Phytochromes mediate germination inhibition under red, far-red, and white light in Aethionema arabicum
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F23%3A00575857" target="_blank" >RIV/61389030:_____/23:00575857 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/23:73622982
Result on the web
<a href="https://doi.org/10.1093/plphys/kiad138" target="_blank" >https://doi.org/10.1093/plphys/kiad138</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/plphys/kiad138" target="_blank" >10.1093/plphys/kiad138</a>
Alternative languages
Result language
angličtina
Original language name
Phytochromes mediate germination inhibition under red, far-red, and white light in Aethionema arabicum
Original language description
The view on the role of light during seed germination stems mainly from studies with Arabidopsis (Arabidopsis thaliana), where light is required to initiate this process. In contrast, white light is a strong inhibitor of germination in other plants, exemplified by accessions of Aethionema arabicum, another member of Brassicaceae. Their seeds respond to light with gene expression changes of key regulators converse to that of Arabidopsis, resulting in opposite hormone regulation and prevention of germination. However, the photoreceptors involved in this process in A. arabicum remain unknown. Here, we screened a mutant collection of A. arabicum and identified koy-1, a mutant that lost light inhibition of germination due to a deletion in the promoter of HEME OXYGENASE 1, the gene for a key enzyme in the biosynthesis of the phytochrome chromophore. koy-1 seeds were unresponsive to red- and far-red light and hyposensitive under white light. Comparison of hormone and gene expression between wild type and koy-1 revealed that very low light fluence stimulates germination, while high irradiance of red and far-red light is inhibitory, indicating a dual role of phytochromes in light-regulated seed germination. The mutation also affects the ratio between the 2 fruit morphs of A. arabicum, suggesting that light reception via phytochromes can fine-tune several parameters of propagation in adaptation to conditions in the habitat.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Plant Physiology
ISSN
0032-0889
e-ISSN
1532-2548
Volume of the periodical
192
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
19
Pages from-to
1584-1602
UT code for WoS article
000951075700001
EID of the result in the Scopus database
2-s2.0-85164415500