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8 results on '"Velasquez, Silvia Melina"'

1. Molecular link between auxin and ROS-mediated polar growth

Author

Mangano, Silvina, Denita-Juarez, Silvina Paola, Choi, Hee-Seung, Marzol, Eliana, Hwang, Youra, Ranocha, Philippe, Velasquez, Silvia Melina, Borassi, Cecilia, Barberini, María Laura, Aptekmann, Ariel Alejandro, Muschietti, Jorge Prometeo, Nadra, Alejandro Daniel, Dunand, Christophe, Cho, Hyung-Taeg, and Estevez, José Manuel

Published
2017

3. Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants

Author

Velasquez, Silvia Melina, primary, Guo, Xiaoyuan, additional, Gallemi, Marçal, additional, Aryal, Bibek, additional, Venhuizen, Peter, additional, Barbez, Elke, additional, Dünser, Kai Alexander, additional, Darino, Martin, additional, Pĕnčík, Aleš, additional, Novák, Ondřej, additional, Kalyna, Maria, additional, Mouille, Gregory, additional, Benková, Eva, additional, P. Bhalerao, Rishikesh, additional, Mravec, Jozef, additional, and Kleine-Vehn, Jürgen, additional

Published
2021
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4. Xyloglucan remodeling defines auxin-dependent differential tissue expansion in plants

Author

Velasquez, Silvia Melina, Guo, Xiaoyuan, Gallemi, Marçal, Aryal, Bibek, Venhuizen, Peter, Barbez, Elke, Dünser, Kai Alexander, Darino, Martin, Pӗnčík, Aleš, Novák, Ondřej, Kalyna, Maria, Mouille, Gregory, Benková, Eva, Bhalerao, Rishikesh P., Mravec, Jozef, Kleine-Vehn, Jürgen, Velasquez, Silvia Melina, Guo, Xiaoyuan, Gallemi, Marçal, Aryal, Bibek, Venhuizen, Peter, Barbez, Elke, Dünser, Kai Alexander, Darino, Martin, Pӗnčík, Aleš, Novák, Ondřej, Kalyna, Maria, Mouille, Gregory, Benková, Eva, Bhalerao, Rishikesh P., Mravec, Jozef, and Kleine-Vehn, Jürgen

Abstract

Size control is a fundamental question in biology, showing incremental complexity in plants, whose cells possess a rigid cell wall. The phytohormone auxin is a vital growth regulator with central importance for differential growth control. Our results indicate that auxin-reliant growth programs affect the molecular complexity of xyloglucans, the major type of cell wall hemi-cellulose in eudicots. Auxin-dependent induction and repression of growth coincide with reduced and enhanced molecular complexity of xyloglucans, respectively. In agreement with a proposed function in growth control, genetic interference with xyloglucan side decorations distinctly modulates auxin-dependent differential growth rates. Our work proposes that auxin-dependent growth programs have a spatially defined effect on xyloglucan’s molecular structure, which in turn affects cell wall mechanics and specifies differential, gravitropic hypocotyl growth.

Published
2021

5. Auxin-dependent xyloglucan remodelling defines differential tissue expansion in Arabidopsis thaliana

Author

Velasquez, Silvia Melina, Gallemi, Marçal, Aryal, Bibek, Venhuizen, Peter, Barbez, Elke, Dünser, Kai, Kalyna, Maria, Mouille, Grégory, Benkova, Eva, Bhalerao, Rishikesh, and Kleine-Vehn, Jürgen

Subjects
fungi, food and beverages
Abstract

Size control is a fundamental question in biology, showing incremental complexity in case of cell wall surrounded plant cells. Here we show that auxin signalling restricts the complexity of extracellular xyloglucans, which defines cell wall properties and tissue expansion. Our work uncovers an alternative mechanism of how the phytohormone auxin modulates the cell wall for steering differential growth control in gravitropic hypocotyls.

Published
2019
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6. Xyloglucan remodelling defines differential tissue expansion in plants

Author

Velasquez, Silvia Melina, primary, Guo, Xiaoyuan, additional, Gallemi, Marçal, additional, Aryal, Bibek, additional, Venhuizen, Peter, additional, Barbez, Elke, additional, Dünser, Kai, additional, Darino, Martin, additional, Pӗnčik, Aleš, additional, Novák, Ondřej, additional, Kalyna, Maria, additional, Mouille, Grégory, additional, Benkova, Eva, additional, Bhalerao, Rishikesh, additional, Mravec, Jozef, additional, and Kleine-Vehn, Jürgen, additional

Published
2019
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7. The molecular link between auxin and ROS-Mediated polar root hair growth

Author

Mangano, Silvina, primary, Denita-Juarez, Silvina Paola, additional, Choi, Hee-Seung, additional, Marzol, Eliana, additional, Hwang, Youra, additional, Ranocha, Philippe, additional, Velasquez, Silvia Melina, additional, Borassi, Cecilia, additional, Barberini, María Laura, additional, Aptekmann, Ariel Alejandro, additional, Muschietti, Jorge Prometeo, additional, Nadra, Alejandro Daniel, additional, Dunand, Christophe, additional, Cho, Hyung-Taeg, additional, and Estevez, José Manuel, additional

Published
2017
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