Effects of elevated O3 exposure on nutrient elements and quality of winter wheat and rice grain in Yangtze River Delta, China

Abstract

a b s t r a c tWith the open-top chambers (OTCs) in situ in Yangtze River Delta, China in 2007 and 2008, the effects of elevated O 3 exposure on nutrient elements and quality of winter wheat and rice grain were investigated. Grain yield per plant of winter wheat and rice declined in both years. The N and S concentrations increased under elevated O 3 exposure in both years and CeN ratios decreased significantly. The concentrations of K, Ca, Mg, P, Mn, Cu and Zn in winter wheat and the concentrations of Mg, K, Mn and Cu in rice increased. The concentrations of protein, amino acid and lysine in winter wheat and rice increased and the concentration of amylose decreased. The increase in the nutrient concentration was less than the reduction of grain yield in both winter wheat and rice, and, hence, the absolute amount of the nutrients was reduced by elevated O 3 .

Effects of elevated O3 exposure on seed yield, N concentration and photosynthesis of nine soybean cultivars (Glycine max (L.) Merr.) in Northeast China

“…We found that SN22 and SN26 from the same parents but different breeding generations performed different responses to E-O 3 in seed N concentration despite similar response in seed yield and its component, and eco-physiological characteristics of leaves. The findings from cultivar SN22 supported the results from winter wheat that elevated O 3 increased grain N concentration [36]. But seed N concentration in SN26 showed an opposite tendency toward E-O 3 .…”

Elevated ozone level affects micronutrients bioavailability in soil and their concentrations in wheat tissues

“…Besides, O 3 stress affects plant physiology and thus affects nutrient uptake and transport. The translocation and partitioning of carbohydrates between source (leaves) and sink organs (roots and grains) are often disturbed (Zheng et al 2013). Our findings of reduced root biomass correspond with previous studies.…”

“…and leaf photosynthesis (Back et al 1999), and disturb translocation and partitioning of carbohydrates (Zheng et al 2013). It was found that ozone alone may decrease ethanol-soluble carbohydrate contents in pine needles (Barnes et al 1990) and change the allocation of macro-and-minor nutrients in leaves (Zhuang et al 2017).…”

Plant-Mediated Ecosystem Effects of Tropospheric Ozone

“…To overcome some of these limitations, open-top chambers (OTCs) were developed (Heagle et al 1973) and have been the most widely used O 3 exposure system up to now (e.g. Heagle et al 1988;Jäger et al 1999;Zheng et al 2013;Oksanen et al 2013;Burkart et al 2013). In OTCs, plants can be grown in their natural soil environment, in pots or as artificial model communities (mesocosms).…”