Calcium‐Dependent Tolerant Response of Cell Wall in Maize Mesocotyl Under Flooding Stress

Porto, Brenda Neves; Alves, José Donizeti; Magalhães, P. C.; Castro, Evaristo Mauro de; Campos, Nádia Alves; Souza, Kamila Rezende Dázio de; Magalhães, Marcelo Murad; Andrade, Cínthia Aparecida; Santos, Meline Oliveira

doi:10.1111/j.1439-037x.2012.00535.x

Cited by 14 publications

(5 citation statements)

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“…While in other tree species the activation of the antioxidant defense system as indicative of tolerance or sensitivity under soil waterlogging conditions has been studied, showing a direct relationship between increased antioxidant enzymes activity and stress tolerance (Blokhina et al 2003, Arbona et al 2008, Hossain et al 2009, Porto et al 2013, no information exists concerning avocado tree antioxidant response under low soil oxygen concentrations. In this work, antioxidant enzyme activities remained unchanged in roots and decreased significantly in leaves of waterlogged plants (Fig.…”

Section: Discussionmentioning

confidence: 99%

Growth, photosynthetic performance and antioxidative response of 'Hass' and 'Fuerte' avocado (Persea americana Mill.) plants grown under high soil moisture

Doupis¹,

Kavroulakis²,

Psarras³

et al. 2017

Photosynt.

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Hass' and 'Fuerte' avocado plants were grown under well-watered or waterlogged conditions. Results indicated significant effects on the majority of the allometric parameters in waterlogged plants, with 'Fuerte' displaying a more pronounced growth inhibition. Waterlogged conditions caused a progressive and simultaneous decline in net photosynthetic rate and stomatal conductance, earlier in 'Fuerte' than in 'Hass'. Maximal potential quantum yield of PSII was unaffected by the soil water regime and/or variety and leaf water potential values in waterlogged plants were not more negative compared with control plants. 'Fuerte' waterlogged plants exhibited increased contents of thiobarbituric acid reactive substances, whereas oxidative injury was not detected in 'Hass'. Finally, none of the two cultivars displayed valuable antioxidant potential, as evidenced by the decreased activities of the antioxidant enzymes superoxide dismutase, guaiacol peroxidase, glutathione peroxidase, and ascorbate peroxidase.

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Section: Discussionmentioning

confidence: 99%

Growth, photosynthetic performance and antioxidative response of 'Hass' and 'Fuerte' avocado (Persea americana Mill.) plants grown under high soil moisture

Doupis¹,

Kavroulakis²,

Psarras³

et al. 2017

Photosynt.

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“…The plant cell wall, and especially the cell wall proteins, undergoes adjustments under stress, as reported previously [67, 68]. The cell wall proteins exhibit functions involved in the morphogenesis and signal transduction of plants, and changes in the cell wall are a sign of cell differentiation [11].…”

Section: Discussionmentioning

confidence: 78%

Expression profiling of Chrysanthemum crassum under salinity stress and the initiation of morphological changes

et al. 2017

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Chrysanthemum crassum is a decaploid species of Chrysanthemum with high stress tolerance that allows survival under salinity stress while maintaining a relatively ideal growth rate. We previously recorded morphological changes after salt treatment, such as the expansion of leaf cells. To explore the underlying salinity tolerance mechanisms, we used an Illumina platform and obtained three sequencing libraries from samples collected after 0 h, 12 h and 24 h of salt treatment. Following de novo assembly, 154,944 transcripts were generated, and 97,833 (63.14%) transcripts were annotated, including 55 Gene Ontology (GO) terms and 128 Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways. The expression profile of C. crassum was globally altered after salt treatment. We selected functional genes and pathways that may contribute to salinity tolerance and identified some factors involved in the salinity tolerance strategies of C. crassum, such as signal transduction, transcription factors and plant hormone regulation, enhancement of energy metabolism, functional proteins and osmolyte synthesis, reactive oxygen species (ROS) scavenging, photosystem protection and recovery, and cell wall protein modifications. Forty-six genes were selected for quantitative real-time polymerase chain reaction detection, and their expression patterns were shown to be consistent with the changes in their transcript abundance determined by RNA sequencing.

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“…Quanto ao tempo de alagamento, Porto et al (2013) constataram redução na expressão de SOD em mesocótilo de plantas C18 alagadas por até 7 dias. Isso mostra que a SOD pode apresentar variações em sua expressão e sintetizar diferentes números de isoformas de acordo com o tecido, a espécie e o tipo de estresse (Zanandrea et al, 2009).…”

Section: Resultsunclassified

Etileno e peróxido de hidrogênio na formação de aerênquima em milho tolerante a alagamento intermitente

Pires

Castro

Magalhães

et al. 2015

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o papel do etileno e do peróxido de hidrogênio (H 2 O 2 ) na formação do aerênquima em ciclos de seleção genética da cultivar de milho BRS 4154, sob alagamento. Plantas dos ciclos C1 e C18 foram submetidas a alagamento por 7 dias, com coleta das raízes aos 0 (controle, sem alagamento), 1 e 7 dias. Foram analisados: a expressão gênica das enzimas ACC sintase (ACS), ACC oxidase (ACO), dismutase do superóxido (SOD) e peroxidase do ascorbato (APX); a produção de etileno e o conteúdo de H 2 O 2 ; a atividade da enzima ACO; e a proporção de aerênquima no córtex. Não houve expressão de ACS e ACO. Houve variação na atividade de ACO e na produção de etileno. A expressão da SOD foi maior em plantas C1 e a da APX, em C18, com redução aos 7 dias. O conteúdo de H 2 O 2 não diferiu entre os tratamentos. A proporção de aerênquima aumentou com o tempo, tendo sido maior em plantas C18 e relacionada à taxa de formação do aerênquima. O tempo de alagamento e o nível de tolerância do ciclo de seleção influenciam a produção do etileno. A expressão da APX indica maior produção de H 2 O 2 no início do alagamento.Termos para indexação: Zea mays, anatomia radicular, atividade enzimática, expressão gênica. Ethylene and hydrogen peroxide in the aerenchyma formation in maize tolerant to intermittent floodingAbstract -The objective of this work was to evaluate the role of ethylene and hydrogen peroxide (H 2 O 2 ) in the aerenchyma formation in genetic selection cycles of the maize cultivar BRS 4154, under flooding. Plants from cycles C1 and C18 were flooded for 7 days, with roots collected at 0 (control, no flooding), 1, and 7 days. The following were evaluated: gene expression of the enzymes ACC synthase (ACS), ACC oxidase (ACO), superoxide dismutase (SOD), and ascorbate peroxidase (APX); ethylene production and H 2 O 2 content; enzymatic activity of ACO; and aerenchyma proportion in the cortex. There was no expression of ACS and ACO. ACO activity and ethylene production varied. SOD expression was higher in C1 plants and that of APX in C18 plants, with reduction at 7 days. H 2 O 2 content did not differ between treatments. The proportion of aerenchyma increased with time, being higher in C18 plants and related to the aerenchyma formation rate. The flooding time and the tolerance level of the selection cycle influence ethylene production. The expression of APX indicates greater H 2 O 2 production at the beginning of flooding.Index terms: Zea mays, root anatomy, enzyme activity, gene expression. IntroduçãoO alagamento do solo é umas das principais restrições à produção agrícola e afeta cerca de 10% da superfície terrestre (Patel et al., 2014), em razão da redução na concentração de gases no solo, o que resulta em hipoxia ou anoxia (Sairam et al., 2008).Em plantas tolerantes, uma das estratégias comuns é a formação de aerênquima, um tecido vegetal com alta proporção de espaços intercelulares (Evans, 2004), que facilita a difusão de gases entre os órgãos inundados e não inundados das plantas, o que ...

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Calcium‐Dependent Tolerant Response of Cell Wall in Maize Mesocotyl Under Flooding Stress

Cited by 14 publications

References 29 publications

Growth, photosynthetic performance and antioxidative response of 'Hass' and 'Fuerte' avocado (Persea americana Mill.) plants grown under high soil moisture

Growth, photosynthetic performance and antioxidative response of 'Hass' and 'Fuerte' avocado (Persea americana Mill.) plants grown under high soil moisture

Expression profiling of Chrysanthemum crassum under salinity stress and the initiation of morphological changes

Etileno e peróxido de hidrogênio na formação de aerênquima em milho tolerante a alagamento intermitente

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