Interactions Between the Transcription Factor BOL/DRNL/ESR2 and the Jasmonate Pathway

Interactions Between the Transcription Factor BOL/DRNL/ESR2 and the Jasmonate Pathway

BOL/DRNL/ESR2, an AP2/ERF transcription factor, regulates early organ development in Arabidopsis (<i>Arabidopsis thaliana</i>). Its loss of function causes flower organ defects, while its overexpression induces green callus formation in roots without the addition of hormones. Jasmonates,...

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Main Authors: Beatriz E. Ruiz-Cortés, Yolanda Durán-Medina, C. Cecilia Ramos-Tamayo, Herenia Guerrero-Largo, Ma. Isabel Cristina Elizarraraz-Anaya, Omar Fabián Hernández-Zepeda, Enrique Ramírez-Chávez, Michiel Lammers, Ruud A. de Maagd, Jorge Molina-Torres, Stefan de Folter, Nayelli Marsch-Martínez
Format: Article
Language:English
Published: MDPI AG 2025-06-01
Series:Plants
Subjects:
jasmonate
transcription factor
bolita
BOL
enhancer of shoot regeneration 2
ESR2
Online Access:https://www.mdpi.com/2223-7747/14/12/1757
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Summary:BOL/DRNL/ESR2, an AP2/ERF transcription factor, regulates early organ development in Arabidopsis (<i>Arabidopsis thaliana</i>). Its loss of function causes flower organ defects, while its overexpression induces green callus formation in roots without the addition of hormones. Jasmonates, plant hormones known as major players in stress responses, also regulate some aspects of organ development (e.g., stamen development and plant and organ growth). Here, we studied the interaction between BOL and the JA pathway. We found that exogenous application of methyl jasmonate (MeJA) partially rescued the stamen phenotypes in <i>bol-cr</i> mutants, linking BOL and JA-mediated stamen development. Moreover, MeJA treatments in wild-type plants partially mimicked some <i>bol-D</i> mutant phenotypes like reduced rosette and root size, while JA inhibition restored wild-type leaf curvature, suggesting an alteration in JA homeostasis in the gain-of-function mutant. <i>BOL</i> overexpression caused increased JA levels, whereas <i>bol</i> loss-of-function plants had reduced levels. Furthermore, inducible <i>BOL</i> activity led to downregulation of a JA-responsive marker. Finally, JA biosynthesis inhibition affected BOL-induced root callus formation and led to an expansion of the <i>BOL</i> expression domain in roots. Our findings indicate that BOL modulates parts of the JA pathway and that feedback from the JA pathway appears to affect expression of the transcription factor.
ISSN:2223-7747

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