Growth promotion of the seawater-irrigated oilseed halophyte Salicornia bigelovii inoculated with mangrove rhizosphere bacteria and halotolerant Azospirillum spp.

2000 ◽  
Vol 32 (4) ◽  
pp. 265-272 ◽  
Author(s):  
Y. Bashan ◽  
M. Moreno ◽  
E. Troyo
Keyword(s):  
Growth Promotion ◽  
Rhizosphere Bacteria ◽  
Salicornia Bigelovii

scholarly journals Combined Application of Rhizosphere Bacteria with Endophytic Bacteria Suppresses Root Diseases and Increases Productivity of Black Pepper (Piper nigrum L.)

Agriculture ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Sy Dinh Nguyen ◽  
Thi Huyen Trang Trinh ◽  
Trung Dzung Tran ◽  
Tinh Van Nguyen ◽  
Hoang Van Chuyen ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Endophytic Bacteria ◽  
Growth Promotion ◽  
Black Pepper ◽  
Rhizosphere Bacteria ◽  
Growth And Yield ◽  
Piper Nigrum ◽  
Bacillus Velezensis ◽  
Root Knot Nematode ◽  
Central Highland

Black pepper (Piper nigrum L.) is one of the most important crops and global demand continues to increase, giving it a high export value. However, black pepper cultivation has been seriously affected by a number of pathogenic diseases. Among them, “quick wilt” caused by Phytophthora sp., “slow decline” caused by Fusarium sp., and root-knot nematode Meloidogyne sp. have a serious negative effect on black pepper growth and productivity. There have been different chemical and biological methods applied to control these diseases, but their effectiveness has been limited. The aim of this research was to evaluate different combinations of rhizosphere bacteria and endophytic bacteria isolated from black pepper farms in the Central Highland of Vietnam for their ability to suppress pathogens and promote black pepper growth and yield. Formula 6, containing the strains Bacillus velezensis KN12, Bacillus amyloliquefaciens DL1, Bacillus velezensis DS29, Bacillus subtilis BH15, Bacillus subtilis V1.21 and Bacillus cereus CS30 exhibited the largest effect against Phytophthora and Fusarium in the soil and in the roots of black pepper. These bio-products also increased chlorophyll a and b contents, which led to a 1.5-fold increase of the photosynthetic intensity than the control formula and a 4.5% increase in the peppercorn yield (3.45 vs. 3.30 tons per hectare for the control). Our results suggest that the application of rhizosphere and endophytic bacteria is a promising method for disease control and growth-promotion of black pepper.

Role of Cytokinins in Plant Growth Promotion by Rhizosphere Bacteria

2005 ◽  
pp. 173-195 ◽  
Author(s):  
Ines E. de Garcia Salamone ◽  
Russell K. Hynes ◽  
Louise M. Nelson
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Rhizosphere Bacteria

Influence of soil biota on Douglas-fir (Pseudotsuga menziesii) seedling growth: the role of rhizosphere bacteria

1992 ◽  
Vol 70 (5) ◽  
pp. 1025-1031 ◽  
Author(s):  
C. P. Chanway ◽  
F. B. Holl
Keyword(s):  
Pseudotsuga Menziesii ◽  
Seedling Growth ◽  
Growth Promotion ◽  
Douglas Fir ◽  
Rhizosphere Bacteria ◽  
Soil Biota ◽  
Shoot Biomass ◽  
Growth Responses ◽  
Seedling Biomass ◽  
Sowing Seed

The influence of soil biota on Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedling growth was investigated by sowing seed collected from two ecologically distinct zones in British Columbia, Chilliwack and Williams Lake, in soil collected from the same two areas. Seedling biomass of both Douglas-fir ecotypes was greatest in unpasteurized soil collected from the same area as was the seed, but pasteurization negated this effect. In addition, Chilliwack seedlings responded specifically to biota present only in Chilliwack soil. To determine if rhizosphere bacteria were involved in these growth responses, bacteria were isolated from the rhizosphere of wild Douglas-fir seedlings collected from both locations, and putative growth promoting bacteria were selected in a screening experiment. Selected bacteria were then tested for seedling growth response specificity using a factorial design in which seed, soil, and bacteria from both locations were evaluated in all combinations. Inoculation of Douglas-fir seed with some of the selected bacterial isolates increased seedling biomass in pasteurized soil to a level similar to that of seedlings grown in unpasteurized soil, but there was no evidence that adaptive relationships involving bacteria, Douglas-fir, and the soil in which they naturally grew were important in effecting seedling growth promotion. However, Douglas-fir shoot biomass increased 39% and root biomass 68% after bacterial inoculation in some treatment combinations involving pasteurized soil. Key words: Douglas-fir seedlings, growth, rhizosphere bacteria.

An assessment of spruce growth response specificity after inoculation with coexistent rhizosphere bacteria

1992 ◽  
Vol 70 (12) ◽  
pp. 2347-2353 ◽  
Author(s):  
G. A. O'Neill ◽  
C. P. Chanway ◽  
P. E. Axelrood ◽  
R. A. Radley ◽  
F. B. Holl
Keyword(s):  
Seedling Growth ◽  
Soil Type ◽  
Growth Response ◽  
Growth Promotion ◽  
Geographic Origin ◽  
Rhizosphere Bacteria ◽  
Bacterial Strains ◽  
Seedling Biomass ◽  
Growth Promoting ◽  
Response Specificity

The influence of inoculation with rhizosphere bacteria on hybrid spruce (Picea glauca × engelmannii) seedling growth was investigated by isolating bacteria from the rhizosphere of naturally regenerating spruce seedlings collected from two ecologically distinct zones of British Columbia. Forty bacterial strains from spruce were screened in a seedling growth experiment, and several strains were shown to stimulate spruce seedling growth. The three most effective spruce growth promoting strains from each ecological zone were then tested in a seedling growth response specificity experiment in which seed, soil, and bacteria from both spruce ecosystems were examined in all possible treatment combinations, including pasteurized soil. Spruce seedling growth was primarily affected by seed and soil source (Salmon Arm > Mackenzie for both factors), and by soil pasteurization (pasteurized > unpasteurized). Significant growth effects due to bacterial treatment in the specificity experiment occurred only in pasteurized soil, but seedling biomass accumulation was stimulated by up to 59% in response to inoculation. There was no evidence of growth response specificity that was related to plant – bacteria adaptation within spruce ecotypes; two of the Mackenzie bacterial strains significantly inhibited growth of Mackenzie seedlings in Mackenzie soil, but two strains stimulated the growth of Salmon Arm seedlings, one in each soil type. Two Salmon Arm strains significantly stimulated growth of Mackenzie seedlings on Salmon Arm soil, and two strains stimulated the growth of Salmon Arm seedlings, one in each soil type. Seedling biomass was greater when treatments of spruce seed, soil, and rhizosphere bacteria that originated from the same geographic site were pooled and compared with treatments in which at least one factor originated from the other site. However, this effect was explained by the significant seed × soil interaction in the absence of bacteria; mean seedling biomass was greatest when spruce seed and soil treatments with the same geographic origin were pooled and compared with unrelated seed – soil combinations. Seedlings from pooled treatments were also significantly larger when bacteria and soil had a common geographic origin, but only when tested in pasteurized soil. Our results indicate that spruce growth promoting rhizosphere bacteria can be isolated from naturally regenerating spruce seedlings, but growth response variability was observed between trials. Seedling growth promotion by bacterial strains was not related to the use of spruce ecotypes, soil, and (or) rhizosphere bacteria with a common geographic origin. Key words: spruce seedlings, growth, inoculation, rhizosphere bacteria.

Rhizosphere Bacteria for Biocontrol of Bacterial Blight and Growth Promotion of Rice

Rice Science ◽  
2013 ◽  
Vol 20 (5) ◽  
pp. 356-362 ◽  
Author(s):  
Palaniyandi VELUSAMY ◽  
J. EBENEZAR IMMANUEL ◽  
Samuel S. GNANAMANICKAM
Keyword(s):  
Bacterial Blight ◽  
Growth Promotion ◽  
Rhizosphere Bacteria
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