Acclimation to soil flooding — sensing and signal-transduction

Visser, Eric J. W.; Voesenek, L.A.C.J.

doi:10.1007/1-4020-4099-7_10

Cited by 52 publications

(59 citation statements)

References 129 publications

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“…Embora as respostas das plantas pela sinalização do etileno sejam bem definidas, os resultados obtidos sobre a sinalização de oxigênio são descobertas recentes (Visser & Voesenek 2004 (Visser & Voesenek 2004). Klok et al (2002) estudaram as alterações nos padrões de expressão gênica em plantas de Arabidopsis sob alagamento.…”

Section: Sinalização Metabólica E Hormonal Durante O Alagamentounclassified

“…As principais classes de genes afetadas foram: (1) genes envolvidos no metabolismo do etanol; (2) genes que desempenham funções no processo "pós-injúria"; (3) genes relacionados ao metabolismo de etileno, incluindo a sua síntese e sinalização e (4) genes envolvidos no processo de morte celular programada e alongamento da parede celular. Segundo Visser & Voesenek (2004), as duas primeiras classes de genes poderiam ser interpretadas como pré-adaptativas, pois dariam continuidade à produção de energia em futuros episódios de alagamento, aumentando as chances de sobrevivência da planta. As categorias 3 e 4 estão relacionadas com a formação de aerênquima, o que prepara a planta para um período mais longo de alagamento.…”

Section: Sinalização Metabólica E Hormonal Durante O Alagamentounclassified

“…Este último gene regula negativamente a expressão do primeiro e o primeiro controla positivamente o último. Segundo Visser & Voesenek (2004), esse sistema funciona como um sistema reostatizado que regula os níveis endógenos de H 2 O 2 sendo crucial para o tecido pois, se a concentração de peróxido de hidrogênio aumentar muito no tecido, o programa de morte celular poderá ser disparado.…”

Section: Sinalização Metabólica E Hormonal Durante O Alagamentounclassified

“…A formação deste tipo de raiz é classicamente associada às auxinas. Quando uma planta é alagada, o mau funcionamento das raízes leva grande parte destas à morte e ao mesmo tempo, como ocorre em varias espécies, a indução da produção de raízes adventícias que possuem aerênquima (Visser & Voesenek 2004).…”

Section: Sinalização Metabólica E Hormonal Durante O Alagamentounclassified

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Respostas fisiológicas de plantas amazônicas de regiões alagadas às mudanças climáticas globais

Grandis¹,

Godoi²,

Buckeridge³

2010

Rev. bras. Bot.

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-(Physiological responses of Amazonian flooded plants to the global climate change). According to the last report of IPCC (Intergovernmental Panel of Climatic Change, 2007) an increase in atmospheric CO 2 concentration to ca. 0.072% is predicted to occur until the middle of this century. As a result, a tandem elevation of temperature of ca. +3 °C and a decrease in precipitation are to be expected. It has also been suggested that this scenario may lead to a gradual substitution of the tropical forest for savanna-like vegetation in Eastern parts of the Amazon. Within this perspective, a worth question is how the tree species that make up the Amazonian floodplains will respond to the global climatic change? Although predictions have been quite pessimistic, flooding of part of the Amazon will continue to occur for several years and it is important to understand its synergistic effects within the scenario of climate change. In this work, features related to plant metabolism and hormonal signaling during flooding is revised, and the possible effects that the climatic changes might have on plants from the Amazon are discussed. The information available in the literature suggests that under flooding, plants tend to mobilize storage compounds to supply carbon demand needed for maintenance metabolism under the effect of stress caused by the lack of oxygen. In contrast, under elevated CO 2 concentration, plants tend to increase photosynthesis and biomass. With an increase of about 3 °C these parameters may increase even more. Alternatively, with flooding, there is a general decrease in growth potential and it is possible that while favorable conditions of elevated CO 2 and temperature prevail, the positive effects may be counterbalanced by the negative effects of flooding. Thus, the physiological responses might be imperceptible or promote further growth up to the middle of the 21 st Century for most species that occur in the floodplains. However, if temperature and CO 2 levels surpass the threshold of optimal conditions for most plants, a decrease in physiological activity is to be expected.

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Section: Sinalização Metabólica E Hormonal Durante O Alagamentounclassified

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Respostas fisiológicas de plantas amazônicas de regiões alagadas às mudanças climáticas globais

Grandis¹,

Godoi²,

Buckeridge³

2010

Rev. bras. Bot.

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“…However, when studying the alterations in gene expression patterns in Arabidopsis plants under flood conditions, Klok et al (2002) defined some gene classes that are more affected by these conditions, including genes involved in ethanol metabolism, which could characterise a pre-adaptive condition because it allows for continued ATP production (VISSER;VOESENEK, 2004).…”

Section: Discussionmentioning

confidence: 99%

Antioxidant activity and fermentative metabolism in the plant Erythrina crista-galli L. under flood conditions

et al. 2016

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This study aimed to evaluate the mechanisms of flood tolerance of the root system of Erythrina cristagalli L. plants by measuring the activity of antioxidant enzymes and oxidative stress components in the leaves and roots. Additionally, the activity of fermentation enzymes in the roots was measured. The following two treatments were used: plants with flooded roots, which were maintained at a given water level above the soil surface, and non-flooded plants, which were used as the control. The measurements were performed at 10, 20, 30, 40, and 50 days after treatment. The following parameters were evaluated at each time-point: the activities of superoxide dismutase, catalase and ascorbate peroxidase, the quantification of lipid peroxidation and hydrogen peroxide (H 2 O 2 ) content in the leaves, roots, and adventitious roots, and the activities of lactate dehydrogenase, pyruvate decarboxylase and alcohol dehydrogenase in both the primary and adventitious roots. There was an increase in the activity of catalase and ascorbate peroxidase in the leaves to maintain stable H 2 O 2 levels, which reduced lipid peroxidation. In the roots, higher activity of all antioxidant enzymes was observed at up to 30 days of flooding, which favoured both reduced H 2 O 2 levels and lipid peroxidation. Activity of the fermentation enzymes was observed in the primary roots from the onset of the stress conditions; however, their activity was necessary only in the adventitious roots during the final periods of flooding. In conclusion, E. crista-galli L. depends on adventitious roots and particularly on the use of the fermentation pathway to tolerate flood conditions. Key words: Fabaceae. Hypoxia. Oxidative stress. Riparian forest. Tolerance. ResumoO objetivo deste trabalho foi determinar os mecanismos de tolerância ao alagamento de plantas de Erythrina crista-galli L., por meio da avaliação da atividade de enzimas antioxidantes e fermentativas, assim como dos componentes do estresse oxidativo em folhas e raízes. Plantas oriundas de sementes foram cultivadas em vasos com capacidade para 0,5 litros em casa de vegetação e transferidas para vasos de cinco litros. Foram utilizados dois tratamentos: plantas alagadas nas raízes com a manutenção de uma lâmina de água acima da superfície do solo e plantas não alagadas (controle). As avaliações foram realizadas aos 10, 20, 30, 40 e 50 dias após a indução dos tratamentos. O delineamento experimental utilizado foi em blocos ao acaso e os resultados obtidos submetidos à análise de variância e analisados por comparação de médias pelo Teste de Tukey. Em cada período foram avaliadas a atividade de superóxido dismutase, catalase, ascorbato peroxidase, quantificação da peroxidação lipídica e teores de peróxido de hidrogênio em folhas, raízes e raízes adventícias; a atividade das enzimas lactato desidrogenase, piruvato descarboxilase e álcool desidrogenase nas raízes principais e adventícias. Foi verificado um aumento na atividade das enzimas ascorbato peroxidase e catalase nas folhas para manter est...

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Architectural and anatomical responses of maize roots to agronomic practices in a semi‐arid environment

Zhan

Liu

Yue

et al. 2019

J. Plant Nutr. Soil Sci.

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Root architecture and anatomy are important determinants of nitrogen (N) and water acquisition, but they are also environmentally plastic to adapt to N and water availability. Therefore, understanding the relationship between root traits and environmental factors is essential for improving N and water acquisition. A field experiment was conducted in the semi‐arid region of the Loess Plateau in northwestern China to quantify the architectural and anatomical root traits of maize (Zea mays L.) in response to plastic film mulching and N fertilization. We compared four treatments: non‐mulching with and without N supply as well as plastic film mulching with and without N supply. Variation existed for all root architecture and anatomy traits within maize root crowns. Crown and brace root angles to the soil line decreased in response to film mulching and N fertilization. Crown roots under plastic film mulching showed a significantly decreased distance to branching, reduced lateral root length, and overall increased root diameter. Similarly, N application significantly decreased the distance to branching, yet induced more compact and denser crown roots, and increased the root diameter. Brace roots exhibited an increased distance to branching, greater lateral root length and density, as well as a larger root diameter in response to plastic film mulching and N fertilization. Additionally, the accumulated number of nodal roots increased greatly under plastic film mulching and N treatments. At the anatomical level, N application reduced the proportion of the root cortical aerenchyma area. In contrast, aerenchyma area, cortex cell size, and late metaxylem vessel diameter were increased as a result of plastic film mulching. These results demonstrate root architectural and anatomical traits respond to mulching practices and N fertilization.

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Acclimation to soil flooding — sensing and signal-transduction

Cited by 52 publications

References 129 publications

Respostas fisiológicas de plantas amazônicas de regiões alagadas às mudanças climáticas globais

Respostas fisiológicas de plantas amazônicas de regiões alagadas às mudanças climáticas globais

Antioxidant activity and fermentative metabolism in the plant Erythrina crista-galli L. under flood conditions

Architectural and anatomical responses of maize roots to agronomic practices in a semi‐arid environment

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