Synergistic inhibitory effects ofp-coumaric and ferulic acids on germination and growth of grain sorghum

1977 ◽  
Vol 3 (2) ◽  
pp. 197-205 ◽  
Author(s):  
James A. Rasmussen ◽  
Frank A. Einhellig
Keyword(s):  
Grain Sorghum ◽  
Inhibitory Effects ◽  
Ferulic Acids ◽  
Germination And Growth

scholarly journals Phytotoxic Effect of Tithonia rotundifolia (Miller) S.F.Blake on Chlorophyll and Protein Contents of Vigna unguiculata L. and Zea mays L.

2019 ◽  
Vol 10 (2) ◽  
pp. 79
Author(s):  
Ilori Olasupo John ◽  
Olutobi Oluwafunmilayo Otusanya
Keyword(s):  
Zea Mays ◽  
Vigna Unguiculata ◽  
Zea Mays L ◽  
Water Soluble ◽  
Inhibitory Effects ◽  
Potted Plants ◽  
Phytotoxic Effect ◽  
Biochemical Analyses ◽  
Germination And Growth ◽  
Range Test

A large number of plants impose inhibitory effects on the germination and growth of neighbouring or successional plants by releasing allelochemicals into the soil. This study investigated the phytotoxic effects of Tithonia rotundifolia (Miller) S.F.Blake on the chlorophyll and protein contents of Vigna unguiculata (L.) Walpers and Zea mays L.. This was with a view to determining the susceptibility of these crops to allelochemicals in the extracts prepared from T. rotundifolia. Seeds of the test plants were sown in pots filled with top humus soil. At two weeks, seedlings in each pot were thinned down to 10 seedlings per pot. Potted plants of the test crops were supplied with 400 ml of the appropriate water extracts while the control potted plants were supplied with 400 ml of water. Biochemical analyses were carried out according to standard methods. The data obtained were analysed by (ANOVA) to determine significant (P< 0.05) effects. The means were compared using Duncan Multiple Range Test. The chlorophyll a, chlorophyll b, total chlorophyll and protein contents in V. unguiculata and Z. mays and were significantly inhibited by the extract from T. rotundifolia. The inhibitory effects of these allelochemicals increased with concentration. The phytotoxic effect of T. rotundifolia was species dependent. It was concluded that the extract contains water-soluble allelochemicals which inhibited the biochemical parameters of the test crops. T. rotundifolia should be controlled where it grows in association with cultivated crops.

scholarly journals Debaryomyces hansenii Strains Isolated From Danish Cheese Brines Act as Biocontrol Agents to Inhibit Germination and Growth of Contaminating Molds

2021 ◽  
Vol 12 ◽  
Author(s):  
Chuchu Huang ◽  
Ling Zhang ◽  
Pernille Greve Johansen ◽  
Mikael Agerlin Petersen ◽  
Nils Arneborg ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Debaryomyces Hansenii ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromosome Polymorphism ◽  
Species Variation ◽  
Inhibitory Effects ◽  
Mycelium Growth ◽  
Native Strains ◽  
Germination And Growth

The antagonistic activities of native Debaryomyces hansenii strains isolated from Danish cheese brines were evaluated against contaminating molds in the dairy industry. Determination of chromosome polymorphism by use of pulsed-field gel electrophoresis (PFGE) revealed a huge genetic heterogeneity among the D. hansenii strains, which was reflected in intra-species variation at the phenotypic level. 11 D. hansenii strains were tested for their ability to inhibit germination and growth of contaminating molds, frequently occurring at Danish dairies, i.e., Cladosporium inversicolor, Cladosporium sinuosum, Fusarium avenaceum, Mucor racemosus, and Penicillium roqueforti. Especially the germination of C. inversicolor and P. roqueforti was significantly inhibited by cell-free supernatants of all D. hansenii strains. The underlying factors behind the inhibitory effects of the D. hansenii cell-free supernatants were investigated. Based on dynamic headspace sampling followed by gas chromatography-mass spectrometry (DHS-GC-MS), 71 volatile compounds (VOCs) produced by the D. hansenii strains were identified, including 6 acids, 22 alcohols, 15 aldehydes, 3 benzene derivatives, 8 esters, 3 heterocyclic compounds, 12 ketones, and 2 phenols. Among the 71 identified VOCs, inhibition of germination of C. inversicolor correlated strongly with three VOCs, i.e., 3-methylbutanoic acid, 2-pentanone as well as acetic acid. For P. roqueforti, two VOCs correlated with inhibition of germination, i.e., acetone and 2-phenylethanol, of which the latter also correlated strongly with inhibition of mycelium growth. Low half-maximal inhibitory concentrations (IC50) were especially observed for 3-methylbutanoic acid, i.e., 6.32–9.53 × 10–5 and 2.00–2.67 × 10–4 mol/L for C. inversicolor and P. roqueforti, respectively. For 2-phenylethanol, a well-known quorum sensing molecule, the IC50 was 1.99–7.49 × 10–3 and 1.73–3.45 × 10–3 mol/L for C. inversicolor and P. roqueforti, respectively. For acetic acid, the IC50 was 1.35–2.47 × 10–3 and 1.19–2.80 × 10–3 mol/L for C. inversicolor and P. roqueforti, respectively. Finally, relative weak inhibition was observed for 2-pentanone and acetone. The current study shows that native strains of D. hansenii isolated from Danish brines have antagonistic effects against specific contaminating molds and points to the development of D. hansenii strains as bioprotective cultures, targeting cheese brines and cheese surfaces.

scholarly journals Pseudomonas and Burkholderia inhibit growth and asexual development of Phytophthora capsici

2018 ◽  
Vol 73 (3-4) ◽  
pp. 123-135 ◽  
Author(s):  
Amena Khatun ◽  
Tarin Farhana ◽  
Abdullah As Sabir ◽  
Shah Mohammad Naimul Islam ◽  
Helen M. West ◽  
...  
Keyword(s):  
Burkholderia Cepacia ◽  
Culture Supernatant ◽  
Phytophthora Capsici ◽  
16S Rrna Gene Sequencing ◽  
Rrna Gene ◽  
Inhibitory Effects ◽  
Morphological Alterations ◽  
Rrna Gene Sequencing ◽  
Germination And Growth ◽  
Cell Free Culture Supernatant

AbstractThe objective of this study was to isolate and characterize antagonistic rhizobacteria from chili against a notorious phytopathogenPhytophthora capsici. Among the 48 bacteria isolated, BTLbbc-02, BTLbbc-03, and BTLbbc-05 were selected based on their inhibitory activity againstP. capsici. They were tentatively identified asBurkholderia metallicaBTLbbc-02, Burkholderia cepaciaBTLbbc-03, andPseudomonas aeruginosaBTLbbc-05, respectively, based on their 16S rRNA gene sequencing. All inhibited the growth ofP. capsiciat varying levels by inducing characteristic morphological alterations ofP. capsicihyphae. The cell-free culture supernatant of all three isolates impaired motility (up to 100%) and caused lysis (up to 50%) of the halted zoospores. Bioassays revealed thatPseudomonassp. had higher antagonism and zoospore motility-inhibitory effects againstP. capsicicompared with two other isolates,Burkholderiaspp. andB. metallica, which caused vacuolation in mycelium. All three bacteria suppressed sporangium formation and zoosporogenesis ofP. capsici, and improved the seed germination and growth of cucumber. Our findings suggest that epiphytic bacteria,B. metallica,B. cepacia, andP. aeruginosa, could be used as potential biocontrol agents againstP. capsici. A further study is required to ensure conformity with the existing regulations for soil, plant, and human health.

Inhibitory effects of Albizia lebbeck leaf extracts on germination and growth behavior of some popular agricultural crops

2007 ◽  
Vol 18 (2) ◽  
pp. 128-132 ◽  
Author(s):  
Mohammad Belal Uddin ◽  
Romel Ahmed ◽  
Sharif Ahmed Mukul ◽  
Mohammed Kamal Hossain
Keyword(s):  
Growth Behavior ◽  
Agricultural Crops ◽  
Albizia Lebbeck ◽  
Inhibitory Effects ◽  
Leaf Extracts ◽  
Germination And Growth

scholarly journals Abundant Allelochemicals and the Inhibitory Mechanism of the Phenolic Acids in Water Dropwort for the Control of Microcystis aeruginosa Blooms

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2653
Author(s):  
Jixiang Liu ◽  
Yajun Chang ◽  
Linhe Sun ◽  
Fengfeng Du ◽  
Jian Cui ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Phenolic Acids ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Inhibitory Effect ◽  
Simultaneous Action ◽  
Inhibitory Effects ◽  
Chl A ◽  
Ferulic Acids ◽  
Water Dropwort

In recent years, with the frequent global occurrence of harmful algal blooms, the use of plant allelopathy to control algal blooms has attracted special and wide attention. This study validates the possibility of turning water dropwort into a biological resource to inhibit the growth of harmful Microcystis aeruginosa blooms via allelopathy. The results revealed that there were 33 types of allelopathic compounds in the water dropwort culture water, of which 15 were phenolic acids. Regarding water dropwort itself, 18 phenolic acids were discovered in all the organs of water dropwort via a targeted metabolomics analysis; they were found to be mainly synthesized in the leaves and then transported to the roots and then ultimately released into culture water where they inhibited M. aeruginosa growth. Next, three types of phenolic acids synthesized in water dropwort, i.e., benzoic, salicylic, and ferulic acids, were selected to clarify their inhibitory effects on the growth of M. aeruginosa and their mechanism(s) of action. It was found that the inhibitory effect of phenolic acids on the growth of M. aeruginosa increased with the increase of the exposure concentration, although the algae cells were more sensitive to benzoic acid than to salicylic and ferulic acids. Further study indicated that the inhibitory effects of the three phenolic acids on the growth of M. aeruginosa were largely due to the simultaneous action of reducing the number of cells, damaging the integrity of the cell membrane, inhibiting chlorophyll a (Chl-a) synthesis, decreasing the values of F0 and Fv/Fm, and increasing the activity of the antioxidant enzymes (SOD, POD, and CAT) of M. aeruginosa. Thus, the results of this study indicate that both culture water including the rich allelochemicals in water dropwort and biological algae inhibitors made from water dropwort could be used to control the growth of noxious algae in the future.

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