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Relationship of seed hardness development and microstructure of seed coat cell in soft seed pomegranate

文献类型： 外文期刊

作者： Xie, X. 1 ; Huang, Y. 3 ; Tian, S. 1 ; Li, G. 3 ; Cao, S. 2 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Hort, Hangzhou 310021, Peoples R China

2.Chinese Acad Agr Sci, Zhengzhou Fruit Res Inst, Key Lab Fruit Breeding Technol, Minist Agricuture, Zhengzhou 450009, Peoples R China

3.Panzhihua Acad Agr & Forestry Sci, Panzhihua 617061, Sichuan, Peoples R China

关键词： pomegranate; soft seed; seed hardness; seed coat; lignifying; cell wall of seed coat

期刊名称：IV INTERNATIONAL SYMPOSIUM ON POMEGRANATE AND MINOR MEDITERRANEAN FRUITS

ISSN： 0567-7572

年卷期： 2019 年 1254 卷

页码：

收录情况： SCI

摘要： In order to learn the seed hardness of pomegranate during development, the soft seed cultivar 'Tunisia' (TNS), the semi-soft seed cultivar 'Israel Sour' (IS) and the hard seed cultivar 'Qingpi' (QP) were used in this research. Seed hardness, aril weight and total soluble solids were tested during development. The cell microstructure and lignifying conditions in seed coat were also observed during fruit ripening, under microscope by phloroglucinol-HCl and safranine staining. The seed hardness of TNS grown in different locations was also compared. The maximum hardness stage was presented at the later stage of fruit development but not at the complete ripened stage. On the 97th d after flowering, the seed hardness of TNS arrived its maximum (2.939 kg), while IS and QP got their maximum seed hardness on the 106th d after flowering, with 5.571 and 9.203 kg, respectively. On the 124th d after flowering, at the mature stage, the seed hardness of TNS, IS and QP was 2.887, 4.242 and 8.192 kg, respectively. The correlation between seed hardness and total soluble solids and aril weight varied in a large range. No significant difference of seed hardness was detected among the seeds of TNS grown in different locations at the mature stage. Micro-examination revealed that the cell wall of the integument in seed coat was highly lignified in these cultivars. According to the cell wall thickness of the integument, the order for the three cultivars was QP>IS>TNS. The results suggest that seed hardness is probably related with the cell wall thickness of the integument in the seed coat, being TNS a soft-seeded pomegranate cultivar with significant lower cell wall thickness and the seed hardness of TNS was independent of the growing conditions.

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