Michelia

About: Michelia is a research topic. Over the lifetime, 198 publications have been published within this topic receiving 1565 citations. The topic is also known as: Magnolia sect. Michelia.

Chemical Divergence in Floral Scents of Magnolia and Allied Genera (Magnoliaceae)

Abstract: Floral scents emitted from Magnolia, Michelia and Liriodendron taxa native to or cultivated in North America, Mexico and Japan were collected by the headspace method and analyzed using gas chromatography – mass spectrometry (GC-MS) Volatile compounds are widespread in the flowers of angiosperms and the chemical property of the scents can be distinguished in taxa For example, the primary chemical in the scent of Magnolia virginiana growing in Louisiana (USA) is linalool, whereas in Maryland (USA) population flowers emit 2-phenylethanol The flowers of M grandiflora and M tamaulipana both emit a number of monoterpenes, mainly geraniol derivatives, but scents of M pyramidata yield mainly fatty acid esters Caryophyllene is exclusively emitted by M sieboldii ssp japonica, isobutyl acetate by Michelia figo, and 1,2-dimethoxybenzene by M salicifolia The flowers of L tulipifera and L chinense emit mainly hydrocarbon-terpenoids, the former dominated by limonene, the latter by afarnesene In some closely related disjunct taxa distributed in North America and eastern Asia the floral scents closely resemble each other, eg, Magnolia tripetala (North America) and M hypoleuca (Japan) both strongly emit methyl benzoate Another set of disjunct taxa, M acuminata (North America) and M heptapeta (China) both exclusively emit pentadecane, a hydrocarbon In some species of Magnolia, volatile compounds present in floral scents are also emitted in damaged leaves This suggests these chemicals play different roles in various plant organs (deter leaf herbivores, attract parasitoids, attract insects to flowers, etc)

Notes on Magnoliaceae with a revision of Pachylarnax and Elmerrillia and the Malesian species of Manglietia and Michelia

Abstract: After the general chapters, mainly based on literature and dealing with wood anatomy, characters of the leaf epidermis and foliar sclereids, embryology and chromosome numbers, phytochemistry, and characters of the fruit, the generic delimitation of subfamily Magnolioideae is discussed. Paramichelia Hu and Tsoongiodendron Chun are reduced to Michelia Linne; Talauma Juss., Aromadendron Blume, Alcimandra Dandy, Dugandiodendron Lozano and Manglietiastrum Law are reduced to Magnolia Linne. Parakmeria omeiensis Cheng & Hu is renamed Magnolia omeiensis, Parakmeria yunnanensis Cheng & Hu is renamed Magnolia yunnanensis, Manglietiastrum sinicum Law is renamed Magnolia sinicum, and Alcimandra cathcartii Dandy is renamed Magnolia cathcartii Manglietia singalanensis Agostini is reduced to M. glauca var. sumatrana. Elmerrillia mollis Dandy and E. papuana Dandy are reduced to Elmerrillia tsiampacca (Linne) Dandy, the former is named subsp. mollis (Dandy) Noot. and of the latter var. glaberrima is renamed E. tsiampacca var. glaberrima (Dandy) Noot. Michelia arfakiana Agostini is reduced to Elmerrillia tsiampacca var. tsiampacca and Michelia sumatrae Dandy is renamed M. salicifolia Agostini. Newly described is Michelia koordersiana Noot. and keys are given to the genera, subgenera and sections.

Reproductive and Pollination Biology of Magnolia and its Allied Genera (Magnoliaceae). I. Floral Volatiles of Several Magnolia and Michelia Species and their Roles in Attracting Insects

Abstract: Volatile substances emitted from the flowers of eight Magnolia taxa (M. sieboldii ssp. japonica, M. praecocissima var. praecocissima and var. borealis, M. tomentosa, M. salicifolia, M. obovata, M. denudata, and M. grandiflora) and one Michelia species (M. compressa) (Magnoliaceae) were examined and identified using GC-MS. Volatile substances of these Magnolia and Michelia species consist primarily of monoterpenoids and sesquiterpenoids produced by the mevalonate pathway, acetogenins by the acetate-malonate pathway, and phenyl-propanoids by the shikimate pathway. These Magnolia and Michelia species all possessed various combinations of volatile monoterpenoids, acetogenins, and phenylpropanoids, except for Magnolia obovata, which emitted primarily sesquiterpenoids. Free amino acids in pollen of 12 Magnolia and one Liriodendron species were also analyzed, and their value as food sources for pollinators evaluated. Pollinators visiting the flowers of five Magnolia species were collected in their native sites and identified. Their behaviors and roles as pollinating agents were assessed.