EFEITOS DE GIBERELINAS, CITOCININAS E DO NITRATO DE POTÁSSIO, NO PROCESSO GERMINATIVO DE SEMENTES DE LIMOEIRO `CRAVO' (Citrus limonia OSBECK)

Leonel, Sarita; Rodrigues, João Domingos

doi:10.1590/s0103-90161999000100017

Cited by 2 publications

(1 citation statement)

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“…This result can also be due to the large quantity of potassium present in the vinasse samples, as hydric and saline stresses are correlated with the excess of soluble salts, reducing the potential of water in the soil and consequently, preventing the absorption of water by seeds in general [22]. According to Leonel and Rodrigues (1999) [23], when the levels of potassium nitrate were tested in citrus seeds, the results showed a toxic potential, inhibiting their germination. Studies conducted by Gazziero et al (1991) [24] also showed that potassium nitrate did not promote the germination of Sorghum halepense seeds.…”

Section: Discussionmentioning

confidence: 99%

Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the <i>Allium cepa</i> Test

Pedro-Escher¹,

Christofoletti²,

Ansoar-Rodríguez³

et al. 2016

JEP

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The search for fuels to replace petroleum consumption has caused an increase in the production of biofuels worldwide. The ethanol, which comes from sugarcane, is an energy resource with low polluting potential, but its production generates other environmental problems. On average, 10 to 15 liters of vinasse are generated while preparing each liter of ethanol. Vinasse is the final by-product of the biomass distillation, mainly for the production of ethanol, from different cultures such as sugarcane. Because excessive quantities of vinasse are produced, alternatives have been required for use, for example as fertilizer, in a process known as fertigation. These excessive amounts of vinasse applied in soils have generated adverse effects on soil properties and to the organisms. This study carried out the toxic, cytotoxic and genotoxic potential of sugarcane vinasse obtained from two different harvests (Samples I and II), using the Allium cepa organism test. A. cepa seeds were exposed to raw vinasse (RV) and diluted in different concentrations: control soil + raw vinasse (SV); vinasse diluted in water at 50% + control soil (V 50%); vinasse diluted in water at 25% + control soil (V 25%); vinasse diluted in water at 12.5% + control soil (V 12.5%). The chemical characterization of vinasse samples showed a low pH and high concentration of potassium. The results demonstrate that the two RV samples tested are toxic, since no seeds germination was observed. The cytotoxic potential was observed in the sample II of SV and V (50%). All groups evaluated in samples I and II, induced chromosomal alterations, statistically significant compared with negative control. An increase in frequency of micronuclei in meristematic cells was observed in the SV (Sample I) and all groups evaluated in samples II. Based on the results it is concluded that the genetic material of the test-system was damaged when exposed to sugarcane vinasse, * Corresponding author. J. Pedro-Escher et al. 603suggesting that one should be very careful in the use of this waste that has been used sometimes indiscriminately in soils.

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Section: Discussionmentioning

confidence: 99%

Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the <i>Allium cepa</i> Test

Pedro-Escher¹,

Christofoletti²,

Ansoar-Rodríguez³

et al. 2016

JEP

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Biometria de frutos e sementes e germinação de Magonia pubescens ST.Hil (sapindaceae)

Macedo

Scalon

Sari

et al. 2009

Rev. bras. sementes

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Magonia pubescens é uma espécie arbórea típica do cerrado com grande potencial de utilização tanto pelas suas características econômicas quanto ecológicas. O objetivo do trabalho foi o de avaliar as características biométricas de frutos e sementes dessa espécie e seu potencial germinativo. Para as avaliações de biometria, foram utilizados 28 frutos e 293 sementes provenientes de matrizes localizadas em Aquidauana - MS. O estudo foi realizado no laboratório de Fisiologia Vegetal e em viveiro pertencentes à Faculdade de Ciências Agrárias (FCA) da Universidade Federal da Grande Dourados (UFGD). Os frutos apresentam grande variação no tamanho, peso e no número de sementes, tendo em média 6,66 cm de comprimento; 8,14 cm de diâmetro; 248,21g de massa fresca e 13,14 sementes As sementes apresentam pequena variação no tamanho quando comparadas aos frutos, tendo em média 4,81 cm de comprimento; 8,44 cm de largura e 3,5g de massa fresca. Para o estudo da germinação as sementes receberam os seguintes tratamentos: 1) KNO3 1% 24h; 2) KNO3 2% 24h; 3) GA 500 mg. L -1 24h; 4) GA 250 mg. L -1 24h; 5) Água 24h; 6) Controle. O experimento foi conduzido em delineamento inteiramente casualizado com 6 tratamentos e 3 repetições de 30 sementes. O tratamento de imersão em água por 24 horas proporcionou os maiores valores de emergência (80%). As giberelinas promoveram os maiores valores de altura da parte aérea (média 14,7cm). Os maiores valores de massa fresca e seca da parte aérea foram observadas em plântulas originadas de sementes tratadas com GA 500 mg L-1 24h (1,26 e 0,24g respectivamente). Os maiores valores de massa fresca e massa seca dos cotilédones foram observados em plântulas oriundas de sementes tratadas com KNO3 1% 24h (7,63 e 1,81g respectivamente). Recomenda-se a pré-embebição das sementes em água ou GA por 24 horas para obtenção de maior número de plântulas.

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EFEITOS DE GIBERELINAS, CITOCININAS E DO NITRATO DE POTÁSSIO, NO PROCESSO GERMINATIVO DE SEMENTES DE LIMOEIRO `CRAVO' (Citrus limonia OSBECK)

Cited by 2 publications

References 4 publications

Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the <i>Allium cepa</i> Test

Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the <i>Allium cepa</i> Test

Biometria de frutos e sementes e germinação de Magonia pubescens ST.Hil (sapindaceae)

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EFEITOS DE GIBERELINAS, CITOCININAS E DO NITRATO DE POTÁSSIO, NO PROCESSO GERMINATIVO DE SEMENTES DE LIMOEIRO `CRAVO' (Citrus limonia OSBECK)

Cited by 2 publications

References 4 publications

Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the &lt;i&gt;Allium cepa&lt;/i&gt; Test

Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the &lt;i&gt;Allium cepa&lt;/i&gt; Test

Biometria de frutos e sementes e germinação de Magonia pubescens ST.Hil (sapindaceae)

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Product

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Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the <i>Allium cepa</i> Test

Sugarcane Vinasse, a Residue of Ethanol Industry: Toxic, Cytotoxic and Genotoxic Potential Using the <i>Allium cepa</i> Test