Growth and photosynthetic responses of Picea asperata seedlings to enhanced ultraviolet-B and to nitrogen supply

Yao, Xiaogang; Liu, Qing; Han, Chao

doi:10.1590/s1677-04202008000100002

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…In this way, the low photosynthetic efficiency observed in the plants grown with 25% I can be attributed to the close relationship between the photosynthetic capacity of the leaves and the low concentration of N in the leaves (Zhao et al, 2005;Del Pozo et al, 2007;Yao et al, 2008) because lower photosynthetic efficiency is essential for the formation of proteins, not compounds, including the photosynthetic pigments (Maathuis, 2009). The g s decreases with low levels of N, and the reduction in the carbon assimilation rate may be due to the partial closure of the stomata (Monneveux et al, 2006;Alvarez et al, 2011).…”

Section: Discussionmentioning

confidence: 98%

“…The g s decreases with low levels of N, and the reduction in the carbon assimilation rate may be due to the partial closure of the stomata (Monneveux et al, 2006;Alvarez et al, 2011). Therefore, low quantities of N can result in lower A net per unit leaf area (Yao et al, 2008). The concentration of N present in the plant tissue is directly related to A net (Zhao et al, 2005;Matcha, 2007) and to the activity of the enzyme Ribulose bisphosphate carboxylase/oxygenase (Rubisco), which is essential for photosynthesis (Pérez et al, 2005;Andersson and Backlund, 2008;Urban et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

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The Effect of the Ionic Strength of Nutrient Solution on Gas Exchange, Ionic Concentration and Leaf Biomass ofAnnona emarginata(Schltdl.) H. Rainer Variety ‘Terra-Fria’ Seedlings

Báron

Ferreira

Boaro

et al. 2015

Journal of Plant Nutrition

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The present study aimed to test the hypothesis that different levels of the availability of mineral nutrients from Hoagland and Arnon"s (1950) nutrient solution no. 2 affect the photosynthesis, ionic concentration and biomass production in seedlings of Annona emarginata (Schltdl.) H.Rainer variety "terra-fria". Seedlings were grown in a hydroponic setting with 100% ionic strength and with ionic strength reduced to 75%, 50%, and 25%. Ionic strengths intermediate resulted in higher rates of carbon net assimilation and plants grown under these conditions increased biomass as well ionic concentrations of calcium, magnesium and sulphur. The "terraDownloaded by [New York University] at 11:00 11 June 2015 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2fria" plants with nutrient solutions of 50% and 75% ionic strength exhibited higher ionic concentrations, instantaneous carboxylation efficiency and biomass production. It can be concluded that the "terra-fria" does not require the maximum mineral nutrients availability from Hoagland and Arnon"s (1950) to achieve high primary productivity and intermediate ionic strengths can even reduce the time required for rootstock formation.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

The Effect of the Ionic Strength of Nutrient Solution on Gas Exchange, Ionic Concentration and Leaf Biomass ofAnnona emarginata(Schltdl.) H. Rainer Variety ‘Terra-Fria’ Seedlings

Báron

Ferreira

Boaro

et al. 2015

Journal of Plant Nutrition

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“…The differences in leaf accumulation of N and P among the treatments and species may be reflected by the differences in up take dynamics of N and P resulting from the greater insolubility of phosphate compounds and their adsorption on to soil particles ( (Benner and Bazzaz, 1988). Maximum photosynthetic capacity is strongly regulated by leaf nitrogen concentration (Yao et al, 2008). Phosphorus is also an important element that is also required for photosynthetic energy production and carbohydrate transport (De Groot et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Growth and nutrient uptake among three wetland plant species occurring in Lake Victoria basin in Kenya

Musyimi¹,

Netondo²,

Owuor³

et al. 2010

ABJNA

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Nutrient enrichment is one of the most serious threats to wetland ecosystems. Information is lacking, particularly concerning the response of wetland plants species in Kenya in regard to nutrient enrichment of wetlands. Understanding the mechanisms and adaptations that allow only certain species to thrive in the potentially stressful wetland environment requires the study of the biology of these plants. This study was carried out to investigate the growth and nutrient uptake among some selected wetland plant species in Lake Victoria basin, Kenya. Seedlings of Cyperas esculentus L., Aframomum angustifolium (Sonn.) and Phragmites australis (Cav.) Trin. Ex Steudel) were grown outdoors in pots. The pots were arranged in a completely randomised design under out-door conditions in the Botanic garden at Maseno University. Plants were provided with four nutrient dosage levels of 0 mg [no fertiliser added], 50 mg, 100 mg, 150 mg fertilizer [N: P: K, 10:26:10] per pot and replicated five times. The plants were irrigated daily with tap water for eight weeks. Data on growth which included shoot height, stem diameter, leaf number per plant, leaf area, leaf width, leaf length, shoot and root weights were determined. Leaf N and P was also determined. The data were analysed by analysis of variance (ANOVA) in SAS statistical package. Nutrient availability treatments significantly (P ≤ 0.05) influenced the growth and biochemical parameters investigated. Cyperas esculentus and A. angustifolium had higher rate of biomass accumulation as evidenced by increase in shoot and root weights compared to P. australis. Root-shoot ratios reduced with increasing nutrient concentration in C. esculentus and A. angustifolium, while that of P. australis increased up to 100mg treatment, then slightly reduced at 150mg treatment. Phragmites australis had significantly higher foliar P and N content than the other two species with increasing nutrient availability. There were significant interactions between nutrient treatments and species in most of the parameters measured. We recommend Phragmites australis as a better agroforestry plant species for reclaiming wetland areas.

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Photosynthesis performance in sweet almond [Prunus dulcis (Mill) D. Webb] exposed to supplemental UV-B radiation

Ranjbarfordoei¹,

Samson²,

Damme³

2011

Photosynt.

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Due to anthropogenic influences, solar UV-B irradiance at the earth's surface is increasing. To determine the effects of enhanced UV-B radiation on photosynthetic characteristics of Prunus dulcis, two-year-old seedlings of the species were submitted to four levels of UV-B stress, namely 0 (UV-B c ), 4.42 (UV-B 1 ), 7.32 (UV-B 2 ) and 9.36 (UV-B 3 ) kJ m -2 d -1 . Effects of UV-B stress on a range of chlorophyll (Chl) fluorescence parameters (FPs), Chl contents and photosynthetic gas-exchange parameters were investigated. UV-B stress promoted an increase in minimal fluorescence of dark-adapted state (F 0 ) and F 0 /F m , and a decrease in variable fluorescence (F v , F v /F m , F v /F 0 and F 0 /F m ) due to its adverse effects on photosystem II activity. No significant change was observed for maximal fluorescence of dark-adapted state (F m ). Enhanced UV-B radiation caused a significant inhibition of net photosynthetic rate (P N ) at UV-B 2 and UV-B 3 levels and this was accompanied by a reduction in stomatal conductance (g s ) and transpiration rate (E). The contents of Chl a, b, and total Chl content (a+b) were also significantly reduced at increased UV-B stress. In general, adverse UV-B effects became significant at the highest tested radiation dose 9.36 kJ m -2 d -1 . The most sensitive indicators for UV-B stress were F v /F 0 , Chl a content and P N . Significant P<0.05 alteration in these parameters was found indicating the drastic effect of UV-B radiation on P. dulcis.

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Growth and photosynthetic responses of Picea asperata seedlings to enhanced ultraviolet-B and to nitrogen supply

Cited by 6 publications

References 28 publications

The Effect of the Ionic Strength of Nutrient Solution on Gas Exchange, Ionic Concentration and Leaf Biomass ofAnnona emarginata(Schltdl.) H. Rainer Variety ‘Terra-Fria’ Seedlings

The Effect of the Ionic Strength of Nutrient Solution on Gas Exchange, Ionic Concentration and Leaf Biomass ofAnnona emarginata(Schltdl.) H. Rainer Variety ‘Terra-Fria’ Seedlings

Growth and nutrient uptake among three wetland plant species occurring in Lake Victoria basin in Kenya

Photosynthesis performance in sweet almond [Prunus dulcis (Mill) D. Webb] exposed to supplemental UV-B radiation

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