Plants use hydrogen peroxide(H_(2)O_(2))and variation potential(VP)waves as well as chemical transport by transpiration-driven xylem flow to facilitate cell signaling,cell-to-cell communication,and adaptation to envir...Plants use hydrogen peroxide(H_(2)O_(2))and variation potential(VP)waves as well as chemical transport by transpiration-driven xylem flow to facilitate cell signaling,cell-to-cell communication,and adaptation to environmental stresses.The underlying mechanisms and complex interplay among H_(2)O_(2),VP,and transpiration are not clearly understood because of the lack of bioengineering tools for continuous in planta monitoring of the dynamic biological processes.Here,we tackle the challenge by developing microfibershaped organic electrochemical transistors(fOECTs)that can be threaded into the plants.The sensorized microfiber revealed that both H_(2)O_(2)and VP waves propagate faster toward the leaves than toward the roots because of the directional long-distance transport of H_(2)O_(2)in the xylem.In addition,the revealed interplays among VP,H_(2)O_(2),and xylem flow strongly suggest a transpiration-and intensity-dependent H_(2)O_(2)-VP mutual-reinforcing propagation mechanism.The microfiber electronics offer a versatile platform for the in situ study of dynamic physiological processes in plants with high temporospatial resolution.展开更多
基金supported by the Singapore Indoor Farming System(SingFarm)CREATE Initiative(024574-00005)from the National Research Foundation of Singaporea National University of Singapore Presidential Young Professorship Award(22-4974-A0003).
文摘Plants use hydrogen peroxide(H_(2)O_(2))and variation potential(VP)waves as well as chemical transport by transpiration-driven xylem flow to facilitate cell signaling,cell-to-cell communication,and adaptation to environmental stresses.The underlying mechanisms and complex interplay among H_(2)O_(2),VP,and transpiration are not clearly understood because of the lack of bioengineering tools for continuous in planta monitoring of the dynamic biological processes.Here,we tackle the challenge by developing microfibershaped organic electrochemical transistors(fOECTs)that can be threaded into the plants.The sensorized microfiber revealed that both H_(2)O_(2)and VP waves propagate faster toward the leaves than toward the roots because of the directional long-distance transport of H_(2)O_(2)in the xylem.In addition,the revealed interplays among VP,H_(2)O_(2),and xylem flow strongly suggest a transpiration-and intensity-dependent H_(2)O_(2)-VP mutual-reinforcing propagation mechanism.The microfiber electronics offer a versatile platform for the in situ study of dynamic physiological processes in plants with high temporospatial resolution.
