scholarly journals Correlation between heavy metal ions (copper, zinc, lead) concentrations and root length of Allium cepa L. in polluted river water

2005 ◽  
Vol 48 (spe) ◽  
pp. 191-196 ◽  
Author(s):  
Soraya Moreno Palacio ◽  
Fernando Rodolfo Espinoza-Quiñones ◽  
Raquel Manozzo Galante ◽  
Dilcemara Cristina Zenatti ◽  
Araceli Aparecida Seolatto ◽  
...  
Keyword(s):  
Root Growth ◽  
River Water ◽  
Allium Cepa ◽  
Heavy Metal Ions ◽  
Polluted River ◽  
Allium Cepa L ◽  
Copper Zinc ◽  
The Common ◽  
Concentration Levels ◽  
Common Onion

The present work was performed using the common onion (Allium cepa L.) as a bioindicator of toxicity of heavy metals in river water. The test waters were collected at two sampling sites: at the beginning and the end of the Toledo River. The bulbs of A. cepa L. were grown in test water with nine concentration levels of copper, zinc and lead from 0.1 to 50 ppm. In the laboratory, the influence of these test liquids on the root growth was examined during five days. For test liquids containing below 0.03-ppm dissolved Cu the root growth was reduced by 40% However, the same reduction occurred for 1-ppm dissolved Zn. For dissolved Pb, results reveal toxicity above 0.1 and 0.6 ppm at the beginning and the end of the Toledo river water, respectively.

scholarly journals Effect of selected biostimulants on the yield and quality of the common onion (Allium cepa L.)

2019 ◽  
Vol 26 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Emilia Mikulewicz ◽  
Joanna Majkowska-Gadomska ◽  
Krzysztof Jadwisieńczak ◽  
Anna Francke
Keyword(s):  
Allium Cepa ◽  
Yield And Quality ◽  
Allium Cepa L ◽  
The Common ◽  
Common Onion

Gibberellic acid as a gametocide for the common onion (Allium cepa L.)

Euphytica ◽  
1973 ◽  
Vol 22 (2) ◽  
pp. 239-243 ◽  
Author(s):  
Q. P. Van der Meer ◽  
J. L. Van Bennekom
Keyword(s):  
Gibberellic Acid ◽  
Allium Cepa ◽  
Allium Cepa L ◽  
The Common ◽  
Common Onion

Gibberellic acid as a gametocide for the common onion (Allium cepa L.). II. The effect of GA 4/7

Euphytica ◽  
1976 ◽  
Vol 25 (1) ◽  
pp. 293-296 ◽  
Author(s):  
Q. P. van der Meer ◽  
J. L. van Bennekom
Keyword(s):  
Gibberellic Acid ◽  
Allium Cepa ◽  
Allium Cepa L ◽  
The Common ◽  
Common Onion

Effect of Temperature and Photoperiod on Bulbing of the Common Onion (Allium Cepa L.) Under Arid Tropical Conditions of the Sudan

1967 ◽  
Vol 3 (2) ◽  
pp. 137-142 ◽  
Author(s):  
Abdalla A. Abdalla
Keyword(s):  
High Temperature ◽  
Allium Cepa ◽  
Seasonal Variations ◽  
Effect Of Temperature ◽  
Considerable Influence ◽  
Onion Plant ◽  
Allium Cepa L ◽  
Tropical Conditions ◽  
The Common ◽  
Common Onion

SummaryUnder the arid tropical conditions of the Sudan, where seasonal variations in photoperiod are small but where temperatures are high, there is evidence from the performance of both local and introduced onion varieties that temperature has considerable influence on bulbing. The onset of bulbing does not prohibit the emergence of bladed leaves under such high temperature conditions. The size of the onion plant may be an important factor in the bulbing response under conditions of high temperature and small variations in photoperiod.

Gibberellins as gametocides for the common onion (Allium cepa L.). III. GA4+7 and pollen viability

Euphytica ◽  
1982 ◽  
Vol 31 (2) ◽  
pp. 503-506 ◽  
Author(s):  
Q. P. van der Meer ◽  
J. L. van Bennekom
Keyword(s):  
Allium Cepa ◽  
Pollen Viability ◽  
Allium Cepa L ◽  
The Common ◽  
Common Onion

scholarly journals Phyto-toxic Influence of an Atrazine-based Selective Herbicide – Arda-force® on Onions (Allium cepa L)

2020 ◽  
pp. 40-46
Author(s):  
Doris Fovwe Ogeleka ◽  
Esther Obasi
Keyword(s):  
Root Growth ◽  
Growth Inhibition ◽  
Allium Cepa ◽  
Environmental Protection Agency ◽  
Toxic Effects ◽  
Root Growth Inhibition ◽  
Allium Cepa L ◽  
Test Concentration ◽  
Maximum Root ◽  
Selective Herbicide

Introduction: The constant impact on the environment occasioned by pollution, indiscriminate application of agricultural chemicals, security challenges and crisis in the Niger Delta ecological area of Nigeria has caused severe damage to plants, soil organisms and humans. Aim and Methodology: In this research, onions (Allium cepa L) was exposed to varying concentrations of an atrazine-based selective herbicide Arda-force® to estimate the phyto-toxic effects on the plant species using the Organization for Economic Co-operation and Development, (OECD) protocol #208. Results: The mean effective concentration (EC50) using root growth inhibition produced indications of phyto-toxicity to the exposed species at a concentration of 0.55 ± 0.06 mg/L. Similarly, the maximum root growth inhibition efficiency relative to the control was 65% as recorded in the highest test concentration of 1.25 mg/L. Discussion: The study indicated that constant application / indiscriminate use of the herbicide Arda-force® could cause deleterious influence on these plant and vegetable species, daily consumed by humans as a rich source of anti-oxidants. Conclusion: This study concluded that atrazine-based herbicide Arda-force® used in this assessment resulted in phyto-toxic effects to Allium cepa L. At the exposed concentrations of the herbicide to non-target specie – Allium cepa L. that are integral parts of the ecosystems, the ‘‘harmless’’ status of atrazine acclaimed by the United State Environmental Protection Agency (USEPA) is still very much in doubt.

Relationship between apoplastic ascorbate regeneration and the stimulation of root growth in Allium cepa L.

Plant Science ◽  
1994 ◽  
Vol 100 (1) ◽  
pp. 23-29 ◽  
Author(s):  
JoséA. González-Reyes ◽  
Francisco J. Alcaín ◽  
JoséA. Caler ◽  
Antonio Serrano ◽  
Francisco Córdoba ◽  
...  
Keyword(s):  
Root Growth ◽  
Allium Cepa ◽  
Allium Cepa L ◽  
Ascorbate Regeneration ◽  
Stimulation Of
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