[pvaldes]

> There's probably no reason cuttings should be different than a whole plant

Its uncommon, but it happens sometimes... and there can be in fact a fundamental difference: different hormone gradient. A well known case is with ivy. If you take cuttings on flowered stems of common ivy, the new plants retain the rombic leaf shape typical of reproductive stems and the effect last for the life of this first leaves. The ivy born from seeds do not have this rombic leaves until many years later, when they mature.

> Does rootstock transmit "memories" to a scion

Not, because memories are stored in neurons and plants do not have this, but is a well known fact also that rootstock can change the scion behaviour (for example improving the sugar in fruits and advancing the age of first maturation). If you change 'memories' by 'chemicals', the answer could be yes, of course. It depends on the definition of what could be loosely called as 'memory' in a plant.