Phytophthora cactorum

Polizzi G, La Rosa R, Arcidiacono C, D Emilio A (2003) Effects of innovative films in soil solar-ization for the control of soil-borne pathogens. Acta Hort (ISHS) 614 805-811 Porras M, Barrau C, Romero F (2007a) Effects of soil solarization and Trichoderma on strawberry production. Crop Prot 26 782-787. doi 10.1016/j.cropro.2006.07.005 Porras M, Barrau C, Arroyo FT, Santos B, Blanco C, Romero F (2007b) Reduction of Phytophthora cactorum in strawberry fields by Trichoderma spp. and soil solarization. Plant Dis 91 142-146. doi 10.1094/PDIS-91 -2-0142... 

Richards, J. B., Hemming, F. W. Dolichols, ubiquinones, geranylgeraniol and farnesol as the major metabolites of mevalonate in Phytophthora cactorum. Biochem. J. 128, 1345-1352 (1972). 

A layer of straw is placed beneath the strawberry plants to make sure that the fruits stay clean and to prevent the spread of grey rot and rhizome rot [Phytophthora cactorum). In addition the straw conserves soil moisture (this can also be a disadvantage), suppresses weeds and makes it easier to move around. The straw (80-100 kg/acre) is put down just before the fruits touch the soil. If this job is carried out before or during flowering, there is an increased risk of damage from late frost (because the soil is... 

In Phytophthora cactorum the polyprenols are all trans in the ubiquinones-8 and -9 (112) whereas dolichols-13 to -16 (113) all have three double bonds trans and the rest cis. This stereochemistry was shown in the usual way by the incorporation of tritium from [2- C,31 ,4/ - H]- and [2- C,3/ ,4S- H]-mevalonic acid. The incorporation of mevalonate into various polyprenols has been reported. Polyprenols are involved in bacterial cell-wall synthesis. Some of the enzymes involved in this process have been studied. 

Phytophthora cactorum Phytophthora infestans P. cinnanomi Pythium ultimum P. graminicola P. debaryanum Zoophagus insidians ... 

Figure 8. Growth curve (liquid media 50 ml in 250 ml flasks) of Phytophthora cactorum supplemented with 0.5 ppm of cholesterol at different times following inoculation and a control experiment set-up together with the cholesterol treatment. Cultures were Incubated at 20 C in the dark and seeded with a mycelial suspension previously grown in a sterol-free liquid media. The dry weights ranged by as much as 20 mg in mid to late log phase growth and 10 mg in early log and stationary phase growth.

Key to elicitors 1, 1,1-dimethylpiperidine 2, 2-diethylaminoethyl-3, 4-dichlorophenylether 3, 2-diethylaminoethyl-2, 4-dichlorophenylether 4, 2-diethylami-noethyl- 8-naphthylether S, 2-diethylaminoethyl-3, 4-dimethylphenylether 6, vanadyl sulfate 7, Pythium aphanidermatum homogenate 8, Rhodotorula rubra homogenate 9, 0.6 M mannitol 10, Phytophthora cactorum. 

Asada and Shuler 134) reported that autoclaved cultures of the mold Phytophthora cactorum resulted in a 60% increase in ajmalicine production. The response time to elicitor addition was less than 11 hr. 

Cedrela toona wood, linseed oil OH Phytophthora cactorum, bumblebees... 

W.D.Nes and A.E. Stafford, Evidence for metabolic and functional discrimination of sterols by Phytophthora cactorum. Proc. Natl. Acad. Sci. 80 3227 (1983). 

---