Brassinosteroids Positively Modulate Growth: Physiological, Biochemical and Anatomical Evidence Using Two Tomato Genotypes Contrasting to Dwarfism

Maia, Camille Ferreira; Silva, Breno Ricardo Serrão da; Lobato, Allan Klynger da Silva

doi:10.1007/s00344-018-9802-2

Cited by 34 publications

(20 citation statements)

References 77 publications

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“…Reductions in RET and RCD promoted by the high Zn supply (500 μM ZnSO4) were verified by Bazihizina et al (2014) after studying the impacts of this metal on the cellular structure of Nicotiana tabacum roots. Maia et al (2018) observed in a study with Solanum lycopersicum plants that a spray with 100 nM EBR promoted increases in RET (9%), RDT (14%), RCD (12%), VCD (7%) and RMD (17%). Plants treated with low and high concentrations of Zn and sprayed with 100 nM EBR presented increases in the contents of macronutrients (K, P, and Mg) and micronutrients (Fe, Cu and Mo).…”

Section: Discussionmentioning

confidence: 91%

“…The 0 and 100 nM EBR (Sigma-Aldrich, USA) solutions were prepared in agreement with Ahammed et al (2013). Based on preliminary studies and literature available (Lima and Lobato 2017;Maia et al 2018;Pereira et al 2019;Oliveira et al 2019), the EBR is more efficient in plants pretreated (10th day). On the other hand, Zn was applied only on 20th day after experimental implementation due to need of leaf area and plant tissue sufficient to make all analyses involved in this research.…”

Section: -Epibrassinolide (Ebr) Preparation and Applicationmentioning

confidence: 99%

“…Zn is the second most common micronutrient required by plants; however, deficiencies and excesses of Zn promote deleterious effects on soybean plants. Interestingly, EBR can be a possible solution to mitigate the damage caused by deficiencies and excesses of Zn in plants because this steroid presents a spectrum of actions linked to increments in nutrient content (Lima et al 2018), reactive oxygen species scavenging (Oliveira et al 2019) and stimulation of biomass (Maia et al 2018). Therefore, the aim of this research was to determine whether EBR can mitigate oxidative stress in soybean plants subjected to different Zn supplies and to evaluate its possible repercussions on anatomical, nutritional, biochemical, physiological and morphological behaviours.…”

Section: Introductionmentioning

confidence: 99%

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24-Epibrassinolide Improves Root Anatomy and Antioxidant Enzymes in Soybean Plants Subjected to Zinc Stress

Santos

Silva

Pedron

et al. 2019

J Soil Sci Plant Nutr

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The aim of this research was to determine whether 24-epibrassinolide can mitigate oxidative stress in soybean plants subjected to different zinc levels; to examine this, we evaluated the possible repercussions on anatomical, nutritional, biochemical, physiological and morphological behaviours. The experiment followed a completely randomized factorial design with two concentrations of 24-epibrassinolide (0 and 100 nM EBR, described as-EBR and + EBR, respectively) and three zinc supplies (0.2, 20 and 2000 μM Zn, described as low, control and a high supply of Zn). In general, low and high zinc supplies produced deleterious effects. However, plants exposed to high zinc +100 nM EBR presented increases of 25%, 7%, 9% 29% and 69% for root epidermis, root endodermis, root cortex, vascular cylinder and metaxylem, respectively, when compared to the same treatment without the steroid. The steroid spray alleviated the impact produced by zinc stress on nutritional status, and these results were intrinsically linked to incremental changes in root structure, mainly vascular cylinder and metaxylem. Antioxidant enzymes play crucial roles in the photosynthetic machinery of plants treated with 24-epibrassinolide and stressed by high and low zinc supply, modulating reactive oxygen species scavenging and protecting the chloroplast membranes, with clear positive repercussions on photosystem II efficiency and photosynthetic pigments. The stimulation induced by this steroid on gas exchange can be explained by the favourable conditions detected in stomatal performance and leaf anatomy, thus enhancing the diffusion of carbon dioxide.

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Section: Discussionmentioning

confidence: 91%

Section: -Epibrassinolide (Ebr) Preparation and Applicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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24-Epibrassinolide Improves Root Anatomy and Antioxidant Enzymes in Soybean Plants Subjected to Zinc Stress

Santos

Silva

Pedron

et al. 2019

J Soil Sci Plant Nutr

Self Cite

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“…Exposure to Pb accelerated the ROS production, including H 2 O 2 , hence unbalancing the cellular redox status in A. obliquus. ROS react with cellular components (lipids, nucleic acids, proteins, and pigments) to cause lipid peroxidation, enzyme inactivation, and membrane damage (Ahmad 2016;Maia et al 2018). MDA level is used as an index of lipid peroxidation because it is an indicator of free radical formation in the tissues exposed to adverse environmental conditions (Cuypers et al 2016).…”

Section: Discussionmentioning

confidence: 99%

24-Epibrassinolide modulates primary metabolites, antioxidants, and phytochelatins in Acutodesmus obliquus exposed to lead stress

Talarek-Karwel

Bajguz

Piotrowska‐Niczyporuk

2019

J Appl Phycol

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Aquatic organisms are exposed to many stressors, e.g., heavy metals. Brassinosteroids, a plant hormone group, can effectively stimulate plants to defend against the negative impact of a heavy metal. The present study was conducted with an aim to find out the influence of 24-epibrassinolide (EBL) on Acutodesmus obliquus treated with 0.01 and 500 μM of lead (Pb) ions during 7 days of cultivation. Pb has a toxic effect on algal cultures because it limits both the growth and development and induces oxidative stress. Simultaneously, 1 μM EBL was involved in protecting algal cells against the toxic effect of Pb. Despite the presence of Pb, EBL significantly increased the number of algal cells and their metabolite content (e.g., proteins, monosaccharides, chlorophylls, carotenes, and xanthophylls). Cultures treated concurrently with EBL and Pb were characterized by a reduction in their content of endogenous Pb, H 2 O 2 , and malondialdehyde. Also, EBL increased the activity of catalase, ascorbate peroxidase, superoxide dismutase, glutathione reductase, and the content of ascorbate and glutathione. EBL increased the phytochelatin synthase activity, thereby enhancing the production of phytochelatins accountable for both binding and detoxification of Pb. These results indicate the influence of EBL on the inhibitory effect of Pb in A. obliquus. These findings help to clarify the role of BRs in the algal adaptation to the prevailing stressful conditions.

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“…All specimens were fixed in 70% formaldehyde acetic acid for 24 h and dehydrated in an increasing ethanol series. Transverse 12-µm-thick sections were obtained with a rotating microtome, stained with Safranin and Astra Blue, and mounted on paraffin (Maia et al, 2018). The slides were observed under a microscope (Pannoramic DESK, Hungary) and photomicrographed.…”

Section: Histological Parametersmentioning

confidence: 99%

Brassinosteroids Promote Parenchyma Cell and Secondary Xylem Development in Sugar Beet (Beta vulgaris L.) Root

Wang

Sun

et al. 2020

Preprint

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Increasing crop yield has always been an important goal in agriculture. Brassinosteroids (BRs) are growth-promoting steroid hormones with vital roles in many root developmental processes. Sugar beet (Beta vulgaris L.) is a root crop with a tertiary root structure. The differentiation of vascular bundles and division of cambial cells increases root diameter. However, little is known about how BRs regulate the transverse growth of beetroot. Therefore, sugar beet with eight leaves was grown in medium containing epibrassinolide or brassinazole, an inhibitor of brassinosteroid biosynthesis. BRs increased the spacing between the cambial rings by increasing the size of parenchyma cells between the rings and ultimately increasing root diameter. BRs also promoted secondary xylem differentiation. These findings indicate that brassinosteroids function in transverse development in beetroot.

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Brassinosteroids Positively Modulate Growth: Physiological, Biochemical and Anatomical Evidence Using Two Tomato Genotypes Contrasting to Dwarfism

Cited by 34 publications

References 77 publications

24-Epibrassinolide Improves Root Anatomy and Antioxidant Enzymes in Soybean Plants Subjected to Zinc Stress

24-Epibrassinolide Improves Root Anatomy and Antioxidant Enzymes in Soybean Plants Subjected to Zinc Stress

24-Epibrassinolide modulates primary metabolites, antioxidants, and phytochelatins in Acutodesmus obliquus exposed to lead stress

Brassinosteroids Promote Parenchyma Cell and Secondary Xylem Development in Sugar Beet (Beta vulgaris L.) Root

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