A novel underutilized starch resource— Lucuma nervosa A.DC seed and fruit
2021
Li, Bo | Zhang, Yutong | Zhang, Yayuan | Zhang, Yanjun | Xu, Fei | Zhu, Kexue | Huang, Chongxing
The starch isolated from Pouteria campechiana seeds and pulp is the novel underutilized tropical fruit resource. Pouteria campechiana seed starch (PCSS) had higher amylose content (33.65%), peak viscosity (PV) (4612 cP), breakdown viscosity (BDV) (1993 cP), pasting temperature (Tp) (74.45 °C), gelatinization enthalpy (ΔH) (11.06 J/g), gel adhesiveness (−5.15 g-s), relative crystallinity (Rc) (22.68%), and short-range molecular order (0.740) than Pouteria campechiana pulp starch (PCPS) (16.63%, 4288 cP, 544 cP, 70.95 °C, 8.43 J/g, −10.22 g-s, 17.65%, and 0.675, respectively). Contrastingly, PCSS had lower final viscosity (FV) (3651 cP), setback viscosity (SBV) (1032 cP), gel hardness (173.69 g), water absorption capacity (WAC) (95.21%), and average particle size (7.26 μm) than PCPS (5763 cP, 2019 cP, 243.39 g, 122.86%, and 9.21 μm, respectively). PCSS and PCPS had A-type crystalline structures. A principal component analysis disclosed significantly positive correlations between 1047/1,022, amylose, Rc, Tp, ΔH, and Pt (p < 0.05). Porosity, PV, BDV, FV, gel adhesiveness, gel hardness, and WAC were significantly positively correlated with particle size and SBV whereas 1047/1,022, amylose, Rc, Tp, Pt, and ΔH were significantly negatively correlated with these parameters (p < 0.05). Thus, a theoretical reference for further empirical investigations into P. campechiana fruit and seed starch applications in the food industry has been provided.
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