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Humic Acids Isolated from Earthworm Compost Enhance Root Elongation, Lateral Root Emergence, and Plasma Membrane H+-ATPase Activity in Maize Roots1
Earthworms (Eisenia foetida) produce humic substances that can influence plant growth by mechanisms that are not yet clear. In this work, we investigated the effects of humic acids (HAs) isolatedExpand
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Improved methodology for isolation of Acetobacter diazotrophicus and confirmation of its endophytic habitat
Nitrogen-free, semi-solid defined medium with crystallized cane sugar (100 g/l) supplemented with cane juice (5 ml/l) was the most selective for isolating Acetobacter diazotrophicus. Surveys of A.Expand
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Infection and colonization of rice seedlings by the plant growth-promoting bacterium Herbaspirillum seropedicae Z67.
A beta-glucoronidase (GUS)-marked strain of Herbaspirillum seropedicae Z67 was inoculated onto rice seedling cvs. IR42 and IR72. Internal populations peaked at over 10(6) log CFU per gram of freshExpand
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Emended description of Herbaspirillum; inclusion of [Pseudomonas] rubrisubalbicans, a milk plant pathogen, as Herbaspirillum rubrisubalbicans comb. nov.; and classification of a group of clinical
[Pseudomonas] rubrisubalbicans, a mild plant pathogen. Herbaspirillum seropedicae, and EF group 1 strains (clustered by an immunological method) were investigated by a polyphasic approach withExpand
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Infection of sugar cane by the nitrogen-fixing bacterium Acetobacter diazotrophicus
Significant nitrogen fixation has recently been demonstrated in Brazilian sugar cane (Saccharum officinarum) cultivars known to form associations with a number of diazotrophs, including AcetobacterExpand
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Humic and fulvic acids as biostimulants in horticulture
Abstract Maintaining food production for a growing world population without compromising natural resources for future generations represents one of the greatest challenges for agricultural science,Expand
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Infection and Colonization of Sugar Cane and Other Graminaceous Plants by Endophytic Diazotrophs
Agriculturally important grasses such as sugar cane (Saccharum sp.), rice (Oryza sativa), wheat (Triticum aestivum) sorghum (Sorghum bicolor), maize (Zea mays), Panicum maximum, Brachiaria spp., andExpand
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Physiological responses to humic substances as plant growth promoter
Humic substances (HS) have been widely recognized as a plant growth promoter mainly by changes on root architecture and growth dynamics, which result in increased root size, branching and/or greaterExpand
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Nitric oxide mediates humic acids-induced root development and plasma membrane H+-ATPase activation
It is widely reported that some humic substances behave as exogenous auxins influencing root growth by mechanisms that are not yet completely understood. This study explores the hypothesis that theExpand
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Further observations on the interaction between sugar cane and Gluconacetobacter diazotrophicus under laboratory and greenhouse conditions.
Sugar cane (Saccharum spp.) variety SP 70-1143 was inoculated with Gluconacetobacter diazotrophicus strain PAL5 (ATCC 49037) in two experiments. In experiment 1 the bacteria were inoculated into aExpand
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