Ultraviolet‐B effects on transcript levels for photosynthetic genes are not mediated through carbohydrate metabolism

Mackerness, Soheila A.-H.; Surplus, S. L.; Jordan, Bill; Thomas, Brian

doi:10.1046/j.1365-3040.1997.d01-39.x

Cited by 19 publications

(10 citation statements)

References 39 publications

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“…As UV-B radiation treated plants are known to have a tendency to have a lower sink capacity (Correia et al, 2000), the observed decreases in the C content of leaves induced by UV-B radiation indicate that the main response is mediated by a lower net photosynthetic rate. Similar results have been reported by Mackerness et al (1997). In our study, compared with the low altitude population, the high altitude population exhibited a higher biomass accumulation, water-use efficiency as well as ABA accumulation, as affected by enhanced UV-B radiation, which indicates that the high altitude population is more responsive to enhanced UV-B radiation.…”

Section: The Growth and Physiological Responses As Affected By Enhancsupporting

confidence: 91%

Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Duan²,

Zhang³

et al. 2009

Ann. For. Sci.

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Keywords:carbon nitrogen ratio / photosynthetic nitrogen use efficiency / Populus cathayana / ultraviolet-b radiation / water use efficiency Abstract • The effects of drought, enhanced UV-B radiation and their combination on plant growth and physiological traits were investigated in a greenhouse experiment in two populations of Populus cathayana Rehder originating from high and low altitude in south-west China.• In both populations, drought significantly decreased biomass accumulation and gas exchange parameters, including net CO 2 assimilation rate (A), stomatal conductance (g s ), transpiration rate (E) and photosynthetic nitrogen use efficiency (PNUE). However, instantaneous water use efficiency (WUE i ), transpiration efficiency (WUE T ), carbon isotope composition (δ 13 C) and nitrogen (N) content, as well as the accumulation of soluble protein, UV-absorbing compounds and abscisic acid (ABA) significantly increased in response to drought. On the other hand, cuttings from both populations, when kept under enhanced UV-B radiation, showed very similar changes, as under drought, in all above-mentioned parameters.• Compared with the low altitude population, the high altitude population was more tolerant to drought and enhanced UV-B, as indicated by the higher level of biomass accumulation, gas exchange, water-use efficiency, ABA concentration and UV-absorbing compounds.• After one growing season of exposure to different UV-B levels and watering regimes, the decrease in biomass accumulation and gas exchange, induced by drought, was more pronounced under the combination of UV-B and drought. Significant interactions between drought and UV-B were observed in WUE i , WUE T , δ 13 C, soluble protein, UV-absorbing compounds, ABA and in the leaf and stem N, as well as in the leaf and stem C:N ratio.• Our results showed that UV-B acts as an important signal allowing P. cathayana seedlings to respond to drought and that the combination of drought and UV-B may cause synergistically detrimental effects on plant growth. Mots-clés :rapport carbone / azote / efficience photosynthétique d'utilisation de l'azote / Populus cathayana / rayonnement UV-B / efficience d'utilisation de l'eau Résumé -Variations intra-spécifiques de la réponse à la sécheresse de Populus cathayana sous atmosphère ambiante ou sous un rayonnement UV-B accru.• Les effets d'une sécheresse, d'une augmentation du rayonnement UV-B et de leur combinaison ont été étudiés sur la croissance et les caractéristiques physiologiques de plants de deux populations de Populus cathayana Rehder originaires de haute et basse altitude dans le sud-ouest de la Chine.• Dans les deux populations, la sécheresse a réduit de manière significative l'accumulation de biomasse et les échanges gazeux foliaires, y compris l'assimilation nette (A) de CO 2 , la conductance stomatique (g s ), la transpiration (E) et l'efficience photosynthétique d'utilisation de l'azote (PNUE). Toutefois, l'efficience instantanée d'utilisation de l'eau (WUE i ), l'efficience de transpiration (WUE T ), la com...

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Section: The Growth and Physiological Responses As Affected By Enhancsupporting

confidence: 91%

Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Duan²,

Zhang³

et al. 2009

Ann. For. Sci.

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“…To date, few studies have evaluated the effects of UV-B radiation on plant carbohydrate or fiber content. Decreased available carbohydrate concentrations at elevated UV-B levels have been reported for glucose in pea (Mackerness et al 1997), sucrose in mulberry (Yazawa et al 1992), and soluble carbohydrates in Pinus (Katzel et al 1996). Gehrke et al (1995), working with leaf litter from Vaccinium uliginosum, reported no effect of UV-B dose on soluble carbohydrates, but observed a decrease in cellulose concentrations.…”

Section: Discussionmentioning

confidence: 91%

Population differences in Trifolium repens L. response to ultraviolet-B radiation: foliar chemistry and consequences for two lepidopteran herbivores

Lindroth¹,

Hofmann

Campbell

et al. 2000

Oecologia

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White clover growing in New Zealand is experiencing increasing levels of ultraviolet-B (UV-B) radiation as a result of ozone depletion. We evaluated the effects of UV-B radiation on the foliar chemistry of two populations of white clover (Trifolium repens L.), 'Huia' and 'Tienshan,' and the consequences for the performance of armyworms (Spodoptera litura) and cutworms (Graphania mutans). Plants were grown in controlled environment rooms with and without supplemental UV-B radiation at a dose of 13.3 kJ m day, corresponding to a 25% mid-summer ozone depletion above Palmerston North, New Zealand. In both white clover populations, UV-B radiation elicited changes in foliar chemistry, including slight increases in nitrogen concentrations and decreases in carbohydrate concentrations. In addition, the 'Huia' population showed decreases in fiber concentrations and marked increases in cyanogenic activity. No change in UV-absorbing compounds was detected in either population. Long- and short-term feeding trials were conducted to assess dietary effects on insect growth, consumption, and food utilization. Changes in the performance of both insect species were generally small. The most pronounced effect was a 36% reduction in weight of S. litura after 2 weeks of feeding on Huia grown at high UV, but larval development times were only slightly prolonged and pupal weights were unaffected. S. litura short-term performance was affected by differences in white clover population. The long-term performance of G. mutans was not affected and its short-term performance (stadium duration and consumption rate) was only marginally affected by the high-UV treatment. We conclude that the effects of elevated UV-B radiation on white clover plant chemistry can be specific to certain plant populations. The differences in sensitivity of the two generalist insect species suggest that effects may also be specific to certain plant-herbivore associations. These results indicate that future UV-B herbivory studies should examine genotypic effects in both plants and animals.

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“…Indeed, ROS and plant hormones, SA, JA and ethylene have been shown to be key regulators of gene expression in response to UVB exposure. 122,[155][156][157] In plant responses to temperature stress, increase in ROS has been implicated. H 2 O 2 has been specifically involved in low temperature responses in plant.…”

Section: Seed Dormancymentioning

confidence: 99%

Oxidative signaling in seed germination and dormancy

El-Maarouf-Bouteau

Bailly²

2008

Plant Signaling & Behavior

340

233

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Reactive Oxygen Species (ROS) play a key role in various events of seed life. In orthodox seeds, ROS are produced from embryogenesis to germination, i.e., in metabolically active cells, but also in quiescent dry tissues during after ripening and storage, owing various mechanisms depending on the seed moisture content. Although ROS have been up to now widely considered as detrimental to seeds, recent advances in plant physiology signaling pathways has lead to reconsider their role. ROS accumulation can therefore be also beneficial for seed germination and seedling growth by regulating cellular growth, ensuring a protection against pathogens or controlling the cell redox status. ROS probably also act as a positive signal in seed dormancy release. They interact with abscisic acid and gibberellins transduction pathway and are likely to control numerous transcription factors and properties of specific protein through their carbonylation.

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Ultraviolet‐B effects on transcript levels for photosynthetic genes are not mediated through carbohydrate metabolism

Cited by 19 publications

References 39 publications

Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Population differences in Trifolium repens L. response to ultraviolet-B radiation: foliar chemistry and consequences for two lepidopteran herbivores

Oxidative signaling in seed germination and dormancy

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