Effect of Microbial Inoculants on Uptake of Nutrient Elements in Two Cultivars of Sunflower (Helianthus annuus L.) in Saline Soils

Abstract

A greenhouse experiment was conducted in order to evaluate the interactive effects of microbial inoculants on uptake of nutrient elements (N, P, K, Ca, Mg, Na, Cl, Fe, Zn, Cu, Mn) in two cultivars of sunflower. The trials were carried out on saline (EC = 7.6 dS m-1) calcareous soils taken from Eshtehard (Karaj) region of Iran. In a factorial trial and completely randomized design (CRD), three levels of arbuscular mycorrhizal inoculants (non inoculation, inoculation withGlomus etunicatum and Glomus intradices) and four levels of Pseudomonas fluorescensinoculants (non inoculation and inoculation with Pseudomonas fluorescens strains 4, 9, 12) in two cultivars of sunflower with four replications per treatments were applied. Results revealed that all of the treatments increased the N uptake in Euroflor cultivar. Moreover, in Euroflor cultivar, inoculation with Pseudomonas fluorescens strains 9 and co-inoculation of Pseudomonas fluorescens strains 4 and Glomus intradices made a significant different in phosphorous uptake, while did not make any significant change in the Master cultivar. However, bacterial and fungal treatments significantly (P < 0.05) increased uptake of micro nutrients such as Fe, Zn and Mn.

Application of Halotolerant Bacteria to Restore Plant Growth Under Salt Stress

“…Nevertheless, halotolerant bacteria can help to overcome the turbulence of nutrient uptake by restoration of phosphorus availability, and enrichment of rhizosphere with NO 3 -N (Ul-Hassan and Bano 2014 ). These bacteria also infl uence the uptake of nutrient elements (N, P, and K, Ca, Mg, Na Cl, Fe, Zn, Cu Mn) (Shirmardi et al 2010 ;Yildirim et al 2011 ;Jha and Subramanian 2013 ). The effects of coinoculation with P. fl uorescens and R. meliloti strains on nodulation and mineral uptake in alfalfa ( Medicago sativa ) clearly showed restoration of growth and only moderated negative effects of salt and signifi cantly increased plant growth by elevation of P and N and diminution of Na + in planta (Younesi et al 2013a ).…”

“…There are numerous and diverse, process of mitigation of salt stress in wheat seedlings by halotolerant bacteria (Nabti et al 2012 ;Ramadoss et al 2013 ), application of osmotolerant PGPR to ameliorate sodium chloride stress on tomato plants (Tank and Saraf 2010 ;Shen et al 2012 ), restoration of growth of salt-affected maize and soybean plants by application with osmotolerant rhizobacteria (Aly et al 2003 ;Naz et al 2009 ), the improvement of nutrient elements in sunfl ower under high salinity (Shirmardi et al 2010 ), and the increase of halotolerant growth of barley by the inoculation with novel halotolerant rhizobacteria (Cardinale et al 2014 ).…”

First Report of Providencia vermicola Strains Characterized for Enhanced Rapeseed Growth Attributing Parameters

“…Conversely, nonsignificant (P ≤ 0.05) effect of strain KP-21 on rapeseed root and shoot N contents may be due to lack of its diazotrophic nature. The results retrieved in number of other studies conclude that inoculation of PGPR strains enhance plant growth and productivity through nutrient aquisition and transport, and auxin biosynthesis (Igual et al, 2001;Chen et al, 2006;Shirmardi et al, 2010;Shahid et al, 2012;.…”

Microbial Inoculants for Soil Quality and Plant Health

“…According to (Shirmadi et al 2010) about 5 % of the world soil is currently affected salinity. Vinocur and Altman (2005), predicted that by the year 2050, about 50 % of agricultural soils will be affected by salinity increase.…”