scholarly journals Effects of the Zeolite, Plant Growth Promoting Rhizobactria (PGPR) and Humic Acid on early growth of Atriplex canescens L. seedlings in Arak

Arid Biome ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 27-35
Author(s):  
N. Abdi
Keyword(s):  
Humic Acid ◽  
Plant Growth ◽  
Early Growth ◽  
Atriplex Canescens ◽  
Plant Growth Promoting ◽  
Growth Promoting

Effects of humic acid and plant growth-promoting rhizobacteria (PGPR) on induced resistance of canola to Brevicoryne brassicae L

2018 ◽  
Vol 109 (4) ◽  
pp. 479-489 ◽  
Author(s):  
R. Sattari Nasab ◽  
M. Pahlavan Yali ◽  
M. Bozorg-Amirkalaee
Keyword(s):  
Humic Acid ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Brevicoryne Brassicae ◽  
Control Treatment ◽  
Net Reproductive Rate ◽  
Rate Of Increase ◽  
Significant Difference ◽  
Plant Growth Promoting ◽  
Growth Promoting

AbstractThe cabbage aphid, Brevicoryne brassicae L. (Hem: Aphididae), is an important pest of canola that can considerably limit profitable crop production either through direct feeding or via transmission of plant pathogenic viruses. One of the most effective approaches of pest control is the use of biostimulants. In this study, the effects of humic acid, plant growth-promoting rhizobacteria (PGPR), and integrated application of both compounds were investigated on life table parameters of B. brassicae, and the tolerance of canola to this pest. B. brassicae reared on plants treated with these compounds had the lower longevity, fecundity, and reproductive period compared with control treatment. The intrinsic rate of natural increase (r) and finite rate of increase (λ) were lowest on PGPR treatment (0.181 ± 0.004 day−1 and 1.198 ± 0.004 day−1, respectively) and highest on control (0.202 ± 0.005 day−1 and 1.224 ± 0.006 day−1, respectively). The net reproductive rate (R0) under treatments of humic acid, PGPR and humic acid + PGPR was lower than control. There was no significant difference in generation time (T) of B. brassicae among the tested treatments. In the tolerance test, plants treated with PGPR alone or in integrated with humic acid had the highest tolerance against B. brassicae. The highest values of total phenol, flavonoids, and glucosinolates were observed in treatments of PGPR and humic acid + PGPR. Basing on the antibiosis and tolerance analyses in this study, we concluded that canola plants treated with PGPR are more resistant to B. brassicae. These findings could be useful for integrated pest management of B. brassicae in canola fields.

scholarly journals Performance of pre-sprouted sugarcane seedlings in response to the application of humic acid and plant growth-promoting bacteria

2018 ◽  
Vol 39 (3) ◽  
pp. 1365
Author(s):  
Hend Pereira de Oliveira ◽  
Raphael Oliveira de Melo ◽  
Marihus Altoé Baldotto ◽  
Messias Antônio Andrade ◽  
Lílian Estrela Borges Baldotto
Keyword(s):  
Humic Acid ◽  
Plant Growth ◽  
New Technology ◽  
Plant Growth Promoting Bacteria ◽  
Multiplication Rate ◽  
Combined Use ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
The Individual ◽  
Seedling Characteristics

Sugarcane cultivation using pre-sprouted seedlings has decreased the number of stalks used per hectare, increased the multiplication rate, improved seedling health, and increased planting uniformity. However, because this system has been only recently proposed, the number of studies evaluating this new technology is still scarce, particularly those examining the effect of the application of growth-promoting substances on seedling characteristics during the production phase. Here, we hypothesized that it is possible to combine the plant growth-promoting activity of humic acid (HA) with the inoculation of selected strains of plant growth-promoting bacteria (PGPB) to improve the yield of sugarcane seedlings compared with the individual application of these two techniques. The potential of the combined use of HA and PGPB as agricultural inputs was evaluated by conducting an experiment with sugarcane micro cuttings in a greenhouse. Treatments included control, PGPB, HA, and PGPB with HA. At the end of the experiment (60 d after planting), the plants were subjected to biometric evaluation. The results indicated that it was possible to combine HA with selected strains of PGPB (Burkholderia sp.) to improve the yield of seedlings compared with individual HA and PGPB treatments. HA, PGPB, and HA + PGPB increased the total dry matter compared with the control by 23%, 25%, and 36%, respectively. Therefore, the use of HA-based plant regulators in combination with PGPB was more effective than the isolated use of these inputs for the treatment of micro cuttings and improvement of sugarcane seedling yield.

scholarly journals Effect of plant growth promoting bacteria on early growth of wheat cultivars

2019 ◽  
Vol 62 (3) ◽  
pp. 247-250
Author(s):  
Sang Gyu Lee ◽  
Hyeri Lee ◽  
Jimin Lee ◽  
Byung Cheon Lee ◽  
Hojoung Lee ◽  
...  
Keyword(s):  
Plant Growth ◽  
Early Growth ◽  
Plant Growth Promoting Bacteria ◽  
Wheat Cultivars ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Early Growth Stage Root-Associated Endophytes Isolated From Ulex Europaeus L. (Fabaceae) Colonizing Rural Areas in South-Central Chile

2021 ◽  
Author(s):  
Hector Herrera ◽  
Alejandra Fuentes ◽  
Javier Ortiz ◽  
Javiera Soto ◽  
Rafael Vorges Da-Silva Valadares ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Stage ◽  
Early Growth ◽  
Central Chile ◽  
Early Growth Stage ◽  
Ulex Europaeus ◽  
South Central ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Plant Growth Promoting Traits

Abstract Background and aimsUlex europaeus L. (Fabaceae), commonly known as gorse, is an invasive woody shrub that easily grows in several locations across the world. However, little is known about the interactions of this invasive species with soil microorganisms and how these microbes can promote reaching rapid grow-rates at early stages of development. We aim at characterizing the endophytic fungal and bacterial microbiota associated with roots of early growth stage U. europaeus colonizing native ecosystems in south-central Chile.MethodsRoot-associated microorganisms were isolated and identified using standard molecular techniques. Furthermore, plant growth-promoting traits were studied and biocontrol activity was assessed to characterize the early growth stage root-associated taxa. ResultsFour endophytic fungi belonging to Sordariomycetes and twelve bacteria assigned to Proteobacteria and Actinobacteria were identified as the principal early growth stage root-endophytic taxa. Plant growth-promoting traits were detected in several isolates such as Fusarium acuminatum and Rhodococcus sp. Besides, some of the isolates such as Rhodococcus sp. and Purpureocillium lilacinum showed biocontrol potential against phytopathogenic fungi. ConclusionsOur results demonstrate that early growth stage root endophytic taxa associated with U. europaeus have beneficial plant growth-promoting traits that can contribute with the rapid growth-rates of the shrub. The interaction with a set of beneficial microorganisms is an additional mechanism to explain the ability of U. europaeus for colonizing in various ecosystems.

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