UV-Induced Cell Death in Plants
| Autor: | Punyakishore Maibam, Junghoon Park, Sang Yeol Lee, Vaidurya Pratap Sahi, Chang Ho Kang, Ganesh M. Nawkar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Programmed cell death
UVR8 Ultraviolet Rays Arabidopsis Plant Development Review Mitochondrion medicine.disease_cause reactive oxygen species (ROS) Catalysis UV radiation Inorganic Chemistry lcsh:Chemistry chemistry.chemical_compound Gene Expression Regulation Plant Plant Cells medicine Physical and Theoretical Chemistry Photosynthesis Molecular Biology lcsh:QH301-705.5 Spectroscopy Plant Proteins chemistry.chemical_classification Reactive oxygen species biology Cell Death Models Genetic Jasmonic acid Organic Chemistry General Medicine Plants biology.organism_classification Computer Science Applications Cell biology Chloroplast chemistry Biochemistry lcsh:Biology (General) lcsh:QD1-999 Oxidative stress |
| Zdroj: | International Journal of Molecular Sciences International Journal of Molecular Sciences, Vol 14, Iss 1, Pp 1608-1628 (2013) |
| ISSN: | 1422-0067 |
| Popis: | Plants are photosynthetic organisms that depend on sunlight for energy. Plants respond to light through different photoreceptors and show photomorphogenic development. Apart from Photosynthetically Active Radiation (PAR; 400–700 nm), plants are exposed to UV light, which is comprised of UV-C (below 280 nm), UV-B (280–320 nm) and UV-A (320–390 nm). The atmospheric ozone layer protects UV-C radiation from reaching earth while the UVR8 protein acts as a receptor for UV-B radiation. Low levels of UV-B exposure initiate signaling through UVR8 and induce secondary metabolite genes involved in protection against UV while higher dosages are very detrimental to plants. It has also been reported that genes involved in MAPK cascade help the plant in providing tolerance against UV radiation. The important targets of UV radiation in plant cells are DNA, lipids and proteins and also vital processes such as photosynthesis. Recent studies showed that, in response to UV radiation, mitochondria and chloroplasts produce a reactive oxygen species (ROS). Arabidopsis metacaspase-8 (AtMC8) is induced in response to oxidative stress caused by ROS, which acts downstream of the radical induced cell death (AtRCD1) gene making plants vulnerable to cell death. The studies on salicylic and jasmonic acid signaling mutants revealed that SA and JA regulate the ROS level and antagonize ROS mediated cell death. Recently, molecular studies have revealed genes involved in response to UV exposure, with respect to programmed cell death (PCD). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|