Effects of drought stress and rewatering on antioxidant systems and relative water content in different growth stages of maize (<i>Zea mays</i>L.) hybrids

Ghahfarokhi, Maryam Goodarzian; Mansurifar, S.; Taghizadeh‐Mehrjardi, Ruhollah; Saeidi, Mohsen; Jamshidi, Amir Mohammad; Ghasemi, Elahe

doi:10.1080/03650340.2014.943198

Cited by 39 publications

(10 citation statements)

References 41 publications

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“…The decrease in chlorophyll content in maize under water deficit is well evidenced. Saglam et al (2014) and Ghahfarokhi et al (2015) observed in the drought experiment a decrease in chloroplastidic pigments in a susceptible maize cultivar and an increase in tolerant genotypes. In studies with the application of chitosan and a chitosan oligomer in leaves of coffee plants, Dzung et al (2011) concluded that the application of these polymers increased the contents of chlorophyll a, b and carotenoids in the leaves.…”

Section: Discussionmentioning

confidence: 93%

Action of N-Succinyl and N,O-Dicarboxymethyl Chitosan Derivatives on Chlorophyll Photosynthesis and Fluorescence in Drought-Sensitive Maize

Reis

Magalhães²,

Almeida

et al. 2018

J Plant Growth Regul

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Chitosan induces plant tolerance to various abiotic stresses, including water deficit. However, its use may be limited, due to its constitution and low solubility in water. Thus, chemical modifications were proposed in this study with the objective of potentializing its biological effects in maize plants. The derivatives were semi-synthesized (N-succinyl and N,O-dicarboxymethyl) and, together with chitosan, they were applied, via the leaf, in a drought-sensitive maize hybrid (BRS1030) under pre-flowering water deficit. The water deficit was maintained for 15 days and the analyses were performed at the beginning and end of stress, and also in rehydration. Leaf water potential, gas exchange, chlorophyll fluorescence, and content of chloroplastidic pigments were evaluated. The use of the derivatives modulated photosynthesis parameters, affecting the involved mechanisms, such as stomatal activity, water use efficiency and photosystem II activity. Chlorophyll fluorescence indicated that the antenna complex was damaged by the water deficit condition, with a decrease in the energy flux in the electron transport chain and in the photochemical phase of photosynthesis. However, the spraying of chitosan derivatives induced tolerance to water deficit, suggesting that chitosan derivatives are more bioavailable to plants. Water stress decreases pigment content, but both the application of chitosan and derivatives increased these contents. It is concluded that chitosan derivatives improved the photosynthetic parameters in maize susceptible to drought, inducing tolerance to this stress, and the possible reasons and consequences are discussed.

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Section: Discussionmentioning

confidence: 93%

Action of N-Succinyl and N,O-Dicarboxymethyl Chitosan Derivatives on Chlorophyll Photosynthesis and Fluorescence in Drought-Sensitive Maize

Reis

Magalhães²,

Almeida

et al. 2018

J Plant Growth Regul

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“…The varieties were evaluated for RWC, EL and MDA (Figure 3). The reduction of RWC is common in plants subjected to drought stress, as observed by Xiong et al (2012) and Goodarzian Ghahfarokhi et al (2015). However, tolerant varieties had a tendency to present a small reduction of this parameter, as observed for Catetão.…”

Section: Discussionmentioning

confidence: 75%

Characteristics of the root system in two Brazilian upland rice varieties which exhibit contrasting behavior towards drought tolerance

Ferreira

Oliveira

Arruda³

et al. 2020

Semina: Ciênc. Agrár.

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“…Plants control the level of ROS by several antioxidant enzymes such as pirogalol peroxidase (PG-POD) and superoxide dismutase (SOD) which are responsible for scavenging accumulated ROS. This ability to control the level of ROS is important in drought tolerance in arid and semiarid regions (Ghahfarokhi et al, 2015). Water stress withought SNP did not affect the activity of SOD nor did the application of SNP under water stress (Figure 1c).…”

Section: Resultsmentioning

confidence: 98%

“…Plant cell evolved an antioxidant system composed of nonenzymatic and enzymatic components that play a critical role in neutralizing the free radicals which can affect the cellular stability. The ability to maintain a high antioxidant system activity under water stress depends on plant species, stress intensity and duration (DaCosta & Huang, 2007), with the high antioxidant enzyme activity levels been positively related to drought resistance (Ghahfarokhi et al, 2015;Sairam & Srivastava, 2001).…”

Section: Introductionmentioning

confidence: 99%

Nitric oxide reduces oxidative damage induced by water stress in sunflower plants

et al. 2015

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Drought is one of the main environmental constraints that can reduce plant yield. Nitric oxide (NO) is a signal molecule involved in plant responses to several environmental stresses. The objective of this study was to investigate the cytoprotective effect of a single foliar application of 0, 1, 10 or 100 µM of the NO donor sodium nitroprusside (SNP) in sunflower plants under water stress. Water stressed plants treated with 1μM SNP showed an increase in the relative water content compared with 0 μM SNP. Drought reduced the shoot dry weight but SNP applications did not result in alleviation of drought effects. Neither drought nor water stress plus SNP applications altered the content of photosynthetic pigments. Stomatal conductance was reduced by drought and this reduction was accompanied by a significant reduction in intercellular CO 2 concentration and photosynthesis. Treatment with SNP did not reverse the effect of drought on the gas exchange characteristics. Drought increased the level of malondialdehyde (MDA) and proline and reduced pirogalol peroxidase (PG-POD) activity, but did not affect the activity of superoxide dismutase (SOD). When the water stressed plants were treated with 10 μM SNP, the activity of PG-POD and the content of proline were increased and the level of MDA was decreased. The results show that the adverse effects of water stress on sunflower plants are dependent on the external NO concentration. The action of NO may be explained by its ability to increase the levels of antioxidant compounds and the activity of ROS-scavenging enzymes.

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Effects of drought stress and rewatering on antioxidant systems and relative water content in different growth stages of maize (Zea maysL.) hybrids

Cited by 39 publications

References 41 publications

Action of N-Succinyl and N,O-Dicarboxymethyl Chitosan Derivatives on Chlorophyll Photosynthesis and Fluorescence in Drought-Sensitive Maize

Action of N-Succinyl and N,O-Dicarboxymethyl Chitosan Derivatives on Chlorophyll Photosynthesis and Fluorescence in Drought-Sensitive Maize

Characteristics of the root system in two Brazilian upland rice varieties which exhibit contrasting behavior towards drought tolerance

Nitric oxide reduces oxidative damage induced by water stress in sunflower plants

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