The Use of UV Radiation to Control the Architecture of <i>Salvia splendens</i> Plants. II. Relationships between PAR Levels and UV Radiation in the Photoregulation of Stem Elongation

Bertram, L.; Lercari, Bartolomeo

doi:10.1111/j.1751-1097.1996.tb02432.x

Cited by 8 publications

(3 citation statements)

References 32 publications

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“…Indeed, several authors demonstrated that UV-C provokes reduction of carbohydrate content by inactivation of the Rubisco activity in Calvin cycle (Rahimzadeh et al 2011 ). Biometrical measurements, done 4 weeks after the UV-C exposure, point out that a decrease of inter-knot distance occurs in treated plants, in accordance with Bertram and Lercari ( 1996 ) and Lercari et al ( 2003 ). The same trend is recorded for plants height and stem diameter.…”

Section: Uv-csupporting

confidence: 84%

Growth Patterns of Tomato Plants Subjected to Two Non-conventional Abiotic Stresses: UV-C Irradiations and Electric Fields

Sofo

Castronuovo

Lovelli

et al. 2013

Physiological Mechanisms and Adaptation Strategies in Plants Under Changing Environment

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Capabilities for environmental stress perception, signaling, and response of plant species against a broad range of abiotic stressors have a great range of variability.Ultraviolet (UV) radiation is a component of the solar light and it represents something like 8-9 % of the radiation that naturally reaches the Earth (Frederick 1993 ). Depending on its wavelength, UV can be divided into three different ranges: UV-A (315-390 nm), UV-B (280-315 nm), and UV-C (100-280 nm). Among them, UV-A represents approximately 6.3 % of the incoming solar radiation and is the least hazardous part of UV radiation; UV-B, even if represents just 1.5 % of the total spectrum, is of particular interest because it can cause a multiplicity of detrimental effects in plants (Hollósy 2002 ; Jansen and Bornman 2012 ). Between UV radiations, UV-C is the one with the lower wavelength, or rather with the higher associated energy (Katerova et al. 2009 ;Nawkar et al. 2013 ), and it is well known that UV-C has an acute germicidal action on microorganisms in water, on surfaces, and in air (Siddiqui et al. 2011 ). Indeed, it can induce oxidative results and genetic mutations in plants that in turn have strong negative effects on plant morphology, fl owering, pollination, transpiration, and photosynthesis (Murali and Saxe 1984 ;Booij-James et al. 2000 ).The stratospheric ozone layer effi ciently fi lters out most of the detrimental UV radiation shorter than 280 nm but it decreases rapidly at wavelength longer of 280 nm reaching zero at about 330 nm (Hollósy 2002 ;Nawkar et al. 2013 ). Therefore, UV-B is not completely shielded by the ozone layer and the UV-A are virtually unaffected by the ozone layer. Fortunately, UV-C is strongly affected by the ozone layer in the stratosphere, so that the amount of this radiation reaching the Earth's surface, except for high mountains, is extremely low (Häder et al. 2007 ).

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Section: Uv-csupporting

confidence: 84%

Growth Patterns of Tomato Plants Subjected to Two Non-conventional Abiotic Stresses: UV-C Irradiations and Electric Fields

Sofo

Castronuovo

Lovelli

et al. 2013

Physiological Mechanisms and Adaptation Strategies in Plants Under Changing Environment

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“…Consequently, UV‐B radiation is probably more important than PAR for flavonoid concentration in baby spinach leaves. The quality of PAR is also known to influence the effect of UV‐B radiation on various plant characteristics25–27 and may possibly influence flavonoid concentration as well.…”

Section: Discussionmentioning

confidence: 99%

Effects of shade nettings, sowing time and storage on baby spinach flavonoids

et al. 2007

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Flavonoids are important in plant interactions with the environment and may have positive effects on human health. Effects of light quality and quantity on flavonoid concentration were studied in baby spinach (Spinacia oleracea L.) cultivated under three types of shade netting differing in transmittance of UV-B and PAR, at two times during the season. Leaves harvested at two growth stages for each sowing were subjected to different post-harvest storage conditions. Shade nettings had a relatively small effect on flavonoid concentration in baby spinach. The largest effect was found when radiation was most intense. The nettings then decreased total flavonoid concentration by 15-24% at the normal commercial growth stage at harvest. Radiation and plant growth both affected flavonoid concentration, in opposite or similar directions depending on time of season. This variation was reflected in the statistical analysis, showing significant interactions among the factors. There were large differences (up to 100%) in flavonoid concentration between the different times of the season, in shaded as well as unshaded spinach. Flavonoid concentration and composition changed during storage, but no consistent difference was found between the shaded and unshaded leaves. In most cases, total flavonoid concentration increased significantly during the first 6 days of storage. In conclusion, the use of shade netting is acceptable for production of baby spinach as regards flavonoid concentration and composition.

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“…The role of photosynthetically active radiation (400–700 nm) (PAR) in modifying plant sensitivity and photomorphogenic responses to UV‐B radiation has been examined by a number of investigators (27–31), but few studies have been conducted on ultraviolet‐A (320–400 nm) (UV‐A), UV‐B and PAR interactions (32–34). To ameliorate the effects of elevated UV‐B radiation, it is…”

Section: Introductionmentioning

confidence: 99%

Influence of PAR and UV‐A in Determining Plant Sensitivity and Photomorphogenic Responses to UV‐B Radiation ^¶^†

Krizek

2004

Photochem & Photobiology

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The role of photosynthetically active radiation (400-700 nm) (PAR) in modifying plant sensitivity and photomorphogenic responses to ultravioletl (280-320 nm) (UV-B) radiation has been examined by a number of investigators, but few studies have been conducted on ultraviolet-A (320-400 nm) (UV-A), UV-B and PAR interactions. High ratios of PAR-UV-B and UV-A-UV-B have been found to be important in ameliorating

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The Use of UV Radiation to Control the Architecture of Salvia splendens Plants. II. Relationships between PAR Levels and UV Radiation in the Photoregulation of Stem Elongation

Cited by 8 publications

References 32 publications

Growth Patterns of Tomato Plants Subjected to Two Non-conventional Abiotic Stresses: UV-C Irradiations and Electric Fields

Growth Patterns of Tomato Plants Subjected to Two Non-conventional Abiotic Stresses: UV-C Irradiations and Electric Fields

Effects of shade nettings, sowing time and storage on baby spinach flavonoids

Influence of PAR and UV‐A in Determining Plant Sensitivity and Photomorphogenic Responses to UV‐B Radiation ^¶^†

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The Use of UV Radiation to Control the Architecture of Salvia splendens Plants. II. Relationships between PAR Levels and UV Radiation in the Photoregulation of Stem Elongation

Cited by 8 publications

References 32 publications

Growth Patterns of Tomato Plants Subjected to Two Non-conventional Abiotic Stresses: UV-C Irradiations and Electric Fields

Growth Patterns of Tomato Plants Subjected to Two Non-conventional Abiotic Stresses: UV-C Irradiations and Electric Fields

Effects of shade nettings, sowing time and storage on baby spinach flavonoids

Influence of PAR and UV‐A in Determining Plant Sensitivity and Photomorphogenic Responses to UV‐B Radiation ¶†

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Influence of PAR and UV‐A in Determining Plant Sensitivity and Photomorphogenic Responses to UV‐B Radiation ^¶^†