Effect of Trichoderma on soil phosphate solubilization and growth improvement of Avicennia marina

Saravanakumar, Kandasamy; Arasu, V. Shanmuga; Kathiresan, K.

doi:10.1016/j.aquabot.2012.09.001

Cited by 99 publications

(46 citation statements)

References 20 publications

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“…The treatment with Trichoderma strain FR-NST-009 gave the lowest final pH (4.68), followed by CB-Pin-01 (5.00), FR-NST-353 (5.12), RB-NST-003 (5.98), and RB-NST-028 (6.42), while the final pH in control treatment was 7.26 (Table 1). The pH drop in PSM broth cultures has been reported in several researches which supports the pH change in the present study (Vazquez et al, 2000;Alam et al, 2002;Rashid et al, 2004;Pradham & Sukla, 2005;Akintokun et al, 2007;Kapri & Tewari, 2010;Yadav et al, 2011;Saravanakumar et al, 2013).…”

Section: Testing Of Phosphate Solubilization In Vitrosupporting

confidence: 70%

“…This study indicated that Trichoderma species have the ability to solubilize insoluble phosphate into soluble phosphate. Phosphate solubilization by Trichoderma species have been reported in a few researches (Akintokun et al, 2007;Kapri & Tewari, 2010;Saravanakumar et al, 2013). Values in the same column followed by the same alphabet are not significantly different from each other as analyzed by Duncan's Multiple Range Test at P < 0.05.…”

Section: Testing Of Phosphate Solubilization In Vitromentioning

confidence: 96%

“…Additionally, Yadav et al (2011) showed that T. harzianum significantly enhanced the shoot length (61.56%), root length (69.95%), shoot dry weight (38.71%), and root dry weight (57.58%) of chickpea as compared with the control. Moreover, Saravanakumar et al (2013) Windham et al (1986) reported that Tricoderma species produced growth regulating factors, which enhanced seed germination and plant growth. Baker (1988) reported that such increases in plant growth and development may result from control of minor pathogens or increased nutrient uptake through enhanced root growth and promoted the availability of necessary nutrients.…”

Section: Testing Of Phosphate Solubilization In Vivo (Under Greenhousmentioning

confidence: 99%

“…Other mechanisms include lowering of pH as a result of acid production, and ion chelation and exchange reaction (Akintokun et al, 2007). Additionally, phosphate solubilization of Trichoderma species may be occurred from phosphatase and phytase enzyme activity (Kapri & Tewari, 2010;Saravanakumar et al, 2013).…”

Section: (2009) Trichoderma Species Including T Harzianum T Aspermentioning

confidence: 99%

“…Phosphate concentration in the supernatant was estimated by spectrophotometric method (Fiske & Subbarow, 1925;Saravanakumar et al, 2013). …”

Section: Strains Of Trichoderma Speciesmentioning

confidence: 99%

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The role of Trichoderma species as phosphate solubilizing microorganism was studied in vitro, by means of the Modified Pikovskaya's Broth medium (MPB) and in vivo, under greenhouse conditions using Rock Phosphate (RP) as a source of phosphorus (P). In broth medium, Trichoderma strain FR-NST-009 gave the highest P-solubilization (80.25%), followed by FR-NST-353 (77.51%), CB-Pin-01 (66.91%), RB-NST-028 (46.05%), and RB-NST-003 (21.20%) as compared with a control (broth medium non-inoculated with Trichoderma strain) after incubation at room temperature (27 ± 2 o C) for 7 days. In addition, the treatments with Trichoderma species provided the final pH of broth culture lower than the control. Three kinds of organic acids including citric acid, lactic acid and succinic acid were detected by High Performance Liquid Chromatography (HPLC) in all treatments inoculated with Trichoderma strain. Trichoderma species produced citric acid in higher than lactic acid and succinic acid. Production of organic acids by Trichoderma species is one of the mechanisms for phosphate solubilization. In greenhouse conditions, at 60 days after planting, the treatments with Trichoderma strain FR-NST-009+RP provided the percentage of available phosphorus increasing more than the control 1 (with only RP) to 14.91%. However, after 60 days, the available phosphorus in the planting medium continually decreased in all treatments. At 180 days after planting, the treatments with FR-NST-009+RP increased plant height (22.19%), stem circumference (13.81%), leaf number (71.43%), total phosphorus in the rubber tree leaves (18.90%), shoot fresh weight (43.95%), root fresh weight (19.36%), shoot dry weight (39.96%), and root dry weight (21.13%), as compared with the control 1 (with only RP) Furthermore, the treatments with FR-NST-009+RP provided the population of Trichoderma species in the planting medium with 1.78 × 10 5 Colony-Forming Units (CFU) per gram planting medium and gave the root colonization percentages with 100.00%. The selected indigenous strain, FR-NST-009 was Trichoderma harzianum identified by using morphological characteristics.

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