r= 0.91, P< 0.01). Buckwheat groats starch with a reduced rate of digestion could be a possible complement to or substitute of common carbohydrate sources.
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