The Effects of Seed Mass on Germination, Seedling Emergence, and Early Seedling Growth of Eastern White Pine (Pinus strobus L.)

New Forests ◽  
2006 ◽  
Vol 32 (1) ◽  
pp. 33-49 ◽  
Author(s):  
William C. Parker ◽  
Thomas L. Noland ◽  
Andrée E. Morneault
Keyword(s):  
Seedling Growth ◽  
Seedling Emergence ◽  
Seed Mass ◽  
Pinus Strobus ◽  
White Pine ◽  
Eastern White Pine ◽  
Early Seedling Growth ◽  
Early Seedling

Effect of seed mass on early seedling growth of five eastern white pine (Pinus strobus L.) families under contrasting light environments

2004 ◽  
Vol 82 (11) ◽  
pp. 1645-1655 ◽  
Author(s):  
William C Parker ◽  
Thomas L Noland ◽  
Andrée E Morneault
Keyword(s):  
Growth Rate ◽  
Seedling Growth ◽  
Natural Regeneration ◽  
Seed Mass ◽  
Pinus Strobus ◽  
White Pine ◽  
Eastern White Pine ◽  
Relative Growth ◽  
Early Seedling Growth ◽  
Early Seedling

The strong influence of seed mass on early seedling growth of forest tree species is well established, but the ecological role of intraspecific variation in seed mass on natural regeneration is poorly understood. Wide variation in initial spatial patterns of natural regeneration of eastern white pine (Pinus strobus L.) between managed and undisturbed white pine forests of the Great Lakes region of North America has been attributed to differences in understory light levels and the frequency of substrates suitable for germination and seedling establishment. To explore the potential influence of seed mass on these observed patterns, the interaction of seed mass and light on early growth of white pine was investigated in a greenhouse study. Seedlings of five half-sib families differing in mean seed mass were grown for 8 and 14 weeks under moderate and low light conditions representing managed and undisturbed pine stands, respectively. Family differences in seedling biomass and root system development under each light environment were associated with positive, linear relationships with mean seed mass. Family and seed mass had a comparatively weak influence on biomass partitioning and relative growth rate. Moderate light improved seedling growth regardless of seed mass, but relative expression of seed mass effects on seedling traits was unaffected by light environment. These results suggest differential recruitment of white pine in managed and undisturbed stands is unrelated to variation in seed mass.Key words: biomass allocation, eastern white pine, greenhouse experiment, natural regeneration, relative growth rate, seed mass.

Effects of salinity on seedling emergence and early seedling growth of Irvingia gabonensis (Irvingiaceae)

2017 ◽  
Vol 45 (2) ◽  
pp. 282-295
Author(s):  
R. Vihotogbé ◽  
C. Watson ◽  
R. Glèlè Kakaï ◽  
F. Wichern ◽  
B. Sinsin ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Seedling Emergence ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Irvingia Gabonensis

Emergence and early seedling growth of Phalaris tuberosa

1969 ◽  
Vol 9 (39) ◽  
pp. 422 ◽  
Author(s):  
A Lazenby ◽  
JMA Schiller
Keyword(s):  
Seedling Growth ◽  
New South ◽  
Seedling Emergence ◽  
New South Wales ◽  
Hydrogen Phosphate ◽  
Early Seedling Growth ◽  
South Wales ◽  
Early Seedling ◽  
Red Earth ◽  
Made In

A study was made in seed boxes at Armidale, New South Wales, on a red earth soil, of the effects of two soil tilths (particles<0.3 cm and between 0.6 and 1.25 cm), three seeding depths (surface seeding, 1.25 cm and 2.5 cm), and three levels of applied phosphorus (the equivalents of phosphorus in nil, 378 kg/ha and 756 kg/ha superphosphate, applied as sodium di-hydrogen phosphate) on emergence and early seedling growth of Phalaris tuberosa. Water was made non-limiting as far as practicable. Seedling counts were made every four days until the first harvest, 32 days after sowing. Four fortnightly destructive harvests were made to examine treatment effects on post-emergence seedling growth. Seeding into the fine tilth at a depth of 1.25 cm on the high phosphorus treatment gave the fastest and highest total seedling emergence. Conditions most favourable to immediate post-emergence seedling growth were sowing into a fine seedbed at a depth of 1.25 cm or 2.5 cm in combination with phosphorus ; the rate of seedling growth increased with rate of phosphorus applied.

scholarly journals Composts from Various Municipal Solid Waste Feedstocks Affect Vegetable Crops. I. Emergence and Seedling Growth

1997 ◽  
Vol 122 (3) ◽  
pp. 427-432 ◽  
Author(s):  
Nancy E. Roe ◽  
Peter J. Stoffella ◽  
Donald Graetz
Keyword(s):  
Seedling Growth ◽  
Seedling Emergence ◽  
Vegetable Crops ◽  
Field Soil ◽  
Inhibitory Effects ◽  
Vegetable Crop ◽  
Municipal Solid Wastes ◽  
Early Seedling Growth ◽  
Refuse Derived Fuel ◽  
Early Seedling

The composition of composts derived from municipal solid wastes can affect emergence and seedling growth. Composts consisting of biosolids and yard trimmings [standard compost (SC)] alone or with mixed waste paper (MWP), refuse-derived fuel (RDF), or refuse-derived fuel residuals (RDFR) were evaluated in seedling trays and pots for vegetable crop seedling emergence and growth. In trays, tomato (Lycopersicon esculentum Mill.), cucumber (Cucumis sativus L.), and pepper (Capsicum annuum L.) seedlings emerged faster from a commercial peat-lite mix and from sandy field soil than from the composts. Plants were tallest and shoots were generally heaviest in the peat-lite mix and aged SC and smallest in the field soil. MWP compost generally inhibited early seedling growth more than RDF or RDFR composts. Among the composts, seedlings were tallest and heaviest in SC. In pots, growth of each vegetable was generally greatest in SC, followed by other composts, and lowest in sandy soil. Tomato and pepper seedling emergence was more sensitive to the inhibitory effects of the RDF, RDFR, and MWP composts than cucumber seedling emergence. Fertilizer increased plant growth in each medium except SC, in which cucumber stem diameter was not increased. Adding MWP, RDF, or RDFR to SC generally decreased seedling emergence and growth. The composts prolonged days to emergence and decreased percent emerged seedlings. However, subsequent seedling growth in composts was equal to or greater than seedlings in the peat-lite mix and much greater than those in the sandy field soil.

The Absorption of Fenitrothion During Germination of Stratified and Nonstratified White Pine Seeds and Identification of Metabolites Formed

1975 ◽  
Vol 5 (1) ◽  
pp. 84-89 ◽  
Author(s):  
D. J. Hallett ◽  
R. Greenhalgh ◽  
P. Weinberger ◽  
R. Prasad
Keyword(s):  
Seedling Growth ◽  
Seed Coat ◽  
Parent Compound ◽  
White Pine ◽  
Early Seedling Growth ◽  
Pine Seedlings ◽  
Early Seedling ◽  
Germinated Seeds ◽  
Methyl Phenyl

White pine seeds, P. strobus were treated with a 1.5 × 10−4 M solution of fenitrothion, 0,0-dimethyl-0-(4-nitro-3-methyl-phenyl)-phosphorothioate. The seed coat, endosperm, and embryo were monitored for residues of the insecticide and metabolites during germination and early seedling growth. Absorption and accumulation of fenitrothion, and accumulation of fenitro–oxon, and S-methyl fenitrothion were demonstrated in the endosperm and embryos of germinated seeds and seedlings. Neither the parent compound not its metabolites adversely affected the later development of the pine seedlings.

scholarly journals Response of durum wheat (Triticum durum Desf.) growth to salt and drought stresses

2010 ◽  
Vol 46 (No. 2) ◽  
pp. 54-63 ◽  
Author(s):  
R. Sayar ◽  
H. Bchini ◽  
M. Mosbahi ◽  
H. Khemira
Keyword(s):  
Durum Wheat ◽  
Seedling Growth ◽  
Triticum Durum ◽  
Seedling Emergence ◽  
Early Seedling Growth ◽  
Emergence Rate ◽  
Early Seedling ◽  
Emergence Percentage ◽  
Triticum Durum Desf ◽  
Peg 8000

Two durum wheat (Triticum durum Desf.) cultivars were tested for salt and drought tolerance at germination, seedling emergence and early seedling growth in NaCl and PEG-8000 solutions of different osmotic potentials (&ndash;0.2, &ndash;0.4, &ndash;0.6 and &ndash;0.8 MPa). Daily and final germination and emergence percentage, as well as germination and seedling emergence rate, seedling growth, fresh and dry weight were recorded under controlled conditions. Results showed that germination and emergence rates were delayed by both solutions in both cultivars, but Omrabia showed higher germination and emergence rates than BD290273 in NaCl while BD290273 was less affected by NaCl and PEG solutions at the emergence stage. Sodium chloride had a lesser effect on both cultivars in terms of germination rate, emergence rate, final germination and emergence percentage than did PEG-8000. This conclusively proves that the adverse effect of PEG-8000 on germination, emergence and early seedling growth was due to the osmotic effect rather than to the specific ion. Seedling growth was reduced by both stresses. However, NaCl usually caused less damage than PEG to durum wheat seedlings, suggesting that NaCl and PEG acted through different mechanisms.

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