Canopy and environmental control of root dynamics in a long-term study of Concord grape.

Below-ground carbon allocation represents a substantial fraction of net photosynthesis in plants, yet timing of below-ground allocation and endogenous and exogenous factors controlling it are poorly understood. Minirhizotron techniques were used to examine root populations of Vitis labruscana Bailey cv. Concord under two levels of dormant-season canopy removal and irrigation. Root production, pigmentation, death and disappearance to a depth of 110 cm were determined over two wet and two dry years (1997-2000). There was continual root production and senescence, with peak root production rates occurring by midseason. Later in the season, when reproductive demands for carbon were highest and physical conditions limiting, few roots were produced, especially in dry years in nonirrigated vines. Root production under minimal canopy pruning was generally greater and occurred several weeks earlier than root production under heavy pruning, corresponding to earlier canopy development. Initial root production occurred in shallow soils, likely due to temperatures at shallow depths being warmer early in the season. Our study showed intricate relationships between internal carbon demands and environmental conditions regulating root allocation.

[1]  N. E. Miller,et al.  Fine-root production dominates response of a deciduous forest to atmospheric CO2 enrichment. , 2004, Proceedings of the National Academy of Sciences of the United States of America.

[2]  J. Öhrvik,et al.  Interactive effects of soil warming and fertilization on root production, mortality, and longevity in a Norway spruce stand in Northern Sweden , 2004 .

[3]  Peter B Reich,et al.  The impact of material used for minirhizotron tubes for root research. , 2003, The New phytologist.

[4]  J. Ayars,et al.  Growth and Production of Young Peach Trees Irrigated by Furrow, Microjet, Surface Drip, or Subsurface Drip Systems , 2003 .

[5]  L. Comas,et al.  Multiple risk factors in root survivorship: a 4-year study in Concord grape. , 2003, The New phytologist.

[6]  P. Groffman,et al.  Environmental control of fine root dynamics in a northern hardwood forest , 2003 .

[7]  T. Dejong,et al.  Seasonal patterns of vegetative growth and competition with reproductive sinks in peach (Prunus persica) , 2003 .

[8]  P. Dry,et al.  Strategic irrigation management in Australian vineyards , 2001 .

[9]  L. Comas,et al.  Assessing root death and root system dynamics in a study of grape canopy pruning. , 2000 .

[10]  P. Reich,et al.  Genetic and environmental control of seasonal carbohydrate dynamics in trees of diverse Pinus sylvestris populations. , 2000, Tree physiology.

[11]  A. Lakso,et al.  RESPONSES TO DROUGHT OF BALANCE-PRUNED AND MINIMALLY-PRUNED 'CONCORD' GRAPEVINES , 1999 .

[12]  A. Fitter,et al.  Root production and turnover in an upland grassland subjected to artificial soil warming respond to radiation flux and nutrients, not temperature , 1999, Oecologia.

[13]  S. Weinbaum,et al.  Alternate Bearing Affects Nitrogen, Phosphorus, Potassium and Starch Storage Pools in Mature Pistachio Trees , 1998 .

[14]  T. Bouma,et al.  Root respiration in citrus acclimates to temperature and slows during drought , 1997 .

[15]  R. B. Jackson,et al.  A global budget for fine root biomass, surface area, and nutrient contents. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[16]  S. Weinbaum,et al.  Assessment of nitrogen, phosphorus, and potassium uptake capacity and root growth in mature alternate-bearing pistachio (Pistacia vera) trees. , 1996, Tree physiology.

[17]  T. Kätterer,et al.  Fine-root dynamics, soil moisture and soil carbon content in a Eucalyptus globulus plantation under different irrigation and fertilisation regimes , 1995 .

[18]  H. Lyr,et al.  Influence of root temperature on growth of Pinus sylvestris, Fagus sylvatica, Tilia cordata and Quercus robur , 1995, Trees.

[19]  Terence L. Robinson,et al.  Comparison of Four Methods for Estimating Total Light Interception by Apple Trees of Varying Forms , 1995 .

[20]  Alain Bouquet,et al.  Biology of the Grapevine , 1992 .

[21]  D. Eissenstat,et al.  Root growth and carbohydrate responses in bearing citrus trees following partial canopy removal. , 1992, Tree physiology.

[22]  P. Puttonen,et al.  PATTERNS OF GAS-EXCHANGE, PHOTOSYNTHATE ALLOCATION, AND ROOT-GROWTH DURING A ROOT-GROWTH CAPACITY TEST , 1992 .

[23]  P. Gregory,et al.  Root Development and Function. , 1988 .

[24]  Liangyan Yang,et al.  [Community structure characteristics of phytoplankton and related affecting factors in Hengshan Reservoir, Zhejiang, China]. , 1988 .

[25]  Howard M. Taylor,et al.  PENETRATION OF COTTON SEEDLINGN TAPROOTS AS INFLUENCED BY BULK DENSITY, MOISTURE CONTENT, AND STRENGTH OF SOIL , 1963 .

[26]  Norton Nelson,et al.  A PHOTOMETRIC ADAPTATION OF THE SOMOGYI METHOD FOR THE DETERMINATION OF GLUCOSE , 1944 .

[27]  R. Schreiner.  Mycorrhizal Colonization of Grapevine Rootstocks under Field Conditions , 2003, American Journal of Enology and Viticulture.

[28]  A. Lakso.  Physiology of Minimal versus Normal Pruning of Concord Grapes , 2001 .

[29]  J. Devereux Joslin,et al.  Disturbances During Minirhizotron Installation Can Affect Root Observation Data , 1999 .

[30]  A. J. M. Smucker,et al.  A Minirhizotron System forIn SituRoot Observation Studies of Seyval Grapevines , 1992, American Journal of Enology and Viticulture.

[31]  H. Mooney,et al.  Resource Limitation in Plants-An Economic Analogy , 1985 .

[32]  H. So,et al.  Effects of soil bulk density and water regimen on root growth and uptake of phosphorus by ryegrass , 1984 .

[33]  R. Smart,et al.  A Root Observation Laboratory for Studies with Grapevines , 1976, American Journal of Enology and Viticulture.

[34]  H. Lyr,et al.  Growth Rates and Growth Periodicity of Tree Roots , 1967 .

[35]  M. Smogyi,et al.  Notes on sugar determination. , 1952, The Journal of biological chemistry.