A Potent Phytotoxic Substance inAglaia odorataLour.

2016 ◽  
Vol 13 (5) ◽  
pp. 549-554 ◽  
Author(s):  
Hisashi Kato-Noguchi ◽  
Masahiko Suzuki ◽  
Kazutaka Noguchi ◽  
Osamu Ohno ◽  
Kiyotake Suenaga ◽  
...  
Keyword(s):  
Phytotoxic Substance

Isolation and identification of a phytotoxic substance in kiwifruit leaves

2018 ◽  
pp. 207-212 ◽  
Author(s):  
S. Okada ◽  
A. Iwasaki ◽  
I. Kataoka ◽  
K. Suenaga ◽  
H. Kato-Noguchi
Keyword(s):  
Isolation And Identification ◽  
Phytotoxic Substance

scholarly journals Suaveolic Acid: A Potent Phytotoxic Substance ofHyptis suaveolens

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
A. K. M. Mominul Islam ◽  
Osamu Ohno ◽  
Kiyotake Suenaga ◽  
Hisashi Kato-Noguchi
Keyword(s):  
Invasive Plant ◽  
Methanol Extract ◽  
Italian Ryegrass ◽  
Lepidium Sativum ◽  
Test Plant ◽  
Garden Cress ◽  
Aqueous Methanol ◽  
Isolation And Identification ◽  
Hyptis Suaveolens ◽  
Phytotoxic Substance

Hyptis suaveolens(Lamiaceae) is an exotic invasive plant in many countries. Earlier studies reported that the aqueous, methanol, and aqueous methanol extract ofH. suaveolensand its residues have phytotoxic properties. However, to date, the phytotoxic substances of this plant have not been reported. Therefore, the objectives of this study were isolation and identification of phytotoxic substances ofH. suaveolens. Aqueous methanol extract of this plant was purified by several chromatographic runs through bioassay guided fractionation using garden cress (Lepidium sativum) as a test plant. Final purification of a phytotoxic substance was achieved by reverse phase HPLC and characterized as 14α-hydroxy-13β-abiet-8-en-18-oic acid (suaveolic acid) by high-resolution ESI-MS,1H-,13C-NMR, CD, and specific rotation. Suaveolic acid inhibited the shoot growth of garden cress, lettuce (Lactuca sativa), Italian ryegrass (Lolium multiflorum), and barnyard grass (Echinochloa crus-galli) at concentrations greater than 30 µM. Root growth of all but lettuce was also inhibited at concentrations greater than 30 µM. The inhibitory activities were concentration dependent. Concentrations required for 50% growth inhibition of suaveolic acid for those test plant species were ranged from 76 to 1155 µM. Therefore, suaveolic acid is phytotoxic and may be responsible for the phytotoxicity ofH. suaveolensplant extracts.

Evaluation of phytotoxic activity of leaf and stem extracts and identification of a phytotoxic substance from Caesalpinia mimosoides Lamk.

2018 ◽  
Vol 30 (2) ◽  
pp. 129-139 ◽  
Author(s):  
Sutjaritpan Boonmee ◽  
Arihiro Iwasaki ◽  
Kiyotake Suenaga ◽  
Hisashi Kato-Noguchi
Keyword(s):  
Phytotoxic Activity ◽  
Phytotoxic Substance

Phytotoxic Substance from a Species of Penicillium

Science ◽  
1963 ◽  
Vol 140 (3565) ◽  
pp. 410-411 ◽  
Author(s):  
F. A. Norstadt ◽  
T. M. McCalla
Keyword(s):  
Phytotoxic Substance

THE PRODUCTION OF A PHYTOTOXIC SUBSTANCE BY ALTERNARIA ZINNIAE

1967 ◽  
Vol 45 (11) ◽  
pp. 2087-2090 ◽  
Author(s):  
G. A. White ◽  
A. N. Starratt
Keyword(s):  
Seed Germination ◽  
Pathogenic Fungus ◽  
Leaf Tissue ◽  
Leaf Veins ◽  
Weak Activity ◽  
Phytotoxic Compound ◽  
Phytotoxic Substance

A new phytotoxic compound, zinniol, C15H22O4, was isolated from cultures of the pathogenic fungus Alternaria zinniae. The toxin causes severe shrivelling of plant stems, browning of leaf veins, and chlorosis of surrounding leaf tissue. Zinniol inhibits seed germination and shows weak activity against fungi and bacteria.

2-Methoxystypandrone, a potent phytotoxic substance in Rumex maritimus L.

2017 ◽  
Vol 29 (4) ◽  
pp. 195-202 ◽  
Author(s):  
Md. Shafiqul Islam ◽  
Arihiro Iwasaki ◽  
Kiyotake Suenaga ◽  
Hisashi Kato-Noguchi
Keyword(s):  
Rumex Maritimus ◽  
Phytotoxic Substance

EFFECTS OF ROOT TEMPERATURE AND A SUSPECTED PHYTOTOXIC SUBSTANCE ON THE GROWTH OF ALFALFA

1970 ◽  
Vol 50 (3) ◽  
pp. 307-311 ◽  
Author(s):  
J. D. McELGUNN ◽  
D. H. HEINRICHS
Keyword(s):  
Soil Fertility ◽  
Differential Effect ◽  
Root Zone ◽  
Growth Chamber ◽  
Root Temperature ◽  
Suitable Temperature ◽  
Phytotoxic Effect ◽  
Growth Chambers ◽  
Phytotoxic Substance

Two alfalfa cultivars, Rambler and Alfa, were grown at two soil fertility levels to assess a phytotoxic effect of two soils on the growth of alfalfa in a growth chamber at three root-zone temperatures. Different root-zone temperatures (10, 15, and 20 C) produced no differential effect on the characteristic unthrifty growth of alfalfa and therefore cannot be recommended as a tool to aid in the assessment of the condition. However, best growth of herbage and roots occurred al 15 C, which appears to be the most suitable temperature for growth of alfalfa in growth chambers. Addition of fertilizer did not amend the phytotoxic soil effect and the two cultivars reacted in a near-equal manner to the condition.

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