TY  - THES
A1  - Müller, Jörg
T1  - Response of bryophyte diversity to land-use and management in forest and grassland habitats
Y1  - 2014
ER  - 
TY  - THES
A1  - Soja, Aleksandra Maria
T1  - Transcriptomic and metabolomic analysis of Arabidopsis thaliana during abiotic stress
Y1  - 2014
ER  - 
TY  - THES
A1  - Sklodowski, Kamil
T1  - Regulation of plant potassium channels
Y1  - 2015
ER  - 
TY  - THES
A1  - Zhao, Liming
T1  - Characterization genes involved in leaf development and senescence of arabidopsis
Y1  - 2015
ER  - 
TY  - THES
A1  - Eggers, Ute
T1  - Environmental impacts on white stork (Ciconia ciconia) breeding success
BT  - a long-term study with a focus on effects of weather conditions at the breeding grounds
Y1  - 2014
ER  - 
TY  - JOUR
A1  - Pietra, Stefano
A1  - Lang, Patricia
A1  - Grebe, Markus
T1  - SABRE is required for stabilization of root hair patterning in Arabidopsis thaliana
JF  - Physiologia Plantarum
N2  - Patterned differentiation of distinct cell types is essential for the development of multicellular organisms. The root epidermis of Arabidopsis thaliana is composed of alternating files of root hair and non-hair cells and represents a model system for studying the control of cell-fate acquisition. Epidermal cell fate is regulated by a network of genes that translate positional information from the underlying cortical cell layer into a specific pattern of differentiated cells. While much is known about the genes of this network, new players continue to be discovered. Here we show that the SABRE (SAB) gene, known to mediate microtubule organization, anisotropic cell growth and planar polarity, has an effect on root epidermal hair cell patterning. Loss of SAB function results in ectopic root hair formation and destabilizes the expression of cell fate and differentiation markers in the root epidermis, including expression of the WEREWOLF (WER) and GLABRA2 (GL2) genes. Double mutant analysis reveal that wer and caprice (cpc) mutants, defective in core components of the epidermal patterning pathway, genetically interact with sab. This suggests that SAB may act on epidermal patterning upstream of WER and CPC. Hence, we provide evidence for a role of SAB in root epidermal patterning by affecting cell-fate stabilization. Our work opens the door for future studies addressing SAB-dependent functions of the cytoskeleton during root epidermal patterning.
Y1  - 2015
UR  - http://onlinelibrary.wiley.com/doi/10.1111/ppl.12257/epdf
U6  - https://doi.org/DOI: 10.1111/ppl.12257
VL  - 153
IS  - 3
SP  - 440
EP  - 453
ER  - 
TY  - JOUR
A1  - Kiefer, Christian S.
A1  - Claes, Andrea R.
A1  - Nzayisenga, Jean-Claude
A1  - Pietra, Stefano
A1  - Stanislas, Thomas
A1  - Ikeda, Yoshihisa
A1  - Grebe, Markus
T1  - Arabidopsis AIP1-2 restricted by WER-mediated patterning modulates planar polarity
JF  - Development
N2  - The coordination of cell polarity within the plane of the tissue layer (planar polarity) is crucial for the development of diverse multicellular organisms. Small Rac/Rho-family GTPases and the actin cytoskeleton contribute to planar polarity formation at sites of polarity establishment in animals and plants. Yet, upstream pathways coordinating planar polarity differ strikingly between kingdoms. In the root of Arabidopsis thaliana, a concentration gradient of the phytohormone auxin coordinates polar recruitment of Rho-of-plant (ROP) to sites of polar epidermal hair initiation. However, little is known about cytoskeletal components and interactions that contribute to this planar polarity or about their relation to the patterning machinery. Here, we show that ACTIN7 (ACT7) represents a main actin isoform required for planar polarity of root hair positioning, interacting with the negative modulator ACTIN-INTERACTING PROTEIN1-2 (AIP1-2). ACT7, AIP1-2 and their genetic interaction are required for coordinated planar polarity of ROP downstream of ethylene signalling. Strikingly, AIP1-2 displays hair cell file-enriched expression, restricted by WEREWOLF (WER)-dependent patterning and modified by ethylene and auxin action. Hence, our findings reveal AIP1-2, expressed under control of the WER-dependent patterning machinery and the ethylene signalling pathway, as a modulator of actin-mediated planar polarity.
KW  - AIP1
KW  - Actin
KW  - Arabidopsis
KW  - Patterning
KW  - Planar polarity
Y1  - 2015
UR  - http://dev.biologists.org/content/142/1/151.long
U6  - https://doi.org/doi: 10.1242/dev.111013
IS  - 142
SP  - 151
EP  - 161
ER  - 
TY  - THES
A1  - Pinchasik, Bat-El Shani
T1  - Manipulaton of Microbubbles Inspired by Bubble Use in Nature
KW  - fff
Y1  - 2015
ER  - 
TY  - THES
A1  - Prill, Sebastian
T1  - Real-Time in vitro toxicity monotoring in a microfluidic bioreactor for drug and chemical safety assessment
Y1  - 2015
ER  - 
TY  - THES
A1  - Kocyan, Alexander
T1  - Evolution within the speciose plant group of asparagales
BT  - insights from molecular and morphological data
Y1  - 2014
ER  -