UV-B Induced Generation of Reactive Oxygen Species Promotes Formation of BFA-Induced Compartments in Cells of Arabidopsis Root Apices

Frontiers in Plant Science
Ken YokawaFrantišek Baluška

Abstract

UV-B radiation is an important part of the electromagnetic spectrum emitted by the sun. For much of the period of biological evolution organisms have been exposed to UV radiation, and have developed diverse mechanisms to cope with this potential stress factor. Roots are usually shielded from exposure to UV by the surrounding soil, but may nevertheless be exposed to high energy radiation on the soil surface. Due to their high sensitivity to UV-B radiation, plant roots need to respond rapidly in order to minimize exposure on the surface. In addition to root gravitropism, effective light perception by roots has recently been discovered to be essential for triggering negative root phototropism in Arabidopsis. However, it is not fully understood how UV-B affects root growth and phototropism. Here, we report that UV-B induces rapid generation of reactive oxygen species which in turn promotes the formation of BFA-induced compartments in the Arabidopsis root apex. During unilateral UV-B irradiation of roots changes in auxin concentration on the illuminated side have been recorded. In conclusion, UV-B-induced and ROS-mediated stimulation of vesicle recycling promotes root growth and induces negative phototropism.

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Citations

May 4, 2017·International Journal of Molecular Sciences·Yanli QuYinglang Wan
Jul 10, 2019·Applied and Environmental Microbiology·Solange TorresJaime R Cabrera-Pardo
Apr 24, 2020·Frontiers in Plant Science·Ivan A PaponovKlaus Palme
Dec 19, 2020·Comprehensive Reviews in Food Science and Food Safety·Luxsika NgamwonglumlertVijaya Raghavan
Aug 17, 2021·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Deepika TripathiShashi Pandey-Rai

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