1
|
Del Valle JC, Buide ML, Whittall JB, Valladares F, Narbona E. UV radiation increases phenolic compound protection but decreases reproduction in Silene littorea. PLoS One 2020; 15:e0231611. [PMID: 32555603 PMCID: PMC7302690 DOI: 10.1371/journal.pone.0231611] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 06/03/2020] [Indexed: 02/06/2023] Open
Abstract
Plants respond to changes in ultraviolet (UV) radiation both morphologically and physiologically. Among the variety of plant UV-responses, the synthesis of UV-absorbing flavonoids constitutes an effective non-enzymatic mechanism to mitigate photoinhibitory and photooxidative damage caused by UV stress, either reducing the penetration of incident UV radiation or acting as quenchers of reactive oxygen species (ROS). In this study, we designed a UV-exclusion experiment to investigate the effects of UV radiation in Silene littorea. We spectrophotometrically quantified concentrations of both anthocyanins and UV-absorbing phenolic compounds in petals, calyces, leaves and stems. Furthermore, we analyzed the UV effect on the photosynthetic activity in hours of maximum solar radiation and we tested the impact of UV radiation on male and female reproductive performance. We found that anthocyanin concentrations showed a significant decrease of about 20% with UV-exclusion in petals and stems, and a 30% decrease in calyces. The concentrations of UV-absorbing compounds under UV-exclusion decreased by approximately 25% in calyces and stems, and 12% in leaves. Photochemical efficiency of plants grown under UV decreased at maximum light stress, reaching an inhibition of 58% of photosynthetic activity, but their ability to recover after light-stress was not affected. In addition, exposure to UV radiation did not affect ovule production or seed set per flower, but decreased pollen production and total seed production per plant by 31% and 69%, respectively. Our results demonstrate that UV exposure produced opposing effects on the accumulation of plant phenolic compounds and reproduction. UV radiation increased the concentration of phenolic compounds, suggesting a photoprotective role of plant phenolics against UV light, yet overall reproduction was compromised.
Collapse
Affiliation(s)
- José Carlos Del Valle
- Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Seville, Spain
| | - Mª Luisa Buide
- Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Seville, Spain
| | - Justen B. Whittall
- Department of Biology, Santa Clara University, Santa Clara, California, United States of America
| | - Fernando Valladares
- Instituto de Recursos Naturales, Centro de Ciencias Medioambientales, CSIC, Madrid, Spain
| | - Eduardo Narbona
- Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Seville, Spain
| |
Collapse
|
2
|
Gao Y, Wang C, Song B, Du F. Corolla retention after pollination facilitates the development of fertilized ovules in Fritillaria delavayi (Liliaceae). Sci Rep 2019; 9:729. [PMID: 30679717 PMCID: PMC6345895 DOI: 10.1038/s41598-018-37358-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 11/30/2018] [Indexed: 11/30/2022] Open
Abstract
Corollas (or perianths), considered to contribute to pollinator attraction during anthesis, persist after anthesis in many plants. However, their post-floral function has been little investigated within a cost-benefit framework. We explored the adaptive significance of corolla retention after anthesis for reproduction in Fritillaria delavayi, a perennial herb endemic to the alpine areas of the Hengduan Mountains, southwestern China. We examined whether the persistent corollas enhance reproductive success during seed development. Persistent corollas increased fruit temperature on sunny days, and greatly decreased the intensity of ultraviolet-B/C (UV-B/C) radiation reaching fruits. When corollas were removed immediately after pollination, fecundity and progeny quality were adversely affected. Measurements of flower mass and size showed no further corolla growth during fruiting, and respiration and transpiration tests demonstrated that both respiration rate and transpiration rate of corollas were much lower during fruiting than during flowering, indicating a slight additional resource investment in corolla retention after anthesis. Thus, seed production by F. delavayi may be facilitated by corolla retention during seed development at only a small physiological cost. We conclude that corolla retention may be an adaptive strategy that enhances female reproductive success by having a protective role for ripening seeds in the harsh conditions at high elevation.
Collapse
Affiliation(s)
- Yongqian Gao
- College of Biodiversity Conservation and Utilization, Southwest Forestry University, 300 Bailong Road, Kunming, 650224, Yunnan, P. R. China.,Yunnan Forestry Technological College, 1 Jindian, Kunming, 650224, Yunnan, P. R. China
| | - Changming Wang
- Faculty of Forestry, Southwest Forestry University, 300 Bailong Road, Kunming, 650224, Yunnan, P. R. China
| | - Bo Song
- Key Laboratory for Plant Diversity and Biogeography of East Asian, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, Yunnan, P. R. China.
| | - Fan Du
- Faculty of Forestry, Southwest Forestry University, 300 Bailong Road, Kunming, 650224, Yunnan, P. R. China.
| |
Collapse
|
3
|
Sugioka N, Kawakami M, Hirai N, Osakabe M. A Pollen Diet Confers Ultraviolet-B Resistance in Phytoseiid Mites by Providing Antioxidants. Front Ecol Evol 2018. [DOI: 10.3389/fevo.2018.00133] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
4
|
Wingfield JL, Ruane LG, Patterson JD. A three-dimensional spatial mapping approach to quantify fine-scale heterogeneity among leaves within canopies. APPLICATIONS IN PLANT SCIENCES 2017; 5:apps.1700056. [PMID: 29188145 PMCID: PMC5703180 DOI: 10.3732/apps.1700056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 09/30/2017] [Indexed: 06/07/2023]
Abstract
PREMISE OF THE STUDY The three-dimensional structure of tree canopies creates environmental heterogeneity, which can differentially influence the chemistry, morphology, physiology, and/or phenology of leaves. Previous studies that subdivide canopy leaves into broad categories (i.e., "upper/lower") fail to capture the differences in microenvironments experienced by leaves throughout the three-dimensional space of a canopy. METHODS We use a three-dimensional spatial mapping approach based on spherical polar coordinates to examine the fine-scale spatial distributions of photosynthetically active radiation (PAR) and the concentration of ultraviolet (UV)-absorbing compounds (A300) among leaves within the canopies of black mangroves (Avicennia germinans). RESULTS Linear regressions revealed that interior leaves received less PAR and produced fewer UV-absorbing compounds than leaves on the exterior of the canopy. By allocating more UV-absorbing compounds to the leaves on the exterior of the canopy, black mangroves may be maximizing UV-protection while minimizing biosynthesis of UV-absorbing compounds. DISCUSSION Three-dimensional spatial mapping provides an inexpensive and portable method to detect fine-scale differences in environmental and biological traits within canopies. We used it to understand the relationship between PAR and A300, but the same approach can also be used to identify traits associated with the spatial distribution of herbivores, pollinators, and pathogens.
Collapse
Affiliation(s)
- Jenna L. Wingfield
- Department of Molecular Biology and Chemistry, Christopher Newport University, Newport News, Virginia 23606 USA
| | - Lauren G. Ruane
- Department of Organismal and Environmental Biology, Christopher Newport University, Newport News, Virginia 23606 USA
| | - Joshua D. Patterson
- Department of Molecular Biology and Chemistry, Christopher Newport University, Newport News, Virginia 23606 USA
| |
Collapse
|
5
|
Suchar VA, Robberecht R. Integration and scaling of UV-B radiation effects on plants: from DNA to leaf. Ecol Evol 2015; 5:2544-55. [PMID: 26257869 PMCID: PMC4523352 DOI: 10.1002/ece3.1332] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 10/16/2014] [Accepted: 11/07/2014] [Indexed: 01/17/2023] Open
Abstract
A process-based model integrating the effects of UV-B radiation through epidermis, cellular DNA, and its consequences to the leaf expansion was developed from key parameters in the published literature. Enhanced UV-B radiation-induced DNA damage significantly delayed cell division, resulting in significant reductions in leaf growth and development. Ambient UV-B radiation-induced DNA damage significantly reduced the leaf growth of species with high relative epidermal absorbance at longer wavelengths and average/low pyrimidine cyclobutane dimers (CPD) photorepair rates. Leaf expansion was highly dependent on the number of CPD present in the DNA, as a result of UV-B radiation dose, quantitative and qualitative absorptive properties of epidermal pigments, and repair mechanisms. Formation of pyrimidine-pyrimidone (6-4) photoproducts (6-4PP) has no effect on the leaf expansion. Repair mechanisms could not solely prevent the UV-B radiation interference with the cell division. Avoidance or effective shielding by increased or modified qualitative epidermal absorptance was required. Sustained increased UV-B radiation levels are more detrimental than short, high doses of UV-B radiation. The combination of low temperature and increased UV-B radiation was more significant in the level of UV-B radiation-induced damage than UV-B radiation alone. Slow-growing leaves were more affected by increased UV-B radiation than fast-growing leaves.
Collapse
Affiliation(s)
- Vasile Alexandru Suchar
- Department of Forest, Rangeland, and Fire Sciences, College of Natural Resources, University of Idaho875 Perimeter Drive MS1133, Moscow, Idaho, 83844-1133
| | - Ronald Robberecht
- Department of Forest, Rangeland, and Fire Sciences, College of Natural Resources, University of Idaho875 Perimeter Drive MS1133, Moscow, Idaho, 83844-1133
| |
Collapse
|
6
|
Huttunen S, Lappalainen NM, Turunen J. UV-absorbing compounds in subarctic herbarium bryophytes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2005; 133:303-314. [PMID: 15519461 DOI: 10.1016/j.envpol.2004.05.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2004] [Accepted: 05/31/2004] [Indexed: 05/24/2023]
Abstract
The UV-B-absorbing compounds of herbarium specimens of 10 subarctic bryophyte species collected during the years 1926-1996 and available at the Botanical Museum, University of Oulu, were studied. We studied whether herbarium specimens reflect changes in the past radiation climate through their methanol-extractable compounds. The order of gametophytes based on the average amount of total compounds (sum of A280-320 nm) per mass from the lowest to the highest was Polytrichum commune, Pleurozium schreberi, Hylocomium splendens, Sphagnum angustifolium, Dicranum scoparium, Funaria hygrometrica, Sphagnum fuscum, Sphagnum warnstorfii, Sphagnum capillifolium and Polytrichastrum alpinum, and the amount of UV-B-absorbing compounds per specific surface area correlated with the summertime daily global radiation and latitude. P. alpinum, F. hygrometrica and three Sphagnum species seem to be good indicators for further studies. The amount of UV-B-absorbing compounds revealed no significant trends from the 1920s till the 1990s, with the exception of S. capillifolium, which showed a significant decreasing trend.
Collapse
Affiliation(s)
- S Huttunen
- Botany Division, Department of Biology, P.O. Box 3000, FIN-90 014 University of Oulu, Finland.
| | | | | |
Collapse
|
7
|
Olivares E. The effect of lead on the phytochemistry of Tithonia diversifolia exposed to roadside automotive pollution or grown in pots of Pb-supplemented soil. ACTA ACUST UNITED AC 2003. [DOI: 10.1590/s1677-04202003000300004] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Tithonia diversifolia, a ruderal weedy species utilized in agroforestry, is widely distributed in the tropics, often being found in wasteland, margins of polluted city rivers and roadsides. The objective of this study was to compare plants sampled at a light and heavy traffic roadside for metal concentration and foliar compounds which may be related to senescence and/or detoxification of metals. The field survey was followed by an experiment in pots of Pb-acetate-supplemented soil to verify if the same response is obtained under controlled conditions with regard to Pb. The concentration of Pb in leaves and roots of plants sampled at a heavy traffic roadside was higher than in samples from a light traffic site. The content of Cr, Al, Fe, Cu and Ni was also higher in leaves but not of roots in plants from the pollutedsite. No significant differences were found in the concentrations of chlorophyll, carotenoids, UV-absorbing compounds and proteins, nor in the chlorophyll a/b ratio and lipid peroxidation of leaves collected at both sites. On the other hand, Pb-contaminated leaves and roots showed higher acid phosphatase activity while the foliar nitrate reductase activity and specific leaf mass were lower. An increase of leaf phenol concentration, thought to be involved in the detoxification of metals, was observed in the polluted field plants and in roots in the pot experiment, where Pb-acetatewas supplied to the soil, but the changes observed in acid phosphatase and specific leaf mass in the field were not found in the pot experiment.
Collapse
|
8
|
Gaberscik A, Voncina M, Trost T, Germ M, Olof Björn L. Growth and production of buckwheat (Fagopyrum esculentum) treated with reduced, ambient, and enhanced UV-B radiation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2002; 66:30-6. [PMID: 11849980 DOI: 10.1016/s1011-1344(01)00272-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The effect of enhanced UV-B radiation on buckwheat (Fagopyrum esculentum Moench. variety 'Darja'), an important high elevation crop, was studied in order to estimate its vulnerability in changing UV-B environment. Plants were grown in outdoor experiments from July to October under reduced and ambient UV-B levels, and an UV-B level simulating 17% ozone depletion in Ljubljana. During the development the following parameters were monitored: light saturated photosynthetic activity, transpiration, potential and effective photochemical efficiencies of photosystem II, the contents of photosynthetic pigments and methanol soluble UV-B absorbing compounds. At the end of the experiment, growth rate and production of seeds were estimated. In the following growth season the seeds collected from plants exposed to different UV-B treatments were tested for germination capacity. Total UV-B absorbing compounds during plant development were increased by UV-B radiation, photosynthetic pigments (chlorophyll a and b and carotenoids) decreased. Photosynthetic rate was lowered in an early stage of development. UV-B treatment resulted in the increase in the transpiration rate and consequently the decrease in water use efficiency (WUE). The disturbances in water economy and in photosynthesis affected the reproduction potential negatively; the production of seeds in plants cultivated under ambient and enhanced UV-B was 57 and 39% of the production of specimens treated with reduced UV-B, respectively. The germination of seeds collected from treated plants revealed on average about 95% success, independently of the treatment, but the time needed for germination was the shortest for seeds developed under enhanced UV-B level treatment. Enhanced UV-B radiation affected water relations and production of buckwheat, but not the potential of seeds for germination.
Collapse
Affiliation(s)
- Alenka Gaberscik
- National Institute of Biology, Vecna pot 111, Ljubljana, Slovenia.
| | | | | | | | | |
Collapse
|
9
|
Germ M, Mazej Z, Gaberscik A, Häder DP. The influence of enhanced UV-B radiation on Batrachium trichophyllum and Potamogeton alpinus -- aquatic macrophytes with amphibious character. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2002; 66:37-46. [PMID: 11849981 DOI: 10.1016/s1011-1344(01)00273-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The responses of two amphibious species, Batrachium trichophyllum and Potamogeton alpinus to different UV-B environments were studied. Plant material from natural environments, as well as from outdoor treatments was examined. In long-term outdoor experiments plants were grown under three different levels of UV-B radiation: reduced and ambient UV-B levels, and a UV-B level simulating 17% ozone depletion. The following parameters were monitored: contents of total methanol soluble UV-absorbing compounds and chlorophyll a, terminal electron transport system (ETS) activity and optimal and effective quantum yield of photosystem II. No effect of the different UV-B levels on the measured parameters was observed. The amount of UV-B absorbing compounds seems to be saturated, since no differences were observed between treatments and no increase was found in peak season, when natural UV-B levels were the highest. Physiological measurements revealed no harmful effects; neither on potential and actual photochemical efficiency, nor on terminal ETS activity. The contents of UV-B absorbing compounds were examined also in plant material sampled in low and high altitude environments during the growth season. Both species exhibited no seasonal dynamics of production of UV-absorbing compounds. The contents were variable and showed no significant differences between high and low altitude populations.
Collapse
Affiliation(s)
- Mateja Germ
- National Institute of Biology, Vecna pot 111, Ljubljana, Slovenia.
| | | | | | | |
Collapse
|
10
|
Effects of Ultraviolet-B Radiation on Terrestrial Organisms and Ecosystems with Special Reference to the Arctic. ACTA ACUST UNITED AC 2002. [DOI: 10.1007/978-3-642-56075-0_5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
11
|
Petropoulou Y, Georgiou O, Psaras GK, Manetas Y. Improved flower advertisement, pollinator rewards and seed yield by enhanced UV-B radiation in the Mediterranean annual Malcolmia maritima. THE NEW PHYTOLOGIST 2001; 152:85-90. [PMID: 35974483 DOI: 10.1046/j.0028-646x.2001.00241.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
• The effects of enhanced UV-B radiation on reproductive and pollination success were investigated in the Mediterranean annual Malcolmia maritima. • Plants were exposed in the field to ambient or ambient plus supplemental UV-B radiation (biologically equivalent to a 15% ozone depletion over Patras, Greece, 38°14' N, 21°44' E) up to leaf senescence and fruit maturation. • UV-B radiation had no effect on stem and fruit biomass, anthesis time and duration and flower number. However, flower diameter, nectary volume and nectar amount per flower (but not nectar concentration) were significantly increased by supplemental UV-B radiation. In addition UV-B treated plants showed higher reproductive success (i.e. lower abortion rates and higher fruit to flower ratio) and a trend to higher pollination success (i.e. increased number of seeds per fruit). As a result, the seed yield was increased. Seed mass, seed germination and early seedling growth were not affected by UV-B treatment of mother plants. • It is suggested that the UV-B induced changes in flower attributes might have affected pollinators' behaviour in a way that improved the fitness of M. maritima.
Collapse
Affiliation(s)
- Y Petropoulou
- Section of Plant Biology, Department of Biology, University of Patras, GR-265 00 Patras, Greece
| | - O Georgiou
- Section of Plant Biology, Department of Biology, University of Patras, GR-265 00 Patras, Greece
| | - G K Psaras
- Section of Plant Biology, Department of Biology, University of Patras, GR-265 00 Patras, Greece
| | - Y Manetas
- Section of Plant Biology, Department of Biology, University of Patras, GR-265 00 Patras, Greece
| |
Collapse
|
12
|
Day TA, Ruhland CT, Xiong FS. Influence of solar ultraviolet-B radiation on Antarctic terrestrial plants: results from a 4-year field study. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2001; 62:78-87. [PMID: 11693369 DOI: 10.1016/s1011-1344(01)00161-0] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We examined the influence of solar ultraviolet-B radiation (UV-B; 280-315 nm) on the performance of Antarctic vascular plants (Colobanthus quitensis and Deschampsia antarctica) by placing filters that either absorbed or transmitted most solar UV-B over tundra along the Antarctic Peninsula for four consecutive growing seasons. The difference in biologically effective UV-B levels between our treatments was 65%, which was similar to the enhancement in ambient UV-B levels that appeared attributable to ozone depletion during the first 2 months of the growing season (November and December) at our site (62%). In both species, exposure to UV-B reduced vegetative growth, primarily through slower leaf elongation rates that led to shorter fully expanded leaves. In C. quitensis, exposure to UV-B also led to reductions in leaf longevity, branch production, cushion diameter growth, aboveground biomass, and thickness of the non-green cushion base and litter layer. Exposure to UV-B accelerated the development of reproductive structures and increased the number of panicles (D. antarctica) and capsules (C. quitensis) that reached maturity per unit of ground surface area covered by mother plants. However, this effect was offset by a tendency for these panicles and capsules to produce fewer spikelets and seeds. Ultimately, UV-B exposure did not effect the numbers of spikelets or seeds produced per unit of ground surface area. While seeds from plants exposed to UV-B tended to be lighter, germination rates were similar between UV-B treatments. The relative reductions in leaf elongation rates in D. antarctica attributable to UV-B exposure increased from the first (23%) through the fourth (43%) growing season, and relative reductions in leaf longevity in C. quitensis tended to increase from the first (9%) through the fourth (19%) growing season, suggesting that UV-B growth responses tended to be cumulative over successive years.
Collapse
Affiliation(s)
- T A Day
- Department of Plant Biology, Arizona State University, Tempe 85287-1601, USA.
| | | | | |
Collapse
|
13
|
Rozema J, Broekman RA, Blokker P, Meijkamp BB, de Bakker N, van de Staaij J, van Beem A, Ariese F, Kars SM. UV-B absorbance and UV-B absorbing compounds (para-coumaric acid) in pollen and sporopollenin: the perspective to track historic UV-B levels. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2001; 62:108-17. [PMID: 11693361 DOI: 10.1016/s1011-1344(01)00155-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
UV-B absorbance and UV-B absorbing compounds (UACs) of the pollen of Vicia faba, Betula pendula, Helleborus foetidus and Pinus sylvestris were studied. Sequential extraction demonstrated considerable UV-B absorbance both in the soluble (acid methanol) and insoluble sporopollenin (acetolysis resistant residue) fractions of UACs, while the wall-bound fraction of UACs was small. The UV-B absorbance of the soluble and sporopollenin fraction of pollen of Vicia faba plants exposed to enhanced UV-B (10 kJ m(-2) day(-1) UV-B(BE)) was higher than that of plants that received 0 kJ m(-2) day(-1) UV-B(BB). Pyrolysis gas chromatography-mass spectrometry (py-GC-MS) analysis of pollen demonstrated that p-coumaric acid and ferulic acid formed part of the sporopollenin fraction of the pollen. The amount of these aromatic monomers in the sporopollenin of Vicia faba appeared to increase in response to enhanced UV-B (10 kJ m(-2) day(-1) UV-B(BE)). The detection limit of pyGC-MS was sufficiently low to quantify these phenolic acids in ten pollen grains of Betula and Pinus. The experimental data presented provide evidence for the possibility that polyphenolic compounds in pollen of plants are indicators of solar UV-B and may be applied as a new proxy for the reconstruction of historic variation in solar UV-B levels.
Collapse
Affiliation(s)
- J Rozema
- Department of Systems Ecology, Vrije Universiteit, Amsterdam, The Netherlands.
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Rozema J, Noordijk AJ, Broekman RA, van Beem A, Meijkamp BM, de Bakker NVJ, van de Staaij JWM, Stroetenga M, Bohncke SJP, Konert M, Kars S, Peat H, Smith RIL, Convey P. (Poly)phenolic compounds in pollen and spores of Antarctic plants as indicators of solar UV-B. RESPONSES OF PLANTS TO UV-B RADIATION 2001:9-26. [PMID: 0 DOI: 10.1007/978-94-017-2892-8_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
|
15
|
Effects of increased solar ultraviolet radiation on terrestrial ecosystems. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 1998. [DOI: 10.1016/s1011-1344(98)00184-5] [Citation(s) in RCA: 363] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|