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

Pires, Marinês Ferreira; Castro, Evaristo Mauro de; Magalhães, P. C.; Neta, Izabel Costa Silva; Monteiro, Aline Gomes Dias Pinto

doi:10.1590/s0100-204x2015000900006

Cited by 5 publications

(3 citation statements)

References 25 publications

(20 reference statements)

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“…Aerenchyma development is essential for plant survival under flooded conditions and occurs in tolerant crop species such as maize (Yamauchi et al, 2013). Aerenchyma development is induced by environmental stresses that stimulate ethylene synthesis, which in turn regulates the production of ROS, leading to programmed cell death (Geisler‐Lee et al, 2010; Pires et al, 2015). We do not challenge this formation mechanism but instead add important information concerning the direct role of H 2 O 2 in tissue formation and the fact that heavy metals or other factors that generate H 2 O 2 stimulate the formation of root aerenchyma while inhibitory molecules reduce aerenchyma formation.…”

Section: Discussionmentioning

confidence: 99%

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The role of reactive oxygen species and nitric oxide in the formation of root cortical aerenchyma under cadmium contamination

Díaz

Cruz

Duarte

et al. 2021

Physiologia Plantarum

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The present study aimed to evaluate root cortical aerenchyma formation in response to Cd‐driven hydrogen peroxide (H2O2) production and the role of nitric oxide (NO) in the alleviation of Cd oxidative stress in maize roots and its effects on aerenchyma development. Maize plants were subjected to continuous flooding for 30 days, and the following treatments were applied weekly: Cd(NO3)2 at 0, 10, and 50 μM and Na2[Fe(CN)5NO]·2H2O (an NO donor) at 0.5, 0.1, and 0.2 μM. The root biometrics; oxidative stress indicators H2O2 and malondialdehyde (MDA); and activities of catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX) were analyzed. The root dry and fresh masses decreased at higher concentrations of NO and Cd. H2O2 also decreased at higher NO concentrations; however, MDA increased only at higher Cd levels. SOD activity decreased at higher concentrations of NO, but CAT activity increased. Aerenchyma development decreased in response to NO. Consequently, NO acts as an antagonist to Cd, decreasing the concentration of H2O2 by reducing SOD activity and increasing CAT activity. Although H2O2 is directly linked to aerenchyma formation, increased H2O2 concentrations are necessary for root cortical aerenchyma development.

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Section: Discussionmentioning

confidence: 99%

“…The formation of lysigenous aerenchyma is stimulated by hypoxia through the production of ethylene, which induces programmed cell death (Pires et al, 2015; Yamauchi et al, 2017). However, the decrease in oxygen induces the formation of reactive oxygen species (ROS) such as hydrogen peroxide (H 2 O 2 ; Rodríguez‐González et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

The role of reactive oxygen species and nitric oxide in the formation of root cortical aerenchyma under cadmium contamination

Díaz

Cruz

Duarte

et al. 2021

Physiologia Plantarum

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“…For comparison of means, Tukey's test was employed, at 5% probability of error (p<0.05). Low oxygenation rates caused by soil waterlogging affects plant growth and development in several ways and different parts, depending on the species; in adapted species, aerenchymas develop (Pires et al, 2015), which affects anaerobic respiration and photosynthetic and nutritional assimilation metabolism (Batista et al, 2008). Nevertheless, hypoxia produces toxic substances such as ethanol and lactate, which are generated in response to changes to the respiratory metabolism of roots (Kolb and Loly, 2009).…”

Section: Methodsmentioning

confidence: 99%

Morphological and Phenological Responses of Eragrostis plana Nees and Eragrostis pilosa (L.) P. Beauv. Plants Subjected to Different Soil Moisture Conditions

et al. 2019

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Experiments were run in a greenhouse where samples of Eragrostis pilosa and Eragrostis plana, species that infest rice crops, were subjected to three soil moisture conditions (50% of soil water retention capacity (WRC), 100% of WRC, 10 cm water depth), simulating three different environments (upland, lowland and irrigated rice farm, respectively), with the aim of studying how these conditions affect the morphology and vegetative cycle of these plants, by means of development and growth assessments. Results show that each species responds differently when subjected to varying amounts of water in the soil. Soaking the soil with 10 cm of water was the treatment that most negatively influenced the development of E. plana plants, reducing the formation of panicles per plant, as well as the aerial part dry mass. The responses of E. pilosa plants to the waterlogged environment manifested as reductions in tillering parameters, number of panicles per plant, root and aerial part dry mass, changes in flag leaf formation, and vegetative cycle increases, which allows inferring that these plants are more sensitive to hypotoxic environments. Thus, the water depth treatment is possibly what caused negative effects on the development of the study plants, which indicates that water management in irrigated rice farming is of uttermost importance for management of invasive plants.

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Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition

et al. 2018

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Root cortical aerenchyma (RCA) is suggested to reduce metabolic cost for root growth, but it might lower water uptake by plants. The objective of this work was to evaluate the effects of drought and phosphorus on the RCA development along the root axis and to elucidate its role in water stress tolerance of two maize genotypes. Plants of drought-tolerant DKB390 and drought-sensitive BRS1010 genotypes were grown in Vermiculite at field capacity of 100, 75, 50, and 25 % and supplied with 0.1, 0.4, and 0.8 mM phosphorus. Growth parameters, RCA, and plant P content were evaluated for all plants. Higher RCA development was observed in DKB390 than in BRS1010. Drought reduced the percentage of RCA in the root-hair zone of both genotypes but increased its development in the root maturation zone. Phosphorus limitation enhanced RCA development only in the DKB390. Under drought stress, DKB390 showed resilient growth whereas growth was inhibited in BRS1010. Higher root P content was related to its higher supply. Therefore, RCA formation was induced either by drought or by phosphorus limitation, while no interaction was evident. The RCA development varied along the root axis in order to balance water and phosphorus uptake and the drought response was genotype dependent.

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

Cited by 5 publications

References 25 publications

The role of reactive oxygen species and nitric oxide in the formation of root cortical aerenchyma under cadmium contamination

The role of reactive oxygen species and nitric oxide in the formation of root cortical aerenchyma under cadmium contamination

Morphological and Phenological Responses of Eragrostis plana Nees and Eragrostis pilosa (L.) P. Beauv. Plants Subjected to Different Soil Moisture Conditions

Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition

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