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Microbial Metabolism of Herbicide Pentoxazone (part 3)
Kouji SATSUMA, Osamu HAYASHI, Kiyoshi SATO, Kazutoshi OHYAMA, Shin-ich ...
2000 Volume 25 Issue 4 Pages
357-364
Published: November 20, 2000
Released on J-STAGE: August 05, 2010
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Five microbial strains which have pentoxazone [3-(4-chloro-5-cyclopentyloxy-2-fluorophenyl)-5-isopropylidene-1, 3-oxazolidine-2, 4-dione]-transforming abilities were isolated from Ushiku paddy field soil. These strains, designated as 1B, 2B, 7B, 21B and 9A, have been tentatively identified by their morphological and physiological characteristics:
Pseudomonas fluorescens, Bradyrhizobium japonicum, two pathovars of
Xanthomonas oryzae and
Bacillus sp., respectively. These isolates favored or tolerated the lower oxygen concentration than air though they belong to aerobes. These isolates partly modified pentoxazone molecule to afford five different metabolites. Strains 1B and 2B produced A-0505 [
N-(4-chloro-5-cyclopentyloxy-2-fluorophenyl)-2-oxo-3-methylbutanamide]. Strain(s) 7B and 21B produced, respectively, A-0480 (4-chloro-5-cyclopentyloxy-2-fluoroaniline) and A-1374 [
N-(4-chloro-5-cyclopentyloxy-2-fluorophenyl)-2-hydroxy-3-methylbutanamide] after their transient accumulation of A-0505. Strain 9A produced two monohydroxylated compounds on cyclopentyl moiety: hydroxylated-pentoxazone and hydroxylated-A-0505. Strains 7B, 21B and 9A were able to transform A-0505 when it was provided as the initial substrate. This indicates that A-0505 could be a metabolic intermediate of these strains.
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Bun-ichi SHIMIZU, Asuka FUJIMORI, Hisashi MIYAGAWA, Tamio UENO, Ken WA ...
2000 Volume 25 Issue 4 Pages
365-372
Published: November 20, 2000
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The cuttings of morning glory seedlings (
Ipomoea tricolor cv. heavenly blue) were susceptible to
Fusarium oxysporum f. sp.
batatas (PF), and showed the typical fusarium wilt symptom. By using the reduction of chlorophyll content in cotyledons as the quantitative index of the disease symptom, we found that the pretreatment with the non-pathogenic isolate of
Fusarium (NPF;
F. oxysporum 101-2), which has been practically used as a biological control agent for fusarium wilt of sweet potato, suppresses the symptom significantly. Dead NPF bud-cells could not induce resistance. The supernatant of NPF culture after centrifugation at 15, 000×g for 20min, also induced resistance. The activity of the supernatant was lost by heating. The factor(s) associated with the induction of resistance was considered to be thermolabile chemical component(s) produced by NPF. This experimental model may be facile and useful for analyzing the chemical basis of the biological interaction among PF, morning glory and NPF.
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Noriyasu SAKAMOTO, Takao ISHIWATARI, Noritada MATSUO
2000 Volume 25 Issue 4 Pages
373-378
Published: November 20, 2000
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A series of [1(2
H), 2′-bipyridin]-2-one derivatives were synthesized and their Insecticidal activity against German cockroaches and houseflies was evaluated. The strength of activity varied markedly depending upon the substituents and their positions on the pyridone and the pyridine ring. Electronwithdrawing substituents at the 3, 3′, 5 and 5′-positions on both rings are required for the insecticidal activity, especially against German cockroaches. Furthermore, a couple of trifluoromethyl groups at the 5 and 5′-positions on both rings are essential for the activity. Among all compounds tested, a chlorine atom at the 3-position on the pyridone ring, and a chlorine atom, a fluorine atom or a trifluoromethyl group at the 3′-position on the pyridine ring were more preferable.
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Development of Time-Controlled Release Granule Containing Metominostrobin (Part 3)
Shigeru TASHIMA, Shinji SHIMADA, Kohei MATSUMOTO, Reiji TAKEDA, Tomono ...
2000 Volume 25 Issue 4 Pages
379-384
Published: November 20, 2000
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We investigated the effect of white carbon (hydrated silicon dioxide) contained in water insoluble polymer membrane on release profiles of metominostrobin from the time-controlled release granule (TCRG) containing metominostrobin. As the amount of white carbon increased, the lag time for release was shortened and the release rate became faster. Thus, the changes in both lag time and release rate were thought to be related to water permeability into the TCRG and tensile strength of the membrane induced by it. We also made a single regression model and a logistic model to predict release profile based on the amount of white carbon in TCRG using computer program NLIN procedure of SAS (Statistical Analysis Systems). As a result, the actual release profile fitted in a three parameter logistic model by non linear least-squares method.
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Byung Sup KIM, Eun Woo PARK, Kwang Yun CHO
2000 Volume 25 Issue 4 Pages
385-386
Published: November 20, 2000
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G. K. M. Mustafizur RAHMAN, Naoki MOTOYAMA
2000 Volume 25 Issue 4 Pages
387-391
Published: November 20, 2000
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Hiromichi YOSHIKAWA
2000 Volume 25 Issue 4 Pages
392-394
Published: November 20, 2000
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Shozo ENDO, Masaichi TSURUMACHI
2000 Volume 25 Issue 4 Pages
395-397
Published: November 20, 2000
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Tsuneo ICHIBA, Kinuko KUMANO, Hiromu KASHINO, Kenkichi NANBA, Akira MI ...
2000 Volume 25 Issue 4 Pages
398-401
Published: November 20, 2000
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Development of Time-Controlled Release Granule Containing Metominostrobin (Part 4)
Shigeru TASHIMA, Shinji SHIMADA, Motomu NIIKAWA, Kohei MATSUMOTO, Reij ...
2000 Volume 25 Issue 4 Pages
402-404
Published: November 20, 2000
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Tomoaki MORI, Ahmed S. A. MOHAMED, Masashi SATO, Toru YAMASAKI
2000 Volume 25 Issue 4 Pages
405-409
Published: November 20, 2000
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Ahmed S. A. MOHAMED, Tomoaki MORI, Syed. Q. ISLAM, Masashi SATO, Toru ...
2000 Volume 25 Issue 4 Pages
410-415
Published: November 20, 2000
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Kwang Yun CHO
2000 Volume 25 Issue 4 Pages
416-420
Published: November 20, 2000
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[in Japanese]
2000 Volume 25 Issue 4 Pages
421
Published: November 20, 2000
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Yasuo ISHII
2000 Volume 25 Issue 4 Pages
422-430
Published: November 20, 2000
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Tadayoshi SHIGEOKA
2000 Volume 25 Issue 4 Pages
431-434
Published: November 20, 2000
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[in Japanese], [in Japanese]
2000 Volume 25 Issue 4 Pages
435-437
Published: November 20, 2000
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Yukihiro SUGIMOTO
2000 Volume 25 Issue 4 Pages
438-440
Published: November 20, 2000
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Shigeo YOSHIDA
2000 Volume 25 Issue 4 Pages
441-445
Published: November 20, 2000
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Tadashi KATOH
2000 Volume 25 Issue 4 Pages
446-450
Published: November 20, 2000
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Shigefumi KUWAHARA
2000 Volume 25 Issue 4 Pages
451-455
Published: November 20, 2000
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Kinya OGAWA
2000 Volume 25 Issue 4 Pages
456-461
Published: November 20, 2000
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[in Japanese]
2000 Volume 25 Issue 4 Pages
463-467
Published: November 20, 2000
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Takashi MITSUI
2000 Volume 25 Issue 4 Pages
468-469
Published: November 20, 2000
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[in Japanese]
2000 Volume 25 Issue 4 Pages
470-472
Published: November 20, 2000
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2000 Volume 25 Issue 4 Pages
473-474
Published: November 20, 2000
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2000 Volume 25 Issue 4 Pages
475-476
Published: November 20, 2000
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2000 Volume 25 Issue 4 Pages
477-478
Published: November 20, 2000
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