Traslocation

1. Traslocation

2. translocation • Trasnlocation: Movement of sucrose and amino acids in the pholem • Glucose made from leaves is converted into sucrose in the leaves • Sugar moves into the pholem tubes • The pholem tubes carry sugar to growing buds (need it for energy and make cellulose cell walls for new cells) • Or pholem also transports it roots • Sugar can be changed into starch and stored.

3. Translocation of applied chemicals • Pesticides kill pests that can harm plants • Contact pesticide – pesticide has to touch the pest in order to kill it • Systemic pesticide – plant absorbs the pesticide into its tissue • The pholemtranslocates it all over the plant • Any pest that eats the plant will die.

4. Sources to sinks • Source – part of the plant where glucose or sucrose is produced • Sink – part of the plant were glucose or sucrose is produced (in difference seasons) goes to. • Eg. Potato • Spring – potato planted (tubers – contain starch and is broken down and changed into sucrose) - pholem carries it to the shoots that grow out of the tuber. This will continue until leaves break the soil surface and can photosynthesize.

5. Summer – leaves fully develop continue to photosynthesize (now they are source for sucrose) - Some sucrose is transported down to the roots where it is used to produce new tubers • Autumn – Leaves all die (tubers left underground) • In spring – they will grow new shoots again