Fontes e níveis de salinidade na germinação de sementes de Crotalaria juncea L.

Nunes, Anísio da Silva; Lourenção, André Luis Faleiros; Pezarico, Carmen Regina; Scalon, Silvana de Paula Quintão; Gonçalves, Manoel Carlos

doi:10.1590/s1413-70542009000300013

Cited by 14 publications

(16 citation statements)

References 10 publications

(6 reference statements)

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“…Besides this, the authors concluded that the deleterious effects on osmotic potential were more severe in the following order, respectively: KCl, CaCl 2 and NaCl on germination; KCl, NaCl and CaCl 2 on initial growth; and NaCl, KCl and CaCl 2 on phytotoxicity. Botelho & Perez (2001), in a similar study to that of Nunes et al (2009), found the same results for horsebush (Peltophorum dubium), where the negative effects of reduced osmotic potential increased with higher concentrations of salts.…”

Section: Discussionsupporting

confidence: 57%

“…Nunes et al (2009), evaluating the toxicity of KCl, NaCl and CaCl 2 on the germination and growth of Crotalaria juncea, found that the increased concentration of those salts, expressed by the reduction of the osmotic potential, impaired germination and initial growth. Besides this, the authors concluded that the deleterious effects on osmotic potential were more severe in the following order, respectively: KCl, CaCl 2 and NaCl on germination; KCl, NaCl and CaCl 2 on initial growth; and NaCl, KCl and CaCl 2 on phytotoxicity.…”

Section: Discussionmentioning

confidence: 99%

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Application of root growth endpoint in toxicity tests with lettuce (Lactuca sativa)

Campagna-Fernandes

Silva²,

Penha³

2016

EEC

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Ecotoxicological tests are an important tool to assess the toxicity of chemical substances and even the deleterious effects of adverse environmental conditions to different species. Ecotoxicological studies with land plants and animals are relatively recent compared to those with aquatic species, with few studies reported focusing on terrestrial species. The aim of the present study was to evaluate the sensitivity of root growth (Total Part; Radicle, Hypocotyl) in lettuce (Lactuca sativa) to sodium chloride (NaCl), by means of exposing the seeds to concentrations of 0, ). The effects on root growth were detected starting at a concentration of 1.0 g L -1 of NaCl and the radicle (Rad) was the most sensitive and reliable structure. Root growth was a more sensitive endpoint than germination, since the effects were detected at concentrations some 10 times lower. Besides this, the use of the radicle as an endpoint, proposed in the present study, should be intensified in ecotoxicological studies, since it provides satisfactory results at low cost and in a relatively short time frame.

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Section: Discussionsupporting

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Application of root growth endpoint in toxicity tests with lettuce (Lactuca sativa)

Campagna-Fernandes

Silva²,

Penha³

2016

EEC

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“…did not show a high threshold of tolerance to salt stress and can be considered a glycophyte with moderate tolerance to NaCl (Fanti and Perez, 2004). A reduction in the percentage of germination attributable to increased water salinity was also observed in various legumes (Deminicis et al, 2007;Nunes et al, 2009). Tolerances to osmotic and ionic stress induced by water restriction and salt excess, respectively, are complex and often interrelated, involving the interaction of multiple factors (Verslues et al, 2006).…”

Section: Resultsmentioning

confidence: 91%

Germinative metabolism of Caatinga forest species in biosaline agriculture

et al. 2014

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-The production of seeds and seedlings by these species is of utmost importance to prevent a loss of biodiversity of the Caatinga, a unique and exclusively Brazilian biome. Biosaline agriculture is conducted over a range of salinity levels in groundwater and/or in soils. The current study evaluated the application of biosaline agriculture to Anadenanthera macrocarpa, Myracrodruon urundeuva, Aspidosperma pyrifolium and Erythrina velutina by examining the germinative metabolism of seeds subjected to different electrical conductivities (ECs) of NaCl solutions and biosaline water. The seeds were germinated in biosaline water (4.94 dS.m -1) and in NaCl solutions with ECs of 0, 2, 4, 6, 8, 10, 12, 14, 16 and 18 dS.m -1 at 25 °C, 12-h photoperiod. The kinetic variables of germination were assessed, and the seeds and seedlings were assayed for reserve biomolecules, proline content and antioxidant enzyme activity. The seeds were highly tolerant to salinity, with germination-limiting ECs above 12 dS.m -1. Although high EC promoted alterations in seed metabolism that enabled salinity tolerance, seedling production was indicated with ECs no higher than 6 dS.m . These results demonstrated that Caatinga seedling production is viable through biosaline agriculture beucause the groundwater salinity of this region is within the tolerance levels of the seeds. . Embora, alta CE promova alterações no metabolismo sementes, permitindo tolerância à salinidade, a produção de mudas é indicada em CE inferior a 6 dS.m -1 . Assim, a produção de mudas da Caatinga é viável através da agricultura biossalina, pois as águas subterrâneas da região apresentam-se dentro deste nível.Termos de indexação: enzimas antioxidantes, germinação, mobilização de reserva, estresse salino.

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“…Among the treatments, the phytotoxicity sources induced different effects regarding to the size and appearance of sunn hemp seedlings (Nunes et al, 2009). The same effect was observed, regarding to the appearance of roots of L. lycopersicum.…”

Section: Resultsmentioning

confidence: 99%

Phytotoxicity of extracts of Myrciaria dubia (Kunth) McVaugh bioprocessed in vegetable crop sensitive to allelochemicals

Rita¹,

Pedro²,

Marcelo³

et al. 2017

Afr. J. Plant Sci.

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The present work is a contribution to the advancement of the scientific knowledge of vegetal species of the Amazon and training of professionals in the area of vegetal and related sciences in the use of alternative methods and techniques more coherent with the context of the socioeconomic and environmental reality of the region. This work aimed to evaluate the effect of extracts prepared from bioprocessed remaining (BR), seeds of fruit of Myrciaria dubia (caçari) from the northern Amazon, applied to biological assay with Lycopersicon lycopersicum (tomato) seeds. To obtain and classify the degree of phytotoxicity were utilized samples of control and different aqueous extracts, with and without treatment, assessing their physical and chemical quality via pH analysis, electrical conductivity and total of dissolved salts. Thereafter, monitoring of bioassay was held for five days in closed glass plate, with samples incubation at 25 ± 1°C in a dark environment. It was obtained preliminary knowledge about four extracts prepared from T1 and T2 in proportion to 1:10 and 1:100. The methodological process applied allowed the quick examination, up to 120 h, of the effect of the extracts on seed germination and root growth of tomato. Of the four extracts evaluated, those who were previously treated T2D1 and T2D2, regardless of the applied concentration, showed no phytotoxicity to the plant tested and classified according to Germination Index (GI) obtained, 90.2 and 96.6%. The results show an important information about the influence of treatment of the bioprocessed compounds on their chemical and physicochemical characteristics, which can alter their effects on the development of other plants. Therefore, there is possibility of availability of finished products and raw materials from the M. dubia seeds, since previously sterilized.

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Fontes e níveis de salinidade na germinação de sementes de Crotalaria juncea L.

Cited by 14 publications

References 10 publications

Application of root growth endpoint in toxicity tests with lettuce (Lactuca sativa)

Application of root growth endpoint in toxicity tests with lettuce (Lactuca sativa)

Germinative metabolism of Caatinga forest species in biosaline agriculture

Phytotoxicity of extracts of Myrciaria dubia (Kunth) McVaugh bioprocessed in vegetable crop sensitive to allelochemicals

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