Category: AoB PLANTS

Mesophyll cells in spruce needles show accelerated cell senescence due to elevated CO2 concentration. Photo credit: M Günthardt-Goerg 0

Responses of beech and spruce foliage to elevated carbon dioxide, increased nitrogen deposition and soil type

Although enhanced car­bon fix­a­tion by forest trees may con­trib­ute sig­ni­fic­antly to mit­ig­at­ing an increase in atmo­spheric CO2, capa­cit­ies for this fix­a­tion vary greatly among dif­fer­ent tree spe­cies and loc­a­tions. In a study pub­lished in AoB…

Study site of the Polylepis tarapacana forest in the Salar de Surire, Central Andes (Photo credit: Duncan Christie).

Photosynthetic responses of trees in high-elevation forests: Comparing evergreen species along an elevation gradient in the Central Andes

Plant growth at extremely high elev­a­tions is con­strained by high daily thermal amp­litude, strong solar radi­ation, and water scarcity. These con­di­tions are par­tic­u­larly harsh in the trop­ics, where the highest-elevation treelines occur. In this…

Due to seasonal inundation, these vernal pools (yellow) in central California have harsher conditions than the surrounding grassland matrix. Virtually all of the plants in the grassland are non-native invasive species, while the pools are largely devoid of non-natives. 
Photo credit: Truman Young, UC Davis.

Plant communities in harsh sites are less invaded: a summary of observations and proposed explanations

Within the inva­sion eco­logy lit­er­at­ure, it is often noted that abi­ot­ic­ally stress­ful envir­on­ments are typ­ic­ally less invaded by non-native plants than nearby less-stressful envir­on­ments. However, until now no one had col­lec­ted and sum­mar­ized examples…

Automated phenotyping of Arabidopsis thaliana genotypes on the PHENOPSIS platform. Photo credit: B Blonder.

Testing models for the leaf economics spectrum with leaf and whole-plant traits in Arabidopsis thaliana

The leaf eco­nom­ics spec­trum (LES) is a global set of pat­terns that describes cor­rel­a­tions between func­tional traits (e.g. car­bon assim­il­a­tion rate, lifespan) that determ­ine ter­restrial resource fluxes. Several classes of mod­els have been pro­posed to…

DNA barcodes from four loci provide poor resolution of taxonomic groups in the genus Crataegus"> Crataegus chrysocarpa (fireberry hawthorn, NT516, North Okanagan Regional District, British Columbia, Canada). Photo © Mehdi Zarrei 2010.

DNA barcodes from four loci provide poor resolution of taxonomic groups in the genus Crataegus">DNA barcodes from four loci provide poor resolution of taxonomic groups in the genus Crataegus

The leaves and fruits of some of the approx­im­ately 230 spe­cies of hawthorn (Crataegus) yield nat­ural health products with sig­ni­fic­ant thera­peutic effects on symp­toms of car­di­ovas­cu­lar dis­ease. DNA bar­cod­ing could be a valu­able tool for…