What is a Phyllochron interval?
The phyllochron interval (PI) is defined as the TT between the appearance of successive fully expanded leaves (or leaf tips) on a stem. The phyllochron gradually increases with leaf number (LNo) because each emerging leaf has to travel through increasing longer sheaths of older leaves.
When describing for growth a Phyllochron is?
The phyllochron is the intervening period between the sequential emergence of leaves on the main stem of a plant, also rendered as leaf appearance−1. This measurement is used by botanists and agronomists to describe the growth and development of plants, especially cereals.