PMID- 36906363 OWN - NLM STAT- MEDLINE DCOM- 20230314 LR - 20230314 IS - 1879-1344 (Electronic) IS - 0144-8617 (Linking) VI - 309 DP - 2023 Jun 1 TI - Structural characteristics and gel properties of pectin from citrus physiological premature fruit drop. PG - 120682 LID - S0144-8617(23)00146-7 [pii] LID - 10.1016/j.carbpol.2023.120682 [doi] AB - This study is the first to extract and characterize pectin from citrus physiological premature fruit drop. The extraction yield of pectin reached 4.4 % by acid hydrolysis method. The degree of methoxy-esterification (DM) of citrus physiological premature fruit drop pectin (CPDP) was 15.27 %, indicating it was low-methoxylated pectin (LMP). The monosaccharide composition and molar mass test results showed CPDP was a highly branched macromolecular polysaccharide (beta: 0.02, Mw: 2.006 x 10(5) g/mol) with rich rhamnogalacturonan I domain (50.40 %) and long arabinose and galactose side chain (32.02 %). Based on the fact that CPDP is LMP, Ca(2+) was used to induce CPDP to form gels. Textural and rheological tests showed that the gel strength and storage modulus of CPDP were higher than commercial citrus pectin (CP) used in this paper due to the lower DM and rich neutral sugar side chains of CPDP. Scanning electron microscope (SEM) results showed CPDP had stable gel network structure. CI - Copyright (c) 2023 Elsevier Ltd. All rights reserved. FAU - Qi, Tingting AU - Qi T AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. FAU - Ren, Jingnan AU - Ren J AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. FAU - Li, Xiao AU - Li X AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. FAU - An, Qi AU - An Q AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. FAU - Zhang, Nawei AU - Zhang N AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. FAU - Jia, Xiao AU - Jia X AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. FAU - Pan, Siyi AU - Pan S AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. FAU - Fan, Gang AU - Fan G AD - Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. Electronic address: fangang@mail.hzau.edu.cn. FAU - Zhang, Zhifeng AU - Zhang Z AD - Ningxia Huaxinda Health Technology Co., Ltd., Lingwu 751400, China. FAU - Wu, Kangning AU - Wu K AD - Ningxia Huaxinda Health Technology Co., Ltd., Lingwu 751400, China. LA - eng PT - Journal Article DEP - 20230210 PL - England TA - Carbohydr Polym JT - Carbohydrate polymers JID - 8307156 RN - 96322-71-3 (bis(cyclopentenecarboxylato)-1,2-diaminocyclohexane-platinum(II)) RN - 89NA02M4RX (Pectins) RN - 0 (Gels) SB - IM MH - *Citrus/chemistry MH - Fruit/chemistry MH - Pectins/chemistry MH - Gels/analysis OTO - NOTNLM OT - Citrus OT - Gel strength OT - Low-methoxylated pectin OT - Rhamnogalacturonan I OT - Rheology OT - SEM COIS- Declaration of competing interest We declare that there are no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper We declare that this manuscript or part of its content is not submitted elsewhere, nor is it under consideration for submission elsewhere. EDAT- 2023/03/12 06:00 MHDA- 2023/03/15 06:00 CRDT- 2023/03/11 20:59 PHST- 2022/10/20 00:00 [received] PHST- 2023/02/05 00:00 [revised] PHST- 2023/02/06 00:00 [accepted] PHST- 2023/03/11 20:59 [entrez] PHST- 2023/03/12 06:00 [pubmed] PHST- 2023/03/15 06:00 [medline] AID - S0144-8617(23)00146-7 [pii] AID - 10.1016/j.carbpol.2023.120682 [doi] PST - ppublish SO - Carbohydr Polym. 2023 Jun 1;309:120682. doi: 10.1016/j.carbpol.2023.120682. Epub 2023 Feb 10.