scholarly journals Efficiency of Mycorrhizal Fungi with Different Levels of Phosphatic Fertilizer on Growth of Piper mullesua Plantlets

2020 ◽  
Vol 9 (3) ◽  
pp. 771-785
Author(s):  
Arundhati Bordoloi ◽  
A. K. Shukla
Keyword(s):  
Mycorrhizal Fungi ◽  
Phosphatic Fertilizer ◽  
Different Levels

scholarly journals FUNGOS MICORRÍZICOS ARBUSCULARES E DOSES DE FÓSFORO NO DESENVOLVIMENTO DE MUDAS DE GUANANDI

Nativa ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 246
Author(s):  
Edilson Nonato Da Silva ◽  
Aline Torquato Tavares ◽  
Cândida Pereira Da Silva ◽  
Tiago Alves Ferreira ◽  
João Victor Gonçalves Carline ◽  
...  
Keyword(s):  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Dry Mass ◽  
Mycorrhizal Colonization ◽  
University Campus ◽  
Experimental Station ◽  
Calophyllum Brasiliense ◽  
Shoot Mass ◽  
Different Levels ◽  
Forest Engineering

O experimento foi realizado na Estação Experimental de Engenharia Florestal do Campus Universitário de Gurupi, Universidade Federal do Tocantins (UFT), com objetivo de determinar a melhor dose de fósforo na presença de fungos arbusculares em mudas de guanandi (Calophyllum brasiliense Camb.) O delineamento experimental utilizado foi inteiramente casualizado com três repetições em esquema fatorial 6 x 2. Os tratamentos foram seis doses de fósforo (0; 400; 800; 1200; 1600 e 2000 g de P2O5 por m³) no substrato na presença e ausência de Fungos Micorrízos Arbusculares (FMAs). As características avaliadas foram altura das plantas, diâmetro do caule, massa seca da parte aérea (MSPA), massa seca da raiz (MSR), massa seca total (MST) e colonização micorrízica. Os diferentes níveis de adubação influenciaram a colonização micorrízica arbuscular. Nas doses 400 e 1600 g de fósforo por m3 de substrato observou-se maior porcentagem de colonização. A altura e o diâmetro das plantas foram significativamente afetados pela presença de P2O5. A massa seca da parte aérea e massa seca total não é afetada por doses de P2O5. O melhor desempenho das mudas de C. brasiliense ocorreu aos 90 dias com dose de 1.421 g de P2O5 por m3 de substrato.Palavras-chave: Calophyllum brasiliense Camb., adubação, micorrização. MYCORRHIZAL FUNGI AND PHOSPHORUS DOSES IN THE DEVELOPMENT OF GUANANDI SEEDLINGS ABSTRACT:The experiment was carried out at the Forest Engineering Experimental Station of the Federal University of Tocantins (UFT), University Campus of Gurupi, with the objective of determining the best dose of phosphorus in the presence of arbuscular fungi in guanandi (Calophyllum brasiliense Camb. The experimental design was completely randomized with three replicates in a 6 x 2 factorial scheme. The treatments were six doses of phosphorus (0, 400, 800, 1200, 1600 and 2000 g of P2O5 per m³) on the substrate in the presence and absence of Arbuscular mycorrhizal fungi (FMAs). The evaluated characteristics were plant height, stem diameter, shoot dry mass (MSPA), root dry mass (MSR), total dry mass (MST) and mycorrhizal colonization. The different levels of fertilization influenced arbuscular mycorrhizal colonization. At 400 and 1600 g of phosphorus per m3 of substrate, a higher percentage of colonization was observed. The height and diameter of the plants were significantly affected by the presence of P2O5. Dry shoot mass and total dry mass are not affected by P2O5 doses. The best performance of C. brasiliense seedlings occurred at 90 days with a dose of 1421 g of P2O5 per m3 of substrate.Keywords: Calophyllum brasiliense Camb., fertilization, mycorrhization. DOI:

Essential oil content and chemical composition of Cymbopogon citratus inoculated with arbuscular mycorrhizal fungi under different levels of lead

2015 ◽  
Vol 76 ◽  
pp. 734-738 ◽  
Author(s):  
Caroline Lermen ◽  
Fabrício Morelli ◽  
Zilda Cristiani Gazim ◽  
Adriana Pereira da Silva ◽  
José Eduardo Gonçalves ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Oil Content ◽  
Arbuscular Mycorrhizal ◽  
Cymbopogon Citratus ◽  
Different Levels

scholarly journals Phosphite and mycorrhizal formation in seedlings of three Australian Myrtaceae

2000 ◽  
Vol 48 (6) ◽  
pp. 725 ◽  
Author(s):  
Kay Howard ◽  
Bernie Dell ◽  
Giles E. Hardy
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Phytophthora Cinnamomi ◽  
Fold Increase ◽  
Native Plant ◽  
Negative Effects ◽  
Eucalyptus Marginata ◽  
Collar Rot ◽  
The Impact ◽  
Different Levels

Currently in Western Australia, phosphite is being used to contain the root and collar rot pathogen, Phytophthora cinnamomi, in native plant communities. There have been reports of negative effects of phosphite on arbuscular mycorrhiza (AM), so there are concerns that it may have a deleterious effect on other mycorrhizal fungi. Two glasshouse experiments were undertaken to determine the impact of phosphite on eucalypt-associated ectomycorrhizal fungi. In the first experiment, non-mycorrhizal seedlings of Eucalyptus marginata, Eucalyptus globulus and Agonis flexuosa were sprayed to runoff with several concentrations of phosphite, and then planted into soil naturally infested with early colonising mycorrhizal species. Assessments were made of percentage of roots infected with mycorrhizal fungi. There was no significant effect on ectomycorrhizal formation but there was a four-fold increase in AM colonisation of A. flexuosa roots with phosphite application. In the second experiment, E. globulus seedlings mycorrhizal with Pisolithus, Scleroderma and Descolea were treated with different levels of phosphite and infection of new roots by ectomycorrhizal fungi was assessed. There was no significant effect on ectomycorrhizal formation when phosphite was applied at the recommended rate (5 g L–1), while at 10 g L–1 phosphite significantly decreased infection by Descolea.

scholarly journals Role of arbuscular mycorrhiza fungi on tolerance to salinity of the tree legume Albizia lebbeck (L.) inoculated by Rhizobium

2014 ◽  
Vol 2 (01) ◽  
pp. 45-50 ◽  
Author(s):  
Gaurav Bhushan ◽  
Santosh Kr Sharma ◽  
Priyanka Sagar ◽  
Nishtha Seth ◽  
A. P. Singh
Keyword(s):  
Nitrogen Fixation ◽  
N2 Fixation ◽  
Mycorrhizal Fungi ◽  
Block Design ◽  
Protective Role ◽  
Tree Legume ◽  
Randomized Block Design ◽  
Acaulospora Laevis ◽  
Different Levels ◽  
Injurious Effects

Myrica esculenta (Myricaceae) and Syzygium cumini(Myrtaceae), the Indian traditional fruits The effect of different level of salinity on growth, nodulation and Nitrogen fixation of single and dual inoculated tree legumes which help arbascular mycorrhizal fungi (AMF) Acaulospora laevis Gerd. and Trappe with Rhizobium bacteria in the presence of different levels of salinity (concentration of NaCl) conducted in earthen pots in a completely randomized block design with three replications resulted in effective plant growth, shoot and root biomasses, nodulation and N2 fixation. The effect of different levels of salinity (concentration of NaCl) on growth, nodulation and N2 fixation of single (Rhizobium or AMF alone) and dual inoculated (Rhizobium + AMF ) tree legume has a pot culture experiment using The parameter growth , nodulation, nitrogen fixation and % AMF colonization of roots were considerable influenced with the increase in salt concentration from 0.5 % to 4.0 % NaCl. It was observed that the mycorrhizal tree legume (inoculated with the most preferred AMF Acaulospora laevis) performed better in the increasing levels of salinity in comparison to non-mycorrhozal ones. These investigations suggested a protective role play by AMF in providing resistance to the tree legume against injurious effects of salinity. Inoculation of efficient strain of AMF (Acaulospora laevis) during the course of study, prevented the injurious effects of salinity in the test plants due to enhanced water and sustainable nutrient uptake thereby promoting growth, nodulation and biogeochemical N2 cycle (fixation of nitrogen) of the tree legume under investigation.

scholarly journals Phosphorus fertilisation under nitrogen limitation can deplete soil carbon stocks – evidence from Swedish meta-replicated long-term field experiments

2015 ◽  
Vol 12 (19) ◽  
pp. 16527-16551 ◽  
Author(s):  
C. Poeplau ◽  
M. A. Bolinder ◽  
H. Kirchmann ◽  
T. Kätterer
Keyword(s):  
Mycorrhizal Fungi ◽  
Field Experiments ◽  
Net Primary Productivity ◽  
Crop Yields ◽  
Agricultural Soils ◽  
Heterotrophic Respiration ◽  
Different Levels ◽  
Soc Stocks ◽  
Term Field

Abstract. Increasing soil organic carbon (SOC) in agricultural soils can mitigate atmospheric CO2 concentration and also contribute to increase soil fertility and ecosystem resilience. The role of major nutrients on SOC dynamics is complex, due to simultaneous effects on net primary productivity (NPP) that influence crop residue carbon inputs and on the rate of heterotrophic respiration (carbon outputs). This study investigated the effect on SOC stocks of three different levels of phosphorus and potassium (PK) fertilisation rates in the absence of nitrogen fertilisation and of three different levels of nitrogen in the absence of PK. This was done by analysing data from 10 meta-replicated Swedish long-term field experiments (> 45 years). With N fertilisation, SOC stocks followed yield increases. However, for all PK levels, we found average SOC losses ranging from −0.04 ± 0.09 Mg ha−1 yr−1 (ns) for the lowest to −0.09 ± 0.07 Mg ha−1 yr−1 (p = 0.008) for the highest application rate, while crop yields as a proxy for carbon input increased significantly with PK fertilization by 1, 10 and 15 %. We conclude that SOC dynamics are mainly output-driven in the PK fertilised regime but mostly input-driven in the N fertilised regime, due to the much more pronounced response of NPP to N than to PK fertilisation. It has been established that P rather than K is the element affecting ecosystem carbon fluxes, where P fertilisation has been shown to: (i) stimulate heterotrophic respiration, (ii) reduce the abundance of arbuscular mycorrhizal fungi and (iii) decrease crop root : shoot ratio, leading to lower root-derived carbon input. The higher export of N in the PK fertilised plots in this study could (iv) have led to increased N mining and thus mineralisation of organic matter. More integrated experiments are needed to gain a better understanding of the relative importance of each of the above-mentioned mechanisms leading to SOC losses after P addition.

Plant growth and essential oil content of Mentha crispa inoculated with arbuscular mycorrhizal fungi under different levels of phosphorus

2015 ◽  
Vol 67 ◽  
pp. 103-107 ◽  
Author(s):  
Regiane Cristina Urcoviche ◽  
Zilda Cristiani Gazim ◽  
Douglas Cardoso Dragunski ◽  
Fernando Gomes Barcellos ◽  
Odair Alberton
Keyword(s):  
Essential Oil ◽  
Plant Growth ◽  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Oil Content ◽  
Arbuscular Mycorrhizal ◽  
Mentha Crispa ◽  
Different Levels
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