TY  - JOUR
A1  - Bemer, Marian
A1  - van Mourik, Hilda
A1  - Muino, Jose M.
A1  - Ferrandiz, Cristina
A1  - Kaufmann, Kerstin
A1  - Angenent, Gerco C.
T1  - FRUITFULL controls SAUR10 expression and regulates Arabidopsis growth and architecture
JF  - Journal of experimental botany
N2  - MADS-domain transcription factors are well known for their roles in plant development and regulate sets of downstream genes that have been uncovered by high-throughput analyses. A considerable number of these targets are predicted to function in hormone responses or responses to environmental stimuli, suggesting that there is a close link between developmental and environmental regulators of plant growth and development. Here, we show that the Arabidopsis MADS-domain factor FRUITFULL (FUL) executes several functions in addition to its noted role in fruit development. Among the direct targets of FUL, we identified SMALL AUXIN UPREGULATED RNA 10 (SAUR10), a growth regulator that is highly induced by a combination of auxin and brassinosteroids and in response to reduced R:FR light. Interestingly, we discovered that SAUR10 is repressed by FUL in stems and inflorescence branches. SAUR10 is specifically expressed at the abaxial side of these branches and this localized activity is influenced by hormones, light conditions and by FUL, which has an effect on branch angle. Furthermore, we identified a number of other genes involved in hormone pathways and light signalling as direct targets of FUL in the stem, demonstrating a connection between developmentally and environmentally regulated growth programs.
KW  - Architecture
KW  - auxin
KW  - branching
KW  - FRUITFULL
KW  - growth
KW  - hormones
KW  - light response
KW  - MADS-box transcription factor
KW  - SAUR
Y1  - 2017
U6  - https://doi.org/10.1093/jxb/erx184
SN  - 0022-0957
SN  - 1460-2431
VL  - 68
SP  - 3391
EP  - 3403
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Poxson, David J.
A1  - Karady, Michal
A1  - Gabrielsson, Roger
A1  - Alkattan, Aziz Y.
A1  - Gustavsson, Anna
A1  - Doyle, Siamsa M.
A1  - Robert, Stephanie
A1  - Ljung, Karin
A1  - Grebe, Markus
A1  - Simon, Daniel T.
A1  - Berggren, Magnus
T1  - Regulating plant physiology with organic electronics
JF  - Proceedings of the National Academy of Sciences of the United States of America
N2  - The organic electronic ion pump (OEIP) provides flow-free and accurate delivery of small signaling compounds at high spatio-temporal resolution. To date, the application of OEIPs has been limited to delivery of nonaromatic molecules to mammalian systems, particularly for neuroscience applications. However, many long-standing questions in plant biology remain unanswered due to a lack of technology that precisely delivers plant hormones, based on cyclic alkanes or aromatic structures, to regulate plant physiology. Here, we report the employment of OEIPs for the delivery of the plant hormone auxin to induce differential concentration gradients and modulate plant physiology. We fabricated OEIP devices based on a synthesized dendritic polyelectrolyte that enables electrophoretic transport of aromatic substances. Delivery of auxin to transgenic Arabidopsis thaliana seedlings in vivo was monitored in real time via dynamic fluorescent auxin-response reporters and induced physiological responses in roots. Our results provide a starting point for technologies enabling direct, rapid, and dynamic electronic interaction with the biochemical regulation systems of plants.
KW  - auxin
KW  - Arabidopsis thaliana
KW  - dendritic polymer
KW  - bioelectronics
KW  - polyelectrolyte
Y1  - 2017
U6  - https://doi.org/10.1073/pnas.1617758114
SN  - 0027-8424
VL  - 114
SP  - 4597
EP  - 4602
PB  - National Acad. of Sciences
CY  - Washington
ER  -