期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 70, 期 11, 页码 3420-3434出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.1c07622
关键词
MADS-box transcription factor; BnaAGL11; leaf senescence; leaf morphogenesis; Brassica napus
资金
- National Natural Science Foundation of China [31971974]
- Chinese Universities Scientific Fund [2452020005]
This study reveals that overexpression of BnaAGL11 in Brassica napus results in smaller, curly leaves and accelerated leaf senescence. This is achieved through the regulation of multiple gene transcription, where BnaAGL11 indirectly controls leaf morphogenesis and senescence.
Previous studies have reported that SEEDSTICK/AGAMOUS-LIKE 11 (AtSTK/AtAGL11), a MADS-box transcription factor, plays important roles in many biological processes in Arabidopsis thaliana. However, the function of BnaAGL11, an AtAGL11 homologous gene from Brassica napus, in leaf development remains unknown. Here, we found that the ectopic expression of any copy of Bna.C09.AGL11, Bna.A03.AGL11, and Bna.A09.AGL11 in A. thaliana led to smaller and curly leaves and promoted leaf senescence. Consistently, the overexpression of Bna.C09.AGL11 in B. napus also caused smaller and curly leaves and accelerated leaf senescence. Furthermore, we demonstrated that Bna.C09.AGL11 controlled leaf morphogenesis by indirectly downregulating the genes of Bna.A01.DWF4 and Bna.C07.PGX3 and promoted leaf senescence by indirectly upregulating the genes of Bna.A04.ABI5, Bna.A05.ABI5, Bna.C04.ABI5-1, and Bna.C01.SEN4 and directly activating the transcription of Bna.C04.ABI5-2 and Bna.C03.SEN4 genes. Our results provide new insights into the underlying regulatory mechanism of BnaAGL11 during leaf development in B. napus.
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