scholarly journals Germination and Early Seedling Growth of Two Rice Varieties as Affected by Invasive Ageratina adenophora

2020 ◽  
Vol 8 (2) ◽  
pp. 108-117
Author(s):  
Kavita Khatri ◽  
Kiran Bargali ◽  
Bhawana Negi ◽  
S.S. Bargali
Keyword(s):  
Seedling Growth ◽  
Plant Extracts ◽  
Leaf Extract ◽  
Seed Vigor ◽  
Root Extract ◽  
Rice Varieties ◽  
Allelopathic Potential ◽  
Early Seedling Growth ◽  
Ageratina Adenophora ◽  
Early Seedling

Ageratina adenophora is a perennial herb of family Asteraceae expanding as a serious threat to ecological integrity and biodiversity. This study aims to assess the allelopathic potential of fresh and dry leaf and root aqueous extracts of this invasive species on germination, early seedling growth, seedling biomass and seed vigor of two rice (Oryza sativa L.) varieties namely 6444 and 2245. The result revealed that with increasing concentration of extract, inhibition effect also increases. Leaf extract was more inhibitory than root extract and dry plant extracts had higher allelopathic impact in comparison to fresh plant extracts. Among the two investigated rice varieties 6444 was more resistant to the fresh and dry leaf extract while 2245 was more resistant to fresh and dry root extract. This study will be helpful in assessing the effect caused by A. adenophora to rice crop and could be used in devising weed control strategy.

scholarly journals Effect of Seed Priming on Improvement of Germination of Vicia Villosa Under Allelopathic Components of Eucalyptus Camaldulensis

2014 ◽  
Vol 66 (1) ◽  
pp. 99-108 ◽  
Author(s):  
Morteza Saberi ◽  
Farajollah Tamian
Keyword(s):  
Seedling Growth ◽  
Eucalyptus Camaldulensis ◽  
Seed Priming ◽  
Germination Percentage ◽  
Seed Vigor ◽  
Vicia Villosa ◽  
Early Seedling Growth ◽  
Vigor Index ◽  
Early Seedling ◽  
Plant Length

Abstract The objective of this study was to evaluate the effectiveness of seed priming in improving seed germination and seedling vigor of Vicia villosa under laboratory conditions. Chemical stimulators included: gibberel-lic acid (125,250 and 500 ppm), salicylic acid (100,200 and 300 mg/lit) and extract of Eucalyptus camaldulen-sis (0, 25, 50, 75 and 100 %). This experiment was carried out as factorial experiment based on a randomized completely design, with four replications. The results showed that Eucalyptus camaldulensis extract had in-hibitive effect on germination and early seedling growth of Vicia villosa. Early seedling growth of Vicia villosa increased by pretreatment of seeds in chemical stimulators so that the highest effect was observed in gibberellic acid (250 ppm). The chemical stimulators don’t have any effect on germination speed. Interaction effects of allelopathic and pretreatment with chemical stimulators were significance on germination percentage, root, shoot and plant length and seed vigor index.

scholarly journals Allelopathic effects of water extracts of Sorghum halepense (L.) Pers., Convolvulus arvensis L. and Cirsium arvense Scop. on early seedling growth of some leguminous crops

2014 ◽  
Vol 29 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Irena Golubinova ◽  
Anna Ilieva
Keyword(s):  
Seedling Growth ◽  
Seed Vigor ◽  
Sorghum Halepense ◽  
Cirsium Arvense ◽  
Root Weight ◽  
Convolvulus Arvensis ◽  
Forage Crops ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Allelopathic Effects

In order to study the allelopathic effect of aboveground dry biomass of Sorghum halepense, Convolvulus arvensis and Cirsium arvense on seed germination and early seedling growth of Pisum sativum (L.), varieties Mir (winter form) and Kerpo (spring form); Vicia sativa (L.), variety Tempo, and Medicago sativa (L.), variety Dara, a laboratory experiment was conducted at the Institute of Forage Crops - Pleven. Four concentrations: 1.25, 2.5, 5.0 and 10.0% were applied to each weed biotype used to study allelopathic effects. The results showed that weed extracts significantly decreased germination percentage, shoot and root length (cm), shoot and root weight (g), and seed vigor index (SVI1 and SVI2) of the tested species. In general, the variable effects are related to the weed species and extract concentrations.

scholarly journals Effect of seed priming on seed vigor and early seedling growth in maize under optimal and suboptimal temperature conditions

2016 ◽  
Vol 22 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Petar Canak ◽  
Milan Mirosavljevic ◽  
Mihajlo Ciric ◽  
Jelena Keselj ◽  
Bojana Vujosevic ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Seed Priming ◽  
Seed Vigor ◽  
Suboptimal Temperature ◽  
Temperature Conditions ◽  
Early Seedling Growth ◽  
Early Seedling

scholarly journals Allelopathic Effect of Echinochloa colona L. and Cyperus iria L. Weed Extracts on the Seed Germination and Seedling Growth of Rice and Soyabean

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Neha Chopra ◽  
Geeta Tewari ◽  
Lalit M. Tewari ◽  
Brij Upreti ◽  
Naveen Pandey
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Aerial Part ◽  
Water Soluble ◽  
Allelopathic Effect ◽  
Root Extract ◽  
Allelopathic Potential ◽  
Root Extracts ◽  
Seedling Length ◽  
Early Seedling

The present study was undertaken to assess the allelopathic effect of Echinochloa colona L. and Cyperus iria L. in relation to the germination and primary growth of Oryza sativa L. (rice) and Glycine max L. (soyabean). Effects of dichloromethane (DCM) and double distilled water soluble (DDW) fractions of E. colona L. and C. iria L. root and aerial part extracts reduced germination and suppressed early seedling growth of rice and soyabean. With increase in extract concentration from 1 to 100 mg/mL, a gradual decrease in seed germination and seedling length occurred. The highest growth of G. max seedling was recorded in DDW fraction of E. colona aerial part extract at 1 mg/mL concentration with 94% germination and the lowest length was found in DCM fraction of C. iria root extract at 100 mg/mL concentration with 65% germination. In O. sativa, the highest length was noted at 1 mg/mL concentration in DDW fraction of E. colona aerial part extract with 82% germination and the lowest length was found in DCM fraction of C. iria and E. colona root extracts with germination 57% and 62%, respectively, at 100 mg/mL concentration. The results suggested that these weeds had good allelopathic potential which reduces germination and plant growth.

Effects of salinity on seedling emergence and early seedling growth of Irvingia gabonensis (Irvingiaceae)

2017 ◽  
Vol 45 (2) ◽  
pp. 282-295
Author(s):  
R. Vihotogbé ◽  
C. Watson ◽  
R. Glèlè Kakaï ◽  
F. Wichern ◽  
B. Sinsin ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Seedling Emergence ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Irvingia Gabonensis
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