Reduction of leaf photosynthesis and transpiration rates of potato plants by second‐stage juveniles of Globodera pallida

Reduction of leaf photosynthesis and transpiration rates of potato plants by second‐stage... Abstract. Net photosynthesis and transpiration rates of potato plants, grown in pots in the greenhouse, were measured at various light irradiances and ambient CO2 concentrations, 3d after inoculation with second stage juveniles of Globodera pallida. Gas exchange rates, both in darkness and in light, and the initial light use efficiency were strongly reduced by nematodes. Stomatal conductance of infected plants was lower than that of control plants and showed little response to decreasing ambient CO2 concentration. The maximum internal CO2 concentration of infected plants was lower than that of control plants. Globodera pallida reduced photosynthesis also by apparent non‐stomatal effects. The effects of G. pallida on gas exchange rates are similar to the effects of abscisic acid in the transpiration stream and of abiotic stresses in the root environment. Apparently, there is a general response of plant roots to adverse conditions. The reduction of photosynthesis may be an important factor in yield reduction by potato cyst nematodes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Cell & Environment Wiley

Reduction of leaf photosynthesis and transpiration rates of potato plants by second‐stage juveniles of Globodera pallida

Plant Cell & Environment, Volume 14 (7) – Sep 1, 1991

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Publisher
Wiley
Copyright
Copyright © 1991 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0140-7791
eISSN
1365-3040
DOI
10.1111/j.1365-3040.1991.tb01544.x
Publisher site
See Article on Publisher Site

Abstract

Abstract. Net photosynthesis and transpiration rates of potato plants, grown in pots in the greenhouse, were measured at various light irradiances and ambient CO2 concentrations, 3d after inoculation with second stage juveniles of Globodera pallida. Gas exchange rates, both in darkness and in light, and the initial light use efficiency were strongly reduced by nematodes. Stomatal conductance of infected plants was lower than that of control plants and showed little response to decreasing ambient CO2 concentration. The maximum internal CO2 concentration of infected plants was lower than that of control plants. Globodera pallida reduced photosynthesis also by apparent non‐stomatal effects. The effects of G. pallida on gas exchange rates are similar to the effects of abscisic acid in the transpiration stream and of abiotic stresses in the root environment. Apparently, there is a general response of plant roots to adverse conditions. The reduction of photosynthesis may be an important factor in yield reduction by potato cyst nematodes.

Journal

Plant Cell & EnvironmentWiley

Published: Sep 1, 1991

References

  • The effect of Globodera pallida and G. rostochiensis on potato yield
    Greco, Greco; Divito, Divito; Brandonisio, Brandonisio; Giordano, Giordano; Marinis, Marinis
  • Abscisic acid is not the only stomatal inhibitor in the transpiration stream of wheat plants
    Munns, Munns; King, King
  • Development of potato cyst nematodes in roots of resistant Solanum tuberosum ssp. andigena and S. vernei hybrids
    Turner, Turner; Stone, Stone
  • Changes in the concentration of ABA in xylem sap as a function of changing soil water status can account for changes in leaf conductance and growth
    Zhang, Zhang; Davies, Davies

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