Effects of root-zone temperature on nitrogen accumulation by non-bearing apple trees

SummaryNon-bearing, potted, apple plants were subjected to root temperature of 8.6.1(LRT) or 23.6.18C (HRT) and irrigated with 100 ml of water containing 20 mg of N as NH4NO3, in which both ammonium and nitrate-N fractions were enriched in 15N (10 atom%). The root system of each plant was pressurized (325 kPa) at day 1, 2, 4, and 8 after15 N application to evaluate the transport of nitrogen derived from fertilizer (NDFF) through the xylem. This technique was used to investigate N absorption. LRT reduced the rate of N uptake the day after 15N application relative to HRT. Two, 4 and 8.d after fertilization, the rate of exudation and consequently the uptake rate was similar for LRT and HRT. The total amount of N removed by plants after 8.d was not affected by root treatments. Carbon dioxide assimilation, transpiration rate and stomatal conductance were lower for trees subjected to LRT during the time course of the experiment. We suggest that the delay in N absorption was related mostly to the lower activity ...

[1]  E. A. Kirkby,et al.  Principles of Plant Nutrition , 1980, Springer Netherlands.

[2]  J. Bigot,et al.  Low‐temperature pretreatment of the root system of Brassica rapa L. plants: effects on the xylem sap exudation and on the nitrate absorption rate , 1994 .

[3]  H. Marschner,et al.  Adaptation of potassium translocation into the shoot of maize (Zea mays) to shoot demand : evidence for xylem loading as a regulating step , 1992 .

[4]  E. A. Kirkby,et al.  Diurnal uptake of nitrate and potassium during the vegetative growth of tomato plants , 1992 .

[5]  H. Marschner,et al.  Root to shoot translocation of macronutrients in relation to shoot demand in maize (Zea mays L.) grown at different root zone temperatures , 1992 .

[6]  J. S. Titus,et al.  Nitrogen accumulation and nitrate reductase activity in MM. 106 apple trees as affected by nitrate supply , 1992 .

[7]  M. Tagliavini,et al.  Influence of phosphorus nutrition and root zone temperature on growth and mineral uptake of peach seedlings 1 , 1991 .

[8]  E. Paul,et al.  Automated analysis of 15N and 14C in biological samples , 1989 .

[9]  R. Habib,et al.  Mesures in vivo et in situ de l'activité nitrate réductase chez le pêcher (Prunus persica (L.) Batsch) , 1989 .

[10]  H. Marschner.  Mineral Nutrition of Higher Plants , 1988 .

[11]  G. Neilsen,et al.  Effect of root temperature and varying cation ratios on growth and leaf cation concentration of apple seedlings grown in nutrient solution , 1986 .

[12]  K. Bhat.  Nutrient inflows into apple roots. II. Nitrate uptake rates measured on intact roots of mature trees under field conditions , 1982 .

[13]  D. Osmond,et al.  Fatty Acid Composition and Nitrate Uptake of Soybean Roots during Acclimation to Low Temperature. , 1982, Plant physiology.

[14]  D. G. Lugg,et al.  Leaf Azimuthal Orientation of Sorghum in Four Row Directions1 , 1981 .

[15]  A. H. Markhart,et al.  Low temperature acclimation of root fatty acid composition, leaf water potential, gas exchange and growth of soybean seedlings. , 1980 .

[16]  R. Hageman,et al.  [24] Nitrate reductase from higher plants , 1980 .

[17]  A. J. Warner,et al.  Relationships between Root Temperature and the Transport of Ammonium and Nitrate Ions by Italian and Perennial Ryegrass (Lolium multiflorum and Lolium perenne). , 1979, Plant physiology.

[18]  P. Kramer,et al.  Effect of temperature on water and ion transport in soybean and broccoli systems. , 1979, Plant physiology.

[19]  J. Berry,et al.  Effects of low temperature on respiration and uptake of rubidium ions by excised barley and corn roots. , 1978, Plant physiology.

[20]  Y. Mizrahi,et al.  The Influence of Root Temperature on Apple Trees. I. Growth Responses Related to The Application of Potassium Fertilizer , 1976 .

[21]  E. Simon.  PHOSPHOLIPIDS AND PLANT MEMBRANE PERMEABILITY , 1974 .

[22]  D. Dilley,et al.  The occurrence of nitrate reductase in leaves of prunus species. , 1972, Plant physiology.

[23]  E. Epstein.  Mineral Nutrition of Plants: Principles and Perspectives , 1972 .

[24]  R. Hageman,et al.  The occurrence of nitrate reductase in apple leaves. , 1969, Plant physiology.

[25]  P. F. Scholander,et al.  Sap Pressure in Vascular Plants , 1965, Science.