Role of <i>BraSWEET12</i> in Regulating Flowering through Sucrose Transport in Flowering Chinese Cabbage

Role of <i>BraSWEET12</i> in Regulating Flowering through Sucrose Transport in Flowering Chinese Cabbage

We assessed the flowering Chinese cabbage (<i>Brassica rapa</i> var. <i>parachinensis</i>), a specialty vegetable found in southern China. The sugar content of the stem tip is closely related to bolting and flowering. Sugar Will Eventually be Exported Transporters (SWEETs) ar...

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Bibliographic Details
Main Authors: Qinqin He, Liming He, Zongqin Feng, Yin Liu, Yunyi Xiao, Jinfeng Liu, Hanbing Han, Xinmin Huang
Format: Article
Language:English
Published: MDPI AG 2024-09-01
Series:Horticulturae
Subjects:
flowering Chinese cabbage
BraSWEET12
sucrose transporter
flowering regulation
gibberellin
low temperature response
Online Access:https://www.mdpi.com/2311-7524/10/10/1037
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Summary:We assessed the flowering Chinese cabbage (<i>Brassica rapa</i> var. <i>parachinensis</i>), a specialty vegetable found in southern China. The sugar content of the stem tip is closely related to bolting and flowering. Sugar Will Eventually be Exported Transporters (SWEETs) are bidirectional sugar transporter proteins involved in numerous plant growth and development processes. The expression of <i>BraSWEET12</i> is positively correlated with sugar content. However, it is unclear whether <i>BraSWEET12</i> is involved in bolting and flowering. In this study, we identified and characterized <i>BraSWEET12</i>. BraSWEET12 in flowering Chinese cabbage contains 288 amino acids and is located on the cell membrane as a sucrose transporter protein. <i>BraSWEET12</i> is highly expressed in the petals and stem tips of flowering Chinese cabbage and is upregulated by gibberellin and low temperatures. Overexpression of <i>BraSWEET12</i> in Arabidopsis can increase sucrose content at the stem tip, upregulate the expression of <i>AtAP1</i> and <i>AtLFY</i>, and advance the flowering time. Subsequently, our results indicate that BraSWEET12 is involved in sucrose accumulation at the stem tip of flowering Chinese cabbage and plays a crucial role in flowering regulation. These results provide a reference for elucidating the regulatory mechanisms underlying flowering Chinese cabbage bolting and flowering.
ISSN:2311-7524

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