Growth and physiological responses of cotton (<i>Gossypium hirsutum</i> L.) to elevated carbon dioxide and ultraviolet‐B radiation under controlled environmental conditions

Zhao, Duli; Reddy, K. Raja; Kakani, Vijaya Gopal; Read, John J.; Sullivan, Joe H.

doi:10.1046/j.1365-3040.2003.01019.x

Cited by 119 publications

(99 citation statements)

References 46 publications

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“…These results are in agreement with previous studies that indicated no UV-B effects on growth under field and growth chamber (HAKADA et al, 2002;ZHAO et al, 2003). In a recent review by KAKANI et al (2003b), shows that in 54% of 40 studies under greenhouse, growth chamber or field conditions reported a redution of biomass by elevated UV-B radiation while 35% of the studies reported no effect.…”

Section: Resultssupporting

confidence: 91%

Growth and physiological responses of sunflower plants exposed to ultraviolet-B radiation

2007

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Section: Resultssupporting

confidence: 91%

Growth and physiological responses of sunflower plants exposed to ultraviolet-B radiation

2007

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“…Our results showed that UV-B radiation acts as an important signal allowing P. cathayana seedlings to respond to drought and that the combination of drought and UV-B radiation may cause synergistically detrimental effects on plant growth in both low and high altitude populations. The levels of UV-B radiation used in this study (12.4 kJ m −2 d −1 ) are similar to the amount of radiation experienced in the eastern Himalaya with a 25% stratospheric ozone reduction during a clear day around summer solstice according to a mathematical model by Madronich et al (1995) but lower than the amount expected to occur with a 30% depletion in the stratospheric ozone (15.1 kJ m −2 d −1 ) (Zhao et al, 2003). We conclude that P. cathayana seedlings will show symptoms of an UV-B stress if the intensity of UV-B radiation will increase in the future.…”

Section: The Growth and Physiological Responses As Affected By The Cosupporting

confidence: 65%

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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“…In such a situation, starch degradation can be the main cause for an increase in WSC. Barsig and Malz (2000) and Zhao et al (2003) observed a decrease in soluble carbohydrates in Zea mays L. (sugar maize) and Gossypium hirsutum L. (cotton), which is contrary to our findings. Additionally, our results show increased WSC, in contrast to some previous studies by Yazawa et al (1992) and Quaggiotti et al (2004).…”

Section: Effect Of Uv-b On the Growth Of V Giganteacontrasting

confidence: 99%

Carbon and nitrogen partitioning in the freshwater submerged macrophyte Vallisneria gigantea in response to ultraviolet-B irradiance

Kasige

Asaeda

2008

Aquat Ecol

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The aim of this study was to determine the effect of ultraviolet-B (UV-B) exposures (0.55 and 1.1 W m -2 ) on the distributional variations of plant carbon and nitrogen content in both below-and aboveground parts in Vallisneria gigantea Graebner in laboratory conditions for a 3-month period. Plant biomass, total organic nitrogen, total organic carbon, lignin, water soluble carbohydrates and chlorophyll a and b were analysed and compared using repeated measures of analysis of variance (ANOVA) between UV-B-exposed and nonexposed treatments. A significant reduction (F (2, 15) = 754.5, P \ 0.001) was observed in leaf chlorophyll a concentrations at UV-B exposure levels. In the high UV-B irradiation group, a significant decrease (50.3%) was observed compared with the initial aboveground biomass. The total organic nitrogen content at both high and low UV-B exposure levels declined significantly by 25.6% and 24.3%, respectively, in aboveground samples, while significant increases of 39.6% and 40%, respectively, were observed in belowground tissues, compared with non-UV-B treatment groups. The partitioning of total organic carbon in the aboveground tissues was reflected by significant increase in lignin and water soluble carbohydrates in aboveground tissues under UV-B stress. However, total organic nitrogen demonstrated greater partitioning into the belowground tissues of V. gigantea. This study highlights the defense mechanisms of V. gigantea through changes in the percentage composition of carbon and nitrogen compounds with negative effects on nutrient regeneration, which can be accelerated in a system exposed to UV-B irradiation at or above biologically effective levels.

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Growth and physiological responses of cotton (Gossypium hirsutum L.) to elevated carbon dioxide and ultraviolet‐B radiation under controlled environmental conditions

Abstract: ABSTRACT

Cited by 119 publications

References 46 publications

Growth and physiological responses of sunflower plants exposed to ultraviolet-B radiation

Growth and physiological responses of sunflower plants exposed to ultraviolet-B radiation

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

Carbon and nitrogen partitioning in the freshwater submerged macrophyte Vallisneria gigantea in response to ultraviolet-B irradiance

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