The limonoid chemistry of the genus Khaya (meliaceae)

Adesida, G.A.; Adesogan, E. K.; Okorie, Dominic A.; Taylor, David A.; Styles, B. T.

doi:10.1016/s0031-9422(00)86448-1

Cited by 61 publications

(55 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A discontinuous east–west distribution across Africa may also influence the diversity of other Khaya species. An early study on the timber, bark and root extracts of the genus Khaya showed considerable variability in the timber chemistry, although they were able to differentiate chemical types that correlated to accepted species (Adesida et al. 1971).…”

Section: Discussionmentioning

confidence: 99%

Rapid microsatellite marker development for African mahogany (Khaya senegalensis, Meliaceae) using next‐generation sequencing and assessment of its intra‐specific genetic diversity

Karan¹,

Evans²,

Reilly³

et al. 2011

Molecular Ecology Resources

View full text Add to dashboard Cite

Khaya senegalensis (African mahogany or dry-zone mahogany) is a high-value hardwood timber species with great potential for forest plantations in northern Australia. The species is distributed across the sub-Saharan belt from Senegal to Sudan and Uganda. Because of heavy exploitation and constraints on natural regeneration and sustainable planting, it is now classified as a vulnerable species. Here, we describe the development of microsatellite markers for K. senegalensis using next-generation sequencing to assess its intra-specific diversity across its natural range, which is a key for successful breeding programs and effective conservation management of the species. Next-generation sequencing yielded 93,943 sequences with an average read length of 234 bp. The assembled sequences contained 1030 simple sequence repeats, with primers designed for 522 microsatellite loci. Twenty-one microsatellite loci were tested with 11 showing reliable amplification and polymorphism in K. senegalensis. The 11 novel microsatellites, together with one previously published, were used to assess 73 accessions belonging to the Australian K. senegalensis domestication program, sampled from across the natural range of the species. STRUCTURE analysis shows two major clusters, one comprising mainly accessions from west Africa (Senegal to Benin) and the second based in the far eastern limits of the range in Sudan and Uganda. Higher levels of genetic diversity were found in material from western Africa. This suggests that new seed collections from this region may yield more diverse genotypes than those originating from Sudan and Uganda in eastern Africa.

show abstract

Section: Discussionmentioning

confidence: 99%

Rapid microsatellite marker development for African mahogany (Khaya senegalensis, Meliaceae) using next‐generation sequencing and assessment of its intra‐specific genetic diversity

Karan¹,

Evans²,

Reilly³

et al. 2011

Molecular Ecology Resources

View full text Add to dashboard Cite

show abstract

“…4 In 2003, the Brazilian government prohibited the harvesting of native mahogany trees. For instance, several limonoid classes, such as khivorins, angolensates, mexicanolides and ssinolides, have been isolated from different parts of K. ivorensis, [12][13][14] whereas S. macrophylla shows mainly phragamalin-class limonoids. To solve this problem, the Brazilian forest certication program (Ceror) was established in 2002, and has been developed by the National Institute of Metrology, Quality and Technology (INMETRO).…”

Section: Introductionmentioning

confidence: 99%

Wood chemotaxonomy via ESI-MS profiles of phytochemical markers: the challenging case of African versus Brazilian mahogany woods

et al. 2015

View full text Add to dashboard Cite

The harvesting of Brazilian mahogany (Swietenia macrophylla) is a main cause of the Brazilian Amazon deforestation and has been therefore prohibited. African mahogany (Khaya ivorensis) was then introduced for Amazon reforestation and the commercialization of such wood is legal, thus creating a challenging problem for wood certification. Herein we report that a wood chemotaxonomic method based on distinct profiles of phytochemical markers is able to promptly characterize both the native and foreign mahogany species. This challenging task has been performed via a simple, fast and unambiguous methodology using direct electrospray ionization mass spectrometry (ESI-MS) analysis of a simple methanolic extract of a tiny wood chip. Typical limonoids such as khivorin, khayanolide A and mexicanolide for African mahogany and phragmalin-type limonoids for the native Brazilian species, as well as distinct polyphenols such as catechin derivatives and cinchonain, form the characteristic phytochemical marker pools for both species. This rapid methodology could therefore be used to monitor legal and illegal mahogany tree harvesting, and hence to control Amazon deforestation. It could also be applied to create a wood certification program for African and Brazilian mahogany trees, as well as for wood certification in general.

show abstract

“…Several limonoids (angolensates, khivorins, mexicanolides and fissinolides) have been isolated from the different parts of Khaya anthotheca (Adesida et al . ) because there is increasing interest in limonoids as alternative chemicals for the control of insect pests (Ruberto et al . ).…”

Section: Introductionmentioning

confidence: 99%

Limonoid derivatives and its pesticidal activities

Park

Bae

Jeon

et al. 2014

Entomological Research

View full text Add to dashboard Cite

Diverse pesticidal activities of anthothecol derived from Khaya anthotheca (Meliaceae) and three limonoids (gedunin, limonin and obacunone) were determined using six phytopathogenic fungi and four insect pests. Anthothecol showed fungicidal activity to Puccinia recondita with control rates of 90, 76 and 53% at concentrations 0.5, 0.25 and 0.1 mg/mL, respectively, while the other limonoids exhibited little inhibitory effect on the fungal survival. The currently used fungicide mancozeb possessed potent fungicidal activity on P. recondite, with 92.3% controlling effect at a concentration of 0.005 mg/mL. Anthothecol exhibited larvicidal activity to Plutella xylostella with 80, 50 and 30% mortality at concentrations of 1.0, 0.5 and 0.25 mg/mL, respectively. Anthothecol showed selective pesticidal activity on P. recondita and P. xylostella. Structural re-examination of anthothecol was conducted and is reported.

show abstract

The limonoid chemistry of the genus Khaya (meliaceae)

Cited by 61 publications

References 5 publications

Rapid microsatellite marker development for African mahogany (Khaya senegalensis, Meliaceae) using next‐generation sequencing and assessment of its intra‐specific genetic diversity

Rapid microsatellite marker development for African mahogany (Khaya senegalensis, Meliaceae) using next‐generation sequencing and assessment of its intra‐specific genetic diversity

Wood chemotaxonomy via ESI-MS profiles of phytochemical markers: the challenging case of African versus Brazilian mahogany woods

Limonoid derivatives and its pesticidal activities

Contact Info

Product

Resources

About