Degradation of Ursolic Acid, a Major Component of Apple Wax, by a Pseudomonad Isolated from Soil

Hankin, Lester; Kolattukudy, Pappachan E.

doi:10.1099/00221287-56-2-151

Cited by 6 publications

(1 citation statement)

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“…Although we did not study the metabolism of leaf hydrocarbons, it is interesting to note that Microcoacus cerificans can grow on w-nonacosane, a paraffin isolated from cabbage; there was evidence that the paraffin was probably oxidized to shorter chain compounds which in turn were incorporated in waxy esters and other lipids (Hankin & Kolattukudy, 1968). Ursolic acid, a major component of wax of apple, is also actively metabolized by Pseudomonas (Hankin & Kolattukudy, 1969). Acenetobacter sp.…”

Section: Discussionmentioning

confidence: 98%

The utilization of leaf wax by N₂-fixing micro-organisms on the leaf surface

Samanta¹,

Dutta²,

Sen³

1986

J. Agric. Sci.

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SUMMARYThe possibility of utilization of leaf wax by N2-fixing micro-organisms on the leaf surface of plants was examined. Chloroform and n-hexane extractable wax could be isolated in significant amounts, ranging between 0·13 and 6·83 g/kg fresh weight from leaves of rice cv. IR·26, wheat cv. Sonalika, jute cv. JRO 632, pigeon pea, Ficus benghalensis, F. religiosa, Eichornia crassipes, Calotropis procera and Cocos nucifera. Pigeon pea and coconut leaves were very rich in wax. The utilization of leaf wax was studied by observing the growth of micro-organisms in Burk's N-less DN2 medium containing 0·025% yeast extract and jute or coconut leaf wax as the sole C source. A 2·fold increase in growth was observed as compared with the control containing no wax. The most growth was exhibited by Pseudomonas azotogensis, P8. azotocolligans, Xanthobacter flavus, Azotobacter paspali 23A and Klebsiella pneumoniae Kupbr2. Utilization of wax components was studied by comparing the amounts of acetylated alcohols and methyl esters of fatty acids in leaves inoculated with those untreated with bacteria after separation of the components by gas chromatography. A strain of K. pneumoniae KUP4, the association of which very remarkably improved the growth of jute plants, was found to utilize particularly C10–, C13– and C16– saturatedfatty acids and C15–, C18–, C25–, C26– and C27– fatty alcohols. It is suggested that leaf wax may act partly as an energy substrate for growth of N2-fixing micro-organisms on the leaf surface.

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Section: Discussionmentioning

confidence: 98%

The utilization of leaf wax by N₂-fixing micro-organisms on the leaf surface

Samanta¹,

Dutta²,

Sen³

1986

J. Agric. Sci.

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Utilization of cutin by a pseudomonad isolated from soil

Hankin

Kolattukudy

1971

Plant Soil

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Plant waxes

Kolattukudy

1970

Lipids

250

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The surface of plants is covered with a complex mixture of lipids, often in crystalline form, called plant waxes. The chemistry, biosynthesis, catabolism and function of plant waxes are reviewed. The most common components are hydrocarbons, wax esters, free fatty alcohols and acids. Ketones, secondary alcohols, diols, aldehydes, terpenes and flavones are also found. The major function of the wax appears to be protection of the organism from water loss and other hazards of the environment. The alkanes are formed from fatty acids either by elongation followed by decarboxylation or by head‐to‐head condensation between two biochemically dissimilar fatty acids followed by specific decarboxylation of one of them. Fatty acyl‐CoA is reduced to the aldehyde which in turn is reduced to the alcohol. The alcohol is then esterified with acyl moieties from acyl‐CoA or phospholipids. Plant waxes undergo very little catabolism in plants but animals can degrade them to a limited extent and microorganisms readily degrade them.

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Degradation of Ursolic Acid, a Major Component of Apple Wax, by a Pseudomonad Isolated from Soil

Cited by 6 publications

References 2 publications

The utilization of leaf wax by N₂-fixing micro-organisms on the leaf surface

The utilization of leaf wax by N₂-fixing micro-organisms on the leaf surface

Utilization of cutin by a pseudomonad isolated from soil

Plant waxes

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Degradation of Ursolic Acid, a Major Component of Apple Wax, by a Pseudomonad Isolated from Soil

Cited by 6 publications

References 2 publications

The utilization of leaf wax by N2-fixing micro-organisms on the leaf surface

The utilization of leaf wax by N2-fixing micro-organisms on the leaf surface

Utilization of cutin by a pseudomonad isolated from soil

Plant waxes

Contact Info

Product

Resources

About

The utilization of leaf wax by N₂-fixing micro-organisms on the leaf surface

The utilization of leaf wax by N₂-fixing micro-organisms on the leaf surface