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Genotypic diversity in potato non-starch and starch lysophospholipids and relationships with starch qualities
Journal article   Peer reviewed

Genotypic diversity in potato non-starch and starch lysophospholipids and relationships with starch qualities

Chuan Tong, Zhimin Yu, Zheng Ma, Lei Liu and Jinsong Bao
Food hydrocolloids, Vol.162, pp.1-9
05/2025
DOI: https://doi.org/10.1016/j.foodhyd.2024.111016

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Abstract

potato phospholipid starch lipid non-starch lipid starch properties
Lysophospholipids (LPLs) are minor endogenous lipids in tuber crops, which could often bind with starch to form amylose-lipid complex impacting starch properties. In this study, diversity in specific non-starch and starch LPLs from 14 cultivated potatoes were analyzed. Results showed that levels and classes of specific non-starch and starch LPLs greatly differed among potato genotypes, indicating a wide diversity in potato LPLs. LPC18:2 (up to 37.66 mu g/g) and LPE16:0 (up to 17.25 mu g/g) were main non-starch LPL components, while LPC18:2 (1.68-9.06 mu g/g) and LPE18:2 (0.76-4.03 mu g/g) were major starch LPL components. Range of TLPC, TLPE and TLPLs in non- starch LPLs were 0.30-94.11, 0-31.21, and 0.30-125.32 mu g/g, greatly higher than that in starch LPLs (2.84-15.94, 0.92-6.59 and 3.65-22.54 mu g/g). Individual non-starch and starch LPLs had significant correlations between each other, providing insights into the possible LPL biosynthesis in potato. Hierarchical cluster analysis demonstrated that the 14 cultivated potatoes could be divided into three groups. Principal component analysis showed the first two components explained 80.8% and 9.0% of the total variance of non-starch LPL, as well as 78.5% and 11.3% of the total variance of starch LPL. Non-starch LPLs had several correlations with HPV, BD and Tc, whereas starch LPLs significantly related with HPV, Tc and HD, demonstrating both great effects on starch qualities. Understanding of the diversity in potato non-starch and starch LPLs provide insight into the possible LPLs accumulation and further genetic control of LPLs in tuber crops.

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