西北农业学报2025，Vol.34Issue(12)：2243-2251,9.DOI:10.7606/j.issn.1004-1389.2025.12.008
不同种皮厚度的中国南瓜种皮结构及组分分析
Structure and Composition of Seed Coat in Cucurbita moschata with Different Seed Coat Thicknesses
摘要
Abstract
This study aimed to investigate the structure and compositional differences in the seed coat of Cucurbita moschata cultivars with different seed coat thicknesses and to elucidate the relationship among seed coat thickness,seed coat structure and component accumulation,laying a foundation for understanding the mechanism of thin seed coat formation and to provide theoretical guidance for the breeding hull-less C.moschata varieties.One normal-seeded and seven thin-coated C.moschata culti-vars with different seed coat thicknesses were used as experimental materials.At 50 days after pollina-tion,seed phenotypes and seed coat microstructures were observed using scanning electron microsco-py,and the contents of lignin,cellulose,and starch in the seed coats were quantified.The results showed that the thinner the seed coat,the greener the seed appearance.The reduction in seed coat thickness in thin-coated cultivars was mainly due to the collapse of three tissue layers:the hypodermis(H),parenchyma(A),and chlorenchyma(C).The contents of lignin,cellulose,and starch were posi-tively correlated with seed coat thickness;the lower their content,the thinner the seed coat.Decreased accumulation or deposition of lignin,cellulose,and starch led to the collapse of the H,A,and C layers,ultimately resulting in the formation of thin seed coats.As the outer seed coat materials diminished,the innermost chlorenchyma(C)layer became more visible,giving the seeds a greener appearance.关键词
薄种皮/南瓜/种皮/结构/组分Key words
Hull-less/Cucurbita moschata/Seed coat/Structure/Composition引用本文复制引用
LIU Jiangtao,WU Junxin,SHEN Qiong..不同种皮厚度的中国南瓜种皮结构及组分分析[J].西北农业学报,2025,34(12):2243-2251,9.基金项目
国家自然科学基金青年基金项目(32202490) （32202490）
山西省现代农业产业技术体系建设专项(2024CYJSTX08-02). Young Scientist Fund of National Natural Science Foundation of China(No.32202490) （2024CYJSTX08-02）
Fund for Modern Agriculture Industry Technology System of Shanxi Province(No.2024CYJSTX08-02). （No.2024CYJSTX08-02）
