UV-B overexposure induces programmed cell death in a BY-2 tobacco cell line

Lytvyn, Dmytro I.; Yemets, А. І.; Blume, Ya. B.

doi:10.1016/j.envexpbot.2009.11.004

Cited by 62 publications

(45 citation statements)

References 41 publications

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“…Disruption of plant microtubules induced by enhanced UV-B radiation is accompanied by cell shrinkage, chromatin condensation, and cytoplasmic vacuolation in both interphase and the mitotic phase (Lytvyn et al, 2010). Plant microtubules also participate in UV-B signaling pathways as a responsive factor (Krasylenko et al, 2013 ) causes depolymerization of cortical microtubules and aggregation of arrays of spindle microtubules (Guo et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of Enhanced Ultraviolet-B Radiation on Chromosomes and Microtubule Arrays in Wheat Roots

Chen¹,

Chen²,

Han³

2016

IJAB

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To cite this paper: Chen, P.X., H. Chen and R. Han, 2016 AbstractEnhanced ultraviolet-B (UV-B) radiation causes chromosomal aberrations and abnormal microtubule arrays in wheat (Triticum aestivum) root cells. Oryzalin induces chromosome doubling through depolymerization of microtubules and results in diploidization. We explored the effect of oryzalin on wheat roots exposed to enhanced UV-B radiation. Treatment with 500 µmol·L −1 oryzalin resulted in chromosome doubling with two equal nuclei. However, exposure to UV-B radiation in combination with oryzalin resulted in two unequal nuclei. The frequency of unequal nuclei caused by treatment with UV-B and oryzalin was higher than that caused by UV-B exposure alone. During the mitotic phase, chromosomal aberrations were indicated to be independent of abnormal microtubule structures. These suggested that chromosomal aberrations caused by enhanced UV-B radiation were not a consequence of abnormal microtubule structures.

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Section: Introductionmentioning

confidence: 99%

Effects of Enhanced Ultraviolet-B Radiation on Chromosomes and Microtubule Arrays in Wheat Roots

Chen¹,

Chen²,

Han³

2016

IJAB

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“…The higher doses of UV-B can induce oligonucleosomal DNA fragmentation like a typical apoptotic DNA ladder (Lytvyn et al 2010). DNA laddering is an integral part of programmed cell death (PCD) in plant systems, confirming the role of UV-B in induction of PCD.…”

Section: Programmed Cell Deathmentioning

confidence: 99%

Plant Response to UV-B: From Tolerance to Toxicity

Singh

Agrawal

2015

Stress Responses in Plants

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In higher plants, UV-B is known to have two very diverse effects: one in response to the evoked damage and the other in response to the perception of UV-B by postulated receptor, leading to UV-B-induced photomorphogenesis and thus acclimation. The UV-B-specific pathway involves the UVR8-COP1-HY5 pathway. The response depends on wavelength, fluence rate, and duration of the UV-B radiation as well as the extent of adaptation. On the other hand, the damage response pathway includes activation of more general stress responses.

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“…ROS production induced via UV-B irradiation alters the pattern of gene expression with regard to antioxidative enzymes [7] and induces protective events such as flavonoid or anthocyanin synthesis [8][9][10] to protect cells. It is well known that excess amounts of ROS burst due to UV-B irradiation result in fatal damage to plant cells or programmed cell death [11]. It was reported that UV-B inhibits growth of Arabidopsis seedlings, including mutants with cryptochrome, phytochrome, or phototropin deficiency, suggesting that the plant UV-B response is a consequence of direct damage to DNA [12].…”

Section: Effect Of Uv-b On Plantsmentioning

confidence: 99%

UV‐B Perception in Plant Roots

Yokawa

Baluška

2013

Climate Change and Plant Abiotic Stress Tolerance

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Sunlight reaching the surface of the Earth contains electromagnetic radiation in the far-red, visible, and ultraviolet (UV) wavelength regions. Photons in the UV region possess high energy compared to long-wavelength light and cause photon-induced damage to living organisms. The energy of UV-B (280-315 nm) is the highest of all wavelengths of sunlight going through into the troposphere. Hence, most terrestrial plants are continuously exposed to harmful UV-B light during the daytime and have been evolving under these circumstances. Recently, it has been reported that receptors found in plant roots are involved in UV-B perception and play important roles in cellular signaling. As roots are naturally in darkness, they have been thought not to require UV-B light sensory abilities. In this chapter, we focus on a biological mystery: why have roots evolved sophisticated abilities of UV-B light recognition? 11.

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UV-B overexposure induces programmed cell death in a BY-2 tobacco cell line

Cited by 62 publications

References 41 publications

Effects of Enhanced Ultraviolet-B Radiation on Chromosomes and Microtubule Arrays in Wheat Roots

Effects of Enhanced Ultraviolet-B Radiation on Chromosomes and Microtubule Arrays in Wheat Roots

Plant Response to UV-B: From Tolerance to Toxicity

UV‐B Perception in Plant Roots

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