EurekaMag
+ Translate
+ Most Popular
Gaucher's disease;thirty-two years experience at Siriraj Hospital
A study of Macrobathra Meyrick from China (Lepidoptera, Cosmopterigidae)
First occurrence in ores of tetragonal chalcocite
Effects of trace element nutrition on sleep patterns in adult women
N.Z. range management guidelines. 2. Design of grazing management systems for tussock country
A case of lipoma of the esophagus
A revision of world Acanthosomatidae (Heteroptera: Pentatomidae): keys to and descriptions of subfamilies, tribes and genera, with designation of types
Life history of the coronate scyphozoan Linuche unguiculata (Swartz, 1788)
Perceptual restoration of obliterated sounds
Mutagenicity studies on two chromium(III) coordination compounds
The formation of the skeleton. I. Growth of a long bone. 1st appearance of a center of calcification
Leucopenia and abnormal liver function in travellers on malaria chemoprophylaxis
The joint commission: four key root causes loom large in sentinel event data
Treatment of vitiligo with topical 15% lactic acid solution in combination with ultra violet-A
Behaviour of dairy cows within three hours after feed supply: I. Influence of housing type and time elapsing after feed supply
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Management and control of patients with type 2 diabetes mellitus in Lebanon: results from the International Diabetes Management Practices Study (IDMPS)
The diet composition and nutritional knowledge of patients with anorexia nervosa
Physoporella croatica Herak, 1958 of the Slovak karst Anisian (Slovakia, the West Carpathians Mts.)
Bright lights, big noise. How effective are vehicle warning systems?
Ein Plesiosaurier-Rest mit Magensteinen aus mittlerem Lias von Quedlinburg
Incidence of Chlamydia trachomatis in patients with sterility
Monster soup: the microscope and Victorian fantasy
Preliminary tests with residual sprays against poultry lice
Duration of the life of plants in phylogeny

UVA radiation promotes tomato growth through morphological adaptation leading to increased light interception


UVA radiation promotes tomato growth through morphological adaptation leading to increased light interception



Environmental and Experimental Botany 176: 104073



ISSN/ISBN: 0098-8472

DOI: 10.1016/j.envexpbot.2020.104073

UVA radiation (315 - 400 nm) is the main component of solar UV radiation. Although it shares photoreceptors (i.e. cryptochromes and phototropins) with blue light (400-500 nm), its function in plant biology is unclear to a large extent. This study aimed at exploring how UVA radiation affects plant morphology and physiology, and at distinguishing to what extent these effects differ from those of blue light. Tomato plants were grown under monochromatic red (R), dichromatic red and blue (R/B = 7:1), as well as red and two different levels of UVA radiation (R/UVA = 7:1 and 15:1, respectively), with identical photon flux density (250 mu mol.m(-2).s(-1)). Peak intensities of UVA, B and R were 370, 450 and 660 nm, respectively. We showed that replacing blue by UVA (in a background of red light) induced plant morphological modifications, as reflected by larger leaf area, steeper leaf angles, flatter leaves and longer stems. UVA had reduced effects on leaf secondary metabolism compared to blue light, resulting in significantly lower total phenolics and flavonoid contents, as well as concentrations of UV-absorbing compounds. In addition, UVA had a similar function as blue light in shaping the development of the photosynthetic apparatus, as both wavebands alleviated the 'red light syndrome' (i.e. low photosynthetic capacity, reduced photosynthetic electron transport, and unresponsive stomata). We conclude that: 1) UVA promotes tomato growth through morphological adaptation leading to increased light interception; 2) UVA affects leaf secondary metabolite accumulation less strongly than blue light; 3) UVA functions similarly to blue light in maintaining leaf photosynthetic functioning. Thus, unlike previously suggested, UVA cannot be unequivocally considered as an abiotic stress factor. This research adds to the understanding of plant processes in response to UVA radiation and provides a basis for future recipes for growing plants with artificial light.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 071018702

Download citation: RISBibTeXText

Related references

Radiation use efficiency, above ground biomass accumulation, canopy development, leaf area-light interception profiles and radiation interception of sunflower (Helianthus annuus L.) as influenced by irrigation regimen. Helia 24(35): 101-109, 2001

Growth of lettuce, onion, and red beet. 1. Growth analysis, light interception, and radiation use efficiency. Annals of Botany 78(5): 633-643, 1996

Effect of N availability on growth, N uptake, light interception and photosynthetic activity in processing tomato. Acta Horticulturae (571): 209-216, 2002

Growth and adaptation of soybean cultivars under water stress conditions. II. Effects of leaf movement on radiation interception. Japanese Journal of Crop Science 63(4): 699-705, 1994

Growth analysis of cotton crops infested with spider mites: I. Light interception and radiation-use efficiency. Crop Science 37(2): 481-491, 1997

LeMYC2 acts as a negative regulator of blue light mediated photomorphogenic growth, and promotes the growth of adult tomato plants. Bmc Plant Biology 14: 38, 2014

Influence of low light intensity on growth and biomass allocation, leaf photosynthesis and canopy radiation interception and use in two forage species of Centrosema (DC.) Benth. Grass and Forage Science 73(4): 967-978, 2018

Radiation-induced release of transforming growth factor alpha activates the epidermal growth factor receptor and mitogen-activated protein kinase pathway in carcinoma cells, leading to increased proliferation and protection from radiation-induced cell death. Molecular Biology of the Cell 10(8): 2493-2506, 1999

Seasonal light interception, radiation use efficiency, growth and tuber production of the tuber crop Plectranthus edulis. European Journal of Agronomy 45: 153-164, 2013

Larger yields of mixtures than monocultures of cultivated grassland species match with asynchrony in shoot growth among species but not with increased light interception. Field Crops Research 194: 1-11, 2016

Effects of low light on morphological and physiological indexes of tomato at different growth stages. Acta Horticulturae Sinica 29(2): 123-127, 2002

High-throughput estimation of incident light, light interception and radiation-use efficiency of thousands of plants in a phenotyping platform. New Phytologist 212(1): 269-281, 2016

Effect of sowing date, planting density and cultivar on solar radiation interception indices in sugar beet I Radiation interception and extinction coefficient. Journal Of Sugar Beet: 1, Pe23-Pe42, En3-4, 2008

Improving Apple Packinghouse Food Safety in Washington State with Tailored Workshop Modules. Hortscience 52(9): S227, 2017

Diurnal light interception and a computer model of light interception by hedgerow apple orchards. Journal of Applied Ecology 14(2): 6O1-614, 1976