Solar UV-B and UV-A with λ ≤ 350 nm are perceived through uvr8: What are the implications?

Beskrivning

We have demonstrated that uvr8 plays an important role in the perception of solar UV-A radiation in addition to its earlier described role in solar UV-B radiation (1, 3, 4). These studies also indicated that BL and UV-Alw (λ > 350 nm) perceived through crys may downregulate uvr8-mediated responses to UV-B and UV-Asw (λ ≤ 350 nm) radiation. That responses to UV-Asw and UV-Alw require different photoreceptors make questionable the use of UV-B and UV-A definitions in the ISO standard to define treatments or describe plant growing conditions in plant-photomorphogenesis studies. Most earlier studies of plants’ responses have considered UV-A as one, expecting similar responses to UV-Asw and UV-Alw. Future studies should distinguish these two wavebands e.g., use filters with cut-off at 350 nm, as we have done successfully in our recent studies (e.g. 1, 2, 3, 4). However, at this point it is also important to remind ourselves of the many questions and difficulties that remain unresolved. The data from our studies have provided strong evidence for some key questions. New starts to the analysis of these same large data sets and of data from earlier studies that I will present shed light on what we need to study next and suggest how we could do it. A key question I will consider is the relevance of polychromatic vs. monochromatic action spectra and the use solar radiation vs. artificial light. These considerations depend on the aims and approaches of different studies. In our case these different types of experiments complemented each other facilitating new insights and providing complementary evidence. (1) Morales et al. (2013) Plant Phys. https://doi.org/10.1104/pp.112.211375 (2) Siipola et al. (2015) Plant Cell Envir. https://doi.org/10.1111/pce.12403 (3) Rai et al. (2019) J. Exp. Bot. https://doi.org/10.1093/jxb/erz236 (4) Rai et al. (2020) BioRxiv. https://biorxiv.org/cgi/content/short/2020.01.21.913814

Period	15 okt. 2020
Evenemangstitel	UV4Plants 3rd Network Meeting: Plant responses to UV radiation – Diversity in time and space
Typ av evenemang	Konferens
Plats	Kiel, TysklandVisa på karta
Omfattning	Internationell