Endogenous lipids modulate the structure and functionality of banana starch during heat-moisture treatment
Sijie Huang1, Jiarong Cao2, Lili Zheng1
1National Key Laboratory for Tropical Crop Breeding, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China.
Abstract:
This study investigated the composition of starch granule lipids (SGLs) in two banana cultivars (Brazilian banana (BX) and Bodao banana (BD)) and evaluated their effects on starch structure, physicochemical properties, and response to heat-moisture treatment (HMT). A total of 27 lipid subclasses and 221 lipid species were identified, with free fatty acids (FFA), monoacylglycerols (MG), and diacylglycerols (DG) being the major components. Removal of SGLs led to increased surface roughness and porosity of starch granules, and enhanced crystalline order, ultimately altering the starch's physicochemical properties and water-lipid interactions. Following HMT, samples retaining SGLs exhibited significantly higher crystallinity, with resistant starch (RS) content increasing from 51.56 % and 57.70 % to 61.93 % and 64.11 %, respectively. This study reveals the regulatory role of SGLs in the structural and functional properties of banana starch, providing a theoretical basis for its application and modification.
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