Allelopathic Effects, Physiological Responses and Phenolic Compounds in Litter Extracts of Juniperus rigida Sieb . et Zucc .

2017 ◽  
Vol 14 (8) ◽  
pp. e1700088 ◽  
Author(s):  
Jing Liu ◽  
Dengwu Li ◽  
Dongmei Wang ◽  
Yu Liu ◽  
Huiying Song
Keyword(s):  
Phenolic Compounds ◽  
Physiological Responses ◽  
Allelopathic Effects

Utilization of kudzu as a lead phytoremediator and the impact of lead on selected physiological responses

2013 ◽  
Vol 93 (5) ◽  
pp. 951-959 ◽  
Author(s):  
Kristin Schwarzauer-Rockett ◽  
Safaa H. Al-Hamdani ◽  
James R. Rayburn ◽  
Nixon O. Mwebi
Keyword(s):  
Phenolic Compounds ◽  
Stomatal Conductance ◽  
Lead Concentration ◽  
Ethylenediaminetetraacetic Acid ◽  
Physiological Responses ◽  
Dry Weight ◽  
Control Treatment ◽  
Total Phenolic ◽  
Plant Responses ◽  
The Impact

Schwarzauer-Rockett, K., Al-Hamdani, S. H., Rayburn, J. R. and Mwebi, N. O. 2013. Utilization of kudzu as a lead phytoremediator and the impact of lead on selected physiological responses. Can. J. Plant Sci. 93: 951–959. This study was carried out to evaluate kudzu [Pueraria montana var. lobata (Willd.)] in lead phytoremediation. The impact of lead (PbNO3) concentrations of 100 and 200 mg L−1 on plant growth, photosynthetic pigments, photosynthesis, and stomatal conductance were evaluated. Additionally, concentrations of phenolic compounds and anthocyanin were determined. The lead was dissolved in 0.142 g L−1 ethylenediaminetetraacetic acid (EDTA) and an EDTA control treatment was added to evaluate the impact of EDTA on the above selected plant responses. Root accumulation of lead was significantly higher than in the shoot. Kudzu growth in response to the presence of lead and EDTA in the Hoagland's solution was similar to that of the EDTA control, except for plants growing at 200 mg L−1, which showed significantly lower root dry weight. Total phenolic compounds increased with the presence of EDTA and lead in the Hoagland's solution. Photosynthetic rate, stomatal conductance, chlorophyll a and chlorophyll b, carotenoids, and anthocyanin were not different (P≤0.05) among the treatments, with the exception that carotenoids were significantly higher in plants growing in the presence of EDTA without lead compared with 200 mg L−1 lead concentration. Kudzu accumulated most of the lead in the root and therefore can be considered as a rhizofiltrator. As kudzu was able to accumulate 1.02% (wt/wt) of lead it can be considered a hyper-accumulator.

scholarly journals Modulation of Physiological Stress Response of Triticum aestivum L. to Glyphosate by Brassinosteroid Application

Life ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1156
Author(s):  
Elena Shopova ◽  
Zornitsa Katerova ◽  
Liliana Brankova ◽  
Ljudmila Dimitrova ◽  
Iskren Sergiev ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Phenolic Compounds ◽  
Winter Wheat ◽  
Antioxidant Defense ◽  
Physiological Stress ◽  
Physiological Responses ◽  
Triticum Aestivum L ◽  
Guaiacol Peroxidase ◽  
Herbicide Application ◽  
Wheat Seedlings

The potential of brassinosteroids to modulate the physiological responses of winter wheat (Triticum aestivum L.) to herbicide stress was evaluated. Young winter wheat seedlings were treated with 24-epibrassinolide (EBL) and 24 h later were sprayed with glyphosate. The physiological responses of treated plants were assessed 14 days after herbicide application. Wheat growth was noticeably inhibited by glyphosate. The herbicide application significantly increased the content of the stress markers proline and malondialdehyde (MDA) evidencing oxidative damage. The content of phenolic compounds was decreased in the herbicide-treated plants. Slight activation of superoxide dismutase (SOD) and catalase (CAT) and considerable increase of glutathione reductase (GR) and guaiacol peroxidase (POX) activities were found. Increased POX and glutathione S-transferase (GST) activities were anticipated to be involved in herbicide detoxification. Conjugation with glutathione in herbicide-treated plants could explain the reduction of thiols suggesting unbalanced redox state. EBL application did not alter the plant growth but a moderate activation of antioxidant defense (POX, GR, and CAT activities and phenolic levels) and detoxifying enzyme GST was observed. The hormonal priming provoked a slight decrease in MDA and proline levels. The results demonstrate that EBL-pretreatment partly restored shoot growth and has a potential to mitigate the oxidative damages in glyphosate-treated plants through activation of the enzymatic antioxidant defense and increase of the phenolic compounds.

scholarly journals Allelopathic effects of phenolic compounds released by Vallisneria spiralis on Microcystis aeruginosa

2011 ◽  
Vol 23 (5) ◽  
pp. 761-766 ◽  
Author(s):  
GAO Yunni ◽  
◽  
LIU Biyun ◽  
WANG Jing ◽  
HE Feng ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Microcystis Aeruginosa ◽  
Vallisneria Spiralis ◽  
Allelopathic Effects

scholarly journals Allelopathic Potential of Aqueous Extract from Acacia melanoxylon R. Br. on Lactuca sativa

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1228
Author(s):  
M. Iftikhar Hussain ◽  
Mohamed A. El-Sheikh ◽  
Manuel J. Reigosa
Keyword(s):  
Phenolic Compounds ◽  
Aqueous Extract ◽  
Lactuca Sativa ◽  
Plant Biomass ◽  
Dry Weight ◽  
Fresh Weight ◽  
Allelopathic Potential ◽  
Acacia Melanoxylon ◽  
Root Dry Weight ◽  
Allelopathic Effects

We studied the polyphenol (phenolic compounds and flavonoids) composition and allelopathic effects of Acacia melanoxylon R. Br. aerial foliage aqueous extract (0%, 25%, 50%, 75% and 100%) on the seedling growth and plant biomass of the general biotest species, lettuce (Lactuca sativa). Mean leaf fresh weight, leaf dry weight, root fresh weight and root dry weight were decreased following exposure to Acacia aerial foliage, flowers aqueous extract (AFE) and phyllodes aqueous extract (APE) after 6 days. The reduction in plant dry biomass was more than 50% following treatment with AFE. The decrease in mean root length was approximately 37.7% and 29.20% following treatment with Acacia flowers extract (AFE) at 75% and 100% concentration, respectively. Root dry weight of L. sativa was reduced by both flowers and phyllodes extract. The reduction of protein contents in lettuce leaves following Acacia foliage extract proved that both AFE and APE exhibit polyphenols that causes the toxicity which led to decrease in leaf protein contents. High-Performance Liquid Chromatography (HPLC) was employed to analyze the A. melanoxylon flowers and phyllodes. A total of 13 compounds (accounting for most abundant compounds in flowers and phyllodes) include different flavonoids and phenolic compounds. The phytochemical compounds detected were: Gallic acid, protocatechuic acid, p-hydroxybenzoic acid, p-hydroxybenzaldehyde, vanillic acid, syringic acid, p-coumaric acid, and ferulic acid. The major flavonoid compounds identified include rutin, luteolin, apigenin, and catechin. Allelopathic effects of flower and phyllodes extracts from A. melanoxylon may be due to the presence of above compounds identified by HPLC analysis.

scholarly journals Allelopathic Effects of LitterAxonopus compressusagainst Two Weedy Species and Its Persistence in Soil

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
B. Samedani ◽  
A. S. Juraimi ◽  
M. Y. Rafii ◽  
A. R. Anuar ◽  
S. A. Sheikh Awadz ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Chlorophyll Concentration ◽  
Germination Percentage ◽  
Shoot Length ◽  
Allelopathic Effect ◽  
Hypocotyl Length ◽  
Weedy Species ◽  
Allelopathic Effects ◽  
Litter Leachate ◽  
Asystasia Gangetica

This study investigated the allelopathic effect ofAxonopus compressuslitter onAsystasia gangeticaandPennisetum polystachion. In experiment 1 the bioassays with 0, 10, 30, and 50 g L−1of aqueousA. compressuslitter leachate were conducted. Experiment 2 was carried out by incorporating 0, 10, 20, 30, 40, and 50 g L−1ofA. compressuslitter leachate into soil. In experiment 3, the fate ofA. compressuslitter leachate phenolics in the soil was investigated.A. compressusleachates did not affect the germination percentage ofA. gangeticaandP. polystachion, but delayed germination ofA. gangeticaseeds and decreased seed germination time ofP. polystachion.A. compressuslitter leachates affected weeds hypocotyl length. Hypocotyl length reductions of 18 and 31% were observed at the highest concentration (50 g L−1) compared to the control inA. gangeticaandP. polystachion, respectively. When concentration ofA. compressuslitter leachate-amended soil increasedA. gangeticaandP. polystachionseedling shoot length, root length, seedling weight and chlorophyll concentration were not affected. The 5-week decomposition study ofA. compressusshowed that the phenolic compounds inA. compressuslitter abruptly decreased about 52% after two weeks and remained steady until the end of the incubation.

scholarly journals Phenolic Compounds from Merremia umbellata subsp. orientalis and Their Allelopathic Effects on Arabidopsis Seed Germination

Molecules ◽  
2010 ◽  
Vol 15 (11) ◽  
pp. 8241-8250 ◽  
Author(s):  
Jian Yan ◽  
Hai-Hong Bi ◽  
Yong-Zhu Liu ◽  
Mei Zhang ◽  
Zhong-Yu Zhou ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Seed Germination ◽  
Arabidopsis Seed ◽  
Allelopathic Effects

scholarly journals Profiles of Compounds in Stover of Rice, Cymbopogon, Desmodium, Mucuna and Maize

2021 ◽  
Vol 13 (9) ◽  
pp. 183
Author(s):  
M. G. Kaiira ◽  
G. N. Chemining’wa ◽  
F. Ayuke ◽  
Y. Baguma
Keyword(s):  
Phenolic Compounds ◽  
Crop Residues ◽  
Solid Phase ◽  
Crop Productivity ◽  
Mucuna Pruriens ◽  
Agricultural Ecosystems ◽  
System Data ◽  
Data Files ◽  
Allelopathic Effects ◽  
Pair Wise Comparison

Crop residues and mulches release phytotoxic substances into the soil that affect plant growth. An experiment was conducted at the Uganda National Crop Resources Research Institute, Namulonge during 2016, to identify compounds in the stover of potted Cymbopogon nardus, Desmodium uncinatum, Oryza sativa, (NERICA 1), Mucuna pruriens and Zea mays (LONGE 6H) at fourty five days after germination. This marked near the average stationary phase for test crops’ growth when secondary metabolites are maximum. Organic compounds in the stover were extracted using solid phase micro-extraction. Samples were subjected to analysis using a 7890A Gas Chromatography system. Data files were transferred into a distinct folder and data was uploaded onto XCMS online platform for pair wise comparison and other related statistical analysis in the National institute of Science and Technology library. Ten terpenoids and one ester were identified in cymbopogon stover. Desmodium stover released six terpenoids and three phenols. Rice stover produced six terpenoids, three phenolic compounds and one ester. Mucuna stover released two terpenoids and four phenols. The maize stover produced five terpenoids and four phenolic compounds. Profiled compounds from cymbopogon, desmodium, rice, mucuna and maize could be responsible for the reported negative allelopathic effects such as auto-toxicity and suppression of companion crops expressed in agricultural ecosystems. Allelopathic activity of the profiled compounds should be confirmed through bioassays extracts and residues studies. The development and incorporation of the profiled metabolites into agricultural management system may lead to the production of bio-herbicides that reduce environmental degradation and increase crop productivity.

Sign in / Sign up

Export Citation Format

Share Document