A Distinct Arabidopsis Latent Virus 1 Isolate Was Found in Wild Plants and Bees, Suggesting the Potential Involvement of Pollinators in Virus Spread.

During our search for aphid-pathogenic viruses, a comovirus was isolated from wild asymptomatic (white mustard) plants harboring a dense population of aphids. The transmission-electron-microscopy visualization of purified virions revealed icosahedral particles. The virus was mechanically transmitted to plants belonging to , , and families, showing unique ringspot symptoms only on var.

Slow release of a synthetic auxin induces formation of adventitious roots in recalcitrant woody plants.

Clonal propagation of plants by induction of adventitious roots (ARs) from stem cuttings is a requisite step in breeding programs. A major barrier exists for propagating valuable plants that naturally have low capacity to form ARs. Due to the central role of auxin in organogenesis, indole-3-butyric acid is often used as part of commercial rooting mixtures, yet many recalcitrant plants do not form ARs in response to this treatment.

Short De-Etiolation Increases the Rooting of VC801 Avocado Rootstock.

Dark-grown (etiolated) branches of many recalcitrant plant species root better than their green counterparts. Here it was hypothesized that changes in cell-wall properties and hormones occurring during etiolation contribute to rooting efficiency. Measurements of chlorophyll, carbohydrate and auxin contents, as well as tissue compression, histological analysis and gene-expression profiles were determined in etiolated and de-etiolated branches of the avocado rootstock VC801.