Nonhost angiosperm volatiles and verbenone were tested for their ability to disrupt the response of western pine beetle, Dendroctonus brevicomis LeConte (Coleoptera: Scolytidae), to attractant-baited multiple funnel traps. Verbenone significantly reduced attraction; however, no difference was observed between 4 and 50 mg/24-h release rates. Combinations of six bark volatiles (benzyl alcohol, be...

20  Flowering plants display extraordinary diversity in the morphology of male sexual 21 organs, yet the functional significance of this variation is not well understood. Here, 22 we conduct a comparative analysis of floral correlates of heteranthery—the 23 morphological and functional differentiation of anthers within flowers—among 24 angiosperm families to identify traits associated with thi...

The widespread recognition of the scientific importance of leaf architecture, the description and interpretation of leaf shape and venation, is a cornerstone contribution of Leo Hickey’s career. One leaf architectural trait that Hickey developed is leaf rank, which describes the level of organization of leaf venation in a single, discrete, ordinal variable. He used this scoring system to provid...

The majority of variation in rates of molecular evolution among seed plants remains both unexplored and unexplained. Although some attention has been given to flowering plants, reports of molecular evolutionary rates for their sister plant clade (gymnosperms) are scarce, and to our knowledge differences in molecular evolution among seed plant clades have never been tested in a phylogenetic fram...

Angiosperm mitochondrial genomes (mtDNA) exhibit variable quantities of alien sequences. Many of these sequences are acquired by intracellular gene transfer (IGT) from the plastid. In addition, frequent events of horizontal gene transfer (HGT) between mitochondria of different species also contribute to their expanded genomes. In contrast, alien sequences are rarely found in plastid genomes. Mo...

Founded in 1991 and published by the Indian Association for Angiosperm Taxonomy (IAAT), Rheedea is an international peer-reviewed journal with four online two print issues per year. The will be March, June, September December while printed June December.

Founded in 1991 and published by the Indian Association for Angiosperm Taxonomy (IAAT), Rheedea is an international peer-reviewed journal with four online two print issues per year. The will be March, June, September December while printed June December.

The pseudo-response regulators (PRRs) are the circadian clock component proteins in the model dicot Arabidopsis thaliana. They contain a receiver-like domain (RLD) similar to the receiver domains of the RRs in the His-Asp phosphorelay system, but the RLDs lack the phosphoacceptor aspartic acid residue invariably conserved in the receiver domains. To study the evolution of PRR genes in plants, h...

‘In the case of plants, an adequate fossil record does not exist . . .’ (Boulter et al., 1972) ‘Molecular clocks are like Santa Claus: everyone wants to believe in them, but no one really does.’ (H. Brad Shaffer, pers. comm.) The second most interesting thing about Magall on et al.’s new analysis of the timing of angiosperm diversification in this issue of New Phytologist (pp. 437–453) is their...