scholarly journals THE INFLUENCE OF GROWTH STIMULANTS AT DIFFERENT CONCENTRATIONS ON GROUND SEED GERMINATION AND SURVIVAL OF SEEDLINGS OF THE MAIN FOREST FORMING SPECIES OF CENTRAL SIBERIA

2016 ◽  
Keyword(s):  
Seed Germination ◽  
Ground Seed ◽  
Central Siberia ◽  
Survival Of Seedlings

Soil heating and germination: investigations using leaf scorch on graminoids and experimental seed burial

2006 ◽  
Vol 15 (4) ◽  
pp. 509 ◽  
Author(s):  
Mark G. Tozer ◽  
Tony D. Auld
Keyword(s):  
Heat Shock ◽  
Seed Germination ◽  
Seedling Survival ◽  
Seedling Emergence ◽  
Weather Conditions ◽  
Subsequent Growth ◽  
Soil Heating ◽  
Soil Level ◽  
Dead Tissue ◽  
Survival Of Seedlings

Burns conducted to reduce fuels are usually carried out under mild weather conditions. This introduces a risk that soil heating will be insufficient to trigger germination in species with a heat-shock requirement. Resprouting graminoids with leaves or culms arising from subterranean meristems can be used to estimate soil heating because the leaf is burnt to soil level and the subterranean tissue is killed to a depth dependent on the level of soil heating. Provided the meristem survives, the length of dead tissue is exposed following subsequent growth. We sought to determine whether the length of dead tissue (scorch length) was correlated with the post-fire recovery of Acacia suaveolens, a fire-sensitive shrub with seed germination dependent on heat shock. The peak emergence depth for this species varies as a function of soil heating: temperatures above 100°C induce seed death whereas temperatures below 60°C do not break dormancy. We found that average scorch length was correlated with average seedling emergence depth. However, experimental burial of scarified (i.e. non-dormant) seeds showed that the peak emergence depth was similar for seeds sown before, after or in the absence of fire. This suggests that post-germination mortality is also depth-dependent, with seedling survival reduced at depths from 0 to 20 mm. The results suggest that survival of seedlings will be enhanced if soil heating is sufficient to promote germination of seeds buried at least 20 mm deep. Scorch lengths on graminoid leaves provide an indication of whether this condition is met.

Microfloral infection and quality deterioration of sunflower seeds as affected by temperature and moisture content during storage and the suitability of the seeds for insect or mite infestation

1993 ◽  
Vol 73 (1) ◽  
pp. 303-313 ◽  
Author(s):  
N. D. G. White ◽  
D. S. Jayas
Keyword(s):  
Fatty Acids ◽  
Seed Germination ◽  
Moisture Content ◽  
Free Fatty Acids ◽  
Sunflower Seed ◽  
Fungal Growth ◽  
Seed Storage ◽  
Fungal Species ◽  
Sunflower Seeds ◽  
Ground Seed

Sunflower seed, cultivar Interstate 7111, was stored at 10, 20, 30, and 40 °C and 35, 45, 55, and 75% RH for up to 12 mo. At 75% RH fungal growth was extensive and free fatty acids (FFA) increased rapidly under all temperature regimes. Based on a threefold increase in FFA (1.5%) seed can be stored for 12 mo: at 6% moisture content (MC) and 30 °C; 7% MC and 20 °C; or 8% MC and 10 °C. Seed germination remained above 80% for 12 mo at 10 and 20 °C and 35, 45, and 55% RH; it declined to 70% at 30 °C and 45% RH, but at 55% RH it fell to 30% at 6 mo and 0% at 12 mo. Seed germination decreased rapidly at 40 °C. The incidence of microfloral infection by Penicillium spp. and Aspergillus spp. directly affected increased FFA, decreased germination, and infection was frequent at > 75% RH and different fungal species predominated at different temperatures. Eight species of stored-product beetles and one species of mite were placed on whole sunflower seed, ground seed, shells, or seed meat. Only Oryzaephilus surinamensis, O. mercator, Tribolium castaneum, and T. confusum multiplied appreciably in 2 mo, mainly on ground seed or seed meat. The Oryzaephilus spp. multiplied as much on sunflower seed as on ground wheat controls. Infestation of sunflower seeds by these pests is likely. Key words: Sunflower seed, storage, free fatty acids, germination, fungi, Insecta, Acari

Establishment of buffel grass, green panic and Siratro from seed broadcast into a speargrass pasture in Southern Queensland

1981 ◽  
Vol 32 (5) ◽  
pp. 749 ◽  
Author(s):  
SJ Cook ◽  
GR Dolby
Keyword(s):  
Seed Germination ◽  
Untreated Control ◽  
Seedling Survival ◽  
Panicum Maximum ◽  
Buffel Grass ◽  
Native Pasture ◽  
And Control ◽  
Germinable Seed ◽  
Main Factor ◽  
Survival Of Seedlings

The establishment and survival of seedlings from pasture seed oversown into a native speargrass (Hetevopogon contortus) pasture were studied in southern Queensland. Lime pelleted and unpelleted seed of buffel grass (Cenchrus ciliaris), green panic (Panicum maximum var, trichoglume) and Siratro (Macroptilium atvopuvpureum) were either sown into a cultivated seedbed or broadcast into native pasture pretreated as follows: untreated control; mown to 3 cm; or killed with herbicide. Buffel grass was sown both as fascicles and as caryopses. Establishment was similar in all oversown seedbeds with seedling numbers accounting for 37 % of the germinable seed sown, compared to 49% in the cultivated seedbed. Pelleting increased establishment where competition was present, the effect being greatest for Siratro and least for buffel grass fascicles. Establishment of buffel grass caryopses was markedly inferior to that of fascicles. Seedling survival rather than seed germination was the main factor influencing the success of the pasture sowing. Less than 1 % of the grass seedlings survived in the mown and control plots, but 38 % survived where competition was controlled by herbicides. Siratro survived equally as well as the grasses in the herbicide-treated plots, but survived markedly better when in competition with native grasses. Surface broadcasting into native pasture is therefore considered a satisfactory, though risky method of establishment for legumes such as Siratro, but not for grasses, unless competition is controlled.

scholarly journals The influence of organic plant material on seed germination and development of Scots pine Pinus sylvestris L. seedlings

2019 ◽  
Vol 80 (2) ◽  
pp. 117-123
Author(s):  
Damian Kwiatkowski ◽  
Krzysztof Słowiński ◽  
Jarosław Knapek
Keyword(s):  
Seed Germination ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Organic Material ◽  
Plant Material ◽  
Germination Rate ◽  
Fold Increase ◽  
Pine Seedlings ◽  
Germination Process ◽  
Survival Of Seedlings

Abstract In this article we analysed the influence of plant-based organic admixtures on the germination process of seeds and the early development of Scots pine Pinus sylvestris L. seedlings. The intensity of dumpin-off diseases within the culture was recorded after applying each of the admixtures. Organic material of nettle Urtica dioica L., softwood litter, hardwood litter and peat were applied to the nursery substrate in two ways, either as an admixture in crushed form or in granulated form. None of the introduced admixtures influenced the germination of seeds or the survival rate of pine seedlings positively. The best results were obtained with a substrate without admixtures used as a control, which is the most common nursery substrate. The worst seed germination rate was observed on the substrate enriched with the organic material from nettles. In pots with granulated organic material from hardwood litter, significantly more seedlings showed signs of post-emergence dermatitis. In all other cases, there was no clear difference between the crushed or granulated admixture in either germination or survival of seedlings. We furthermore demonstrated that the process of granulating plant material leads to an approximately 10-fold increase in the bulk density of the granulated substance, which translates directly into volume reduction.

beta-Glucosidase activities and HCN liberation in unimbibed and imbibed seeds, and the induction of cocklebur seed germination by cyanogenic glycosides

1991 ◽  
Vol 83 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Yohji Esashi ◽  
Shinichi Matsuyama ◽  
Hiroki Ashino ◽  
Maria Ogasawara ◽  
Ryo Hasegawa
Keyword(s):  
Seed Germination ◽  
Cyanogenic Glycosides ◽  
Beta Glucosidase

Allelopathic effect of cumin (Cuminum cyminum L.) on seed germination of three weeds

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
A Soleymanifard ◽  
R Naseri ◽  
A Mirzaei ◽  
H Naserirad
Keyword(s):  
Seed Germination ◽  
Allelopathic Effect ◽  
Cuminum Cyminum

Effects of pre-chilling, incubation temperature and light on seed germination of Saponaria officinalis

Planta Medica ◽  
2015 ◽  
Vol 81 (16) ◽  
Author(s):  
YA Jeon ◽  
HS Lee ◽  
ES Park ◽  
YY Lee ◽  
JS Sung ◽  
...  
Keyword(s):  
Seed Germination ◽  
Incubation Temperature ◽  
Saponaria Officinalis

IMPACT OF FERTILIZERS APPLICATION ON SEED GERMINATION AND SEEDLING GROWTH OF VIGNA RADIATA

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
SUPRIYA DIXIT ◽  
R. K. GUPTA
Keyword(s):  
Seed Germination ◽  
Leaf Area ◽  
Seedling Growth ◽  
Vigna Radiata ◽  
Agricultural Research ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Research Field ◽  
Chemical Fertilizer ◽  
Seedling Length

Currently, a real challenge for the workers in the agricultural research field is to stop or reduce the use of expensive agrochemicals/ chemical fertilizers which are hazardous to the environment as well as human health. Present study was aimed to improve the growth and obtain optimum yield of Vigna crop with eco-friendly, non-toxic way and to reduce the use of agrochemical/chemical fertilizer application in agricultural activities. A pot experiment was conducted to study the effect of chemical fertilizer (DAP) and biofertilizer ( Rhizobium strain) separately and in combination on seed germination and seedling growth (at 30 days) based on morphological parameters such as seedling length (cm), fresh weight (g), dry weight (g) and leaf area (cm)2 of Vigna radiata (L.) Wilczek. After one month (30 Days) observations, it was found that seedling length, fresh and dry weights and leaf area were maximum in T4 and minimum in T15, T7 and T8 favored improved seedling length and leaf area whereas T7, T8, and T9 favored improved fresh and dry weights as compared to control.

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