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Full-Text Articles in Physical Sciences and Mathematics
Trans-Cinnamic Acid-Induced Leaf Expansion Involves An Auxin-Independent Component, Jasmina Kurepa, Jan A. Smalle
Trans-Cinnamic Acid-Induced Leaf Expansion Involves An Auxin-Independent Component, Jasmina Kurepa, Jan A. Smalle
Plant and Soil Sciences Faculty Publications
The phenylpropanoid pathway, the source of a large array of compounds with diverse functions, starts with the synthesis of trans-cinnamic acid (t-CA) that is converted by cinnamate-4-hydroxylase (C4H) into p-coumaric acid. We have recently shown that in Arabidopsis, exogenous t-CA promotes leaf growth by increasing cell expansion and that this response requires auxin signaling. We have also shown that cell expansion is increased in C4H loss-of-function mutants. Here we provide further evidence that leaf growth is enhanced by either t-CA or a t-CA derivative that accumulates upstream of C4H. We also show that …
Modulation Of Auxin And Cytokinin Responses By Early Steps Of The Phenylpropanoid Pathway, Jasmina Kurepa, Timothy E. Shull, Sumudu S. Karunadasa, Jan A. Smalle
Modulation Of Auxin And Cytokinin Responses By Early Steps Of The Phenylpropanoid Pathway, Jasmina Kurepa, Timothy E. Shull, Sumudu S. Karunadasa, Jan A. Smalle
Plant and Soil Sciences Faculty Publications
Background: The phenylpropanoid pathway is responsible for the synthesis of numerous compounds important for plant growth and responses to the environment. In the first committed step of phenylpropanoid biosynthesis, the enzyme phenylalanine ammonia-lyase (PAL) deaminates L-phenylalanine into trans-cinnamic acid that is then converted into p-coumaric acid by cinnamate-4-hydroxylase (C4H). Recent studies showed that the Kelch repeat F-box (KFB) protein family of ubiquitin ligases control phenylpropanoid biosynthesis by promoting the proteolysis of PAL. However, this ubiquitin ligase family, alternatively named Kiss Me Deadly (KMD), was also implicated in cytokinin signaling as it was shown to promote the degradation of …
Iac Gene Expression In The Indole-3-Acetic Acid-Degrading Soil Bacterium Enterobacter Soli Lf7, Isaac V. Greenhut, Beryl L. Slezak, Johan H. J. Leveau
Iac Gene Expression In The Indole-3-Acetic Acid-Degrading Soil Bacterium Enterobacter Soli Lf7, Isaac V. Greenhut, Beryl L. Slezak, Johan H. J. Leveau
Plant and Soil Sciences Faculty Publications
We show for soil bacterium Enterobacter soli LF7 that the possession of an indole-3-acetic acid catabolic (iac) gene cluster is causatively linked to the ability to utilize the plant hormone indole-3-acetic acid (IAA) as a carbon and energy source. Genome-wide transcriptional profiling by mRNA sequencing revealed that these iac genes, chromosomally arranged as iacHABICDEFG and coding for the transformation of IAA to catechol, were the most highly induced (>29-fold) among the relatively few (iac cluster were genes for a major facilitator superfamily protein (mfs) and enzymes of the β-ketoadipate pathway (pcaIJD-catBCA), which channels …
Insights Into Land Plant Evolution Garnered From The Marchantia Polymorpha Genome, John L. Bowman, Takayuki Kohchi, Katsuyuki T. Yamato, Jerry Jenkins, Shengqiang Shu, Kimitsune Ishizaki, Shohei Yamaoka, Ryuichi Nishihama, Yasukazu Nakamura, Frédéric Berger, Catherine Adam, Shiori Sugamata Aki, Felix Althoff, Takashi Araki, Mario A. Arteaga-Vazquez, Sureshkumar Balasubrmanian, Kerrie Barry, Diane Bauer, Christian R. Boehm, Liam Briginshaw, Juan Caballero-Perez, Bruno Catarino, Feng Chen, Shota Chiyoda, Mansi Chovatia, Kevin M. Davies, Mihails Delmans, Taku Demura, Tom Dierschke, Liam Dolan, Tomokazu Kawashima
Insights Into Land Plant Evolution Garnered From The Marchantia Polymorpha Genome, John L. Bowman, Takayuki Kohchi, Katsuyuki T. Yamato, Jerry Jenkins, Shengqiang Shu, Kimitsune Ishizaki, Shohei Yamaoka, Ryuichi Nishihama, Yasukazu Nakamura, Frédéric Berger, Catherine Adam, Shiori Sugamata Aki, Felix Althoff, Takashi Araki, Mario A. Arteaga-Vazquez, Sureshkumar Balasubrmanian, Kerrie Barry, Diane Bauer, Christian R. Boehm, Liam Briginshaw, Juan Caballero-Perez, Bruno Catarino, Feng Chen, Shota Chiyoda, Mansi Chovatia, Kevin M. Davies, Mihails Delmans, Taku Demura, Tom Dierschke, Liam Dolan, Tomokazu Kawashima
Plant and Soil Sciences Faculty Publications
The evolution of land flora transformed the terrestrial environment. Land plants evolved from an ancestral charophycean alga from which they inherited developmental, biochemical, and cell biological attributes. Additional biochemical and physiological adaptations to land, and a life cycle with an alternation between multicellular haploid and diploid generations that facilitated efficient dispersal of desiccation tolerant spores, evolved in the ancestral land plant. We analyzed the genome of the liverwort Marchantia polymorpha, a member of a basal land plant lineage. Relative to charophycean algae, land plant genomes are characterized by genes encoding novel biochemical pathways, new phytohormone signaling pathways (notably auxin), …