Principle
Cohesion-Tension Theory
Water is pulled up through the xylem of plants due to transpiration at the leaves creating negative pressure (tension) and the cohesive properties of water molecules.
Plant Physiology
Field: Plant Physiology
Sequence of Expressions
Hypothesis
Pressure Flow Hypothesis
Dissolved sugars flow from sources (leaves) to sinks (roots/fruits) driven by a pressure gradient generated by osmosis.
Principle
Alternation of Generations
A life cycle in which there is both a multicellular diploid form (sporophyte) and a multicellular haploid form (gametophyte).
When a process depends on a number of factors, its rate is limited by the pace of the slowest factor.