scholarly journals An Assessment of Cylindrocarpon on Container Western White Pine Seedlings After Outplanting

2000 ◽  
Vol 15 (1) ◽  
pp. 5-7
Author(s):  
R. Kasten Dumroese ◽  
Robert L. James ◽  
David L. Wenny
Keyword(s):  
Root Systems ◽  
Growth Potential ◽  
White Pine ◽  
Root Growth Potential ◽  
Poor Predictor ◽  
Pine Seedlings ◽  
Nursery Stock ◽  
Morphological Criteria ◽  
Western White Pine ◽  
Similar Site

Abstract Cylindrocarpon root disease can destroy root systems of container seedlings. Foresters were concerned that infected nursery stock would perform poorly after outplanting. Root growth potential tests were a poor predictor of disease levels on seedlings that otherwise met standard morphological criteria (height, stem diameter, and firm root plugs) for outplanting. Cylindrocarpon on western white pine persists longer on outplanted stock than Fusarium oxysporum or F. proliferatum on Douglas-fir seedlings on a similar site. Mortality caused by herbivores was as serious a threat to plantation establishment as was mortality caused by all other factors. Our results suggest that western white pine seedlings infected with Cylindrocarpon, but meeting morphological criteria for outplanting, will perform satisfactorily in the field. West. J. Appl. For. 15(1):5-7.

Root growth potential and shoot activity of northern and southern provenances of 1–0 eastern white pine seedlings grown in a Virginia nursery

1988 ◽  
Vol 18 (5) ◽  
pp. 610-614 ◽  
Author(s):  
Kurt H. Johnsen ◽  
Peter P. Feret ◽  
John R. Seiler
Keyword(s):  
Root Growth ◽  
Genetic Control ◽  
Growth Potential ◽  
White Pine ◽  
Eastern White Pine ◽  
Root Growth Potential ◽  
Pine Seedlings ◽  
Southern Half ◽  
Sib Families ◽  
Potential Test

Root growth potential and shoot activity were examined from October until April using northern and southern half-sib families of 1–0 eastern white pine (Pinusstrobus L.) seedlings (grown in a Virginia nursery). There were significant differences in root growth potential between northern and southern provenances and this was apparently due to the larger size of seedlings of southern origin. Heritability estimates indicate that root growth potential is under minimal genetic control in 1–0 eastern white pine seedlings. Southern provenances maintained higher shoot activity at the end of the root growth potential test during the autumn months. By April, northern provenances had surpassed southern provenances in shoot activity. Large differences in shoot activity did not result in large root growth potential differences which may indicate that bud dormancy status does not highly influence root growth potential in 1–0 eastern white pine seedlings.

Chemical Root Pruning Improves the Root System Morphology of Containerized Seedlings

1989 ◽  
Vol 4 (1) ◽  
pp. 15-17 ◽  
Author(s):  
David L. Wenny ◽  
Richard L. Woollen
Keyword(s):  
Pinus Ponderosa ◽  
Ponderosa Pine ◽  
Growth Potential ◽  
Root Pruning ◽  
Pinus Monticola ◽  
White Pine ◽  
Root Growth Potential ◽  
Latex Paint ◽  
Greenhouse Production ◽  
Interior Walls

Abstract Douglas-fir (Pseudotsuga menziesii var. glauca) ponderosa pine (Pinus ponderosa var. ponderosa), and western white pine (Pinus monticola) where chemically root pruned with cupric carbonate (CuCO3) during greenhouse production. The interior walls of Styroblock 4A® and Ray Leach® pine cell containers (each 66 cm³) were coated with latex paint containing CuCO3 at concentrations of 0, 30, 100, or 300 g/l. Seedlings were potted after one growing season, initiating a standard root growth potential test (Duryea 1984). The number and length of new roots more than 1 cm in length were measured. Seedling root systems increased in total root number and length, especially in the upper segments of the root plug, as a result of chemical root pruning. Seedling height and caliper were unaffected by the cupric carbonate treatments during the production phase, and a latex paint carrier did not decrease seedling growth. West. J. Appl. For. 4(1):15-17, January 1989.

scholarly journals A method for continuously monitoring the quality of Masson pine seedlings

2020 ◽  
Author(s):  
Li Wan ◽  
Handong Gao ◽  
Zhuo Huang ◽  
Chao Li
Keyword(s):  
Time Scale ◽  
Continuous Monitoring ◽  
Root Elongation ◽  
Poor Performance ◽  
Growth Potential ◽  
Root Growth Potential ◽  
Masson Pine ◽  
Pine Seedlings ◽  
Plant Phenotype

AbstractRoot growth potential (RGP) is a popular physiological indicator used to evaluate seedling vigor. However, the time scale used in the RGP test is the order of days, which leads to poor performance of the RGP method. We propose an optical interference method, called statistical interferometry, to measure minute root elongation at a sub-nanometer scale, which can decrease the time used in measuring RGP. The time scale of this method is also 104 times less than that of the RGP method. Because we can measure the length of root elongation continuously, we can compute the root elongation rate (RER), which is the variety of the length of root elongation per second. Continuous monitoring can help determine the quality of Masson pine seedling as soon as possible. To show the effectiveness of our proposed method, we designed an experiment, in which we applied different water stresses to our collected Masson pine seedlings and acquired two groups of pines, representing two different qualities: one stressed by water and one not. After measuring the RER of the groups in our experiments, we found that RER is interrelated with the quality of seedlings.Author summaryLi Wang have worked in Nanjing Forest University. His interesting includes machine learning, computer vision and plant phenotype.

Foliar Nitrogen Content at Lifting Correlates with Early Growth of Loblolly Pine Seedlings from 20 Nurseries

1988 ◽  
Vol 12 (3) ◽  
pp. 181-185 ◽  
Author(s):  
Harry S. Larsen ◽  
David B. South ◽  
James N. Boyer
Keyword(s):  
Nitrogen Content ◽  
Loblolly Pine ◽  
Volume Growth ◽  
Field Performance ◽  
Height Growth ◽  
Growth Potential ◽  
Root Weight ◽  
Root Growth Potential ◽  
Foliar Nitrogen ◽  
Pine Seedlings

Abstract Height growth of outplanted loblolly pine seedlings was monitored over a 3-year period. Growth of seedlings from 20 nurseries was correlated with initial seedling characteristics from paired samples. Height growth during the first 6 months after planting was negatively correlated with the initial seedling height and shoot/root ratio and was positively correlated with root growth potential (RGP) and root weight. However, these variables were not significantly correlated with later growth. Foliar nitrogen content (mg of foliar nitrogen per seedling) was positively correlated with both initial and subsequent field growth. Foliar nitrogen content was the only variable that was significantly correlated with diameter growth and volume growth during the third year after planting. This variable accounted for 36% of the variation among sample means for 3-year height growth. These data support a previous report that field performance of loblolly pine seedlings during the first 3 years in the field can be influenced by the foliar nitrogen content at lifting. South. J. Appl. For. 12(3):181-185.

Effects of Viterra® Root Dips and Benomyl on Root Growth Potential and Survival of Longleaf Pine Seedlings

1994 ◽  
Vol 18 (1) ◽  
pp. 19-23
Author(s):  
David B. South ◽  
Nancy J. Loewenstein
Keyword(s):  
Root Growth ◽  
Active Ingredient ◽  
Longleaf Pine ◽  
Pinus Palustris ◽  
Growth Potential ◽  
Poor Survival ◽  
Root Growth Potential ◽  
Pine Seedlings ◽  
Clay Slurry

Abstract A mixture of clay and benomyl is registered for use on longleaf pine (Pinus palustris Mill.) to control diseases and increase outplanting survival. However, for one sandy site in Alabama, treating roots with a gel slurry of Viterra containing benomyl reduced survival of stored seedlings when compared to a clay slurry containing benomyl (2.5% active ingredient). Root growth potential for January-lifted seedlings was also reduced by adding benomyl to a Viterra gel. For this study, seedlings planted in January and mid-February had better survival than seedlings planted in December or March. Poor survival in December resulted when seedlings were planted 2 wk prior to a hard freeze. South. J. Appl. For. 18(1):19-23.

Root Stripping Reduces Root Growth Potential Of Loblolly Pine Seedlings

1990 ◽  
Vol 14 (4) ◽  
pp. 196-199 ◽  
Author(s):  
David B. South ◽  
Nancy J. Stumpff
Keyword(s):  
Root Growth ◽  
Loblolly Pine ◽  
Relative Effect ◽  
Growth Potential ◽  
Root Weight ◽  
Root Growth Potential ◽  
Root Shoot Ratio ◽  
Pine Seedlings ◽  
Pinus Taeda L ◽  
Root Apices

Abstract Stripping short roots from individual loblolly pine (Pinus taeda L.) seedlings was accomplished by pulling the root system through a closed fist either 1, 2, or 4 times. The root growth potential (RGP) of the seedlings was directly related to the intensity of stripping. One stripping removed approximately 2% of the total root weight, yet reduced the number of root apices by 22% and caused a 47% reduction in RGP. Four strippings removed approximately 11% of the root weight, reduced the root/shoot ratio by about 9% and resulted in a 69% reduction in RGP. Although stripping of roots reduced both shoot and root growth, the relative effect on new shoot growth was not as great as with new root growth. Root stripping effectively eliminated any correlation between seedling diameter and RGP. South. J. Appl. For. 14(4):196-199.

Resistance to Cronartiumribicola in Pinusmonticola: Genetic Control of Needle-Spots-Only Resistance Factors

1971 ◽  
Vol 1 (4) ◽  
pp. 197-202 ◽  
Author(s):  
G. I. McDonald ◽  
R. J. Hoff
Keyword(s):  
Genetic Control ◽  
Resistance Mechanism ◽  
Mixed Population ◽  
White Pine ◽  
Resistance Factors ◽  
Pine Seedlings ◽  
Western White Pine ◽  
Recessive Genes ◽  
Sib Families

Full-sib families of western white pine seedlings obtained by crossing phenotypically resistant parents were inoculated with a mixed population of Cronartiumribicola basidiospores. Families segregated into resistant and susceptible plants along patterns suggesting that the needle-spots-only resistance mechanism is controlled by two independent recessive genes.

Changes in loblolly pine root growth potential from September to April

1987 ◽  
Vol 17 (7) ◽  
pp. 635-643 ◽  
Author(s):  
Laura E. DeWald ◽  
Peter P. Feret
Keyword(s):  
Root Growth ◽  
Loblolly Pine ◽  
Environmental Changes ◽  
Lateral Roots ◽  
Root Systems ◽  
Shoot Elongation ◽  
Growth Potential ◽  
Late Winter ◽  
Root Growth Potential ◽  
Shoot Phenology

Loblolly pine (Pinustaeda L.) 1 + 0 seedlings were periodically hand lifted from a Virginia nursery to determine how root growth potential (RGP) varied between September and April. Several seedling characteristics, RGP, and shoot phenology were recorded for each lift date in 1983–1984 and 1984–1985. An attempt was made to relate RGP variation to changes in the nursery environment and to shoot phenology. Root growth potential variation was consistent between years and was more closely related to shoot phenological changes than to short-term environmental changes. During the development of dormancy, RGP was low, RGP increased when shoot activity resumed during the RGP tests (late winter, early spring), and declined as active shoot elongation began in the nursery. When RGP was low, elongation of existing lateral roots primarily contributed to the new root systems, but as seedling metabolism increased in the late winter, new root initiation also contributed to new root systems. Absolute differences in RGP between years may be related to the fibrosity of seedling root systems.

Sign in / Sign up

Export Citation Format

Share Document