It is desirable and necessary to reexamine the influences of stock andl scion oIn alkaloid synthesis and transformation using plants which behave differently witlh respect to alkaloid formation (4). Experiments were conducted in the greenhouse for 3 years in an attempt to separate the effects of root, or stock, from those of the top, or scioIn, on alkaloid synthesis and transformation. Some of ...

-Top grafting is used to accelerate the breeding cycle of loblolly pine (Pinus taeda L). Scions, collected from seedlings as young as 1 year from seed, are grafted onto mature interstocks of the same or a related species. Male and female strobili production often begins 1 or 2 years after grafting, thus potentially decreasing the generation time by several years over conventional accelerated br...

A full-length drought-responsive gene Ccrboh, encoding the respiratory burst oxidase homologue (rboh), was cloned in Citrullus colocynthis, a very drought-tolerant cucurbit species. The robh protein, also named NADPH oxidase, is conserved in plants and animals, and functions in the production of reactive oxygen species (ROS). The Ccrboh gene accumulated in a tissue-specific pattern when C. colo...

The term 'RNA silencing' describes a process that results in the specific degradation of an RNA target. In plants, silenced tissues can initiate the spreading of the process into non-silenced regions by a mobile signal that can be transmitted over long distances. In the present work, we made use of a modified grafting approach to elucidate the driving force behind long-distance transport of the...

Phenolic compounds of the skin and seeds are the principal sources of wine color and structural properties. Under semi-arid conditions, irrigation management is the most determining factor of grape and wine quality while rootstocks affect numerous physiological and vegetative parameters of the scion. In the present study, compositional changes of skin and seed phenolic compounds were studied in...

The water deficit is one of the main limiting factors to yield sweet oranges. present study aimed determine alternative rootstocks ‘Rangpur’ lime for ‘Pera’ oranges grown on tropical hardsetting soils with greater potential tolerance deficit. Six citrus scion/rootstock combinations were during eight years in an orchard established Sergipe, Brazil. tree height, number fruits per plant, cumulated...

A multi-year orchard experiment was established to measure the performance of Rootpac®-R, Rootpac®-20, Rootpac®-40, and Rootpac®-70 rootstocks using ‘Redhaven’ peach (Prunus persica var. persica) as scion, compared with Bailey seedling rootstock, current industry standard. Tree survival after five years 79% on Rootpac-40, whereas remaining showed no tree mortality. vigour canopy height width we...