Alteration of oxidative metabolism in a potato tuber cell invaded by Phytophthora infestans and in the neighbouring tissues

Tomiyama, Kohei; Takakuwa, M.; Takase, N.; Sakai, Ryutaro

doi:10.1111/j.1439-0434.1960.tb04028.x

Cited by 17 publications

(9 citation statements)

References 12 publications

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“…Increased respiration is a typical response ofplants to infection (5,14), although these increases are low and inconsistent in potato tuber tissue infected with P. infestans (6,25 …”

Section: Resultsmentioning

confidence: 99%

Phenol Metabolism, Phytoalexins, and Respiration in Potato Tuber Tissue Treated with Fatty Acid

Maina¹,

Allen²,

Bhatia³

et al. 1984

Plant Physiol.

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Potato (solnum tuberosum L. cv Katahdin) tuber discs treated with arachidonic acid become necrotic and accumulate sesquiterpenoid phytoalexins. The arachidonic acid also causes increases in both phenylalanine ammonia lyase and lignin, but no change in total alcohol-soluble phenols. Linoleic acid does not alter any of these parameters. A high concentration of nonanoic acid promotes both necrosis and accumulation of low levels of phytoalexins, but decreased levels of phenols, phenylalanine ammonia lyase, and lignin. The respiration of the control discs and those treated with linoleic acid declines by 24 hours after treatment, but the respiration of arachidonic acid-treated discs remains constant for at least 48 hours.Plants often respond to attempted fungal invasion by synthesizing toxic metabolites called phytoalexins (12,22 (3,24).In this paper, we have extended the studies ofarachidonic acid by investigating the effect of this fatty acid on both phenol metabolism and respiration in potato tuber tissue. In addition, we include data on the effect on nonanoic acid treatments because this fatty acid has been reported to cause necrosis of plant tissues (15, 20), although it is not known to be an elicitor of phytoalexins. MATERIALS AND METHODSChemicals. Arachidonic and linoleic acids (both 99%) and nonanoic acid (97-99%) were purchased from Sigma Chemical Co. Both stock and working solutions were prepared as previously described (21), except that the buffer was pH 7.0 rather than pH 5.5.Plant Materials. Tubers of white potato (Solanum tuberosum L. cv Katahdin) were obtained from field plantings at a West Virginia University Agricultural and Forestry Experiment Station farm. They were stored at 4°C for 8 to 10 months and removed from cold storage 1 d before use. Discs (2 mm x 1 cm) were cut from the pith area of these tubers, rinsed in distilled H20, and incubated in Petri dishes at 20°C for 24 h.The aged potato discs were immersed for 7 min in buffer as control, or buffer containing one of the fatty acids and then incubated at 20C in Petri dishes or, when tissue respiration was going to be measured, in respirometer flasks. At the end of the incubation period, the extent of necrosis was estimated visually, and the discs were used immediately for respiration or PAL assays, or stored at -80°C for later analyses.Phytoalexins. The phytoalexins rishitin and lubimin were determined after homogenizing the entire potato discs by the method of Henfling and Kuc (10).Phenylalanine Ammonia Lyase. A crude preparation of PAL was made (11) and the enzyme was then assayed by the method of Zucker (30) except that the buffer was Tris-HCl rather than borate.Phenols. The potato discs were extracted with ethanol in absence of reducing agent by the method of Khanna et al. (13) and the extracted phenols were then assayed by the colorimetric procedure of Swain and Hillis (23).Lignin. Potato tuber discs were thinly sectioned with a razor blade and 1 g of tissue was then shaken with 20 ml of methanol for 1 h. The sample was centrifuge...

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“…Increased respiration is a typical response ofplants to infection (5,14), although these increases are low and inconsistent in potato tuber tissue infected with P. infestans (6,25 …”

Section: Resultsmentioning

confidence: 99%

Phenol Metabolism, Phytoalexins, and Respiration in Potato Tuber Tissue Treated with Fatty Acid

Maina¹,

Allen²,

Bhatia³

et al. 1984

Plant Physiol.

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show abstract

“…Fried et al ( 10) and others (7,8,9,11,12,16,17,19) have employed the treatment of enzyme kinetics used by Eadie (5) andl Hofstee (15) uptake (lata kinetically. The kinetic equation is as follows:…”

mentioning

confidence: 99%

Alteration of Oxidative Enzymes in Potato Tuber Tissue by Infection with Phytophthora infestans

Tomiyama

Stahmann

1964

Plant Physiol.

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“…Similarly, oxygen uptake of potato tuber tissue increased after infection by Phytophthora infestans. The increase in oxygen uptake was most rapid in the infected resistant varieties (183,184) ; it gradually extended more deeply in susceptible tissue. Inocula tion of cut surfaces of potato tubers with P. infestans, or treatment with pectinase, resulted in increased polyphenoloxidase activity in the host.…”

Section: Respiration Enzyme Activity and Proteinsmentioning

confidence: 96%

Resistance of Plants to Infectious Agents

Kuć¹

1966

Annu. Rev. Microbiol.

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Alteration of oxidative metabolism in a potato tuber cell invaded by Phytophthora infestans and in the neighbouring tissues

Cited by 17 publications

References 12 publications

Phenol Metabolism, Phytoalexins, and Respiration in Potato Tuber Tissue Treated with Fatty Acid

Phenol Metabolism, Phytoalexins, and Respiration in Potato Tuber Tissue Treated with Fatty Acid

Alteration of Oxidative Enzymes in Potato Tuber Tissue by Infection with Phytophthora infestans

Resistance of Plants to Infectious Agents

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