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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : The Effectiveness of Entrophospora colombiana and Scutellospora sp. Associated with Soybean on Phosphate Solubilization) ผู้เขียน: ดร.ธงชัย มาลา, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe maximum yield of soybean (5.72 g plant-1) was obtained from plots treated with E. colombiana + TSP (triple superphosphate) at 30 kg P2O5 rai-. Application of TSP increased soybean yield but the enhancement of VAMF (Vesicular Arbuscular Mycorrhizal Fungi) on soybean growth was reduced. The enhancement of VAMF in RPP (rock phosphate from Petchabun) and RPK (rock phosphate from Kanchanaburi) was significantly greater than in TSP treatment. Increasing the level of phosphate fertilizer reduced VAMF enhancement. The promotion of plant yield by E.colombiana together with RPP at 10 kg P2O5 rai-1 was the greatest (2.63 g plant-1) whereas the minimum promotion (0.06 g plant-1) was found in Scutellospora sp. + TSP at 30 kg P2O5 rai-1. P uptake was highly correlated with plant yield and the r2 was 0.8984. The remaining available P and citrate soluble P were also highly correlated to each other at the r2 of 0.9989. E. colombiana could solubilize P from rock phosphate better than that of Scutellospora sp. The application of E. colombiana + RPP at 30 kg P2O5 rai-1 may be an appropriate option to reduce cultivation cost. VAMF could solubilize P from cheaper rock phosphate and release enough available P to promote soybean yield as much as 4.95 g plant-1 which was similar to the maximum yield of E. colombiana + TSP at 30 kg P2O5 rai-1 treatment. |
 ที่มา:วิทยาสารกำแพงแสนหัวเรื่อง:การคัดเลือกเชื้ออะโซสไปริลลัมที่มีประสิทธิภาพในการตรึงไนโตรเจน การสร้างออกซิน และละลายฟอสเฟต |
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ที่มา:TSB International Forum 2013หัวเรื่อง:- |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Plant Growth-Promoting Ability and N-acyl-homoserine Lactones Production by Siderophore-Producing Rhizobacteria) ผู้เขียน: หทัยรัตน์ แดงเจริญ, นายภาคภูมิ ตันเตชสาธิต, อาจารย์ , Siriluck Jitaksorn, Michael J. Sadowsky, ดร.กรรณิการ์ สัจจาพันธ์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractEighty bacterial isolates were obtained from the rhizosphere of sugarcane, corn, chili and watercress. Approximately 18% (15 of 80) of the tested isolates produced sideroderphore units in the range 31.8–79.9% when tested using chrome azurol sulphonate assay. The siderophore-producing bacteria were also tested for their ability to produce plant growth-promoting factors including auxin, gibberellic acid and the ability to solubilize phosphate. All of these isolates were able to solubilize tricalcium phosphate (Ca3(PO4)2) in the range 56.8–270.3 ?g.mL-1 and were able to produce auxin and gibberellin in the range 2.4–22.9 ?g.mL-1 and 185.5–246.4 ?g.mL-1, respectively. Isolates Su04, Su09, and Wa65 produced the greatest amount of siderophore units. Sequence analysis of 16S rRNA gene from the three best bacterial isolates (Su04, Su09 and Wa65) indicated that the strains were Burkholder cepacia, Pseudomonas boreopolis and Agrobacterium tumefaciens, with 99, 98 and 98% sequence similarity, respectively. Fifteen siderophore-producing bacteria were able to produce N-acyl-homoserine lactones (AHLs) in the range 62.9–660.9 Miller units, with isolate Su04 producing the greatest amount of AHLs (660.9 Miller units). AHLs production by isolates Su04, Wa63 and Wa65 rapidly increased when the culture was grown to the late log phase, after about 18 hr of incubation, and increased until the late stationary phase after about 36 hr. The study identified a series of siderophore-producing rhizobacteria able to solubilize phosphate and produce plant growth-promoting factors and AHLs which have potential for application as plant growth-promoting agents in agriculture. |
ที่มา:การประชุมวิชาการวิทยาศาสตร์และเทคโนโลยีแห่งประเทศไทย ครั้งที่ 36 (วทท 36)หัวเรื่อง:การแยกและศึกษาลักษณะของแบคทีเรียผลิตซิเดอร์โรฟอร์ |
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