التفاصيل البيبلوغرافية
| العنوان: |
SiCEP3, a C-terminally encoded peptide from Setaria italica, promotes ABA import and signaling. |
| المؤلفون: |
Zhang, Lei, Ren, Yue, Xu, Qian, Wan, Yiman, Zhang, Shizhong, Yang, Guodong, Huang, Jinguang, Yan, Kang, Zheng, Chengchao, Wu, Changai |
| المصدر: |
Journal of Experimental Botany; 9/30/2021, Vol. 72 Issue 18, p6260-6273, 14p |
| مصطلحات موضوعية: |
FOXTAIL millet, ABSCISIC acid, PLANT growth, PLANT development, BRASSINOSTEROIDS |
| مستخلص: |
C-terminally encoded peptides (CEPs) are small peptides, typically post-translationally modified, and highly conserved in many species. CEPs are known to inhibit plant growth and development, but the mechanisms are not well understood. In this study, 14 CEPs were identified in Setaria italica and divided into two groups. The transcripts of most SiCEP s were more abundant in roots than in other detected tissues. SiCEP3, SiCEP4, and SiCEP5 were also highly expressed in panicles. Moreover, expression of all SiCEP s was induced by abiotic stresses and phytohormones. SiCEP3 overexpression and application of synthetic SiCEP3 both inhibited seedling growth. In the presence of abscisic acid (ABA), growth inhibition and ABA content in seedlings increased with the concentration of SiCEP3. Transcripts encoding eight ABA transporters and six ABA receptors were induced or repressed by synthetic SiCEP3, ABA, and their combination. Further analysis using loss-of-function mutants of Arabidopsis genes functioning as ABA transporters, receptors, and in the biosynthesis and degradation of ABA revealed that SiCEP3 promoted ABA import at least via NRT1.2 (NITRATE TRANSPORTER 1.2) and ABCG40 (ATP-BINDING CASSETTE G40). In addition, SiCEP3, ABA, or their combination inhibited the kinase activities of CEP receptors AtCEPR1/2. Taken together, our results indicated that the CEP-CEPR module mediates ABA signaling by regulating ABA transporters and ABA receptors in planta. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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