Ozone changes the linear relationship between photosynthesis and stomatal conductance and decreases water use efficiency in rice

Masutomi, Yuji; Kinose, Yoshiyuki; Takimoto, Tetsuya; Yonekura, Tetsushi; Oue, Hiroki; Kobayashi, Kazuhiko

doi:10.1016/j.scitotenv.2018.11.132

Cited by 31 publications

(21 citation statements)

References 43 publications

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“…The correlation between CO 2 fixation and g s and empirical relationship between A and g s are crucial in understanding how elevated O 3 impairs photosynthetic capacity (Choquette et al, 2019; Li et al, 2019; Masutomi et al, 2019). c i : c a was positively correlated with g s in ambient and elevated O 3 (Figure 6).…”

Section: Discussionmentioning

confidence: 99%

“…More recently, the BWB model has been applied to estimate the effect of elevated O 3 on the relationship between photosynthesis and g s . For example, elevated O 3 changed the relationship between photosynthesis and g s by increasing the intercept of the BWB model in rice (Masutomi et al, 2019), but did not alter BWB model parameters in switchgrass (Li, Courbet, Ourry, & Ainsworth, 2019). However, it is unclear how elevated O 3 concentration alters the parameters of these stomatal models in different sorghum lines.…”

Section: Introductionmentioning

confidence: 99%

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Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations

Moller

Mitchell

et al. 2021

Plant Cell & Environment

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Elevated tropospheric ozone concentration (O3) significantly reduces photosynthesis and productivity in several C4 crops including maize, switchgrass and sugarcane. However, it is unknown how O3 affects plant growth, development and productivity in sorghum (Sorghum bicolor L.), an emerging C4 bioenergy crop. Here, we investigated the effects of elevated O3 on photosynthesis, biomass and nutrient composition of a number of sorghum genotypes over two seasons in the field using free‐air concentration enrichment (FACE), and in growth chambers. We also tested if elevated O3 altered the relationship between stomatal conductance and environmental conditions using two common stomatal conductance models. Sorghum genotypes showed significant variability in plant functional traits, including photosynthetic capacity, leaf N content and specific leaf area, but responded similarly to O3. At the FACE experiment, elevated O3 did not alter net CO2 assimilation (A), stomatal conductance (gs), stomatal sensitivity to the environment, chlorophyll fluorescence and plant biomass, but led to reductions in the maximum carboxylation capacity of phosphoenolpyruvate and increased stomatal limitation to A in both years. These findings suggest that bioenergy sorghum is tolerant to O3 and could be used to enhance biomass productivity in O3 polluted regions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations

Moller

Mitchell

et al. 2021

Plant Cell & Environment

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“…In switchgrass, this was not observed, and both A and g s were proportionally affected, leading to no change in iWUE or the slope of the BWB model. To our knowledge, this is the first study to test how the slope of the BWB is affected by elevated O 3 in C 4 species, but, in rice, elevated O 3 -induced changes in the BWB relationship were observed in O 3 sensitive cultivars, but not more tolerant cultivars [43]. In sugarcane, the degree to which A and g s were affected by elevated O 3 varied with genotype [57], thus it is possible that slope of the BWB relationship was also impacted, but this was not explicitly tested.…”

Section: Discussionmentioning

confidence: 99%

“…The Ball–Woodrow–Berry (BWB) relationship was calculated as:gs = aAHsCs + b where g s is stomatal conductance to water vapor (mol (H 2 O) m −2 s −1 ); A is net CO 2 assimilation rate (µmol (CO 2 ) m −2 s −1 ); H s and C s are relative humidity (Pa (air) Pa (Saturated) −1 ) and CO 2 concentration (Pa (CO 2 ) Pa (air) −1 ) at the leaf surface, respectively; and a and b are the slope (mol (H 2 O) mol (CO 2 ) −1 ) and intercept (mol (H 2 O) m −2 s −1 ) of the BWB relationship, respectively [43,48].…”

Section: Methodsmentioning

confidence: 99%

“…In addition, the photosynthetic apparatus can be damaged by O 3 leading to reduced ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) activity in the chloroplast, lower rates of carbon fixation and reduced quantum yield of primary photochemistry [33,38,39,40,41,42]. O 3 has also been shown to alter the relationship between photosynthesis and stomatal conductance and reduce water use efficiency [43]. However, O 3 effects on stomatal conductance vary greatly across plant species and depend on levels of O 3 exposure [44].…”

Section: Introductionmentioning

confidence: 99%

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Elevated Ozone Concentration Reduces Photosynthetic Carbon Gain but Does Not Alter Leaf Structural Traits, Nutrient Composition or Biomass in Switchgrass

Shuai

Courbet

Ourry

et al. 2019

Plants

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Elevated tropospheric ozone concentration (O3) increases oxidative stress in vegetation and threatens the stability of crop production. Current O3 pollution in the United States is estimated to decrease the yields of maize (Zea mays) up to 10%, however, many bioenergy feedstocks including switchgrass (Panicum virgatum) have not been studied for response to O3 stress. Using Free Air Concentration Enrichment (FACE) technology, we investigated the impacts of elevated O3 (~100 nmol mol−1) on leaf photosynthetic traits and capacity, chlorophyll fluorescence, the Ball–Woodrow–Berry (BWB) relationship, respiration, leaf structure, biomass and nutrient composition of switchgrass. Elevated O3 concentration reduced net CO2 assimilation rate (A), stomatal conductance (gs), and maximum CO2 saturated photosynthetic capacity (Vmax), but did not affect other functional and structural traits in switchgrass or the macro- (except potassium) and micronutrient content of leaves. These results suggest that switchgrass exhibits a greater O3 tolerance than maize, and provide important fundamental data for evaluating the yield stability of a bioenergy feedstock crop and for exploring O3 sensitivity among bioenergy feedstocks.

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Yield loss in rice by acute ozone pollution could be recovered

Zhang

Cao

et al. 2022

Agricultural & Env Letters

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Rising concentration of surface O3 threatens crop production and food security. To improve the evaluation and develop efficient adaptations, it is essential to study the effects of acute O3 pollution. We adopted this study by open‐top chamber (OTC) method and found that the fumigation of elevated O3 (NF40) for short (tillering and jointing, heading and ripening) and long periods during rice growth reduced the grain yield by 17, 19 and 25%, respectively, showing that both of the acute and chronic O3 pollution reduce rice production. Moreover, in comparison with the plants under chronic O3 pollution, grain yield was increased when O3 was removed at different stages: 32% increment at tillering and jointing and 34% increment at heading and ripening. These results suggest a possibility to recover the yield loss in rice under O3 pollution.

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Ozone changes the linear relationship between photosynthesis and stomatal conductance and decreases water use efficiency in rice

Cited by 31 publications

References 43 publications

Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations

Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations

Elevated Ozone Concentration Reduces Photosynthetic Carbon Gain but Does Not Alter Leaf Structural Traits, Nutrient Composition or Biomass in Switchgrass

Yield loss in rice by acute ozone pollution could be recovered

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