Polysaccharide Structure and Function

In a recent research study, scientists investigated the structural variations among various polysaccharides synthesized by different plant species. They noted that the starches derived from certain plants exhibited distinctly varying glycosidic linkages and branching structures, which could influence their digestibility and energy release characteristics.

One particular polysaccharide, identified as being composed exclusively of glucose units connected predominantly by α(1→4) glycosidic bonds, with occasional α(1→6) bonds leading to branch points, demonstrated distinct properties in terms of both solubility and the rate of enzymatic digestion.

The study further examined how these structural features contributed to the plant's adaptability in various environmental conditions, particularly focusing on the efficiency of energy storage and release mechanisms under stress.

Based on this information, which of the following polysaccharides is most likely responsible for the characteristics described in the study?