The effects of enhanced ultraviolet-B and nitrogen supply on growth, photosynthesis and nutrient status of Abies faxoniana seedlings

Yao, Xiaogang; Liu, Qing

doi:10.1007/s11738-008-0261-4

Cited by 20 publications

(6 citation statements)

References 29 publications

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“…Our results showed that the negative effect of UV-B radiation on the above ground biomass occurs under both low and high nitrogen. The presence of interaction between the two factors showed that the negative effect was more marked under high nitrogen implicating in an alteration in the sensitivity of plants under these conditions thus contrary to the results observed by YAO & LIU (2009). Our findings are in agreement with SINGH et al (2012) who suggested that increased sensitivity towards UV-B radiation may result where fertilisers are applied in excess of recommended levels.…”

Section: Resultssupporting

confidence: 88%

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status

et al. 2018

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Interaction effects between nitrogen and UV-B radiation were studied in sunflower (Helianthus annuus L. variety IAC-Iarama) plants grown in a greenhouse under natural photoperiod conditions. Plants were irradiated with 0.8W m-2 (control) or 8.0W m-2 (+UV-B) of UV-B radiation for 7h per day. The plants were grown in pots containing vermiculite and watered with 70% of full strength nitrogen-free Long Ashton solution, containing either low (42.3ppm) or high (282ppm) nitrogen as ammonium nitrate. High nitrogen increased dry matter of stem, leaves and shoot, photosynthetic pigments and photosynthesis (A) without any alteration in stomatal conductance (gs) nor transpiration (E) while it reduced the intercellular CO2 (Ci) concentration, and malondialdehyde (MDA) content. High UV-B radiation had negative effects on dry matter production, A, gs and E with the effects more marked under high nitrogen, whereas it increased Ci under high nitrogen. Activity of PG-POD was reduced by high UV-B radiation under low nitrogen but it was not changed under high nitrogen. The UV-B radiation increased the MDA content independently of nitrogen level. Results indicate that the effects of UV-B radiation on sunflower plants are dependent of nitrogen supply with high nitrogen making their physiological processes more sensitive to UV-B radiation.

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Section: Resultssupporting

confidence: 88%

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status

et al. 2018

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“…Curling of leaves, for example, aims at reducing the surface exposed to radiation [17]. It has also been observed that the increase in UV-B radiation in several species reduces the height of plants, the leaf fresh mass and area, the production of total biomass, and changes the morphology of leaves [18,19]. Negative effects of UV-B radiation can also be extended to other plant processes, including the reproductive ones.…”

Section: Introductionmentioning

confidence: 99%

UV-B Radiation Affects Photosynthesis-Related Processes of Two Italian Olea europaea (L.) Varieties Differently

Piccini

Cai

Dias

et al. 2020

Plants

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Given the economical importance of the olive tree it is essential to study its responses to stress agents such as excessive UV-B radiation, to understand the defense mechanisms and to identify the varieties that are able to cope with it. In the light of the analysis carried out in this study, we argue that UV-B radiation represents a dangerous source of stress for the olive tree, especially in the current increasingly changing environmental conditions. Both the varieties considered (Giarraffa and Olivastra Seggianese), although resistant to the strong treatment to which they were exposed, showed, albeit in different ways and at different times, evident effects. The two varieties have different response times and the Giarraffa variety seems better suited to prolonged UV-B stress, possible due to a more efficient and quick activation of the antioxidant response (e.g., flavonoids use to counteract reactive oxygen species) and because of its capacity to maintain the photosynthetic efficiency as well as a relatively higher content of mannitol. Moreover, pigments reduction after a long period of UV-B exposure can also be an adaptation mechanism triggered by Giarraffa to reduce energy absorption under UV-B stress. Olivastra Seggianese seems less suited to overcome UV-B stress for a long period (e.g., higher reduction of Fv/Fm) and has a higher requirement for sugars (e.g., glucose) possible to counteract stress and to restore energy.

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“…Abies faxoniana is distributed over its entire altitudinal range in the Wanglang Natural Reserve, thereby allowing for an exploration of how fir growth and recruitment varies with elevation. Abies faxoniana has been considered an ideal tree species to explore the influence of global change, including responses to enhanced UV-B radiation (Liu et al 2011) and nitrogen supply (Yao and Liu 2009;Liu et al 2011), elevated atmospheric CO 2 concentration and elevated temperature (Hou et al 2010(Hou et al , 2011Wang et al 2012). However, our knowledge of the effects of long-term climate variability on A. faxoniana in these subalpine forests is limited.…”

Section: Introductionmentioning

confidence: 99%

Climate constraints on growth and recruitment patterns of Abies faxoniana over altitudinal gradients in the Wanglang Natural Reserve, eastern Tibetan Plateau

Zhao

Eamus

et al. 2012

Aust. J. Bot.

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The radial growth and recruitment patterns of trees in subalpine areas are subject to the influence of changing environmental conditions associated with changes in elevation. To investigate responses of fir radial growth and recruitment to climate factors at different elevations, tree-ring width chronologies and age structures of Abies faxoniana were developed from five sampling sites at ~2800–3300 m elevation on the north-western and south-eastern aspects in the Wanglang Natural Reserve on the eastern edge of Tibetan Plateau. Statistical characteristics of the chronologies indicated that expressed population signal and signal-to-noise ratio increased with increasing elevation in the north-western aspect; the reverse was observed on the south-eastern aspect. Correlation analysis between chronologies and climate variables showed that fir radial growth was negatively correlated with previous growing season mean temperatures and was positively correlated with January precipitation in all plots. The amount of precipitation in the growing season (June and July) greatly influenced radial growth in the two lower sites of both the aspects. The three plots on the north-western aspect were characterised by significant rates of tree recruitment in the past five decades. There were multi-decadal periods of heightened recruitment over the past three centuries in the two south-eastern plots. Widespread disturbances after 1920s were not observed in any plots and the infrequent small-scale disturbances that occurred were not the main factors influencing recent recruitment in any plots. Correlation analysis between recruitment residuals and climate variables showed that fir seedling recruitment in the north-western aspect plots was mainly controlled by spring–summer temperatures. But recruitment was greatly restricted by competition with dense bamboos and other tree species in the south-eastern aspect. Overall, previous August mean temperature and January precipitation were the dominant factors determining fir radial growth in all plots, and recruitment was sensitive to spring–summer temperatures in the plots with sparse bamboo cover.

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The effects of enhanced ultraviolet-B and nitrogen supply on growth, photosynthesis and nutrient status of Abies faxoniana seedlings

Cited by 20 publications

References 29 publications

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status

UV-B Radiation Affects Photosynthesis-Related Processes of Two Italian Olea europaea (L.) Varieties Differently

Climate constraints on growth and recruitment patterns of Abies faxoniana over altitudinal gradients in the Wanglang Natural Reserve, eastern Tibetan Plateau

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