Effects of ultraviolet-B radiation on common bean (Phaseolus vulgaris L.) plants grown under nitrogen deficiency

Riquelme, Alejandro; Wellmann, Eckard; Pinto, Manuel

doi:10.1016/j.envexpbot.2006.12.004

Cited by 13 publications

(10 citation statements)

References 39 publications

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“…Decreases in the SL and LA observed in this experiment (Fig. 1) were similar to previously published results (Riquelme et al 2007) for soybean grown under supplemental UV-B radiation. Wang et al (2007) also showed that UV-B radiation affected the growth and physiology of some weed species.…”

Section: Discussionsupporting

confidence: 92%

Growth, Physiological Attributes and Antioxidant Enzyme Activities in Soybean Seedlings Treated With or Without Silicon Under UV‐B Radiation Stress

Shen

et al. 2010

J Agronomy Crop Science

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Silicon (Si) can increase plant defence systems against abiotic and biotic stress, but there is little information on UV‐B radiation stress alleviation by Si for field crops. Using soybean (Glycine max (L.) Mell) seedlings, we determined how Si may mediate UV‐B radiation stress by studying changes in biomass, physiological attributes and antioxidants’ activities. The seedlings were raised with 0, 1.70 and 2.55 mm of Si in the growth chamber under ambient, ambient +2.7 kJ m−2 day and ambient +5.4 kJ m−2 day of UV‐B radiation. As expected, plants suffered severe growth limitations under UV‐B radiation, but Si alleviated these limitations through improvements in leaf area (LA) and root‐to‐shoot ratio (R/S). The UV‐B radiation stress reduced the LA by 73.9–94.7%, total dry weight (TDW) by 11.8–36.6% and R/S by 9.2–30.2% but induced the activities of soluble protein by 18.4–21.0%, catalase (CAT) by 22.7–54.2%, superoxide dismutase (SOD) by 31.9–63.1%, and peroxidases (POD) by as much as 162.9–381.6%. Further confirmation of stress alleviations by Si was noted from reductions in these stress signals (antioxidant activities) under UV‐B radiation: CAT decreased significantly by 78.3–79.4%, SOD by 5.3–7.2% and POD by 49.9–61.9% in silicon‐treated UV‐B stressed soybean.

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Section: Discussionsupporting

confidence: 92%

Growth, Physiological Attributes and Antioxidant Enzyme Activities in Soybean Seedlings Treated With or Without Silicon Under UV‐B Radiation Stress

Shen

et al. 2010

J Agronomy Crop Science

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“…According to SINGH et al 2012, individual nutrient applied at higher than recommended dose made the plants more susceptible to UV-B radiation compared to NPK combination. Our results contrast with those reported by RIQUELME et al (2007) who observed that the UV-B in common bean was effective in reducing photosynthesis only when it was accompanied by nitrogen restriction. In addition, they reported that under these conditions photosynthesis was correlated with a decrease in g s rather than with a decrease in Rubisco activity.…”

Section: Nscontrasting

confidence: 99%

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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“…Compounds capable of absorbing this radiation, such as flavonoids and sinapic esters, protect because their strong absorption between 280 and 340 nm. Also, flavonoids scavenge free-radical, offering additional protection to cells (Jansen et al 1998, Riquelme et al, 2007. Despite the photoprotective mechanism, a reduction of chlorophyll a and carotenoids content was observed, a possible consequence of the high amount of energy released by UV-B radiation that reaches the leaves causing overload of photosynthetic processes and low CO2 assimilation yield.…”

Section: Discussionmentioning

confidence: 99%

How does UV-B radiation affect the initial growth of common bean (Phaseolus vulgaris L.)? Physiological and structural aspects

Wanzeler

Zanetti

Fantinato

et al. 2019

BJD

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ABCTRACTIncreased UV-B radiation, a topic of concern due to climate change, can affect plant development through structural and physiological changes. Common bean (Phaseolus vulgaris L.) is a legume of great economic relevance, being one of the basic components of the human population's diet. Seeds of P. vulgaris var. Carioca were sown and grown in a growth chamber, and at 12 days of age were exposed for 15 min daily to UV-B radiation for a period of 14 days. Growth, leaf anatomy, gas exchange and pigments were evaluated. It was observed that UV-B radiation negatively affected the initial growth of bean plants, which had a reduction in height, number of leaves, fresh and dry leaf masses, leaf area, as well as reduction of stem and root dry masses. There was a reduction in the epidermis thickness, increase in the thickness of the palisade parenchyma and the leaf blade. It was verified yet reduction of the photosynthetic and photoprotectors pigments, reduction of the photosynthetic rate and alterations on the absorbent compounds of the UV-B radiation. The results obtained showed that the increase in UV-B radiation was harmful to the initial development of this crop.Palavras-chave: Agriculture, Anatomy, Beans, Pigments. RESUMOO aumento da radiação UV-B, tema preocupante em virtude das mudanças climáticas, pode afetar o desenvolvimento das plantas, por meio de mudanças estruturais e fisiológicas. O feijoeiro-comum (Phaseolus vulgaris L.) é uma leguminosa de grande relevância econômica, sendo um dos componentes básicos da alimentação humana. Sementes de P. vulgaris var. Carioca foram germinadas e cultivadas em uma câmara de crescimento, sendo aos 12 dias de idade expostas a 15 min diários de radiação UV-B, por um período de 14 dias. Foram avaliados crescimento, anatomia foliar, trocas gasosas e pigmentos. Observou-se que a radiação UV-B afetou negativamente o crescimento inicial do feijoeiro, o qual teve redução em altura, número de folhas, massa fresca, massa seca e área foliares, bem como, redução da massa seca de caule e raiz. Houve redução na espessura da epiderme e aumento nas espessuras do parênquima paliçádico e do limbo. Verificou-se, ainda, redução dos teores de pigmentos fotossintéticos e fotoprotetores, redução da taxa fotossintética e alterações nos compostos absorventes da radiação UV-B. Os resultados obtidos mostraram que o aumento da radiação UV-B foi prejudicial para o desenvolvimento inicial desta cultura.

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Effects of ultraviolet-B radiation on common bean (Phaseolus vulgaris L.) plants grown under nitrogen deficiency

Cited by 13 publications

References 39 publications

Growth, Physiological Attributes and Antioxidant Enzyme Activities in Soybean Seedlings Treated With or Without Silicon Under UV‐B Radiation Stress

Growth, Physiological Attributes and Antioxidant Enzyme Activities in Soybean Seedlings Treated With or Without Silicon Under UV‐B Radiation Stress

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

How does UV-B radiation affect the initial growth of common bean (Phaseolus vulgaris L.)? Physiological and structural aspects

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