LCMS-DNP based dereplication of Araucaria cunninghamii Mudie gum-resin: identification of new cytotoxic labdane diterpene

AbstractA branchlet-mining scolytid beetle, Hylurdrectonus araucariae Schedl, has invaded the hoop pine (Araucaria cunninghamii) plantations at Bulolo and Wau in Papua New Guinea. A study of the infestation pattern in a plot of 184 young (5–6 year-old) trees at Bulolo from February 1968–August 1972 revealed four major phases: (i), a relatively prolonged but small build-up of the population on most trees over a period of 12–18 months following the first attack; (ii), a dramatic upsurge in the infestation over the following 12–18 months, reaching a peak infestation with the severe attack of nearly all trees in the plot; (iii), a sharp decline in the number of attacks and population over the next 12–18 months due to a lack of nest sites and food and (iv), a slow decline over a protracted period. The variation (313 to 6220) in the maximum number of infested branchlets on the trees in the plot at peak attack was great, due to the differing amounts of foliage and size of the trees, but it usually represented an estimated 85–95% of the foliage.A comparative study of seedling resistance of the two major plantation species, hoop pine and klinkii pine (Araucaria hunsteinii) was carried out at Bulolo in 1967 using seedlings from the local nursery and placing them in cages with large quantities of infested foliage. Over a two-month period, no colonies of H. araucariae were established in the klinkii pine seedlings and only three of 32 attacks recorded in the hoop pine seedlings had produced brood. Infestation of seedlings was extremely rare in the plantations and natural stands. On the other hand, most trees aged 2·5 to 12 years in the plantations at Bulolo and Wau were susceptible to severe infestation. Older trees were seldom severely attacked. Klinkii pine has proved non-susceptible to attack. In studies of impact in three plots of 1000 trees at Bulolo from 1967–1971, least growth increment and highest mortality was recorded in the plot that had been initially severely affected by the scolytid. In contrast, good growth and low mortality was recorded in the plot of healthy trees. They were later exposed to severe infestation from the adjacent plantation of young 3–4 year-old trees, but escaped relatively unscathed. In another study of impact at Bulolo from 1967–1972, the effect of two levels of pruning on subsequent growth and re-infestation was examined. The results indicated that site also strongly affected the situation, with little growth and high mortality evident on poor sites. Secondary insects, notably the weevil Vanapa oberthueri Pouillaude, were an important factor contributing to mortality among the stressed trees.

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RETRACTED ARTICLE: A new antifungal labdane diterpene from the leaves of Saraca indica

Natural Product Research ◽

10.1080/14786419.2013.855931 ◽

2013 ◽

Vol 29 (21) ◽

pp. (i)-(vi) ◽

Cited By ~ 2

Author(s):

U. Hawas ◽

S. Eltomy ◽

R. Nassif ◽

G. El-Hossary ◽

S. AbouZid

Keyword(s):

Labdane Diterpene ◽

Retracted Article

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KERAGAMAN GENETIK POPULASI Araucaria cunninghamii MENGGUNAKAN PENANDA RAPD (RANDOM AMPLIFIED POLYMORPHIC DNA)

Jurnal Pemuliaan Tanaman Hutan ◽

10.20886/jpth.2010.4.2.63-77 ◽

2010 ◽

Vol 4 (2) ◽

pp. 63-77

Author(s):

AYPBC Widyatmoko ◽

◽

Elisabeth Selda Patrisia Lejo ◽

Aniek Prasetyaningsih ◽

Anto Rimbawanto ◽

...

Keyword(s):

Random Amplified Polymorphic Dna ◽

Araucaria Cunninghamii

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A comparative evaluation of Kumaun Himalayan Gymnosperms for their Antifungal potential against plant pathogenic fungi

The Journal of Phytopharmacology ◽

10.31254/phyto.2018.7302 ◽

2018 ◽

Vol 7 (3) ◽

pp. 230-241

Author(s):

Savita Joshi ◽

◽

Parikshit Kumar ◽

Prabha Pant ◽

SC Sati ◽

...

Keyword(s):

Antifungal Activity ◽

Fungal Pathogens ◽

Ethanol Extract ◽

Pathogenic Fungi ◽

Total Activity ◽

Maximum Activity ◽

Diffusion Method ◽

Phytochemical Analysis ◽

Cedrus Deodara ◽

Araucaria Cunninghamii

Fungicidal activity of 10 ethnobotanically known Kumaun Himalayan gymnospermous plants namely Araucaria cunninghamii, Biota orientalis, Cedrus deodara, Cephalotaxus griffithi, Cryptomeria japonica Cupressus torulosa, Ginkgo biloba, Juniperus communis, Picea smithiana and Pinus wallichiana were tested against six plant disease causing fungal pathogens by agar well-diffusion method. Forty extracts of these gymnospermic leaves in different organic solvents (methanol, ethanol, chloroform and hexane) were studied by performing the 160 sets of experiments. The MIC values of each extract (where % inhibition ≥ 40%) were also determined. All the plant extracts exhibited strong antifungal activity. Results indicated that all leaves extracts of C. griffithi and G. biloba were found most effective among the tested plants extracts. Hexane extract of C. griffithi was showed highest inhibitory activity against C. falcatum (72%; MIC, 7.81µg/ml) and T. indica (70%; MIC, 15.62µg/ml). On the other hand, ethanol extract of G. biloba also showed remarkable activity against P. oryzae (66% with MIC, 7.81g/ml). While P. wallichiana leave extracts were found less active among the studied plants against all the tested fungal strains. The chloroform extracts were found the most effective against all the tested fungi (10% to 60%), followed by ethanol extract (30-50%), methanol extract (20-40%), while in hexane extracts ranged 10-30% only. The extracts of C. griffithi exhibited superior Relative Antifungal Activity (RAA, 20%), followed by G. biloba and A. cunninghamii (RAA, 19 and 12%, respectively). All data were also analyzed for determination of total activity of plant for each studied species of gymnosperm. C. griffithi had maximum activity i.e. 71 % followed by G. biloba (54%) and A. cunninghamii (33%). C. torulosa showed the least total activity and RAA i.e. 8% and 3%, respectively. All the plant species assayed possess definite antifungal properties and suggested for phytochemical analysis to identify the active principles responsible for their antifungal activity

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