Detail of "520-32-1"

Reference

Isolation, characterization and activity of phytotoxic compounds from quackgrass [Agropyron repens (L

Isolation, characterization and activity of phytotoxic compounds from quackgrass [Agropyron repens (L.) Beauv.]. Weston, Leslie A.; Burke, Basil A.; Putnam, Alan R. (Dep. Hortic. Landscape Archit., Univ. Kentucky, Lexington, KY 40546, USA). J. Chem. Ecol., 13(3), 403-21 (English) 1987. CODEN: JCECD8. ISSN: 0098-0331. DOCUMENT TYPE: Journal CA Section: 11 (Plant Biochemistry) Section cross-reference(s): 4 Previous expts.There are some reagents with their cas registry numbers 520-32-1 and 76900-87-3 are used in this study. showed that legumes grown in the presence of living or herbicidally treated quackgrass or exts. exhibited reduced seedling root and shoot growth and decreased nodulation and N fixation. Aq. exts. of quackgrass shoots were most inhibitory to plant growth. Upon sequential partitioning of an aq. ext. of quackgrass shoots, the ether ext. possessed the most activity and caused 50% redns. in radicle elongation of 8 crop and weed species at <240 mg/mL (small-seeded species) and 100 mg/mL (large-seeded species). Snapbeans (Phaseolus vulgaris Bush Blue Lake) growth aseptically in agar contg. an ether ext. at 100 and 200 mg/mL exhibited severe root browning, lack of root hair formation, and a 2-3-fold redn. in root and shoot dry wts. The ether ext. of quackgrass shoots had no inhibitory effect on the growth of 4 Rhizobium species in Petri dishes or 2 species in broth culture. Inhibitors present in the ether ext. may influence the legume-Rhizobium symbiosis indirectly by reducing legume root growth hair formation. The ether ext. of quackgrass shoots was sepd. using high-pressure liq., thin-layer, and liq. column chromatog. in an attempt to isolate and identify the inhibitors responsible for the inhibition of seedling growth. Two closely related flavonoid inhibitors were isolated from the ether ext. One was identified as 5,7,4'-trihydroxy-3',5'-dimethoxyflavone (tricin). Both flavonoids caused 50% inhibition of radicle elongation in cress (Lepidium sativum Burpee curly) seeds at <125 mg/mL. Both flavonoids were found in ether exts. of quackgrass shoots and rhizomes, but the largest amts. of both compds. occurred in quackgrass shoots collected from the field. .

Luteolin 6-C-b-ristobioside from Poa annua

Luteolin 6-C-b-ristobioside from Poa annua. Rofi, Ricardo D.; Pomilio, Alicia B. 520-32-1 and 4261-42-1 are also occured in this study. (Fac. Cienc. Exactas Nat., Univ. Buenos Aires, Buenos Aires 1428, Argent.). Phytochemistry, 26(3), 859-60 (English) 1987. CODEN: PYTCAS. ISSN: 0031-9422. DOCUMENT TYPE: Journal CA Section: 11 (Plant Biochemistry) Section cross-reference(s): 33 A new glycoflavone, luteolin 6-C-(2''-O-a-D-mannosyl-b-D-glucoside), was characterized from whole plants of P. annua. .