scholarly journals Effect of seedbed steaming on Cylindrocladium floridanum, soil microbes and the development of white pine seedlings

2005 ◽  
Vol 79 (1) ◽  
pp. 35-43 ◽  
Author(s):  
M.T. Dumas ◽  
S. Greifenhagen ◽  
G. Halicki-Hayden ◽  
T.R. Meyer
Keyword(s):  
Soil Microbes ◽  
Root Weight ◽  
White Pine ◽  
Root Collar Diameter ◽  
Fluorescent Pseudomonas ◽  
Pine Seedlings ◽  
Collar Diameter ◽  
Cylindrocladium Floridanum ◽  
Shoot Weight ◽  
Root Collar

The Egedal® bed steamer produced sufficient heat to kill mierosclerotia of Cylindrocladium floridanum at 5 and 10 cm soil depths in one bareroot forest seedling nursery. At a second nursery, the buried inoculum was killed only to a depth of 5 cm. Soil steaming did not affect the mierosclerotia at 15 cm. The steaming reduced populations of fluorescent pseudomonas to undetectable levels to a depth of 20 cm and populations of Trichoderma species were significantly reduced in the upper 10 cm of the seedbed. Density of white pine seedlings sown in the steamed beds was significantly higher (P= 0.05), and height, root collar diameter, shoot weight and root weight were significantly greater (P= 0.05) 4 months after steaming than that of control seedlings sown in unsteamed beds.

QUALITY APPRAISAL OF WHITE SPRUCE AND WHITE PINE SEEDLING STOCK IN NURSERIES

1960 ◽  
Vol 36 (1) ◽  
pp. 10-13 ◽  
Author(s):  
Alexander Dickson ◽  
Albert L. Leaf ◽  
John F. Hosner
Keyword(s):  
White Spruce ◽  
Seedling Quality ◽  
Root Weight ◽  
Quality Appraisal ◽  
White Pine ◽  
Root Collar Diameter ◽  
Integrated Index ◽  
Collar Diameter ◽  
Shoot Weight ◽  
Root Collar

Total seedling weight, shoot weight and root weight in grams on an oven dry basis, root collar diameter in millimeters, and height in centimeters were used to develop an integrated index of seedling quality.

Effects of mycorrhizas on growth of pine seedlings

2019 ◽  
Vol 28 (03) ◽  
pp. 41-47
Author(s):  
Gantuya B ◽  
Burenjargal O
Keyword(s):  
Survival Rate ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Root Length ◽  
Glomus Mosseae ◽  
Root Collar Diameter ◽  
Percentage Survival ◽  
Pine Seedlings ◽  
Collar Diameter ◽  
Root Collar

Scots pine (Pinus sylvestris) is an economically important source of timber in Mongolia and has been widely used in reforestation programs. In this study, we investigated the effects of mycorrhizas on the growth of pine (Pinus sylvestris) seedlings. Inoculation with ectomycorrhizas and endomycorrhizas increased the height, root length, and root collar diameter of the pine seedlings compared to the non-inoculated seedlings. Furthermore, the results of the study showed that the percentage survival rate is higher in mycorrhizal inoculated pine seedlings than control seedlings. These results demonstrated that inoculation could effectively form ectomycorrhizas with pine seedlings and promote its growth, which can be used to restore Mongolian forest. Нарсны тарьцын ургалтанд микоризын үзүүлэх нөлөө Эгэл нарс (Pinus sylvestris) нь Монгол орны хувьд эдийн засгийн чухал ач холбогдолтой мод бөгөөдойжуулалтанд өргөн ашигладаг. Бид энэхүү судалгаагаараа эгэл нарсны (Pinus sylvestris) тарьцныургалтанд микоризaхэрхэн нөлөөлж буйг судлав. Эктомикоризa (Pisolithus tinctorius, Lactarius laccata)болон эндомикоризийн (Glomus mosseae, Glomus spurcum хх) бэлдмэл ашиглан тарьсан тарьцын өндөр,үндэсний хүзүүвчийн диаметр болон үндэсний урт нь микоризын бэлдмэл ашиглаагүй тарьцуудтайхарьцуулахад илүү байв. Түүнчлэн микоризын бэлдмэл ашигласан тарьцуудын амьдралтын хувийнүзүүлэлт хяналтын тарьцуудаас өндөр байгааг уг судалгааны үр дүн харуулав. Дээрх үр дүнгээрмикоризын бэлдмэл нь нарсны суулгацын үндсэнд микориза болон хэлбэржиж, түүний өсөлтийгдэмжиж байгааг илрүүлсэн бөгөөд уг бэлдмэлийг ойг нөхөн сэргээхэд ашиглах боломжтой юм.Түлхүүр үг: Нарс, өндөр, үндэсний урт, диаметр

scholarly journals Growth Responses of Chemically Root-pruned Cork Oak Seedlings in the Nursery

2001 ◽  
Vol 19 (2) ◽  
pp. 69-72
Author(s):  
M. Pardos ◽  
J.A. Pardos ◽  
G. Montero
Keyword(s):  
Root Length ◽  
Lateral Roots ◽  
Cork Oak ◽  
Root Weight ◽  
Growth Responses ◽  
Latex Paint ◽  
Root Collar Diameter ◽  
Tap Root ◽  
Collar Diameter ◽  
Root Collar

Abstract Cork oak (Quercus suber L.) seedlings of two Iberian provenances (PA-SR and SM-Lp) were grown for one growing season in non-treated containers or in containers treated on their interior surfaces with white exterior latex paint containing 80 g CuCO3/liter. Copper carbonate-treated containers effectively prevented root deformation and decreased the amount of circled, kinked and matted roots formed at the container wall-medium interface. Root morphology was altered by the copper coating, so elongation of lateral roots contacting CuCO3-treated surfaces was more reduced than that of the tap root (82.7% vs 1.5%). These lateral roots showed higher branching frequency than roots contacting untreated container walls. CuCO3 treatment decreased root collar diameter, but did not influence seedling height, leaf area and tap root length. No sign of copper toxicity was observed in any seedling treated with CuCO3. Provenance had a significant effect on height, root collar diameter, tap root length and root weight per unit length; these results may reflect differences in growth habit of the two provenances. Other growth parameters measured were affected by a copper × provenance interaction. Seedlings of the PA-SR provenance produced less root and plant dry wt when grown in CuCO3-treated than in control containers, but shoot:root ratio was not influenced.

scholarly journals Effects of brassinosteroids on prosperity of Scots pine seedlings

2014 ◽  
Vol 60 (No. 9) ◽  
pp. 388-393
Author(s):  
O. Nováková ◽  
I. Kuneš ◽  
J. Gallo ◽  
M. Baláš
Keyword(s):  
Biomass Production ◽  
Scots Pine ◽  
Growth Stress ◽  
Root Collar Diameter ◽  
Positive Effects ◽  
Natural Substances ◽  
Pine Seedlings ◽  
Collar Diameter ◽  
Treatment Mortality ◽  
Root Collar

We tested the influence of exogenous application of brassinosteroids (BRs) on survival, growth and biomass production of Scots pine (Pinus sylvestris) seedlings. BRs are natural substances, supposedly having many positive effects on plants such as improving growth, stress tolerance, survival and biomass production. One part of the seedlings was treated with a low concentration of synthetically prepared BRs and the other part was designated as the control without any treatment. Mortality, height and root collar diameter were measured in two subsequent years, the root-to-shoot ratio of biomass volume was determined in autumn 2013. The application of BRs significantly slowed height and radial growth of pine. The height increment of the BRs-treated seedlings was lower by 11% between 2012 and 2013 compared to the control. The increment in root collar diameter (2012–2013) in the BRs-treated seedlings was lower by 13% than in the control. The BRs-treated pines also experienced a significantly higher mortality compared to the control. No significant influence of BRs on biomass production was found.  

scholarly journals Machine Vision System for Quality Control Assessment of Bareroot Pine Seedlings

1997 ◽  
Vol 21 (2) ◽  
pp. 90-96
Author(s):  
J. H. Wilhoit ◽  
L. J. Kutz ◽  
W. A. Vandier
Keyword(s):  
Machine Vision ◽  
Root Length ◽  
Vision System ◽  
Machine Vision System ◽  
Forest Nursery ◽  
Root Collar Diameter ◽  
Pine Seedlings ◽  
Tap Root ◽  
Collar Diameter ◽  
Root Collar

Abstract A PC-based multiple camera machine vision system for measuring bareroot pine seedlings has been developed for operational data collection in a forest nursery. The system was used for quality control sampling in a forest nursery for 2 lifting seasons. In tests conducted during the first lifting season measuring 100 loblolly pine (Pinus taeda L.) seedlings, there was only moderate correlation on a seedling-by-seedling basis between manual measurements made by nursery personnel and machine vision measurements of root collar diameter, shoot height, and tap root length. Overall machine vision and manual measurement distribution results for seedling samples were in close agreement, however. A bud tip height measurement routine was added to the system after the first lifting season, and a second set of tests was conducted measuring 175 history plot seedlings. In these tests, manual measurements made by researchers correlated well with machine vision measurements of root collar diameter and tap root length. Overall sample distribution results were also in close agreement for root collar diameter, tap root length, and bud tip height. With the machine vision system, seedling samples can be measured by 1 person in approximately the same or less time than it takes 2 people to measure them manually. South. J. Appl. For. 21(2):90-96.

scholarly journals Growth of bare root Pinus taeda, L. seedlings cultivated under five densities in nursery

2007 ◽  
Vol 64 (1) ◽  
pp. 23-29
Author(s):  
José Geraldo de Araújo Carneiro ◽  
Deborah Guerra Barroso ◽  
Luis Maurício da Silva Soares
Keyword(s):  
Pinus Taeda ◽  
Dry Matter ◽  
Root Systems ◽  
Root Collar Diameter ◽  
Plant Densities ◽  
Collar Diameter ◽  
Bare Root ◽  
Pinus Taeda L ◽  
Root Collar ◽  
Dry Matter Weight

Seedlings compete for nutrients, water and light. The available area for each seedling affects their behavior related to requirements for these resources. This experiment evaluated the influence of five plant densities on the growth of bare root Pinus taeda, L. seedlings in a nursery after outplanting. The analyzed characteristics were: height (H), root collar diameter (D), H/D ratio, and dry matter weight. Higher densities stimulated H growth and the lowest densities increased D average and dry matter weight and lowered the H/D ratio. Seedlings were distributed by H, D and H/D classes. Higher densities had a larger number of seedlings in larger H classes. Larger numbers of seedlings with larger D and lower H/D ratios were found in lower densities. Ten months after outplanting the seedlings grown in lower densities had higher survival percentages and growth. Some saplings of standardized heights were uprooted with the objective of studying their root systems. The lowest densities stimulated higher numbers of first and second order roots as well as fresh and dry matter weights of thin roots with mycorrhizae presence. In both parts of the experiment, the density of 278 seedlings m-2 yielded equivalent averages as compared to the lowest densities.

scholarly journals Growth Regulators Affect the Growth and Biochemical Activity of Curcuma longa Plants Grown in vitro

2019 ◽  
Vol 11 (10) ◽  
pp. 277 ◽  
Author(s):  
Meire Pereira de Souza Ferrari ◽  
Mayara dos Santos Queiroz ◽  
Matheus Marquezini de Andrade ◽  
Jessica Rezende Trettel ◽  
Hélida Mara Magalhães
Keyword(s):  
Antioxidant Activity ◽  
Enzymatic Activity ◽  
Growth Regulators ◽  
Curcuma Longa ◽  
Ms Medium ◽  
Biochemical Activity ◽  
Root Collar Diameter ◽  
Collar Diameter ◽  
Root Collar

This study aimed to evaluate the in vitro growth and biochemical activity of Curcuma longa explants using different MS medium formulations and growth regulators. In all the experiments, plants were grown in MS medium supplemented with agar (6.5 g L-1) and pH adjusted to 5.8. In the first assay, the MS culture medium at 70% strength, supplemented with 30 g L-1 of sucrose, and without the addition of activated carbon, resulted in the highest number of shoots. The sucrose concentration of 60 g L-1, combined with the addition of actived charcoalin half-strength MS medium, resulted in the increased root dry mass, root collar diameter, and relative chlorophyll index. In the second assay, the highest root collar diameter and dry matter of shoots and roots were found in the MS medium supplemented with 4.44 BAP, 0.46 KIN, and 1.08 NAA. The MS medium with 8.88 BAP, 0.92 KIN, and 2.16 μM NAA resulted in the highest number of shoots (7.75), number of leaves (35), and shoot length (88.57 mm). The antioxidant activity was significantly higher in the treatments that resulted in better plantlets growth performance, demonstrating that the antioxidant activity is related to other factors such as a possible role of growth regulators on the elicitation of compounds in plants. Superoxide dismutase had a high enzymatic activity in both assays, whereas the enzymatic activity of catalase and ascorbate peroxidase was dependent on the culture media used.

The effect of cupric carbonate on root morphology of containerized mycorrhizal pine seedlings

1985 ◽  
Vol 15 (3) ◽  
pp. 586-592 ◽  
Author(s):  
John L. Ruehle
Keyword(s):  
Root Morphology ◽  
Soil Surface ◽  
Seedling Height ◽  
Fresh Weight ◽  
Latex Paint ◽  
First Order ◽  
Rate Of Spread ◽  
Pine Seedlings ◽  
Collar Diameter ◽  
Root Collar

Loblolly (Pinustaeda L.), longleaf (Pinuspalustris Mill.), shortleaf (Pinusechinata Mill.), and eastern white (Pinusstrobus L.) pine seedlings inoculated with Pisolithustinctorius (Pers.) Coker & Couch (Pt) were raised in a greenhouse in containers painted with latex paint containing 50 g/L cupric carbonate (CuCO3). To determine the effects of CuCO3 on root development and morphology, seedlings were sampled in the middle and at the end of the test. The treatment was effective in preventing most first-order laterals of all species from growing down the container wall, yet it had no significant effect on seedling height, root-collar diameter, or top and root fresh weight. Cupric carbonate had little effect on ectomycorrhizal formation on loblolly and shortleaf seedlings, but significantly increased it on longleaf seedlings and decreased it on eastern white seedlings. Using CuCO3 to alter root morphology of containerized southern pine seedlings inoculated with Pt has the potential for developing stock that will grow long laterals near the soil surface for anchorage and increase the rate of spread of Pt ectomycorrhizae from the plug to new roots after planting.

Sign in / Sign up

Export Citation Format

Share Document