Cytological, Phytohormone, and Transcriptome Analyses Provide Insights into Persimmon Fruit Shape Formation ( Diospyros kaki Thunb. )

• Published in: International journal of molecular sciences Vol. 25; no. 9; p. 4812
• Main Authors: Li, Huawei, Suo, Yujing, Li, Hui, Sun, Peng, Han, Weijuan, Fu, Jianmin
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01.05.2024
• Subjects: Abscisic acid; Biosynthesis; Cell division; Diospyros - genetics; Diospyros - growth & development; Diospyros - metabolism; Females; Flowers - genetics; Flowers - growth & development; Flowers - metabolism; Fruit - genetics; Fruit - growth & development; Fruit - metabolism; fruit shape; Fruits; Gene Expression Profiling - methods; Gene Expression Regulation, Plant; Morphology; persimmon; phytohormone; Plant growth; Plant Growth Regulators - metabolism; Plant Proteins - genetics; Plant Proteins - metabolism; Signal transduction; Transcriptome; China; fruit shape; transcriptome; persimmon; phytohormone
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms25094812

Fruit shape is an important external feature when consumers choose their preferred fruit varieties. Studying persimmon ( ) fruit shape is beneficial to increasing its commodity value. However, research on persimmon fruit shape is still in the initial stage. In this study, the mechanism of fruit shape formation was studied by cytological observations, phytohormone assays, and transcriptome analysis using the long fruit and flat fruit produced by 'Yaoxianwuhua' hermaphroditic flowers. The results showed that stage 2-3 (June 11-June ) was the critical period for persimmon fruit shape formation. Persimmon fruit shape is determined by cell number in the transverse direction and cell length in the longitudinal direction. High IAA, GA , ZT, and BR levels may promote long fruit formation by promoting cell elongation in the longitudinal direction, and high GA and ABA levels may be more conducive to flat fruit formation by increasing the cell number in the transverse direction and inhibiting cell elongation in the longitudinal direction, respectively. Thirty-two DEGs related to phytohormone biosynthesis and signaling pathways and nine DEGs related to cell division and cell expansion may be involved in the persimmon fruit shape formation process. These results provide valuable information for regulatory mechanism research on persimmon fruit formation.