Effects of solar ultraviolet-B radiation, temperature and CO2 on growth and physiology of sunflower and maize seedlings

Mark, U.; Tevini, Manfred

doi:10.1007/978-94-011-5718-6_20

Cited by 27 publications

(35 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar results were obtained with Brassica rapa [16] and Silene vulgaris [26]. Researchers using higher doses to treat sunflower and corn, report an increase in leaf thickness [21]. Treatment of eight varieties of beans [27] showed that the differences in the response are not interspecific only, but intraspecific as well.…”

Section: Resultssupporting

confidence: 66%

“…The decrease of net photosynthesis due to enhanced UV-B was detected also in some other agricultural plants, i.e. in soybean and pea [20,23] but not in sunflower, corn and bean [21,22]. It seems that the significant increase of transpired water in young UV-B treated buckwheat plants influenced their further development.…”

Section: Resultsmentioning

confidence: 86%

“…The literature reports on UV-B influences on photosynthetic pigments [18][19][20]. Sunflower and corn showed little effect of UV-B on chlorophyll content [21], as did Brassica rapa [16] and Phaseolus vulgaris [22]. In buckwheat, potential and actual photochemical efficiencies of PS II were not affected by enhanced UV-B radiation (Fig.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Growth and production of buckwheat (Fagopyrum esculentum) treated with reduced, ambient, and enhanced UV-B radiation

Gaberščik

Vončina

Trošt

et al. 2002

Journal of Photochemistry and Photobiology B: Biology

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 86%

See 1 more Smart Citation

Growth and production of buckwheat (Fagopyrum esculentum) treated with reduced, ambient, and enhanced UV-B radiation

Gaberščik

Vončina

Trošt

et al. 2002

Journal of Photochemistry and Photobiology B: Biology

View full text Add to dashboard Cite

show abstract

“…Height differences were more pronounced during the vegetative stage (data not shown), and this agreed with greater sensitivity at the early development stage to UV-B reported by others (Musil and Wand, 1994;Saile-Mark and Tevini, 1997;Correia et al, 1998). Delay of silking may have been due to impact of enhanced UV-B radiation on the biosynthesis of gibberellins (Saile- Mark and Tevini, 1997). The decrease in the NGLBE in UV-B plants indicated an early senescence of older foliage, also observed by other researchers (Teramura and Sullivan, 1987;Naidu et al, 1993).…”

Section: Uv-b Effectssupporting

confidence: 78%

Ultraviolet-B radiation and nitrogen effects on growth and yield of maize under Mediterranean field conditions

Correia

Coutinho

Björn

et al. 2000

European Journal of Agronomy

View full text Add to dashboard Cite

The effects of an increase in UV-B radiation on growth and yield of maize (Zea mays L.) were investigated at four levels of applied nitrogen (0, 100, 200 and 300 kg ha− 1 of N) under Mediterranean field conditions. The experiment simulated a 20% stratospheric ozone depletion over Portugal. Enhanced UV-B and N deficiency decreased yield and total biomass production by 22-49%. High UV-B dose reduced yield, total biomass and growth of N-fertilized maize plants but did not affect N-stressed plants to the same extent. The response of grain yield to N was smaller with enhanced UV-B radiation. The underlying mechanisms for these results are discussed.

show abstract

“…Previous studies have demonstrated several detrimental effects of UV-B on plants, including DNA damage, inhibition of photosynthetic activity and growth (Mark and Tevini, 1997). In order to prevent these harmful effects of UV-B radiation, plant have developed several defense mechanisms, including repair of inflicted damage and screening of the internal tissues against the radiation.…”

Section: Introduction 1)mentioning

confidence: 99%

Effects of Hexaconazole on Growth and Antioxidant Potential of Cucumber Seedlings under UV-B Radiation

Kim¹,

Hong²

2012

Journal of Environmental Science International

View full text Add to dashboard Cite

The present study was conducted to determine the effect of hexaconazole (HEX), a triazole fungicide, on the growth, yield, photosynthetic response and antioxidant potential in cucumber (Cucumis sativus L.) plants subjected to UV-B stress. UV-B radiation and HEX were applied separately or in combination to cucumber seedlings. The growth parameters were significantly reduced under UV-B treatment, however, this growth inhibition was less in HEX treated plants. HEX caused noticeable changes in plant morphology such as reduced shoot length and leaf area, and increased leaf thickness. HEX was quite persistent in inhibiting shoot growth by causing a reduction in shoot fresh and dry weight. HEX noticeably recovered the UV-B induced inhibition of biomass production. Significant accumutation in anthocyanin and flavonoid pigments in the leaves occurred as a result of HEX or UV-B treatments. HEX permitted the survival of more green leaf tissue preventing chlorophyll content reduction and higher quantum yield for photosystemⅡ under UV-B exposure. HEX treatment induced a transient rise in ABA levels in the leaves, and combined application of HEX and UV-B showed a significant enhancement of ABA content which activates H2O2 generation. UV-B exposure induced accumulation of H2O2 in the leaves, while HEX prevented UV-B induced increase in H2O2, indicating that HEX serves as an antioxidant agent able to scavenge H2O to protect cells from oxidative damage. An increase in the ascorbic acid was observed in the HEX treated cucumber leaves affecting many enzyme activities by removing H2O2 during photosynthetic processes. The activities of antioxidant enzymes including catalase(CAT), ascorbate peroxidase(APX), superoxide dismutase(SOD) and peroxidase(POD) in the leaves in the presence of HEX under UV-B stress were higher than those under UV-B stress alone. These findings suggest that HEX may participate in the enhanced tolerance to oxidative stress. From these results it can be concluded that HEX moderately ameliolate the effect of UV-B stress in cucumber by improving the components of antioxidant defense system.

show abstract

Effects of solar ultraviolet-B radiation, temperature and CO2 on growth and physiology of sunflower and maize seedlings

Cited by 27 publications

References 37 publications

Growth and production of buckwheat (Fagopyrum esculentum) treated with reduced, ambient, and enhanced UV-B radiation

Growth and production of buckwheat (Fagopyrum esculentum) treated with reduced, ambient, and enhanced UV-B radiation

Ultraviolet-B radiation and nitrogen effects on growth and yield of maize under Mediterranean field conditions

Effects of Hexaconazole on Growth and Antioxidant Potential of Cucumber Seedlings under UV-B Radiation

Contact Info

Product

Resources

About