Oxidation of Paraffins by Plant Tissues

Kolattukudy, P. E.

doi:10.1104/pp.44.2.315

Cited by 16 publications

(5 citation statements)

References 16 publications

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“…Many workers have reported toxicity of crude oil where it penetrates the embryos. Baker (1970b), Kolattukudy (1979) and Gill et al (1992) have separately provided evidence in support of possible penetration of crude oil into plant tissues and cells. They maintained that the embryo of a seed could be injured or killed if it comes into contact with crude oil.…”

Section: Resultsmentioning

confidence: 98%

Performance ofDacryodes edulis(Don. G. Lam H. J.) Seeds and Seedlings in a Crude Oil Contaminated Soil

Agbogidi

2006

Journal of Sustainable Forestry

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Environmental pollution from oil activities in a major oil producing country like Nigeria is inevitable. Studies on the effects of crude oil contamination on forest tree species is vital because of the great deal of crude oil spillage in the coastal regions of Nigeria. This paper evaluates the performance of Dacryodes edulis seeds and seedlings in a crude oil contaminated soil in Asaba, Delta State, Nigeria. Four crude oil concentrations (% by weight) in soil constituted treatments. These were 0.00%, 2.07%, 4.15% and 6.23% by weight per 1.3 kg weight of the soil samples. A randomized complete block design (RCBD) was adopted with three replicates. The results showed that oil concentrations of 4.15% and 6.23% adversely affected percent (%) germination (62.33% and 37.67%) and performance of D. edulis seedlings in terms of plant height, number of leaves, leaf area, collar girth and dry mass at the 5% probability level. The study shows that crude oil pollution has a highly significant effect on the germination and seedling growth of this locally available multi-purpose forest fruit tree species. This further suggests that D. edulis can serve as bio-indicator of pollution in oil-producing areas of the Niger Delta. The present study has important implications for restoration of degraded areas.

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Section: Resultsmentioning

confidence: 98%

Performance ofDacryodes edulis(Don. G. Lam H. J.) Seeds and Seedlings in a Crude Oil Contaminated Soil

Agbogidi

2006

Journal of Sustainable Forestry

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“…Plant tissues are known to be able to oxidize wax components such as hy drocarbons and incorporate the fatty acids derived from them into cellular lipids (Kolattukudy, 1969b;Hardman and Brain, 1971). Wax components applied to leaf surfaces undergo metabolic interconversions (Kolattukudy and Liu, 1970;Cassagne and Lessire, 1975).…”

Section: A Degradation Of Waxesmentioning

confidence: 99%

Cutin, Suberin, and Waxes

Kolattukudy¹

1980

Lipids: Structure and Function

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130

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“…In microorganisms grown on fatty alcohols or alkanes as the sole carbon source, the fatty alcohols go through two oxidative enzymic reactions each of which utilizes NAD as the coenzyme (9,15). Conversion of hexadecane to hexadecanoic acid has also been demonstrated in leaf slices (14). If the two enzymes are present in the jojoba cotyledon, they may be localized in the wax bodies or in the glyoxysomes.…”

Section: Plant Materials Seeds Of Jojoba (Simmondsia Chinensismentioning

confidence: 99%

Gluconeogenesis from Storage Wax in the Cotyledons of Jojoba Seedlings

Moreau

Huang²

1977

Plant Physiol.

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The cotyledons of jojoba (Simmondsia chinensis) seeds contained 50 to 60% of their weight as intraceilular wax esters. During germination there was a gradual decrease in the wax content with a concomitant rise in soluble carbohydrates, suggesting that the wax played the role of a food reserve. Thin layer chromatography revealed that both the fatty alcohol and fatty acid were metabolized. The disappearance of wax was matched with an increase of catalase, a marker enzyme of the glnconeogenic process in other fatty seedlings. Subcellular organelles were isolated by sucrose gradient centrifugation from the cotyledons at the peak stage of germination. The enzymes of the .8 oxidation of fatty acid and of the glyoxylate cyde were localized in the glyoxysomes but not in the mitochondrin. The glyoxysomes had specific activities of individual enzymes similar to those of the castor bean glyoxysomes. An active alkaline lipase was detected in the wax bodies at the peak stage of germination but not in the ungerminated seeds. No lipase was detected in glyoxysomes or mitochondria. After the wax in the wax bodies had been extracted with diethyl ether, the organelle membrane was isolated and it stifl retained the alkaline lipase. The gluconeogenesis from wax in the jojoba seedling appears to be similar, but with modification, to that from triglyceride in other fatty seedlings.The jojoba plant is native to arid regions of southwestern North America. It may be a unique member of the plant kingdom, in that it is the only known plant whose seeds contain a large amount (50-60% of the fresh weight) of intracellular wax esters in the cotyledons (18,19,21,27). The industrial application of the seed wax is being actively explored since its chemical structure is very similar to the oil of the sperm whale. Agricultural programs have been started in an attempt to establish a high productivity of the seeds (26). On the other hand, the physiology of the seed wax has not been previously studied. The jojoba seed may be a useful system for the study of wax metabolism in higher plants since during seed development and germination, wax metabolism should be very active. In this paper, we establish the role of the jojoba wax as a food reserve for germination and elucidate the gluconeogenic process from wax in the jojoba seedling. carried out in moist vermiculite in darkness at 28 C. In the germination study, plant materials were carefully selected for uniformity. Only those seeds weighing between 0.5 and 0.7 g were used. At 5-day intervals, seedlings were selected by both chronological age and hypocotyl length. Seedlings with the following hypocotyl length were used: day 0 (dry seed), day 5 (0.1-1 cm radical), day 10 (6-8 cm), day 15 (10-12 cm), day 20 (13-15 cm), day 25 (16-21 cm), and day 30 (22-30 cm).Compositional Analysis. Five seedlings from each growth stage were separated into cotyledons and embryonic axes. The fresh weights were recorded. The cotyledons were ground in icecold methanol in the ratio of 1:10 (w/v) for 10 min at high spe...

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Oxidation of Paraffins by Plant Tissues

Cited by 16 publications

References 16 publications

Performance ofDacryodes edulis(Don. G. Lam H. J.) Seeds and Seedlings in a Crude Oil Contaminated Soil

Performance ofDacryodes edulis(Don. G. Lam H. J.) Seeds and Seedlings in a Crude Oil Contaminated Soil

Cutin, Suberin, and Waxes

Gluconeogenesis from Storage Wax in the Cotyledons of Jojoba Seedlings

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