Exempel på rootstock

• Once clones are evaluated on a standard rootstock, it would be wise to use this rootstock for commercial plantings.

• Differences in geography, cultivars, rootstocks, soils, microclimate and growers' personal preferences determine the production practices and materials used in organic apple orchard management.

• Mycorrhizal plants of these rootstocks were more resistant than non-mycorrhizal ones after five days of drought.

• Regional assessments of rootstock performance are already known to be important.

• The pot-medium water content in mycorrhizal un-irrigated plants of these rootstocks was 0.185 and 0.216 cm3 cm-3 respectively.

• Given the well-established relationship between vigour and yield in cocoa, the desired rootstock influence is a positive change in 'yield efficiency'.

• There was no indication of an interaction between rootstock and scion for any of the traits that were studied.

• The yields showed no evidence of a major effect of rootstock or interaction with scion in this trial.

• Mn levels were satisfactory on all rootstocks except for the low levels on the two citranges.

• Seeds for rootstocks were produced by manual pollination with flower buds capped before anthesis and after manual pollination to prevent accidental cross-pollination.

• The most vigorous rootstock had a trunk circumference 14 % greater than the weakest.

• High-yielding genotypes are usually salt-sensitive, so grafting them onto resistant rootstocks can be a feasible strategy to improve salt tolerance.

• Resistant rootstocks are used to control grape phylloxera damage, but the phylloxera/grape interaction is poorly understood.

• Photosynthesis and stomatal conductances were affected by drought but in very different ways in each rootstock.

• The next section describes propagation and rootstock development, and the plant material used in extensively well-documented worldwide breeding programmes and their goals and successes.