Effects of Enhanced UV-B Radiation on Germination, Seedling Growth, Leaf Anatomy and Pigments of Some Crop Plants

Tevini, Manfred; Thoma, U.; Iwanzik, W.

doi:10.1016/s0044-328x(83)80127-5

Cited by 62 publications

(19 citation statements)

References 20 publications

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“…The inhibiting effect of UV-B radiation on germination observed, both in the among-species and in the within-species approach of this study, has been previously described for several other species. Tevini et al (1983), for example, confirmed reduced germination under high UV-B levels for three crop species. A similar result was found for Bromus tectorum (Dai and Upadhyaya 2002) and Senecio jacobaea (Tosserams et al 1997).…”

Section: The Role Of Pre-adaptationmentioning

confidence: 64%

“…Musil (1995), for example, described higher UV-B resilience for monocotyledons than for dicotyledons. Evidence of UV-B-induced inhibition of germination has been provided by several studies to date (Tevini et al 1983, Tosserams et al 1997, Dai and Upadhyaya 2002. There is also clear evidence for inter-and intraspecific differences in UV-B sensitivity in plants (Hofmann and Campbell 2011).…”

Section: Introductionmentioning

confidence: 95%

“…In particular, reduced seedling biomass, inhibited hypocotyl or root development and growth abnormalities (e.g. shoot curvature) have been observed in response to high UV-B intensities (Krizek 1975, Tevini et al 1983, Tosserams et al 1997, Dai and Upadhyaya 2002. In addition, species differ in their responsiveness to UV-B radiation.…”

Section: Introductionmentioning

confidence: 99%

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Effects of UV-B radiation on germination characteristics in invasive plants in New Zealand

Hock¹,

Beckmann²,

Hofmann³

et al. 2015

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UV-B radiation represents a potentially selective, yet little studied environmental factor for plant invasions, especially with respect to germination characteristics and seedling establishment in areas of high UV-B exposure such as New Zealand. To explain invasive potential of plant species pre-adaptation and local adaptation to selection factors in the invaded range are two frequently consulted concepts. To test for the relevance of these mechanisms, it is necessary to compare both invasive and non-invasive species, as well as native and exotic origins of invasive species. In the present study, germination success of two congeneric species pairs of the genera Verbascum (Scrophulariaceae) and Echium (Boraginaceae) were investigated under high UV-B intensities. Each genus comprised one species that has successfully invaded New Zealand grasslands and one species that was introduced but has not been invasive in New Zealand. In an among-species approach, pre-adaptation was tested by comparing germination success of native (European) origins of all four species in relation to their different invasive success in New Zealand. In a within-species comparison, native (European) and exotic (New Zealand) origins of the two invasive species were compared to test for local adaptation to UV-B in the invaded range. In both approaches, UV-B radiation inhibited the germination success of all study species. However, the comparison of invasive and non-invasive species of the two genera showed no UV-B-specific pre-adaptation of invasive species to high NeoBiotaMaria Hock et al. / NeoBiota 26: 21-37 (2015) 22 UV-B intensities. Higher germination success of invasive species probably led to an establishment advantage during colonization of the invaded range. Although local adaptation of exotic populations to UV-B could not be demonstrated in the within-species approach, a genetic shift in germination velocity between native and exotic origins was found. These differences may be ascribed to other relevant environmental factors, e.g. overall irradiation and drought, inducing similar plant responses as under UV-B radiation.

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Section: The Role Of Pre-adaptationmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 95%

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Effects of UV-B radiation on germination characteristics in invasive plants in New Zealand

Hock¹,

Beckmann²,

Hofmann³

et al. 2015

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“…Os menores valores de área foliar para as plantas expostas a radiação, também podem ser entendidos como um mecanismo de proteção em função da redução do tamanho ou número de células (Gonzalez et al 1998) ou ajustes na estrutura da folha (Tevini et al 1983). A radiação UV-B exerce efeitos negativos sobre a divisão celular, o que também poderia resultar na menor área foliar .…”

Section: Discussionunclassified

Efeitos da radiação ultravioleta-B sobre a morfologia foliar de Arabidopsis thaliana (L.) Heynh. (Brassicaceae)

Boeger

Poulson

2006

Acta Bot. Bras.

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RESUMO -(Efeitos da radiação ultravioleta-B sobre a morfologia foliar de Arabidopsis thaliana (L.) Heynh. (Brassicaceae)). A redução da camada de ozônio resulta no aumento da radiação ultravioleta que atinge a superfície terrestre, especialmente a radiação ultravioleta-B (UV-B). O aumento da radiação poderá induzir a mudanças estruturais e fisiológicas nas plantas, influenciando no seu crescimento e desenvolvimento. O objetivo deste trabalho foi determinar os efeitos da radiação UV-B ambiente sobre a morfologia das folhas de Arabidopsis thaliana desenvolvidas em condições controladas. As sementes de A. thaliana cresceram em câmaras de crescimento, com 300 µmol m -2 s -1 de radiação fotossinteticamente ativa (PAR) com ou sem 6 kJ m -2 s -1 de radiação UV-B be (UV-B be ; UV-B biologicamente efetiva). Após 21 dias, 10 folhas de cada tratamento (com e sem radiação UV-B) foram coletadas para avaliar área foliar, massa fresca e seca, AEF, densidades estomáticas e de tricomas de ambas as faces da folha, espessura da lâmina foliar e concentração de compostos fenólicos e de clorofila total, a e b. As folhas tratadas com radiação UV-B apresentaram menor área foliar, massa fresca e seca, densidade de tricomas na face adaxial e densidade de estômatos na face abaxial da folha. Entretanto, apresentaram os maiores valores médios de espessura total da lâmina e do mesofilo, maior concentração de clorofila total, clorofila a e clorofila b e compostos fenólicos foliares do que as folhas não tratadas com radiação UV-B. Essas diferenças morfológicas significativas (p < 0,05) entre as folhas tratadas e não tratadas com radiação UV-B indicam que A. thaliana é sensível à radiação e possui mecanismos para minimizar os seus efeitos negativos sobre o desenvolvimento e crescimento foliar. Entretanto, as respostas da planta à radiação UV-B envolvem vários mecanismos fisiológicos que ainda necessitam de investigações mais detalhadas. Palavras-chave : Arabidopsis thaliana, radiação UV-B, morfologia foliar, compostos fenólicos ABSTRACT -(Effects of ultraviolet-B radiation on leaf morphology of Arabidopsis thaliana (L.) Heynh. (Brassicaceae)). Reduction of the ozone layer results in the increase in ultraviolet radiation reaching the earth's surface, especially the ultraviolet-B (UV-B). The increase of radiation may induce structural and physiological changes in plants, influencing their growth and development. This paper evaluates the effects of ambient UV-B radiation upon to the leaf morphology of Arabidopsis thaliana developed under controlled conditions. The seeds of A. thaliana grown in environmental chamber, with 300 µmol m -2 s -1 de photosynthetically active radiation (PAR) with and without 6 kJ m -2 s -1 of radiation UV-B be (UV-B be ; UV-B biologically effective). After 21 days, ten leaves of each treatment (with and without UV-B radiation) were collected to measure leaf area, fresh and dry mass, AEF, stomata and trichome densities of both leaf surfaces, leaf thickness and concentration of phenolic compounds and total chlorophyll, and ...

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“…The UV-B treated radish plants had an increased flavonoid content compared to those under UVA. Tevini et al (1983) reported a high content of flavonoids in seedlings of plants which are relatively resistant (barley and radish) to UV-B radiation. They have also shown that high UV-B absorbing compounds may not offer continued protection at increasingly higher UV-B radiation.…”

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confidence: 99%

Different responses to UV-B enhanced solar radiation in radish and carrot

2005

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Radish (Raphanus sativus L.) and carrot (Daucus carota L.), plants with underground storage organs grown in the field, were exposed to either ambient (UVA) or 20 % UV-B (UVE) enhanced solar radiation till their root yield stage. In radish, UVE produced a significant increase in shoot and root fresh mass (FM), increase in the contents of chlorophyll, carotenoids, flavonoids, and total proteins per unit FM, Hill reaction rate, and root yield. In contrast, carrot responded negatively to UVE showing a loss in the above parameters.

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Effects of Enhanced UV-B Radiation on Germination, Seedling Growth, Leaf Anatomy and Pigments of Some Crop Plants

Cited by 62 publications

References 20 publications

Effects of UV-B radiation on germination characteristics in invasive plants in New Zealand

Effects of UV-B radiation on germination characteristics in invasive plants in New Zealand

Efeitos da radiação ultravioleta-B sobre a morfologia foliar de Arabidopsis thaliana (L.) Heynh. (Brassicaceae)

Different responses to UV-B enhanced solar radiation in radish and carrot

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