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Int. J. Mol. Sci. 2017, 18(7), 1549; doi:10.3390/ijms18071549

BRS1 Function in Facilitating Lateral Root Emergence in Arabidopsis

1
State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China
2
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
*
Authors to whom correspondence should be addressed.
Received: 27 May 2017 / Revised: 10 July 2017 / Accepted: 12 July 2017 / Published: 18 July 2017
(This article belongs to the Special Issue Selected Papers from the 6th National Plant Protein Research Congress)
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Abstract

The BRS1 (BRI1 Suppressor 1) gene encodes a serine carboxypeptidase that plays a critical role in the brassinosteroid signaling pathway. However, its specific biological function remains unclear. In this study, the developmental role of BRS1 was investigated in Arabidopsis thaliana. We found that overexpressing BRS1 resulted in significantly more lateral roots in different Arabidopsis ecotypes (WS2 and Col-0) and in brassinosteroid mutants (bri1-5 and det2-28). Further research showed that BRS1 facilitates the process whereby lateral root primordia break through the endodermis, cortex, and epidermis. Consistent with this, BRS1 was found to be highly expressed in the root endodermis and accumulated in the extracellular space around the dome of the lateral root primordia. Taken together, these results highlight the role of BRS1 in the process of lateral root emergence and provide new insight into the role of serine carboxypeptidases in plant root development. View Full-Text
Keywords: serine carboxypeptidase; lateral root emergence; endodermis; BR signaling serine carboxypeptidase; lateral root emergence; endodermis; BR signaling
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Deng, Q.; Wang, X.; Zhang, D.; Wang, X.; Feng, C.; Xu, S. BRS1 Function in Facilitating Lateral Root Emergence in Arabidopsis. Int. J. Mol. Sci. 2017, 18, 1549.

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