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Your search keyword '"Simura, Jan"' showing total 18 results
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18 results on '"Simura, Jan"'

14. Flexible Organic Electronic Ion Pump for Flow‐Free Phytohormone Delivery into Vasculature of Intact Plants.

Author

Bernacka‐Wojcik, Iwona, Talide, Loïc, Abdel Aziz, Ilaria, Simura, Jan, Oikonomou, Vasileios K., Rossi, Stefano, Mohammadi, Mohsen, Dar, Abdul Manan, Seitanidou, Maria, Berggren, Magnus, Simon, Daniel T., Tybrandt, Klas, Jonsson, Magnus P., Ljung, Karin, Niittylä, Totte, and Stavrinidou, Eleni

Subjects
ABSCISIC acid, BLOOD vessels, STOMATA, PLANT cells & tissues, BLUE light, PLANT hormones, BIOELECTRONICS, PLANT engineering
Abstract

Plant vasculature transports molecules that play a crucial role in plant signaling including systemic responses and acclimation to diverse environmental conditions. Targeted controlled delivery of molecules to the vascular tissue can be a biomimetic way to induce long distance responses, providing a new tool for the fundamental studies and engineering of stress‐tolerant plants. Here, a flexible organic electronic ion pump, an electrophoretic delivery device, for controlled delivery of phytohormones directly in plant vascular tissue is developed. The c‐OEIP is based on polyimide‐coated glass capillaries that significantly enhance the mechanical robustness of these microscale devices while being minimally disruptive for the plant. The polyelectrolyte channel is based on low‐cost and commercially available precursors that can be photocured with blue light, establishing much cheaper and safer system than the state‐of‐the‐art. To trigger OEIP‐induced plant response, the phytohormone abscisic acid (ABA) in the petiole of intact Arabidopsis plants is delivered. ABA is one of the main phytohormones involved in plant stress responses and induces stomata closure under drought conditions to reduce water loss and prevent wilting. The OEIP‐mediated ABA delivery triggered fast and long‐lasting stomata closure far away from the delivery point demonstrating systemic vascular transport of the delivered ABA, verified delivering deuterium‐labeled ABA. [ABSTRACT FROM AUTHOR]

Published
2023
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18. HY5 and phytochrome activity modulate shoot-to-root coordination during thermomorphogenesis in Arabidopsis .

Author

Gaillochet C, Burko Y, Platre MP, Zhang L, Simura J, Willige BC, Kumar SV, Ljung K, Chory J, and Busch W

Subjects
Arabidopsis growth & development, Gene Expression Regulation, Plant genetics, Indoleacetic Acids metabolism, Phytochrome genetics, Plant Shoots genetics, Plant Shoots growth & development, Signal Transduction, Arabidopsis genetics, Arabidopsis Proteins genetics, Basic-Leucine Zipper Transcription Factors genetics, Morphogenesis genetics, Organogenesis, Plant genetics
Abstract

Temperature is one of the most impactful environmental factors to which plants adjust their growth and development. Although the regulation of temperature signaling has been extensively investigated for the aerial part of plants, much less is known and understood about how roots sense and modulate their growth in response to fluctuating temperatures. Here, we found that shoot and root growth responses to high ambient temperature are coordinated during early seedling development in Arabidopsis A shoot signaling module that includes HY5, the phytochromes and the PIFs exerts a central function in coupling these growth responses and maintaining auxin levels in the root. In addition to the HY5/PIF-dependent shoot module, a regulatory axis composed of auxin biosynthesis and auxin perception factors controls root responses to high ambient temperature. Taken together, our findings show that shoot and root developmental responses to temperature are tightly coupled during thermomorphogenesis and suggest that roots integrate energy signals with local hormonal inputs., Competing Interests: Competing interestsThe authors declare no competing or financial interests., (© 2020. Published by The Company of Biologists Ltd.)

Published
2020
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