Infection of plants with viruses containing multiple variants frequently leads to dominance by a few random variants in the systemically infected leaves (SLs), for which a plausible explanation is lacking. We show here that SL dominance by a given viral variant is adequately explained by its fortuitous lead in systemic spread, coupled with its resistance to superinfection by other variants. We ...

(Note: Interest in planting cover crops has increased dramatically the past few years, not only in NYS but in ag regions across the US. Attendance at the Cover Crop & Soil Health session at the Empire State Producers’ Expo has been 90 – 100 the past few years. As growers returned to this practice they began to experiment with a wider range of cover crops than ever before, including brassicas li...

Sliced turnip root (Brassica campestris L. ssp rapa) was irradiated for a total o f 20 min with a 15 W germicidal lamp and the tissue incubated at 25 °C. The effects o f such treatment on indole phytoalexins (methoxybrassinin (I); brassinin (II); cyclobrassinin (III); spirobrassinin (IV) and glucosinolates were determined using high performance liquid chromatography procedures. Accumulation o f...

The transition from embryonic to vegetative growth marks an important developmental stage in the plant life cycle. The turnip (tnp) mutant was identified in a screen for modifiers of POLARIS expression, a gene required for normal root growth. Mapping and molecular characterization of tnp shows that it represents a gain-of-function mutant of LEAFY COTYLEDON1 (LEC1), due to a promoter mutation. T...

The catalytic oxidation under green conditions of pyrogallol into purpurogallin was performed by air with laccase model copper complexes or plant extracts containing peroxidases in the presence hydrogen peroxide. A study conducted for turnip, depending on amount extract, method introduction and pH. Optimization these made it possible to easily obtain pure a yield 78%.

In many areas of Australia’s mixed farming zone, cropping rotations are dominated by cereals and some have few suitable broadleaf alternatives. Forage brassicas widely used in high rainfall livestock systems, but this study shows that several genotypes offer an alternative to forage oats drier environments within zone. We compared a diverse set brassica sown autumn winter with benchmark species...

Cocksfoot mottle sobemovirus supports replication and encapsidation of the viroid-like satellite RNA (sat-RNA) of lucerne transient streak virus (LTSV) in two monocotyledonous species, Triticum aestivum and Dactylis glomerata. Additionally, LTSV sat-RNA replicates effectively in the presence of turnip rosette sobemovirus in Brassica rapa, Raphanus raphanistrum and Sinapsis arvensis, but not in ...

Less than 10% of the acid p-nitrophenylphosphatase activity of plant extracts was sedimentable under a variety of conditions including zonal centrifugation. The sedimentable fraction did not show the latency properties characteristic of animal lysosomes. We conclude that, at least operationally, plant acid phosphatase is a soluble enzyme and that it is not suitable as a lysosomal marker. The pl...