The Interaction of Ultraviolet-B Radiation and Water Deficit in Two Arabidopsis thaliana Genotypes

Schmidt, Anna-mary

doi:10.1006/anbo.1999.1085

Cited by 36 publications

(26 citation statements)

References 23 publications

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“…The induction of proline synthesis (Alexieva et al 2001;Hofmann et al 2003) and subsequent ABA accumulation (Yang et al 2000) has also been linked to drought tolerance for plants grown under UV-B radiation. Schmidt et al (2000) showed higher dehydrin proteins content for UV-B-sensitive mutants (fah1) but not for wild-type Arabidopsis in response to UV-B exposure. Dehydrins are a group of proteins that accumulate in plants and act to stabilize macromolecules in protoplasm under drought, chilling, freezing, salt, or other stresses (e.g.…”

Section: Discussionmentioning

confidence: 96%

“…UV-B radiation and drought stress have also been proposed to act synergistically as mild water stress offsets decreases in plant biomass induced by UV-B radiation in field-grown soybean (Sullivan and Teramura 1990), and cowpea (Balakumar et al 1993). Schmidt et al (2000) showed a decrease in drought-induced differences between d 13 C values and water loss for UV-B exposed Arabidopsis. Lower leaf area, which leads to less total plant transpiration and slower soil dehydration, has also been shown to lessen the severity of drought stress for UV-B grown plants ).…”

Section: Discussionmentioning

confidence: 97%

“…UV-B radiation has been shown to increase proline accumulation and drought tolerance in pea, wheat (Alexieva et al 2001) and clover (Hofmann et al 2003). Exposure of a UV-sensitive mutant of Arabidopsis to UV-B radiation increased production of dehydrin proteins, which may have contributed to increased drought tolerance for those plants (Schmidt et al 2000). The production of proteins similar to heat shock proteins in response to UV-B radiation has been reported for Vigna sinensis seedlings indicating that UV-B radiation may induce enhanced temperaturestress tolerance for plants (Nedunchezhian et al 1992).…”

Section: Introductionmentioning

confidence: 98%

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Response of photosynthesis to high light and drought for Arabidopsis thaliana grown under a UV-B enhanced light regime

2006

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Arabidopsis thaliana grown in a light regime that included ultraviolet-B (UV-B) radiation (6 kJ m(-2) d(-1)) had similar light-saturated photosynthetic rates but up to 50% lower stomatal conductance rates, as compared to plants grown without UV-B radiation. Growth responses of Arabidopsis to UV-B radiation included lower leaf area (25%) and biomass (10%) and higher UV-B absorbing compounds (30%) and chlorophyll content (52%). Lower stomatal conductance rates for plants grown with UV-B radiation were, in part, due to lower stomatal density on the adaxial surface. Plants grown with UV-B radiation had more capacity to down regulate photochemical efficiency of photosystem II (PSII) as shown by up to 25% lower phi(PSII) and 30% higher non-photochemical quenching of chlorophyll fluorescence under saturating light. These contributed to a smaller reduction in the maximum photochemical efficiency of PSII (F (v)/F (m)), greater dark-recovery of F (v)/F (m), and higher light-saturated carbon assimilation and stomatal conductance and transpiration rates after a four-hour high light treatment for plants grown with UV-B radiation. Plants grown with UV-B were more tolerant to a 12 day drought treatment than plants grown without UV-B as indicated by two times higher photosynthetic rates and 12% higher relative water content. UV-B-grown plants also had three times higher proline content. Higher tolerance to drought stress for Arabidopsis plants grown under UV-B radiation may be attributed to both increased proline content and decreased stomatal conductance. Growth of Arabidopsis in a UV-B-enhanced light regime increased tolerance to high light exposure and drought stress.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

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Response of photosynthesis to high light and drought for Arabidopsis thaliana grown under a UV-B enhanced light regime

2006

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“…Of the environmental variables, water availability is an important factor affecting UV-B responses in plants (Gwynn-Jones et al, 1999). Water limits could exacerbate UV-B effects (Drilias et al, 1997) and cause, e.g., increases in UV-B absorbing compounds and flavonol glycosides (Hofmann et al, 2003a) or a change in the sensitivity to UV-B (Balakumar et al, 1993;Petropoulou et al, 1995;Nogués et al, 1998;Nogués and Baker, 2000;Schmidt et al, 2000;Hofmann et al, 2003b). However, knowledge of such interactions and underlying functional relationships is still www.elsevier.com/locate/foreco Forest Ecology and Management 239 (2007) [112][113][114][115][116][117][118][119] mostly lacking.…”

Section: Introductionmentioning

confidence: 99%

The effect of drought and enhanced UV-B radiation on the growth and physiological traits of two contrasting poplar species

Ren

Dai

Xuan

et al. 2007

Forest Ecology and Management

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“…Some findings attribute the primary role for flavonoid induction to UV (Balakumar et al 1993), whereas other results suggest an interaction with water stress (Nogués et al 1998). Besides the accumulation of flavonoids, combined effect of drought stress and UV radiation can also exhibit another mechanisms of interactions as for example through accumulation of osmoregulator proline (Shetty et al 2002), or production of dehydrin proteins (Schmidt et al 2000), which may both contribute to increased drought tolerance.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic response of mountain grassland species to drought stress is affected by UV-induced accumulation of epidermal flavonols

Rapantová¹,

Klem²,

Holub³

et al. 2016

Beskydy

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Rapantová B., Klem K., Holub P., Novotná K., Urban O. 2016: Photosynthetic response of mountain grassland species to drought stress is affected by UV-induced accumulation of epidermal flavonols. -Beskydy, 9 (1-2): 31-40Interactive effects of drought and ultraviolet (UV) radiation on CO 2 assimilation rate and accumulation of epidermal flavonols were studied in two herbs (Hypericum maculatum and Rumex obtusifolius) and two grasses (Agrostis capillaris and Holcus mollis) under field conditions of Beskydy Mts. The main objective of this study was to evaluate a protective role of epidermal flavonols against drought stress. Experimental shelters were used to manipulate amount of incident precipitation and UV radiation intensity for 12 weeks (May-July). The light-saturated CO 2 assimilation rate (A max ) and the content of epidermal flavonols were regularly measured at intervals of 2-3 weeks during the entire period. Drought-induced reduction of A max was enhanced by high UV intensity in R. obtusifolius, whereas in other species UV radiation reduced a negative effect of drought. Generally, drought increased flavonol content in leaves as compared to non-stressed plants.Similarly, high UV intensities increased the flavonol content in control plants, but not in drought-stressed ones. Regression analysis between the flavonol content and A max revealed a positive correlation especially for A. capillaris and R. obtusifolius. In both species, a separation of these relationships was observed as the result of water availability. Thus lower A max were observed at the same flavonol content in drought-stressed plants when compared to control, well-watered counterparts. We conclude that UV-induced accumulation of epidermal flavonols can alleviate negative impacts of summer drought on photosynthesis, particularly in species with slower ontogeny like H. maculatum and A. capillaris.

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The Interaction of Ultraviolet-B Radiation and Water Deficit in Two Arabidopsis thaliana Genotypes

Cited by 36 publications

References 23 publications

Response of photosynthesis to high light and drought for Arabidopsis thaliana grown under a UV-B enhanced light regime

Response of photosynthesis to high light and drought for Arabidopsis thaliana grown under a UV-B enhanced light regime

The effect of drought and enhanced UV-B radiation on the growth and physiological traits of two contrasting poplar species

Photosynthetic response of mountain grassland species to drought stress is affected by UV-induced accumulation of epidermal flavonols

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