Differential Growth Response of Aspen Clones Stored at Sub-Zero Temperatures

The proportionate development of the embryonic chick skeleton can be influenced experimentally by a variety of factors such as nutritional deficiencies (Byerly, Titus, Ellis, & Landauer, 1935; Landauer, 1936; Romanoff & Bauernfeind, 1942; Couch, Cravens, Elvehjem, & Halpin, 1948), teratogens (Ancel & Lallemand, 1942; Zwilling & de Bell, 1950; Landauer, 1952, 1953a, 1954) and excess hormones (Willier, 1924; Landauer & Bliss, 1946; Duraiswami, 1950). The leg bones are generally more severely affected than the wing bones, but a comparison of the action of several teratogens on the character of the malformations and on the relative growth of the leg bones indicated that the response of individual bones varies with the different agents (Landauer & Rhodes, 1952; Landauer, 1953 a, b, 1954). Cartilaginous limb-bone rudiments also respond differentially when they are isolated from the embryo and exposed in culture to various compounds, such as insulin (Chen, 1954), vitamin A, and the thyroid hormones (Fell & Mellanby, 1955, 1956).

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A photosynthetic and 15N investigation of the differential growth response of barley to nitrate, ammonium, and nitrate + ammonium nutrition

Fundamental, Ecological and Agricultural Aspects of Nitrogen Metabolism in Higher Plants ◽

10.1007/978-94-009-4356-8_43 ◽

1986 ◽

pp. 295-300 ◽

Cited By ~ 5

Author(s):

O. A. M. Lewis ◽

M. I. M. Soares ◽

S. H. Lips

Keyword(s):

Growth Response ◽

Differential Growth ◽

Ammonium Nutrition

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Influence of some carbon sources on growth of Cochliobolus sativus

Canadian Journal of Botany ◽

10.1139/b72-083 ◽

1972 ◽

Vol 50 (3) ◽

pp. 683-685

Author(s):

R. V. Clark

Keyword(s):

Radial Growth ◽

Mycelial Growth ◽

Growth Response ◽

Carbon Sources ◽

Cochliobolus Sativus ◽

Good Growth ◽

Liquid Media ◽

Differential Growth ◽

Agar Media

Four isolates of C. sativus were able to use a number of carbon sources to varying degrees with little evidence of a differential growth response by the isolates. With most carbon sources the response was different when growth on liquid media was compared with that on agar media. Dextrin and L-sorbose were exceptions as dextrin supported good growth with both types and L-sorbose poor with both. Lactose supported the best mycelial growth on liquid media and dextrin the best radial growth and sporulation on agar media when compared with sucrose.

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Differential growth response to increasing growing stock and structural complexity in even- and uneven-sized mixed Picea abies stands in southern Finland

Canadian Journal of Forest Research ◽

10.1139/cjfr-2015-0400 ◽

2016 ◽

Vol 46 (10) ◽

pp. 1195-1204

Author(s):

Eric K. Zenner

Keyword(s):

Growth Response ◽

Structural Complexity ◽

Basal Area ◽

The Other ◽

Selection System ◽

Differential Growth ◽

Widespread Application ◽

Growing Stock ◽

Large Trees ◽

Silvicultural System

Widespread application of the selection system will depend on whether creating stands with uneven-sized (UES) structures comes at the expense of net periodic annual basal area increment (PAI) compared with stands with even-sized (ES) structures. I modeled PAI on growing stock and structural complexity over 12 years in midrotation stands with ES and UES structure types. Average PAI of the largest trees did not differ among types and decreased with increasing stocking, whereas PAI of the smallest trees in the UES type declined with stocking. Trees ≥ 10 cm in diameter grew more slowly in the ES type than the UES type, but no difference was seen after incorporating small trees (down to 5 or 2 cm). In the ES type, PAI of most trees increased linearly with increasing stocking, whereas in the UES type, it increased only up to ∼20 m2·ha−1. As structural complexity increased, PAI of the largest trees increased in the ES type, whereas PAI of all but the largest trees decreased in the UES type. Neither silvicultural system was innately more productive, as each can outperform the other under optimal levels of stocking and structural complexity. However, optimizing increment of only large trees would undermine the UES type.

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Vesicular-arbuscular mycorrhiza in semi-arid pastures of south-west Queensland and their effect on growth responses to phosphorus fertilizers by grasses

Australian Journal of Agricultural Research ◽

10.1071/ar9921143 ◽

1992 ◽

Vol 43 (5) ◽

pp. 1143 ◽

Cited By ~ 7

Author(s):

RD Armstrong ◽

KR Helyar ◽

EK Christie

Keyword(s):

Growth Response ◽

Grass Species ◽

Most Probable Number ◽

Growth Responses ◽

Differential Growth ◽

Probable Number ◽

Vesicular Arbuscular ◽

Phosphorus Fertilizers ◽

Native Pasture ◽

P Fertilizer

Field and controlled environment studies were undertaken to determine the seasonal variation in vesicular-arbuscular mycorrhizal (VAM) propagules under different types of vegetation in the mulga (Acacia aneura) shrublands of south-western Queensland and how inoculation with VAM affects the growth and response to phosphorus fertilizers of several grasses common to this region. A most probable number (MPN) technique was used to estimate the number of viable VAM propagules under mulga shrubland and native pasture. There was a pronounced rise in MPN at a native pasture site from June to November, peaking at 1 propagule/g soil, before declining between November and May to non detectable concentrations. In the mulga shrubland site, MPN remained very low (less than 0.2 propagules/g soil) throughout the study. Pasture species in the field were screened for VAM infection in both winter and summer. Only three of the 14 species sampled were infected with VAM in winter (June) after a long drought. In contrast, 10 of the 14 species sampled in December possessed VAM-infected roots. A pot experiment was conducted to examine the influence of VAM inoculation on growth and the response to phosphate fertilizer of several important pasture grasses in pastures derived from mulga shrublands. The treatments comprised a factorial combination of inoculation or non-inoculation with VAM, four grass species (Aristida armata, Cenchms ciliaris cv. USA, Digitaria ammophilla, and Thyridolepis mitchelliana), and four rates of P fertilizer designed to range over very deficient to non-limiting for each species. All species except D. ammophilla produced growth responses to VAM inoculation. Though C. ciliaris and T. mitchelliana responded to VAM inoculation only in soil unamended with P fertilizer, A. amata showed growth responses across all P rates examined, suggesting some factor other than P was limiting this species. The growth response of the grasses to VAM inoculation was poorly correlated with the percentage of root infected with VAM. D. ammophilla had the highest levels of root infection (32%) despite producing no growth response to VAM. In contrast, T. mitchelliana had less than 2% of the root infected with VAM. All species had thin fibrous roots with long (0.35-0.47 mm), frequent root hairs. The differential growth responses to VAM inoculation of A. armata compared with the other grasses may provide a management strategy to control Aristida ingress into pastures established from mulga shrublands.

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