Photosynthetic traits of Siebold's beech and oak saplings grown under free air ozone exposure in northern Japan

Watanabe, Makoto; Hoshika, Yasutomo; Inada, Naoki; Wang, Xiaona; Mao, Qiaozhi; Koike, Takao

doi:10.1016/j.envpol.2012.11.006

Cited by 66 publications

(60 citation statements)

References 49 publications

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“…However, O 3 -induced sluggish response of stomata did not show any relation with LMA (data not shown). Watanabe et al (2013) reported that Siebold's beech (Fagus crenata) showed much greater O 3 injury to photosynthetic traits than that in deciduous oak (Quercus mongolica var. crispula), even though both species had similar LMA.…”

Section: Discussionmentioning

confidence: 99%

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Hoshika

Carriero

Zhu

et al. 2014

Science of The Total Environment

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• Our knowledge of ozone (O 3 ) effects on dynamic stomatal response is still limited.• Determinants of O 3 -induced stomatal sluggishness were examined in deciduous tree species in open-top chambers.• Ozone exposure slowed closing of stomata after leaf cutting.• Stomatal sluggishness was well explained by stomatal O 3 flux per net photosynthesis.• Stomatal sluggishness depended both on ozone flux and on the capacity for detoxification or repair. a b s t r a c t a r t i c l e i n f o Our knowledge of ozone effects on dynamic stomatal response is still limited, especially in Asian tree species. We thus examined ozone effects on steady-state leaf gas exchange and stomatal dynamics in three common tree species of China (Ailanthus altissima, Fraxinus chinensis and Platanus orientalis). Seedlings were grown and were exposed to three levels of ozone in open-top chambers (42, 69, 100 nmol mol −1 daylight average, from 09:00 to 18:00). At steady-state, ozone exposure induced an uncoupling of photosynthesis and stomatal conductance, as the former decreased while the latter did not. Dynamic stomatal response was investigated by cutting the leaf petiole after a steady-state stomatal conductance was reached. Ozone exposure increased stomatal sluggishness, i.e., slowed stomatal response after leaf cutting, in the following order of sensitivity, F. chinensis N A. altissima N P. orientalis. A restriction of stomatal ozone flux reduced the ozone-induced sluggishness in P. orientalis. The ozone-induced impairment of stomatal control was better explained by stomatal ozone flux per net photosynthesis rather than by stomatal ozone flux only. This suggests that ozone injury to stomatal control depends both on the amount of ozone entering a leaf and on the capacity for biochemical detoxification or repair. Leaf mass per area and the density of stomata did not affect stomatal sluggishness.

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Section: Discussionmentioning

confidence: 99%

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Hoshika

Carriero

Zhu

et al. 2014

Science of The Total Environment

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“…Watanabe et al [31] demonstrated that O 3 significantly reduced the V c,max and J max in leaves of beech, but stomatal limitation of photosynthesis was unaffected by O 3 . Similar results were also found in some deciduous and evergreen species such as Liriodendron chinense and Cinnamomum camphora [17,37].…”

Section: Discussionmentioning

confidence: 99%

“…Several studies on native species in Asia reported that O 3 caused visible leaf injury, reduced carbon assimilation, and limited the growth of trees (e.g., Cyclobalanopsis glauca and Fagus crenata [30,31]). In this study, E-O 3 with M8 of 54 ppb significantly caused changes in some photosynthetic parameters at leaf-level and canopy-level, e.g.…”

Section: Discussionmentioning

confidence: 99%

Impacts of elevated ozone on growth and photosynthesis of Metasequoia glyptostroboides Hu et Cheng

et al. 2014

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a b s t r a c tOne-year-old Metasequoia glyptostroboides seedlings were exposed to non-filtered ambient air (NF) and elevated ozone (E-O 3 , NF + 60 ppb) in open-top chambers for two years. E-O 3 accelerated leaf senescence, as indicated by significant decreases in photosynthetic pigment contents with the elongation of O 3 exposure. E-O 3 significantly affected gas exchange and carboxylation, inducing reductions in light-saturated photosynthesis (A sat ), the maximum activity of Rubisco (V c,max ) and the maximum electron transport rate (J max ). Chl a/b, V c,max /J max and stomatal limitation (l) were not affected. Stomatal conductance (g s ) was significantly decreased by E-O 3 in the first year, but remained unchanged in the second year. It can be inferred that the decrease in A sat by E-O 3 was mainly attributed to the changes in non-stomatal factors. After two years' exposure, E-O 3 caused significant decreases in canopy photosynthesis and leaf mass per area, and a significant increase in the number of branches, but induced slight, not significant decreases in growth and biomass. Therefore, it can be concluded that the carbon accumulation of the species M. glyptostroboides could be negatively affected after long-term exposure to high O 3 concentration.

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“…In addition to stomatal limitation, it is assumed that biochemical constraints contributed to decreased efficiency in A in P. torta. Mateos-Naranjo and Perez-Martin (2013) reported that glyphosate decreases the carboxilative efficiency of RuBisCo, possibly by forming reactive oxygen species (Ahsan et al, 2008), which triggers lower efficiency of the Calvin cycle (Watanabe et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Pouteria torta: a native species of the Brazilian Cerrado as a bioindicator of glyphosate action

et al. 2017

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In Brazil, the expansion of agricultural activity and the associated indiscriminate use of herbicides such as glyphosate is directly related to the loss of biodiversity in the Cerrado. The identification of plant species as bioindicators of herbicide action, especially species native to the area, can help in monitoring the impacts of xenobiotics in the remaining Cerrado. Thus, this study was designed to evaluate the possible use of the native Cerrado species Pouteria torta as a bioindicator of glyphosate action via changes in physiological performance. At 16 months after sowing, the effect of glyphosate was evaluated by applying the following doses: 0 (control), 25, 50, 100, 200, 400, 800, and 1200 g a.e. ha -1 . In response to glyphosate, P. torta exhibited reductions in photosynthesis and chloroplastid pigment content, as well as accumulation of shikimic acid and the occurrence of chlorosis and necrosis. These changes demonstrate the high sensitivity of P. torta to glyphosate and its potential for use as a bioindicator of this herbicide.Keywords: phytotoxicity, photosynthetic processes, biomarker, guapeva, herbicide. Pouteria torta: espécie native do Cerrado Brasileiro como bioindicadora da ação do glyphosate ResumoNo Brasil, a expansão da atividade agrícola, aliada a utilização indiscriminada de herbicidas como o glyphosate, possui relação direta com a perda da biodiversidade no Cerrado. A identificação de espécies vegetais bioindicadoras da ação de herbicidas, particularmente as nativas do Cerrado, pode auxiliar em processos de monitoramento dos impactos desse xenobiótico nas remanescentes do Cerrado. Assim, este estudo foi projetado para avaliar o possível uso de Pouteria torta, espécie nativa do cerrado, como bioindicadora da ação do glyphosate via mudanças na sua performance fisiológica. Após 16 meses de semeadura, o efeito do glyphosate foi avaliado quando aplicadas as seguintes doses: 0 (controle), 25, 50, 100, 200, 400, 800 e 1200 g e. a. ha -1 . Em reposta ao glyphosate, as plantas de P. torta apresentaram redução na sua performance do processo fotossintético e no conteúdo de pigmentos cloroplastídicos, além do acúmulo de ácido chiquímico e da ocorrência de cloroses e necroses. Essas alterações demonstram a alta sensibilidade de P. torta ao glyphosate, o que potencializa a sua utilização como bioindicadora da ação desse herbicida.

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Photosynthetic traits of Siebold's beech and oak saplings grown under free air ozone exposure in northern Japan

Cited by 66 publications

References 49 publications

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Impacts of elevated ozone on growth and photosynthesis of Metasequoia glyptostroboides Hu et Cheng

Pouteria torta: a native species of the Brazilian Cerrado as a bioindicator of glyphosate action

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