scholarly journals Cross-Infection Experiments of Psittacanthus schiedeanus: Effects of Host Provenance, Gut Passage, and Host Fate on Mistletoe Seedling Survival

Plant Disease ◽  
2012 ◽  
Vol 96 (6) ◽  
pp. 780-787 ◽  
Author(s):  
María Magdalena Ramírez ◽  
Juan Francisco Ornelas
Keyword(s):  
Seed Germination ◽  
Seedling Establishment ◽  
Seedling Survival ◽  
The Other ◽  
Liquidambar Styraciflua ◽  
Gut Passage ◽  
Host Trees ◽  
Treatment Interaction ◽  
Race Formation ◽  
Full Factorial

Host-specific race formation has been suggested for mistletoe species using cross-dispersal experiments. Here, we tested the effects of host provenance, bird gut passage, and host fate on Psittacanthus schiedeanus seed either manually extracted or bird gut-passed on four host species in Veracruz, Mexico: Acacia pennatula, Liquidambar styraciflua, Platanus mexicana, and Quercus germana. Both groups of seed were placed on the branches of host trees in a full factorial design of cross-inoculation. Bird gut passage had no effect on seed germination, and the only factor having a significant effect on seed germination was host provenance. Results of seedling establishment were similar to those of seed germination, where mistletoe seed inoculated on P. mexicana were more likely to germinate and seedlings to establish than seed inoculated on the other hosts. The significant host provenance–fruit treatment interaction was largely due to a lower seedling establishment of gut-passed seed from P. mexicana to P. mexicana and the other hosts. Although host provenance of mistletoe seed was a significant predictor in germination and seedling establishment, the host provenance–host fate interaction was the only significant predictor for seedling survival. The significant host provenance–host fate interaction was largely due to higher survival success of mistletoe seed from L. styraciflua to L. styraciflua and P. mexicana and from P. mexicana to P. mexicana and a lower success from Q. germana to Q. germana and from A. pennatula to A. pennatula.

scholarly journals Cotyledon integrity on Anadenanthera colubrina (vell.) brenan (fabaceae - mimosoideae) germination and early establishment

CERNE ◽  
2010 ◽  
Vol 16 (2) ◽  
pp. 227-264
Author(s):  
Hisaias de Souza Almeida ◽  
Anne Priscila Dias Gonzaga ◽  
Helaine de Sousa ◽  
Yule Roberta Ferreira Nunes ◽  
Henrique Nery Cipriani
Keyword(s):  
Seed Germination ◽  
Seedling Establishment ◽  
Seedling Survival ◽  
Early Growth ◽  
Forest Species ◽  
Growth Reduction ◽  
Early Seedling ◽  
Growth Of Seedlings ◽  
Early Establishment

Despite the major ecological and economical relevance of forest species, little is known about their seedling establishment and seed germination, as well as the damage effects to seeds at these stages. This work aimed to assess the effects of partial cotyledon loss on the seed germination and early seedling establishment of Anadenanthera colubrina. Therefore, whole (control) and split seeds (with ¹/8, ¹/4, and ½ of their size cut) were evaluated. The seeds were then germinated and the early growth of seedlings was assessed. The treatments had no effect on seed germination, however, they influenced seedling survival and establishment. The highest mortality and growth reduction values were obtained with the most severe cotyledon removal. This indicates that the tegument and the partial cotyledon loss do not represent a barrier against seed germination. However, considerable damages may be detrimental to establishment and survival of A. colubrina seedlings.

Effects of Concrete Content on Seed Germination and Seeding Establishment of Lolium Perenne - An Implication for Vegetation Concrete Matrix Technology

2012 ◽  
Vol 209-211 ◽  
pp. 1027-1031 ◽  
Author(s):  
Yang Xu ◽  
Fang Qing Chen
Keyword(s):  
Seed Germination ◽  
Plant Height ◽  
Ecological Restoration ◽  
Lolium Perenne ◽  
Seedling Growth ◽  
Seedling Establishment ◽  
Seedling Survival ◽  
Germination Rate ◽  
Leaf Number ◽  
Important Species

Lolium perenne is an important species applied in the ecological restoration of slope through vegetation concrete. A controlling experiment was employed which included five level of concrete contents. The changes of germination rate, survival rate, plant height, leaf number and related parameters of root growth under different levels of concrete were determined to uncover the relationship between concrete content and seed germination, seedling establishment. The results shown that the concrete content have significant effects on seed germination and seedling establishment. Seed germination, seedling leaf number, plant height, aboveground biomass, belowground biomass and root length, root crossing number increased with the increasing of concrete content at the range from 0 to 8 %, but decreased sharply when concrete content was over 8%. However, seedling survival decreased all the time with the increasing of concrete content. These results suggested that concrete content had promoting effects on seed germination and seedling growth at the range form 0 to 8%, but had a negative effect on seedling survival. 8 % seem the suitable concrete content for seed germination and seedling growth in the vegetation concrete matrixes. In the specific ecological restoration projects, concrete content should be determined combining with the strength requirements of slope. Concrete content usually should be lower than 8 %. The seeding seeds should be increased when the concrete content had to be over 8 %.

scholarly journals EFFECTS OF WATERING FREQUENCY AND SOIL TYPES ON SEED GERMINATION AND SEEDLING PERFORMANCE OF LESPEDEZA CYRTOBOTRYA AND DIANTHUS BARBATUS

2020 ◽  
Vol 4 (5) ◽  
pp. 80-88
Author(s):  
Ettagbor Hans Enukwa
Keyword(s):  
Water Stress ◽  
Seed Germination ◽  
Plant Height ◽  
Seedling Establishment ◽  
Seedling Survival ◽  
Leaf Number ◽  
Once Daily ◽  
Leaf Mold ◽  
Total Height ◽  
Dianthus Barbatus

This study was carried out to determine the effect of various watering regimes in different soils on seed germination and seedling establishment for two species (Dianthus Barbatus and Lespedeza cyrtobotrya) The ratio of water used for watering was 16ml water/100g soil. Three watering frequencies (i.e. once daily; once every 2 days; once every 3 days) were applied for two soil types (Leaf mold soil and merchantable soil) for a period of 150 days. The differences in seed germination, seedling survival and seedling growth were monitored in all experimental units. A more regular watering frequency increases soil moisture, and vice versa. The results showed that watering frequency had significant effects on seed germination (p=0.008), number of plant leaves (p=0.05), with visible but statistically insignificant effects on mean plant height (p=0.19) and seedling survival (p=0.3) for two plant species. The total height of plant species also varied greatly within treatments. Positive correlations were recorded between germination rate with leaf number (r=0.79, p=0.0001); plant height with survival rate (r=0.65, p=0.001); plant height with leaf number (r=0.77, p=0.0001); survival rate with leaf number (r=0.66, p=0.0001) etc. Seed germination and aboveground heights of D. barbatus and L. cyrtobotrya decreased at the more regular watering frequency of once daily in both soils. On leaf mold soil, the total height and mean height of L. cyrtobotrya decreased with increased water stress at once every 3 days watering frequency. Also, the total height of D. barbatus decreased with increased water stress at once every 3 days watering frequency on this soil, even though its mean height did not decrease. In contrast on merchantable soil, the total height and mean height of L. cyrtobotrya increased with increased water stress at once every 3 days watering frequency, indicating that this plant is more resistant to stress on this soil. Whereas, the total height and mean height of D. barbatus decreased with increased water stress on this soil. On leaf mold soil, once every 2 days watering was the most suitable watering frequency for both species in terms of achieving best seed germination and seedling establishment. In contrast on merchantable soil, once every 3 days watering frequency was most suitable for L. cyrtobotrya, whereas both once every 2 days and once every 3 days watering frequencies were suitable for D. barbatus on this soil. The results suggest that using the required watering frequency and soil type is imperative to ensure sustainability in plant production and seedling establishment.

scholarly journals Influence of Illumination Time and Soil Moisture on Seed Germination and Seedling Establishment of Magnolia sprengeri Pamp.

HortScience ◽  
2021 ◽  
pp. 1-6
Author(s):  
Tong Zhang ◽  
Yingjie Yan ◽  
Chuantong Li ◽  
Junmei Liu ◽  
Dongxue Yin ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Seed Germination ◽  
Seedling Establishment ◽  
Seedling Survival ◽  
Lateral Roots ◽  
Germination Percentage ◽  
Dominant Factor ◽  
Continuous Illumination ◽  
Illumination Time ◽  
Magnolia Sprengeri

This study investigated the effects of illumination time and soil moisture on seed germination and seedling establishment of Magnolia sprengeri Pamp. to improve the seed germination percentage and seedling survival percentage of M. sprengeri. It is of great significance for rapid propagation, seedling regeneration, field management, and artificial high-efficiency cultivation of M. sprengeri. In this study, the seeds of natural M. sprengeri populations from original habitat were used as test materials. Seed germination and seedling establishment of M. sprengeri were performed under different illumination time and soil moisture treatments in artificial climate incubator. The study found that there were significant differences among various key parameters related to seed germination and seedling establishment under different treatments (P < 0.05). Germination percentage, germination potential, germination index, vigor index, germination rate, plant height, number of leaves, base diameter, taproot length, number of lateral roots, maximum lateral root length, single plant leaf area, fresh weight, and seedling survival rate reached the maximum at continuous illumination and 13% of soil moisture, respectively. By the integrative evaluation for the influence of these two factors on seed germination and seedling establishment, soil moisture is a dominant factor affecting seed germination and seedling establishment, whereas illumination is an important promoting factor for seedling establishment of M. sprengeri. Continuous illumination and 13% of soil moisture content is suitable for seed germination and seedling establishment of M. sprengeri.

Achene production, dispersal, seed germination, and seedling establishment of Hieracium aurantiacum in an abandoned field community

1976 ◽  
Vol 54 (11) ◽  
pp. 1189-1197 ◽  
Author(s):  
Basil G. Stergios
Keyword(s):  
Seed Germination ◽  
Seedling Establishment ◽  
Reproductive Output ◽  
Seedling Survival ◽  
Cold Treatment ◽  
Herbaceous Vegetation ◽  
Abandoned Field ◽  
Hieracium Aurantiacum ◽  
Achene Production

Achene dispersal, seed germination, and seedling establishment of Hieracium aurantiacum L. were studied in an 18-year-old abandoned field community. Sexual reproductive output from selected patches declined rapidly after anthesis early in the season. The decrease in the number of achenes produced per head indicated a decline in reproductive output as the season progressed. Most of the achenes collected were deposited within 1 m of the source path. Achenes deposited near the source were larger and had a higher percentage viability than those deposited up to 3 m from the source. Seedling survival was higher within the parent patch compared with that at 5 dm in the adjacent herbaceous vegetation. Germination of the seeds gathered earlier in the season was higher than that of seeds gathered at monthly intervals as the season progressed. Cold treatment enhanced germination of seed produced late in the season but had little effect on seed produced early in the season.

scholarly journals Wildflower Seed Mixes for Alaska

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 867C-867
Author(s):  
Ouina C. Rutledge ◽  
Patricia S. Holloway
Keyword(s):  
Species Richness ◽  
Seed Germination ◽  
Alaska Native ◽  
Seedling Establishment ◽  
Native Species ◽  
Sowing Date ◽  
The Other ◽  
Indigenous Species ◽  
Public Preference ◽  
Species Establishment

The germination, establishment, survival, and public preference of four wild-flower seed mixes were evaluated in relation to irrigation and seasonal sowing date. The mixes included two commercial nonindigenous wildflower mixes, a commercial mix with indigenous and nonindigenous wildflowers, and an experimental mix composed exclusively of Alaska native wildflowers. The two latter mixes were sown with and without `Tundra' glaucous bluegrass (Poa glauca). The two nonindigenous mixes exhibited the greatest seedling establishment during the first season. Fall sowing and irrigation during seed germination significantly increased species establishment for all mixes. In the second season, 11 nonindigenous species did not reappear, whereas all of the indigenous species reappeared. The experimental mix had the greatest species richness of the six mixes in the second season. The addition of grass to the mixes did not significantly affect wildflower species richness in either the first or second season. Survey respondents preferred the nonindigenous wildflower mixes to those containing Alaska native wildflowers because of a greater mix of colors that appeared earlier in the first season than the other mixes. Alaska native species recommended for wildflower mixes include Polemonium acutiflorum, Lupinus arcticus, Hedysarum mackenzii, Arnica alpina, and Aster sibiricus.

scholarly journals Characterization of the Heat-Stable Proteome During Seed Germination in Arabidopsis with Special Focus on LEA Proteins

2021 ◽  
Vol 22 (15) ◽  
pp. 8172
Author(s):  
Orarat Ginsawaeng ◽  
Michal Gorka ◽  
Alexander Erban ◽  
Carolin Heise ◽  
Franziska Brueckner ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seedling Establishment ◽  
Intrinsically Disordered Proteins ◽  
Late Embryogenesis Abundant ◽  
Disordered Proteins ◽  
Similar Proportion ◽  
Special Focus ◽  
Lea Proteins ◽  
Intrinsically Disordered ◽  
Heat Stable

During seed germination, desiccation tolerance is lost in the radicle with progressing radicle protrusion and seedling establishment. This process is accompanied by comprehensive changes in the metabolome and proteome. Germination of Arabidopsis seeds was investigated over 72 h with special focus on the heat-stable proteome including late embryogenesis abundant (LEA) proteins together with changes in primary metabolites. Six metabolites in dry seeds known to be important for seed longevity decreased during germination and seedling establishment, while all other metabolites increased simultaneously with activation of growth and development. Thermo-stable proteins were associated with a multitude of biological processes. In the heat-stable proteome, a relatively similar proportion of fully ordered and fully intrinsically disordered proteins (IDP) was discovered. Highly disordered proteins were found to be associated with functional categories development, protein, RNA and stress. As expected, the majority of LEA proteins decreased during germination and seedling establishment. However, four germination-specific dehydrins were identified, not present in dry seeds. A network analysis of proteins, metabolites and amino acids generated during the course of germination revealed a highly connected LEA protein network.

scholarly journals Effect of NaCl on seed germination in some Centaurium Hill. Species (Gentianaceae)

2007 ◽  
Vol 59 (3) ◽  
pp. 227-231 ◽  
Author(s):  
S. Zivkovic ◽  
M. Devic ◽  
B. Filipovic ◽  
Z. Giba ◽  
D. Grubisic
Keyword(s):  
Life History ◽  
Salt Tolerance ◽  
Seed Germination ◽  
Gibberellic Acid ◽  
White Light ◽  
The Other ◽  
Distilled Water ◽  
Nacl Concentration ◽  
History Of ◽  
Species Specific

The influence of high NaCl concentrations on seed germination in both light and darkness was examined in the species Centaurium pulchellum, C. erythraea, C. littorale, C. spicatum, and C. tenuiflorum. Salt tolerance was found to depend on the life history of the seeds. To be specific, seeds of all five species failed to complete germination when exposed to continuous white light if kept all the time in the presence of 100-200 mM and greater NaCl concentrations. However, when after two weeks NaCl was rinsed from the seeds and the seeds were left in distilled water under white light for an additional two weeks, all species completed germination to a certain extent. The percent of germination not only depended on NaCl concentration in the prior medium, but was also species specific. Thus, seeds of C. pulchellum, C. erythraea, and C. littorale completed germination well almost irrespective of the salt concentration previously experienced. On the other hand, seeds of C. tenuiflorum completed germination poorly if NaCl concentrations in the prior media were greater than 200 mM. When seeds after washing were transferred to darkness for an additional 14 days, they failed to complete germination if previously imbibed on media containing NaCl concentrations greater than 400 mM. However, the seeds of all species, even if previously imbibed at 800 mM NaCl, could be induced to complete germination in darkness by 1 mM gibberellic acid. .

scholarly journals Early development of corn seedlings primed with synthetic tenorite nanofertilizer

2020 ◽  
Vol 42 ◽  
Author(s):  
Michel Esper Neto ◽  
David W. Britt ◽  
Kyle Alan Jackson ◽  
Alessandro Lucca Braccini ◽  
Tadeu Takeyoshi Inoue ◽  
...  
Keyword(s):  
Seed Germination ◽  
Size Effects ◽  
Seed Priming ◽  
Seedling Development ◽  
Cuo Nanoparticles ◽  
The Other ◽  
Corn Seed ◽  
Cu Toxicity ◽  
Germination And Growth

Abstract: Fertilizer formulation alternatives that avoid unnecessary losses and environmental impacts are being investigated in agricultural management. Seed priming with nanofertilizers prior to planting, reduces concerns about non-target dispersion; however, priming formulations and concentrations must be carefully selected to avoid undesired effects. Here, seed germination and seedling development were evaluated after seed priming with CuO nanoparticles (NPs), CuO bulk and CuCl2. The seeds were immersed in priming solutions of 0, 20, 40, 80 and 160 mg.L−1 Cu for the three Cu sources. Following 8 hours priming, the seeds were evaluated for germination and vigor (first germination count). Root and shoot lengths were measured as well as shoot and root dry biomass. The copper NP did not show any toxic effects on corn seed germination and growth, and also promoted higher biomass when compared to the other Cu sources. On the other hand, CuCl2 primed seeds exhibited Cu-toxicity in roots and shoots for all concentrations tested. Bulk Cu priming results indicated the better role of NPs size effects. These findings support NP-seed priming as an alternative to delivery of essential micronutrients, such as copper, to corn seedlings.

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