What do you mean by plastochron?

What do you mean by plastochron?

A plastochron is defined as the time interval between two successive recurring events during the growth of plant shoots, such as leaf initiation.

Who introduced the idea of plastochron ratio?

F. J. Richards
In 1951, F. J. Richards introduced the idea of the plastochron ratio and developed a system of equations to describe mathematically a centric representation using three parameters: plastochron ratio, divergence angle, and the angle of the cone tangential to the apex in the area being considered.

What is a leaf trace definition?

leaf trace. noun. botany a vascular bundle connecting the vascular tissue of the stem with that of a leaf.

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.

What is the difference between leaf gap and leaf trace?

base of the leaf as leaf traces, connecting the vascular system of the stem with that of the leaf. The point at which the stem bundle diverges from the vascular cylinder toward the leaf is a leaf gap, called a lacuna.

What is the main function of stomata?

Stomata, the small pores on the surfaces of leaves and stalks, regulate the flow of gases in and out of leaves and thus plants as a whole.

What is the main function of apical meristem?

Apical meristem, region of cells capable of division and growth in the root and shoot tips in plants. Apical meristems give rise to the primary plant body and are responsible for the extension of the roots and shoots.

Which is the best definition of a plastochron?

Definition of plastochron. : a unit of time corresponding to the interval between two successive similar, periodically repeated events (as the emergence of leaf primordia at any two successive nodes in a stem apex)

When did F J Richards create the plastochron ratio?

In 1951, F. J. Richards introduced the idea of the plastochron ratio and developed a system of equations to describe mathematically a centric representation using three parameters: plastochron ratio, divergence angle, and the angle of the cone tangential to the apex in the area being considered.

Who is the inventor of the plastochron clock?

Fifty-eight years ago, Ralph Erickson and Francis Michelini (1957) proposed an alternative clock that has found wide use in studies on plant stem development. The unit of the Erickson and Michelini clock is the plastochron, a concept that was initially proposed by Askenasy (1880) during his studies on filamentous Charaphylaceae growth.

How is the plastochron used to measure plant age?

As the tip of a plant shoot grows, new leaves are produced at regular time intervals if temperature is held constant. This time interval is termed the plastochron (or plastochrone ). The plastochrone index and the leaf plastochron index are ways of measuring the age of a plant dependent on morphological traits rather than on chronological age.