Free paper — Cytogenetic characterization and genome size of the medicinal plant Catharanthus roseus (L.) G. Don
The genome size and organization of the important medicinal plant Catharanthus roseus is shown to correspond to 1C = 0.76 pg (~738 Mbps) and 2n=16 chromosomes. The data in this recently published paper provide a sound basis for future studies including cytogenetic mapping, genomics and breeding.
Free paper — Identification of Stylosanthes guianensis varieties using molecular genetic analysis
Molecular genetic diversity and population structure analysis were used to clarify the controversial botanical classification of Stylosanthes guianensis. In this paper, the accessions were clustered in nine groups, each of which was mainly composed of only one of the four botanical varieties.
Co-adaptation of seed dormancy and flowering time
Time from seed dispersal to germination and time from germination to flowering are two key life history traits that determine fitness and coexistence of weeds in arable fields. Toorop et al. characterize these two traits in genotypes of Capsella bursa-pastoris(shepherd’s purse) and show an association between early flowering time and weak secondary dormancy. Three functional groups of seed dormancy are identified, varying in dormancy depth and nitrate response. One of these groups (FG-III) is distinct for early-flowering genotypes, conferring a selective advantage in arable fields.
Free paper — Non-symbiotic haemoglobins—What’s happening beyond nitric oxide scavenging?
The evidence presented here suggests non-symbiotic hemoglobins affect hormone responses by scavenging NO. Auxin, jasmonic acid, salicylic acid, ethylene and abscisic acid have altered responses when hemoglobins are expressed. Non-symbiotic hemoglobin is a factor during plant development, biotic and abiotic stress.
Free paper — An epifluorescent attachment improves whole-plant digital photography of Arabidopsis thaliana expressing red-shifted green fluorescent protein
This paper reports that filter cubes made with machine-vision dichroic filters and illuminated with a royal blue light emitting diode can be used to produce an epifluorescent digital camera attachment that improves whole organism green fluorescent protein (GFP) photography. Mean pixel intensity responds linearly to purified GFP titration.