Tropical fruit trees as bioindicators of industrial air pollution in southeast Brazil

Moraes, Regina Maria de; Klumpp, Andreas; Furlan, Cláudia Maria; Klumpp, Gabriele; Domingos, Marisa; Rinaldi, Mirian Cilene Spasiani; Modesto, Irene F.

doi:10.1016/s0160-4120(02)00060-0

Cited by 84 publications

(48 citation statements)

References 17 publications

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“…Despite the poor knowledge about their function, the peroxidase upregulation as a response of the plant to pollutants can already be used for the phytomonitoring of industrial or densely urbanised areas. Peroxidases have been shown to be quite sensitive to atmospheric pollution, with a response that can be stronger than the one of other classical biomarkers, such as superoxide dismutase, glutathione reductase levels (Wu and von Tiedemann 2002) or ascorbate concentration (Moraes et al 2002). Similar observations have been made with heavy metals present in soil (Cho and Park 2000;Geebelen et al 2002), although the response may be lower than that observed with atmospheric stress (Klumpp et al 2000).…”

Section: Chemical Stressesmentioning

confidence: 70%

Peroxidases have more functions than a Swiss army knife

et al. 2005

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Plant peroxidases (class III peroxidases) are present in all land plants. They are members of a large multigenic family. Probably due to this high number of isoforms, and to a very heterogeneous regulation of their expression, plant peroxidases are involved in a broad range of physiological processes all along the plant life cycle. Due to two possible catalytic cycles, peroxidative and hydroxylic, peroxidases can generate reactive oxygen species (ROS) ( • OH, HOO• ), polymerise cell wall compounds, and regulate H 2 O 2 levels. By modulating their activity and expression following internal and external stimuli, peroxidases are prevalent at every stage of plant growth, including the demands that the plant meets in stressful conditions. These multifunctional enzymes can build a rigid wall or produce ROS to make it more flexible; they can prevent biological and chemical attacks by raising physical barriers or by counterattacking with a large production of ROS; they can be involved in a more peaceful symbiosis. They are finally present from the first hours of a plant's life until its last moments. Although some functions look paradoxical, the whole process is probably regulated by a fine-tuning that has yet to be elucidated. This review will discuss the factors that can influence this delicate balance.Keywords Evolution . ROS . (abiotic and biotic) stress . Cell wall loosening and cross-linking . Senescence . Fruit ripening . Symbiosis Multigenic family, evolution and homologyHeme peroxidases specific to plants belong to a superfamily that contains three different classes of peroxidases Communicated by P. Kumar

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Section: Chemical Stressesmentioning

confidence: 70%

Peroxidases have more functions than a Swiss army knife

et al. 2005

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“…This enzyme is widely distributed in higher plants and it participates in various processes including lignification, metabolism of auxins, and response mechanisms to stress conditions caused by salt and heavy metals. Increased POD activity can occur as a metabolic response related to different types of stress conditions (Anderson et al, 1995;Zhang and Kirkham, 1996;Jiménez et al, 1998;Moraes et al, 2002).…”

Section: Titanium and The Activity Of Enzymesmentioning

confidence: 99%

Titanium (Ti) in plant nutrition - A review

Bacilieri¹,

Vasconcelos²,

Lana³

et al. 2017

Aust J Crop Sci

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Several studies have been carried out on the application of titanium in plant nutrition in recent decades. They indicate that this element has a positive effect on crop phenological events such as germination, root formation, vegetative growth, maturation, as well as resistance to biotic or abiotic stress conditions and general crop health status. Titanium has also been reported to boost the uptake of macro and micronutrients, enzymatic activity in plants, and consequently increase yield. Therefore, pioneering studies of foliar applications of titanium in potato crops are being carried out in Brazil. They demonstrate that titanium reduces urease enzyme activity, but increases peroxidase and nitrate reductase activity during potato growth. During tuberization, there is a positive correlation between superoxide dismutase & peroxidase enzyme activity and titanium application. Although the results are promising, more data is needed regarding the effects of this element on crop performance. This review describes the characteristics of this element and reports innovations regarding its use in plant nutrition.

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“…Dentre as mirtáceas, o gênero Psidium L. vem sendo avaliado (Moraes et al 2002;2004;Furlan et al 2006;Pina & Moraes 2007) e tem mostrado resultados promissores, o que incentiva a investigação de outros representantes desta família.…”

Section: Introductionunclassified

Análise estrutural de folhas de Eugenia uniflora L. (Myrtaceae) coletadas em ambientes rural e urbano, SP, Brasil

2008

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São Paulo, diferem quanto à estrutura foliar, de exemplares encontrados em área rural, isenta de poluentes aéreos urbanos. Foram avaliadas, comparativamente, as dimensões da folha e, em microscopia de luz, a espessura dos tecidos foliares, a densidade de estômatos e de cristais da espécie, coletada em área rural e em dois pontos da cidade de São Paulo: canteiro central da Avenida dos Bandeirantes, com tráfego veicular intenso, portanto com alta carga de poluentes primários, e no Parque Estadual das Fontes do Ipiranga (PEFI) submetido a altas concentrações de poluentes secundários. Buscaram-se variações que possam ser decorrentes da poluição urbana. As folhas coletadas no meio urbano mostraram menores dimensões, menor espessura do mesofilo, maior densidade estomática e maior quantidade de cristais. A espessura do parênquima lacunoso sofreu redução, quando se comparam as plantas do ambiente rural e urbano; observou-se a menor espessura nas folhas submetidas a poluentes secundários. Não foram observadas variações qualitativas entre as folhas dos três locais avaliados. Considerando que folhas coletadas no meio urbano variaram menos entre si, quando comparadas àquelas de área rural, acredita-se que a poluição aérea da cidade possa ser responsável, pelo menos em parte, pelas variações observadas. Exposições padronizadas, em ambiente monitorado, devem ser realizadas para comprovar tal hipótese.Palavras-chave: anatomia foliar, Eugenia uniflora, poluição aérea, ambiente urbano, pitanga ABSTRACT -(Leaf anatomy of Eugenia uniflora L. (Myrtaceae) in urban and rural environments, São Paulo State, Brazil). The aim of this study was to compare leaves of Eugenia uniflora from the city of São Paulo with leaves of plants from a rural site. Leaf size, tissue thickness, and stomatal and crystal density of E. uniflora growing at two sites in the city of São Paulo were investigated by light microscopy and compared with samples from a rural area. The level and types of air pollutants varied at the urban sites. Primary pollutants were present on Bandeirantes Avenue and secondary ones in the park (Parque Estadual das Fontes do Ipiranga -PEFI). Urban leaves were smaller, thinner and with higher stomatal and crystal density. We observed greater spongy parenchyma thickness in leaves from the avenue when compared to those from the park. No qualitative differences were observed between urban and rural leaves. Leaves from the two urban sites showed similarities, but were different from rural leaves, so we believe that the differences observed may be attributed to the polluted environment of São Paulo. In order to confirm this hypothesis, control experiments should be done.Key words: leaf anatomy, Eugenia uniflora, air pollution, urban environment, "pitanga" IntroduçãoAs plantas que vivem no meio urbano, numa grande metrópole como São Paulo, sofrem os efeitos da poluição do ar oriunda, principalmente, da grande frota automotiva, que produz uma carga elevada de poluentes gasosos e particulados (CETESB 2004). A observação de troncos de árvores q...

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Tropical fruit trees as bioindicators of industrial air pollution in southeast Brazil

Cited by 84 publications

References 17 publications

Peroxidases have more functions than a Swiss army knife

Peroxidases have more functions than a Swiss army knife

Titanium (Ti) in plant nutrition - A review

Análise estrutural de folhas de Eugenia uniflora L. (Myrtaceae) coletadas em ambientes rural e urbano, SP, Brasil

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