Growth and yield responses of a Nepalese spring wheat cultivar to the inoculation with Nepalese Azospirillum spp at various levels of nitrogen fertilization

Bhattarai, Tribikram; Heß, Dieter

doi:10.1007/s003740050345

Cited by 10 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…) SLA (cm 2 g -1 ) LAR (m 2 kg -1 ) NAR (g m -2 day -1 ) RGR (mg g -1 than using VS9, which coincide with previous investigations where the following were reported: 1) the combination of Azospirillum strains and medium fertilizer N dose improved N uptake by plants (Bhattarai and Hess 1998;Gadagi et al 2004) and 2) under low fertilizer application, the ACC deaminase activity of PGPR improved the effectiveness of nitrogen organic fertilization in tomato plants (Tahir et al 2006;Shaharoona et al 2008).…”

Section: Discussionsupporting

confidence: 90%

“…The stimulatory effect of Azospirillum has been attributed to several mechanisms that eventually increase plant yield, including its ability to produce various phytohormones (indole-3-acetic acid, zeatin, gibberellic acid, abscisic acid, ethylene) and important bioactive molecules (putrescine, spermine, spermidine, cadaverine), to fix biological nitrogen, and to enhance water and mineral uptake by plants (Dobbelaere et al 2001;Perrig et al 2007). Azospirillum inoculation improves plant growth in the presence of optimum and medium doses of nitrogenous fertilizers (Kapulnik et al 1981;Bhattarai and Hess 1998;Gadagi et al 2004). In tomato (Lycopersicon esculentum L.) plants inoculated with Azospirillum, increases in length, volume and biomass of root, number of leaves, stem diameter, shoot height and plant biomass have been documented (Bashan 1989;Terry et al 2005;Ribaudo et al 2006).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Azospirillum lipoferum strain AZm5 containing 1-aminocyclopropane-1-carboxylic acid deaminase improves early growth of tomato seedlings under nitrogen deficiency

et al. 2010

View full text Add to dashboard Cite

In this study we evaluated the ability of two wild strains of Azospirillum, A. lipoferum AZm5 and A. brasilense VS9, to produce ACC deaminase. We tested the effects of a deficiency and medium doses of nitrogenous fertilizers on the growth and physiology of tomato plants (Lycopersicon esculentum Mill cv. ACE VF55) inoculated with both Azospirillum strains independently. Tomato plants were evaluated by root elongation assay and grown in pot soil culture with different nitrogen levels (0 kg N ha -1 and 170 kg N ha -1 ). The root:shoot ratio (R:S) and some ecophysiological traits were determined after 42 days of plant growth. Results showed very different physiological characteristics in both strains. We found three relevant aspects related to the AZm5 strain: it produces high amounts of cytokinins, it contains the gene acdS, which encodes ACC deaminase, and it promotes plant growth. We conclude that AZm5 maybe useful to increase N uptake in N-deficient soil by production of cytokinins and the promotion of ACC deaminase activity, which favored leaf expansion and higher leaf N investment. Therefore, for tomato culture, a simultaneous biofertilization with AZm5 and a relatively low fertilization with N (170 kg N ha -1 ) to promote AZm5 activity could be advantageous.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Azospirillum lipoferum strain AZm5 containing 1-aminocyclopropane-1-carboxylic acid deaminase improves early growth of tomato seedlings under nitrogen deficiency

et al. 2010

View full text Add to dashboard Cite

show abstract

“…The increasing of LWP, LRT, SLA and LAR values due to the treatment of NFB+PDB+SB may be attributed to the increasing of the nutritional elements in the rooting zone, and consequently the absorption of more nutrients. The beneficial effects of microorganisms on rhizosphere intensification, N2-fixing potential, plant growth substances production and antimicrobial substances production that could be useful against pathogenic microorganisms were previously mentioned (Bhattarai and Hess (1998). Zhang et al, (1996) suggested that Serratia stimulate soybeans growth through the production of plant growth regulating compound, which stimulate nitrogen fixation by stimulating over-all plant vigor and growth, resulting in a subsequent increase in nitrogen fixation.…”

Section: I2 Fresh and Dry Weights As Well As Specific Leaf Weight (Slw) And Leaf Weight Ratio (Lwr)mentioning

confidence: 99%

Morphological and Anatomical Studies on Potatoes as Affected by Bio-and Mineral Fertilizers

Helaly

Fouda

Ramadan

2009

Journal of Plant Production

View full text Add to dashboard Cite

Plant height, number of branches and leaves per plant, leaf area, fresh and dry weights of the shoot system, specific leaf weight (SLW), leaf weight ratio (LWR), specific leaf area (SLA) and leaf area ratio (LAR), estimated at the active growth period; after 90 days from planting, were decreased due to decreasing NPK dose less than the recommended one during the two growing seasons. Bio-fertilizers used, over all NPK doses, counteracted, in general the depressing effect of NPK stresses on most growth parameters studied. The most effective strain restoring most of the plant growth capacity was found with NFB when used individually or in combination with the others.The anatomical structure, of the terminal leaflet blade, taken from the 3 rd compound leaf from the plant tip, taken at the middele part indicated that NPK stress decreased thickness leaflet in the midrib region, mesophyll tissue, palisade tissue and spongy tissue . Midrib V.B. dimension (length and width), as well as thickness of xylem tissue and phloem tissue at the midrib bundle (external and internal) and metaxylem vessel dimension were also decreased. The most striking effects were found with respect to components of the vascular system.The inoculation of bacterial strains used counteracted the depressing effects of NPK stresses on all these parameters. The most effective treatments were found with NFB+PDB+SB, NFB+PDB, NFB+SB, NFB alone in a descending order.The stem structure at the 3 rd internode of the main stem of potato plants as seen in T.S. indicated that stem diameter, cortex thickness, large vascular bundle dimension, external and internal phloem and xylem tissue thickness as well as pith tissue dimension were decreased due to NPK stress compared with the recommended one. All bacterial inoculation treatments counteracted the reduction in cell volume caused by NPK stress and increased stem diameter, cortex thickness, large vascular bundle dimension, external and internal phloem and xylem tissue thickness as well as pith tissue dimension. Metaxylem vessel dimension was also increased. Inoculation with NFB alone as well as inoculation with either NFB+PDB or mixed strains (NFB+PDB+SB) were generally the best treatment compared with plants grown without inoculation under any NPK doses.

show abstract

“…Dobbelaere et al (1999) verificaram aumento nos pêlos radiculares de plantas de trigo decorrente de auxinas secretadas por Azospirillum sp. Além disso, Bhattarai & Hess (1998) concluíram que, ao lado da FBN, o efeito de estimulação do crescimento pela bactéria no desenvolvimento das raízes, nos primeiros estádios de crescimento da planta, pode ser responsável pelo impacto positivo da inoculação em trigo.…”

Section: Interação Entre Genótipos De Trigo E Bactérias Diazotróficasunclassified

Ocorrência e efeito de bactérias diazotróficas em genótipos de trigo

Sala

Freitas

Donzeli

et al. 2005

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

Growth and yield responses of a Nepalese spring wheat cultivar to the inoculation with Nepalese Azospirillum spp at various levels of nitrogen fertilization

Cited by 10 publications

References 24 publications

Azospirillum lipoferum strain AZm5 containing 1-aminocyclopropane-1-carboxylic acid deaminase improves early growth of tomato seedlings under nitrogen deficiency

Azospirillum lipoferum strain AZm5 containing 1-aminocyclopropane-1-carboxylic acid deaminase improves early growth of tomato seedlings under nitrogen deficiency

Morphological and Anatomical Studies on Potatoes as Affected by Bio-and Mineral Fertilizers

Ocorrência e efeito de bactérias diazotróficas em genótipos de trigo

Contact Info

Product

Resources

About