Ozone stress in woody plants assessed with chlorophyll a fluorescence. A critical reassessment of existing data

Bussotti, Filippo; Desotgiu, Rosanna; Cascio, Chiara; Pollastrini, Martina; Gravano, Elisabetta; Gerosa, Giacomo; Marzuoli, Riccardo; Nali, Cristina; Lorenzini, Giacomo; Salvatori, Elisabetta; Manes, Fausto; Schaub, Marcus; Strasser, Reto J.

doi:10.1016/j.envexpbot.2010.10.022

Cited by 122 publications

(88 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This arrangement may show both the photochemical ozone formation process and the occurrence of photoinhibition. Bussotti et al (2011) have shown that several parameters of chlorophyll a fluorescence are affected by exposure to O 3 in temperate tree species. However, it should be noted that 'Paluma' is cultivated in the full sun conditions and that high levels of O 3 and light energy generally occur simultaneously, since a high intensity of radiation is an essential condition for the formation of ozone in the troposphere.…”

Section: Resultsmentioning

confidence: 99%

Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ

Pina

Meirelles

Moraes

2017

Hoehnea

View full text Add to dashboard Cite

-(Meteorological conditions, ozone concentration, and leaf age affect gas exchange in Psidium guajava ‛Paluma'). This study aimed to investigate the importance of leaf age, meteorological conditions and ozone concentration (O 3 ) on gas exchange of Psidium guajava ‛Paluma'. Saplings were grown and exposed in standard conditions in the city of São Paulo, in six periods of three months with weekly measurements in young and mature leaves. Gas exchanges were higher in young leaves for almost the entire experiment. Mature leaves showed greater reduction in gas exchange. The multivariate analysis of biotic and abiotic variables indicated that vapor pressure deficit (VPD), O 3 concentration and radiation were the main variables associated with gas exchange decrease in young leaves. In mature leaves the influence of VPD is lower, but the temperature importance is higher. Moreover, the opposition between assimilation and O 3 is more evident in mature leaves, indicating their greater sensitivity to O 3 . Keywords: carbon assimilation, ozone phytotoxicity, stomatal conductance RESUMO -(Condições meteorológicas, concentração de ozônio e idade da folha afetam as trocas gasosas em Psidium guajava 'Paluma'). Este estudo teve como objetivo investigar a influência da idade da folha, das condições meteorológicas e da concentração do ozônio (O 3 ) nas trocas gasosas em Psidium guajava 'Paluma'. Plantas jovens foram cultivadas e expostas de modo padronizado na cidade de São Paulo, SP, em seis períodos de três meses, com medidas semanais em folhas jovens e maduras. As trocas gasosas foram mais altas nas folhas jovens durante quase todo o experimento. As folhas maduras apresentaram maior redução das trocas gasosas. A análise multivariada das variáveis bióticas e abióticas indicou que o déficit de pressão de vapor (DPV), a concentração de O 3 e a radiação foram as principais variáveis associadas à redução das trocas gasosas nas folhas jovens. Nas folhas maduras a influencia do DPV é menor, mas a da temperatura é maior. Por outro lado, a oposição entre assimilação e O 3 é mais evidente nas folhas maduras, indicando sua maior sensibilidade ao O 3 . Palavras-chave: assimilação de carbono, condutância estomática, fitotoxicidade do ozônio

show abstract

Section: Resultsmentioning

confidence: 99%

Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ

Pina

Meirelles

Moraes

2017

Hoehnea

View full text Add to dashboard Cite

show abstract

“…According to Cambrollé et al (2012), chlorosis and growth inhibition are described as common symptoms in most plants grown at high Cu concentrations. In this study, plants grown at 0.041 and 0.082 mM Cu concentrations showed no difference in growth parameters; however, exposure to 0.164 mM Cu concentration caused a drastic decrease in the analyzed variables (p < 0.05; Figure 1).…”

Section: Resultsmentioning

confidence: 99%

“…The highest Cu concentrations (0.082 and 0.164 mM) caused a significant decrease of 69% in chlorophyll content (p = 0.0001; Figure 1D). According to Xiong et al (2006) and Adamski et al (2011), chlorophyll biosynthesis is dependent on the supply of assimilated N and Fe, and substitution of the central Mg ion by Cu in the chlorophyll molecule causes damage to the chlorophyll-synthesizing system (CAMBROLLÉ et al, 2013). The mineral profile of the sweet potato plants (Figure 2) suggests that higher concentrations of Cu (0.082 and 0.164 mM) (1) considerably reduced the foliar concentration of some macronutrients, such as Mg, Ca, and N; (2) caused Fe immobilization in the roots and this micronutrient was probably not translocated to chlorophyll synthesis system in the leaves; and (3) led to the degradation of chlorophyll molecules (MATEOS-NARANJO et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…Plants that grow in environments with high Cu concentrations can develop defense mechanisms against toxicity (CAMBROLLÉ et al, 2013). The extent of such tolerance and the degree of adaptation are highly variable, and efficiency and capacity of detoxification mechanisms play an important role (BOOJAR;GOODARZI, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Environmental contamination by heavy metals has become a serious problem for plants, animals, aquatic life, and humans (HARICHOVÁ et al, 2012). Among the different toxic heavy metals in the environment, Cu is the most important and studied contaminant (CAMBROLLÉ et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physiological responses of sweet potato (Ipomoea batatas L.) plants due to different copper concentrations

et al. 2015

View full text Add to dashboard Cite

At low concentrations, Cu is considered as an essential micronutrient for plants and as a constituent and activator of several enzymes. However, when in excess, Cu can negatively affect plant growth and metabolism. Therefore, the aim of this study was to evaluate physiological responses of sweet potato plants at different Cu concentrations by measuring morphological parameters, antioxidant metabolism, stomatal characteristics, and mineral profile. For this purpose, sweet potato plants were grown hydroponically in complete nutrient solution for six days. Then, the plants were transferred to solutions containing different Cu concentrations, 0.041 (control), 0.082, and 0.164 mM, and maintained for nine days. The main effect of increased Cu concentration was observed in the roots. The sweet potato plants grown in 0.082 mM Cu solution showed increased activity of antioxidant enzymes and no changes in growth parameters. However, at a concentration of 0.164 mM, Cu was transported from the roots to the shoots. This concentration altered morpho-anatomical characteristics and activated the antioxidant system because of the stress generated by excess Cu. On the basis of the results, it can be concluded that the sweet potato plants were able to tolerate Cu toxicity until 0.082 mM. Key words: Micronutrient, antioxidant metabolism, mineral content, copper sulfate, stress ResumoO cobre, em baixas concentrações, é considerado micronutriente essencial para as plantas por ser constituinte e ativador de diversas enzimas. Porém, quando em excesso, pode afetar negativamente o crescimento, o desenvolvimento e o metabolismo vegetal. Com base no exposto, o objetivo do trabalho foi avaliar as respostas fisiológicas de plantas de batata-doce quando submetidas a diferentes concentrações de cobre através dos parâmetros morfológicos, índice de clorofila, metabolismo antioxidante, perfil mineral e características estomáticas. Para tanto, as mesmas foram cultivadas em sistema hidropônico com solução nutritiva completa por seis dias. Após este período foram transferidas para soluções contendo diferentes concentrações de cobre: 0,041 (controle); 0,082 e 0,164 mM, onde permaneceram por nove dias. Nas raízes, o principal efeito do aumento da concentração de cobre foi o acúmulo do mesmo nesse órgão. As plantas de batata-doce cultivadas com 0,082 mM de cobre na solução, apresentaram aumento da atividade das enzimas antioxidantes sem nenhuma alteração na taxa de crescimento. No entanto, na concentração de 0,164 mM, o cobre foi transportado das raízes para a parte aérea. Essa concentração reduziu o crescimento, alterou características morfo-anatômicas e ativou o sistema antioxidante como forma de proteção ao estresse gerado pelo excesso de cobre. Com base nos resultados, pode-se concluir que as plantas de batata-doce foram capazes de tolerar a toxidez por Cu até a concentração de 0,082 mM. Palavras-chave: Micronutriente, perfil mineral, sulfato de cobre, estresse

show abstract

Impacts of Particulate Matter Pollution on Plants

Singh,

Verma

2023

Environmental Science and Engineering

View full text Add to dashboard Cite

Ozone stress in woody plants assessed with chlorophyll a fluorescence. A critical reassessment of existing data

Cited by 122 publications

References 81 publications

Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ

Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ

Physiological responses of sweet potato (Ipomoea batatas L.) plants due to different copper concentrations

Impacts of Particulate Matter Pollution on Plants

Contact Info

Product

Resources

About