Efeito de alagamento e de aplicação de fitorreguladores na brotação de Guazuma ulmifolia (Malvaceae) e de Sesbania virgata (Fabaceae)

Cortezi, Daniele Giancristofaro; Colli, Sandra

doi:10.1590/s0100-84042011000300015

Cited by 6 publications

(6 citation statements)

References 20 publications

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“…When maize crop is subjected to waterlogging, stomatal closure and declines in photosynthetic rates are common responses 11,12 . Excessive soil moisture limits plant growth by altering morphological, physiological, and anatomical mechanisms 13–15 . Waterlogging decreases superoxide dismutase (SOD), peroxidase (POD), ascorbate peroxidase (APX) and catalase (CAT) enzyme activities, causing damage to the protective enzyme system.…”

Section: Introductionmentioning

confidence: 99%

“…The structure of mesophyll cell and chloroplast morphology is an essential component of photosynthesis and plays a key role in determining photosynthetic assimilation capacity 21 . The morphology and ultrastructure of chloroplasts directly affects photosynthesis and significantly reduces the dry matter accumulation and yield of maize crop 1,2,6–8,13,15–17,19–22 .…”

Section: Introductionmentioning

confidence: 99%

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γ-Aminobutyric Acid Promotes Chloroplast Ultrastructure, Antioxidant Capacity, and Growth of Waterlogged Maize Seedlings

Salah

Zhan

Cao

et al. 2019

Sci Rep

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γ-aminobutyric acid (GABA) is a small signaling molecule that accumulates rapidly in plants exposed to various stresses; however, it has not been applied in regulating waterlogging tolerance in maize seedlings. Here, the effect of exogenous application of GABA in the determined optimal concentration was performed on seedlings of two maize cultivars under waterlogging treatments initiated at 3-leaf (V3) and 5-leaf stages (V5) in repeated experiments in 2016 and 2017. Chloroplast ultrastructure, photosynthesis, antioxidant capacity, and reactive oxygen species (ROS) production in the leaves were examined and compared with the corresponding values under normal soil water treatment (CK) and waterlogging treatment (WL). Compared with WL treatment, application of GABA significantly increased aboveground and root dry matter by 19.0% and 61.0%, promoted photosynthetic rate and chlorophyll content by 19.8% and 36.0%, increased the number of grana per chloroplast by 36.0%, fortified antioxidants (SOD, POD, CAT, GR, APX, VC) activities by 14.7–42.7%, and reduced the content of MDA, H2O2, and O2− by 30.5%, 32.5%, and 21.8%, respectively (p < 0.05). Collectively, GABA application was shown to promote the growth of maize seedlings under waterlogging, by down regulating ROIs-producing enzymes, activating antioxidant defense systems, and improving chloroplast ultrastructure and photosynthetic traits.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

γ-Aminobutyric Acid Promotes Chloroplast Ultrastructure, Antioxidant Capacity, and Growth of Waterlogged Maize Seedlings

Salah

Zhan

Cao

et al. 2019

Sci Rep

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“…Waterlogging promotes typical alterations in the biochemistry, physiology, anatomy, and morphology of plants (Cortezi and Colli 2011;Alves et al 2012). The main problem of waterlogged soil is the limited availability of oxygen to root systems, being this abiotic stress frequently showed in Amazon region.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant enzymes efficiently control leaf and root cell damage in young Euterpe oleracea plants exposed to waterlogging

Pereira

Silva

Filho

et al. 2015

Ind J Plant Physiol.

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Euterpe oleracea (Mart.), an Amazonian palm, is of economic importance due to the production of energy drinks. Plants exposed to waterlogging are prone to damage at the cellular level and cause irreversible metabolic dysfunctions leading to cell death. This study was aimed to study cell damages and to investigate enzyme activities related to antioxidant system in this specie. The experimental design was in factorial randomized with two water conditions (waterlogging and control) and five evaluation times (0, 6, 12, 18, and 24 days). The parameters measured were electrolyte leakage (EL), contents of hydrogen peroxide (H 2 O 2 ), malondialdehyde (MDA) and glutathione (GSH), and enzymatic activities of catalase (CAT), ascorbate peroxidase (APX) and peroxidase (POX) in leaf and root tissues. Waterlogging did not promote significant modifications in EL, MDA and H 2 O 2 in both the tissues evaluated, and a minor alteration in GSH was observed only in the roots. Significant increases in the activity of CAT, APX and POX were observed in leaf and roots, at early stages. It can thus be concluded that CAT, APX and POX were efficient in controlling EL and MDA in leaf and root of E. oleracea plants under waterlogging.

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“…Even brief periods of excess moisture result in considerable reductions in seed yield [7]. Waterlogging causes a variety of morphological, physiological, and biochemical alterations that adversely affect plant growth, development, and production [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Response of Diverse Sesame Genotypes to Waterlogging Durations at Different Plant Growth Stages

Habibullah

Sarkar

Islam

et al. 2021

Plants

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Sesame is sensitive to waterlogging, and its growth is devastatingly impacted under excess moisture conditions. Thus, waterlogging tolerance is crucial to alleviate yield constraints, particularly under expected climate change. In this study, 119 diverse sesame genotypes were screened for their tolerance to 12, 24, 48, and 72 h of waterlogging relative to non-waterlogged conditions. All plants died under 72 h of waterlogging, while 13.45%, 31.93%, and 45.38% of genotypes survived at 48, 24, and 12 h, respectively. Based on the seedling parameters and waterlogging tolerance coefficients, genotypes BD-7008 and BD-6985 exhibited the highest tolerance to waterlogging, while BD-6996 and JP-01811 were the most sensitive ones. The responses of these four genotypes to waterlogged conditions were assessed at different plant growth stages—30, 40, and 50 days after sowing (DAS)—versus normal conditions. Waterlogging, particularly when it occurred within 30 DAS, destructively affected the physiological and morphological characteristics, which was reflected in the growth and yield attributes. Genotype BD-7008, followed by BD-6985, exhibited the highest chlorophyll and proline contents as well as enzymatic antioxidant activities, including superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT). These biochemical and physiological adjustments ameliorated the adverse effects of waterlogging, resulting in higher yields for both genotypes. Conversely, JP-01811 presented the lowest chlorophyll and proline contents as well as enzymatic antioxidant activities, resulting in the poorest growth and seed yield.

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Efeito de alagamento e de aplicação de fitorreguladores na brotação de Guazuma ulmifolia (Malvaceae) e de Sesbania virgata (Fabaceae)

Cited by 6 publications

References 20 publications

γ-Aminobutyric Acid Promotes Chloroplast Ultrastructure, Antioxidant Capacity, and Growth of Waterlogged Maize Seedlings

γ-Aminobutyric Acid Promotes Chloroplast Ultrastructure, Antioxidant Capacity, and Growth of Waterlogged Maize Seedlings

Antioxidant enzymes efficiently control leaf and root cell damage in young Euterpe oleracea plants exposed to waterlogging

Assessing the Response of Diverse Sesame Genotypes to Waterlogging Durations at Different Plant Growth Stages

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