Effect of diurnal photosynthetic activity on the fine structure of amylopectin from normal and waxy barley starch

Add time:08/27/2019    Source:sciencedirect.com

The impact of diurnal photosynthetic activity on the fine structure of the amylopectin fraction of starch synthesized by normal barley (NBS) and waxy barley (WBS), the latter completely devoid of amylose biosynthesis, was determined following the cultivation under normal diurnal or constant light growing conditions. The amylopectin fine structures were analysed by characterizing its unit chain length profiles after enzymatic debranching as well as its φ,β-limit dextrins and its clusters and building blocks after their partial and complete hydrolysis with α-amylase from Bacillus amyloliquefaciens, respectively. Regardless of lighting conditions, no structural effects were found when comparing both the amylopectin side-chain distribution and the internal chain fragments of these amylopectins. However, the diurnally grown NBS and WBS both showed larger amylopectin clusters and these had lower branching density and longer average chain lengths than clusters derived from plants grown under constant light conditions. Amylopectin clusters from diurnally grown plants also consisted of a greater number of building blocks, and shorter inter-block chain lengths compared to clusters derived from plants grown under constant light. Our data demonstrate that the diurnal light regime influences the fine structure of the amylopectin component both in amylose and non-amylose starch granules.

We also recommend Trading Suppliers and Manufacturers of Amylopectin, acetate phosphate (cas 113894-91-0). Pls Click Website Link as below: cas 113894-91-0 suppliers

Prev:Original ArticleEffect of alkyl chain length of amines on fluorapatite and aluminium phosphates floatabilities
Next:Synthesis and characterization of enzymatically cross-linked feruloyl amylopectin for curcumin encapsulation)