Water stress and crop load effects on fruit fresh and dry weights in peach (Prunus persica).

Effects of water stress on fruit fresh and dry weights were investigated in peach trees, Prunus persica (L.) Batsch., with varying crop loads: light, moderate and heavy. In well-watered controls, tree water status was independent of crop load. In trees receiving reduced irrigation, the degree of water stress increased with increasing crop load. Water stress induced fruit fresh weight reductions at all crop loads. Fruit dry weight was not reduced by water stress in trees having light to moderate crop loads, indicating that the degree of water stress imposed did not affect the dry weight sink strength of fruit. Water-stressed trees with heavy crop loads had significantly reduced fruit dry weights, which were likely due to carbohydrate source limitations resulting from large crop carbon demands and water stress limitations on photosynthesis.

[1]  A. Picken,et al.  An analysis of the accumulation of water and dry matter in tomato fruit , 1987 .

[2]  Y. L. Grossman,et al.  PEACH: A simulation model of reproductive and vegetative growth in peach trees. , 1994, Tree physiology.

[3]  D. Ehret,et al.  Effects of Osmotic Potential in Nutrient Solution on Diurnal Growth of Tomato Fruit , 1986 .

[4]  E. Ziegel.  SAS System for Linear Models (3rd ed.) , 1992 .

[5]  D. Chalmers,et al.  The effect of reduced water supply on peach prunus persica tree growth and yields , 1982 .

[6]  T. Dejong,et al.  The Kearney Agricultural Center Perpendicular “V” (KAC-V) Orchard System for Peaches and Nectarines , 1994 .

[7]  M. Dixon,et al.  Water relations of the tomato during fruit growth , 1992 .

[8]  M. R. Thorpe,et al.  Water Potential, Translocation and Assimilate Partitioning , 1986 .

[9]  Maria Manuela Chaves,et al.  Effects of Water Deficits on Carbon Assimilation , 1991 .

[10]  D. Chalmers,et al.  Water Use, Growth, and Fruit Yield of `Hosui' Asian Pears under Deficit Irrigation , 1994 .

[11]  J. Andrews,et al.  Respiration and growth of tomato fruit , 1995 .

[12]  D. Chalmers,et al.  The Effects of Regulated Water Deficits on Pear Tree Growth, Flowering, Fruit Growth, and Yield , 1984, Journal of the American Society for Horticultural Science.

[13]  I. B. Wilson,et al.  Productivity of Peach Trees : Tree Growth and Water Stress in Relation to Fruit Growth and Assimilate Demand , 1978 .

[14]  Theodore M. DeJong,et al.  Fruit effects on photosynthesis in Prunus persica , 1986 .

[15]  M. Matthews,et al.  Developmental changes in the diurnal water budget of the grape berry exposed to water deficits , 1994 .

[16]  Celiam . Smith,et al.  Plant water status, hydraulic resistance and capacitance , 1989 .

[17]  S. Grattan,et al.  Developmental changes in tomato fruit composition in response to water deficit and salinity , 1991 .

[18]  D. Chalmers,et al.  CHAPTER 5 – WATER RELATIONS OF PEACH TREES AND ORCHARDS , 1983 .

[19]  D. Beukes,et al.  Growth and quality of apples as affected by different irrigation treatments , 1985 .

[20]  B. Ende,et al.  A Reappraisal of the Growth and Development of Peach Fruit , 1975 .

[21]  J. Huguet,et al.  Response of peach tree growth and cropping to soil water deficit at various phenological stages of fruit development , 1989 .

[22]  Jc Miller,et al.  Dry Matter Partitioning and Vegetative Growth of Young Peach Trees Under Water Stress , 1990 .

[23]  F. N. David,et al.  Principles and procedures of statistics. , 1961 .

[24]  T. Dejong,et al.  Source- and Sink-limited Growth Periods of Developing Peach Fruits Indicated by Relative Growth Rate Analysis , 1993 .

[25]  J. Williamson,et al.  The Relationship Among Root Growth, Shoot Growth, and Fruit Growth of Peach , 1989, Journal of the American Society for Horticultural Science.

[26]  Y. L. Grossman,et al.  Maximum Fruit Growth Potential and Seasonal Patterns of Resource Dynamics During Peach Growth , 1995 .

[27]  Kenneth A. Shackel,et al.  Stem-water Potential as a Sensitive Indicator of Water Stress in Prune Trees (Prunus domestica L. cv. French) , 1992 .

[28]  Carlos H. Crisosto,et al.  Irrigation Regimes Affect Fruit Soluble Solids Concentration and Rate of Water Loss of `O'Henry' Peaches , 1994 .