JcSEP3 regulates stamen development in Jatropha curcas

JcSEP3 Regulates Stamen Development in Jatropha curcas----Chinese Academy of Sciences
Phenotypes of wild-type (WT), JcSEP3-overexpressing and JcSEP3-RNAi transgenic plants. Credit: Zhao Meili

SEPALLATA (SEP) genes are the plant-specific MIKC-type MADS-box genes, belonging to the class E genes in the ABCE model of flower organ development.

The function of SEPs in the regulation of floral organ development is widely present in plants. However, the function of JcSEP genes in regulating flower development remains unclear in Jatropha curcas, a promising biofuel plant. 

In a study published in Planta, a research team from Xishuangbanna Tropical Botanical Garden (XTBG) of the Chinese Academy of Sciences investigated the role of the JcSEP3 gene in floral organ development in the woody plant Jatropha curcas.

The researchers constructed the JcSEP3-overexpressing and JcSEP3-RNA interference (RNAi) vectors to transform Jatropha. Positive transgenic plants were further confirmed using qRT-PCR analysis.

They found that the overexpressing JcSEP3 in inflorescence buds caused abnormal phenotypes of the JcSEP3-overexpressing transgenic plants, which implies that JcSEP3 is an important regulator in the development of stamens of Jatropha. 

To further understand in transgenic plants at genome-wide level, the researchers compared transcriptome changes in inflorescences between the JcSEP3-overexpressing, JcSEP3-RNAi transgenic and wild-type

In the JcSEP3-overexpressing , they discovered 25 upregulated genes involved in anther and pollen development, as well as 12 induced in brassinosteroid (BR) and gibberellin (GA) signaling pathways.

"Our results suggest that JcSEP3 directly or indirectly regulates stamen development, concomitant with the regulation of BR and GA signaling pathways," said Chen Maosheng of XTBG.


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More information: Mei-Li Zhao et al, An ortholog of the MADS-box gene SEPALLATA3 regulates stamen development in the woody plant Jatropha curcas, Planta (2022). DOI: 10.1007/s00425-022-03886-3
Citation: JcSEP3 regulates stamen development in Jatropha curcas (2022, June 8) retrieved 16 August 2022 from https://phys.org/news/2022-06-jcsep3-stamen-jatropha-curcas.html
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