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Article Abstract
Tree peony is a traditional and popular ornamental flower. However, its short and concentrated flowering period restricts the development of the tree peony industry. In this study, the function of the PomiR171n-PoUGT89B2 combination related to senescence regulation was analyzed, using Paeonia ostii 'Fengdan' (P. ostii 'Fengdan') as the experimental material. The results revealed a negative regulation between PomiR171n and PoUGT89B2, with both genes controlling the senescence of tree peony. Transient infection tests showed that the cut flowers of tree peony infected with pCAMBIA2300-PomiR171n exhibited an earlier flowering time, while pCAMBIA2300-PoUGT89B2 was premature senescence. After transient silencing infection, the senescence time of fresh cut flowers infected with TRV2-PomiR171n was shortened, while the flowering duration of cut flowers infected with TRV2-PoUGT89B2 was prolonged and the senescence was delayed. Moreover, the overexpression of PomiR171n led to early flowering and reduced number of rosette leaves, while the overexpression of PoUGT89B2 delayed flowering in Arabidopsis. This study explored the role of PomiR171n and its target gene PoUGT89B2 in the flowering and senescence process of tree peony through overexpression and silencing mechanisms. The results lay a foundation for analyzing the regulatory network of tree peony flowering and senescence.
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| http://dx.doi.org/10.1016/j.ijbiomac.2025.146254 | DOI Listing |
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