Vascular tissues. Xylem: dead tracheary elements conducting water + minerals upward by cohesion-tension (transpiration stream). Phloem: living sieve elements conducting photosynthate source-to-sink (pressure-flow).
Vascular tissues. Xylem: dead tracheary elements conducting water + minerals upward by cohesion-tension (transpiration stream). Phloem: living sieve elements conducting photosynthate source-to-sink (pressure-flow).