J. Timothy Ball

TL;DR: In this article, a linear correlation between stomatal conductance (g) and CO2 assimilation rate (A) has been reported when photon fluence was varied and when the photosynthetic capacity of leaves was altered by growth conditions, provided CO2, air humidity and leaf temperature were constant.

TL;DR: In this article, a system of models for the simulation of gas and energy exchange of a leaf of a C3 plant in free air is presented, where the physiological processes are simulated by sub-models that: (a) give net photosynthesis (An) as a function of environmental and leaf parameters and stomatal conductance (gs); (b) give g, as well as the concentration of CO2 and H2O in air at the leaf surface and the current rate of photosynthesis of the leaf.

TL;DR: Developing the idea of a measurement system, the design and construction of gas-exchange systems are addressed, considering both measurement principles and the devices that form system components.

TL;DR: Following application of abscisic acid to the heterobaric leaves of Xanthium strumarium L., clearly delineated regions varying in nonphotochemical quenching appeared that coincided with areoles formed by minor veins and indicated stomatal closure in groups.

TL;DR: Growth at elevated CO{sub 2} increased photosynthetic nitrogen use efficiency for pines and deciduous trees and increased the A-N relationship when species were pooled by vegetation type, which indicated that species measured at ambient CO{ Sub 2} did not separate into distinct groups matching community or vegetation type.