The effect of natural UV-B radiation on a perennial Salicornia salt-marsh in Bahía San Sebastián, Tierra del Fuego, Argentina: a 3-year field study

Bianciotto, Oscar; Pinedo, Luis B.; Roman, Nemesio Amaro San; Blessio, A. Y.; Collantes, Marta B.

doi:10.1016/s1011-1344(03)00089-7

Cited by 19 publications

(22 citation statements)

References 32 publications

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“…Our results on buckwheat development were in accordance with previous studies on Salicornia ambigua (Bianciotto et al, 2003), Dimorphotheca pluvialis (Wand et al, 1996), Colobanthus quitensis and Deschampsia Antarctica ). The mechanism responsible for the UV-B-induced stimulation of reproduction has been unknown until now.…”

Section: Effect Of Uv-b Radiation On Plant Growth Development and Prsupporting

confidence: 93%

Effects of ultraviolet-B radiation on crop growth, development, yield and leaf pigment concentration of tartary buckwheat (Fagopyrum tataricum) under field conditions

Yao

Xuan

et al. 2006

European Journal of Agronomy

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Section: Effect Of Uv-b Radiation On Plant Growth Development and Prsupporting

confidence: 93%

Effects of ultraviolet-B radiation on crop growth, development, yield and leaf pigment concentration of tartary buckwheat (Fagopyrum tataricum) under field conditions

Yao

Xuan

et al. 2006

European Journal of Agronomy

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“…13 Although the possibility of alterations in the quality and quantity of root exudates has been raised in connection with studies that reported UV-B-induced changes in soil microbial communities, 10,11,14 we have no knowledge of controlled testing of the effects of increased UV-B radiation on root exudation or rhizospheric processes in any other plant system other than rice. 15 Most of the studies pertaining to the effect of UV light on plant growth ranges from wild plant species are limited to African savanna, 16 arctic ecosystems, 17 salt marshes 18,19 and Mediterranean ecosystems. 20 Little or no information exists on the potential impacts of UV-B radiation on exotic species and their invasive behavior.…”

Section: Introductionmentioning

confidence: 99%

Phragmites australisroot secreted phytotoxin undergoes photo-degradation to execute severe phytotoxicity

Rudrappa

Choi

Levia

et al. 2009

Plant Signaling & Behavior

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Our study organism, Phragmites australis (common reed), is a unique invader in that both native and introduced lineages are found coexisting in North America. This allows one to make direct assessments of physiological differences between these different subspecies and examine how this relates to invasiveness. Recent efforts to understand plant invasive behavior show that some invasive plants secrete a phytotoxin to ward-off encroachment by neighboring plants (allelopathy) and thus provide the invaders with a competitive edge in a given habitat. Here we show that a varying climatic factor like ultraviolet (UV) light leads to photo-degradation of secreted phytotoxin (gallic acid) in P. australis rhizosphere inducing higher mortality of susceptible seedlings. The photo-degraded product of gallic acid (hereafter GA), identified as mesoxalic acid (hereafter MOA), triggered a similar cell death cascade in susceptible seedlings as observed previously with GA. Further, we detected the biological concentrations of MOA in the natural stands of exotic and native P. australis. Our studies also show that the UV degradation of GA is facilitated at an alkaline pH, suggesting that the natural habitat of P. australis may facilitate the photo-degradation of GA. The study highlights the persistence of the photo-degraded phytotoxin in the P. australis's rhizosphere and its inhibitory effects against the native plants.

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“…This phenomenon has resulted in increasing levels of ultraviolet radiation B (UVBR: 280-320 nm) (Seckmeyer and Mckenzie 1992), reaching not only the Antarctic region, but also the southernmost part of South America (Chile and Argentina) (Kirchhoff et al 1997;Bianciotto et al 2003). During spring, when the area of the ozone hole increases and the stratospheric vortex elongates, the southern tip of South America is often under the influence of the ozone hole (Diaz et al 2006).…”

Section: Introductionmentioning

confidence: 99%

UVB effects on early developmental stages of commercially important macroalgae in southern Chile

2007

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The effect of natural UV-B radiation on a perennial Salicornia salt-marsh in Bahía San Sebastián, Tierra del Fuego, Argentina: a 3-year field study

Cited by 19 publications

References 32 publications

Effects of ultraviolet-B radiation on crop growth, development, yield and leaf pigment concentration of tartary buckwheat (Fagopyrum tataricum) under field conditions

Effects of ultraviolet-B radiation on crop growth, development, yield and leaf pigment concentration of tartary buckwheat (Fagopyrum tataricum) under field conditions

Phragmites australisroot secreted phytotoxin undergoes photo-degradation to execute severe phytotoxicity

UVB effects on early developmental stages of commercially important macroalgae in southern Chile

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