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4-CPA (4-chlorophenoxyacetic acid) induces the formation and development of defective “fenghou” (vitis vinifera × v. labrusca) grape seeds

Liu, Zhenhua; Wang, Yan; Pu, Wenjiang; Zhu, Haifeng; Liang, Jinjun; Wu, Jiang; Hong, Liang; Guan, Pingyin; Hu, Jianfang

Abstract:
For some horticultural plants, auxins can not only induce normal fruit setting but also form fake seeds in the induced fruits. This phenomenon is relatively rare, and, so far, the underlying mechanism remains unclear. In this study, “Fenghou” (Vitis vinifera × V. labrusca) grapes were artificially emasculated before flowering and then sprayed with 4-CPA (4-chlorophenoxyacetic acid) to analyze its effect on seed formation. The results show that 4-CPA can induce normal fruit setting in “Fenghou” grapes. Although more seeds were detected in the fruits of the 4-CPA-treated grapevine, most seeds were immature. There was no significant difference in the seed shape; namely, both fruit seeds of the grapevines with and without 4-CPA treatment contained a hard seed coat. However, the immature seeds lacked embryo and endosperm tissue and could not germinate successfully; these were considered defective seeds. Tissue structure observation of defective seeds revealed that a lot of tissue redifferentiation occurred at the top of the ovule, which increased the number of cell layers of the outer integument; some even differentiated into new ovule primordia. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000131134
Veröffentlicht am 12.04.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Botanisches Institut (BOTANIK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2218-273X
KITopen-ID: 1000131134
Erschienen in Biomolecules
Verlag MDPI
Band 11
Heft 4
Seiten 515
Schlagwörter grape; auxin; defective seeds; integument; seed coat
Nachgewiesen in Scopus
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