A Panax notoginseng Root Tip Meristem Biosensor and Its Sensing Kinetics for Five Important Nitrogen Nutrients

Table 2

Double reciprocal linear regression equations of P. notoginseng root tip meristems of different ages interacting with sodium nitrate.

Panax notoginseng age	Double reciprocal equation	Coefficient of determination (R^2)
2-year-old		0.9894
3-year-old		0.9587
4-year-old		0.9764