., 1992 ), and sunflowers ( Grassini et al., 2007 ), that leaf gas exchange is affected by the lack of oxygen in the rhizosphere. Depending on the growth stage at which soil waterlogging occurs, such reduction in CO 2 assimilation may reduce the number of
57 ORAL SESSION 17 (Abstr. 116-123) Tree Fruit and Berries: Gas Exchange/Photosynthesis
intercellular CO 2 decrease slightly, and stomatal limitations to gas exchange dominate ( Cifre et al., 2005 ). At severe water deficits ( g S less than 0.05 mol·m −2 ·s −1 H 2 O), P n further decreases and c i increases indicating that non
and yield of pecan. The objectives of this study were to evaluate the effect of soil surface manipulation and indaziflam application on ET, gas exchange parameters of pecan trees, and phytotoxicity effects of indaziflam on pecan trees. Materials and
We thank J. Julian for his valuable contribution by designing and constructing the canopy cuvettes and P. Alspach for writing the SAS analysis program for calculating whole-canopy gas exchange. The cost of publishing this paper was defrayed in
“particle film” on the plant surface. Although designed not to interfere with leaf gas exchange, the findings to this end are mixed ( Glenn and Puterka, 2005 ). Differences in product application, climatic conditions, crop or cultivar, and physiological
in the present study). It is not known what the physiological consequences of leafminer infestation on gas exchange are and whether pecan shows any compensatory response. The objective of this study was to investigate the effects of pecan blotch
visual quality and growth data are presented in the companion article ( Sun et al., 2020 ). Gas exchange. Leaf P n , g S , E , and WUE were recorded 2 d before the first and second harvest. Four plants per taxa per treatment were selected randomly for
). Two methods are commonly used to estimate WUE for trees and shrubs: instantaneous WUE from measurements of leaf gas exchange and integrated WUE based on stable carbon isotope discrimination. Instantaneous WUE measures WUE at the leaf level and is the
study of the effect of fruiting and biennial bearing potential on spur quality and leaf gas exchange in apple. Bearing classification was based on experience with these cultivars. This experiment used mature trees growing on dwarfing ‘Budagovsky 9’ (B.9