Effects of Persian walnut leaf extracts on seed germination, seedling growth, and some physiological characteristics of the basil (Ocimum basilicumL.) cultivar ‘Genovese’

2013 ◽  
Vol 88 (4) ◽  
pp. 433-438
Author(s):  
Monad Dadi ◽  
Davood Bakhshi ◽  
Gholamali Peyvast ◽  
Zahra Balouchi
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Physiological Characteristics ◽  
Leaf Extracts ◽  
Persian Walnut

scholarly journals The Effects of Leaf Extracts of Four Tree Species on Amygdalus pedunculata Seedlings Growth

2021 ◽  
Vol 11 ◽  
Author(s):  
Xiuqing Wang ◽  
Ruiqi Zhang ◽  
Jinxin Wang ◽  
Long Di ◽  
Huaibiao Wang ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Coal Mine ◽  
Tree Species ◽  
Cell Membrane Permeability ◽  
Pinus Tabulaeformis ◽  
Allelopathic Effect ◽  
Fresh Weight ◽  
Leaf Extracts ◽  
Fragile Environment

Vegetation reconstruction is an urgent problem in fragile environment like coal mine subsidence areas. Amygdalus pedunculata is an important eco-economic shrub species that promotes wind prevention, sand fixation as well as soil and water conservation. The natural regeneration of pure Amygdalus pedunculata forests is difficult to achieve because of its low seed germination rate and weak seedling growth. A stereo-complex ecosystem could potentially promote the germination and seedling growth of A. pedunculata and establish a steady mixed plantation consisting of trees and shrubs. Here, laboratory and pot experiments were conducted to assess the effect of four tree species on morphological and physiological indexes of A. pedunculata. The laboratory experiment showed that A. pedunculata seed germination and seedling growth from Yuyang County (YC-1) and Shenmu County (SC-6) were higher when plants were treated with the aqueous leaf extracts of Pinus sylvestris, Broussonetia papyrifera, and Pinus tabulaeformis compared with Populus simonii at concentrations of 2.5% (E2.5) and 5% (E5). Furthermore, the donor leaf extract was more sensitive to YC-1 than to SC-6. The pot experiment showed that the E2.5 and E5 treatments with the aqueous leaf extracts on the three tree species had strong promoting effects of seedling length, root length, seedling fresh weight, root fresh weight, and ground diameter for YC-1. The activity of catalase of A. pedunculata seedlings first increased and then decreased, while the activity of peroxidase, superoxide dismutase, roots, and the contents of soluble protein and chlorophyll decreased; the opposite patterns were observed for malondialdehyde, soluble sugar, cell membrane permeability, and proline were the opposite. Synthetical allelopathic effect index values of the leaf extracts of the three species on YC-1 were as follows: P. sylvestris > B. papyrifera > P. tabulaeformis (E2.5 to E20). Therefore, P. sylvestris and B. papyrifera could be used to promote the growth of A. pedunculata seedlings as well as for the construction of mixed plantations in coal mine degradation areas. Generally, this study provides new insight into the creation of stereo-complex ecosystems (P. sylvestris + A. pedunculata and B. papyrifera + A. pedunculata) in arid fragile environment.

scholarly journals Response of walnut (Juglans regia L.) leaf aqueous extracts, on seed germination and seedling growth of wheat (Triticum aestivum L.) in agri-silvi system of Uttarakhand

2013 ◽  
Vol 5 (2) ◽  
pp. 411-415
Author(s):  
Abhishek Bahuguna ◽  
Sandhya Bahuguna ◽  
Birendra Prasad
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Juglans Regia ◽  
Wheat Variety ◽  
Shoot Length ◽  
Dependent Manner ◽  
Aqueous Extracts ◽  
Leaf Extracts ◽  
Concentration Dependent Manner ◽  
Root And Shoot Length

Effect of different doses of aqueous extracts of walnut leaf was studied on germinating seeds and early seedling growth of wheat variety (cv. VL-616) recommended for hills under West Himalayan agri-silvi system. Seven treatments comprised of distilled water control (0%), 10%, 20%, 30%, 40%, 50% and 60% concentration of leaf extracts were treated. The effect of aqueous extracts was found inhibitive; indicate a direct proportional relationship with concentration dependent manner on seed germination and subsequent seedling growth of wheat. The wheat variety exhibited extent of phytotoxicity at 60% extracts application in comparison to untreated control. Invariably there was a decrease in first count, germination, seedling root and shoot length, seedling fresh and dry weight and vigour index with increasing aqueous extracts concentration on germinating wheat, however the shoot length was observed maximum at 60% concentration.

scholarly journals Allelopathic Interference of Ageratum conyzoides L. against Rice Varieties

2020 ◽  
pp. 69-76
Author(s):  
Bhawna Negi ◽  
S.S Bargali ◽  
Kiran Bargali ◽  
Kavita Khatri
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Leaf Extract ◽  
Water Soluble ◽  
Allelopathic Effect ◽  
Aqueous Extracts ◽  
Ageratum Conyzoides ◽  
Leaf Extracts ◽  
Rice Varieties ◽  
Seedling Length

Ageratum conyzoides L. is an invasive weed that has severely infested cultivated lands and interferes with the growth of crops. In this study aqueous extracts of 50 and 100% concentration were prepared from fresh and air dried plant parts (Leaves and roots) of A. conyzoides and their allelopathic effect was observed on seed germination and seedling growth of two rice varieties namely Sava and Geru. In Sava variety, a significant reduction in seed germination, seedling length and dry weight was recorded under dry leaf extract while under fresh leaf extract seed germination and seedling length was increased at 50% concentration as compared to control. In Geru variety both fresh and dry leaf extracts resulted in decreased seed germination and seedling growth with increasing concentration. Similar patterns were recorded for fresh and dry root extracts. The inhibitory effect of leaf extracts was more pronounced than root extract and overall dry aqueous extracts of leaf and root were more inhibitory than fresh aqueous extracts. Among varieties, Sava was least affected as compared to the Geru. This study indicated that A. conyzoides exert allelopathic effect towards rice crop by releasing water soluble phytochemicals.

scholarly journals Nano-cuprous oxide enhances seed germination and seedling growth in Lycopersicum esculentum plants

2019 ◽  
Vol 9 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Ananda S ◽  
Shobha G ◽  
Shashidhara KS ◽  
Vishwaprakash Mahadimane
Keyword(s):  
Lipid Peroxidation ◽  
Antioxidant Enzymes ◽  
Seed Germination ◽  
Seedling Growth ◽  
Cuprous Oxide ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Phenol Oxidase ◽  
Leaf Extracts ◽  
Tomato Seedlings

This study was carried out to determine the influence of cuprous oxide nanoparticles (Cu2O NPs) biosynthesised from leaf extracts of Flacourtia montana on the tomato Lycioersicum esculentum seed germination, seedling growth and vigour index. Here we examined the promotory and phytotoxic effect of Cu2O NPs (0-160ppm) on tomato seeds resulted in dosage dependent response. The highest germination percentage (95%) was observed at 20ppm Cu2O NPs, however, above 20ppm Cu2O NPs, there is a reduction in the seed germination. The tomato seedlings showed increased root and shoot elongation up to 20ppm Cu2O NPs concentration, further increase in NPs concentration caused the negative effect on plants growth and development. The leaf pigments showed increasing trend in tomato plants after treatment with Cu2O NPs up to 20ppm as compared to control. Phytotoxicity of Cu2O NPs in tomato seedlings demonstrated by lower contents of chlorophyll a, b and carotenoid pigments. The study of effect on antioxidant enzymes showed increases in activity with increase in Cu2O NPs concentration for two enzymes, Super oxide dismutase (SOD) and Glutathione Peroxidase (GPX) out of five enzymes treated. High antioxidant activity of enzymes is followed by the increased lipid peroxidation and decrease in free radical scavenging activity by the DPPH. The activity of Catalase, Pheny Alanine Aminolyase and Poly Phenol Oxidase enzymes were found to increase up to 20ppm as compared to control and above this, all three enzymes showed decrease in activity. Uptake of Cu2O NPs nanoparticle by tomato seedlings was confirmed by atomic absorption spectroscopy.  Key words: Nano-Cuprous Oxide, Flacourtia montana, Tomato, antioxidant enzymes, lipid peroxidation

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