Pregled bibliografske jedinice broj: 1081465
The composition of floury and vitreous endosperm affects starch digestibility kinetics of the whole maize kernel
The composition of floury and vitreous endosperm affects starch digestibility kinetics of the whole maize kernel // Journal of cereal science, 95 (2020), 103079, 6 doi:10.1016/j.jcs.2020.103079 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1081465 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
The composition of floury and vitreous
endosperm affects starch digestibility kinetics
of the whole maize kernel
Autori
Zurak, Dora ; Kljak, Kristina ; Grbeša, Darko
Izvornik
Journal of cereal science (0733-5210) 95
(2020);
103079, 6
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
maize ; endosperm ; starch digestibility rate
Sažetak
Maize grain starch is the major energy source in animal nutrition, and its high digestion and utilization largely depend on endosperm traits and the structure of the starch-lipoprotein matrix. The aim of this work was to determine floury and vitreous endosperm traits and its relation to starch digestibility rate. In total, kernels of 30 hybrids were manually dissected, and amylose, total zein and starch and non-starch lipids were determined in both vitreous and floury endosperm. Starch digestibility of the whole kernel was determined based on glucose released during a two-step in vitro pig model of enzymatic digestion, and starch digestibility rate was calculated according to the first-order kinetics. The vitreous endosperm of tested hybrids had higher contents of amylose (204.6 vs 190.4 g/kg), zein (63.2 vs 40.4 k/kg) and starch lipids (5.6 vs 4.9 g/kg), and lower content of non-starch lipids (7.3 vs 9.6 g/kg) than floury endosperm. Digestibility coefficients varied among hybrids, and starch digestibility rate varied from 0.73 to 1.63 1/h. Lipids in both vitreous and floury endosperm negatively correlated with the most of digestion coefficients, whereas zein correlated in vitreous and amylose in the floury endosperm (P < 0.05). Starch digestibility rate negatively correlated with all traits, except amylose content in vitreous endosperm. As a result, a linear regression model with four variables including contents of zein and starch lipids in vitreous and zein and amylose in floury endosperm can predict more than 65% variability of starch digestibility rate of tested hybrids.
Izvorni jezik
Engleski
Znanstvena područja
Poljoprivreda (agronomija)
POVEZANOST RADA
Ustanove:
Agronomski fakultet, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
