Seed germination and seedling establishment of two closely relatedSchima species

1982 ◽  
Vol 91 (5) ◽  
pp. 397-407
Author(s):  
Ram Boojh ◽  
P S Ramakrishnan
Keyword(s):  
Seed Germination ◽  
Seedling Establishment

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.

Seed dispersal interactions promoting plant invasions.

2020 ◽  
pp. 90-104
Author(s):  
M. Celeste Díaz Vélez ◽  
Ana E. Ferreras ◽  
Valeria Paiaro
Keyword(s):  
Seed Germination ◽  
Seed Dispersal ◽  
Seedling Establishment ◽  
Native Species ◽  
Native Plants ◽  
Woody Species ◽  
Native Plant ◽  
Invasional Meltdown ◽  
Native Plant Species ◽  
Origin Life

Abstract Animal dispersers are essential for many non-native plants since they facilitate seed movement and might promote seed germination and seedling establishment, thereby increasing their chances of invasion. This chapter reviews the published literature on seed dispersal of non-native plant species by native and/or non-native animals. The following questions are addressed: (i) Are interactions between non-native plants and their animal dispersers evenly studied worldwide? (ii) Which are the distinctive traits (i.e. geographical origin, life form, dispersal strategy and propagule traits) of non-native plants that are dispersed by animals? (iii) Which are the most studied groups of dispersers of non-native plants around the world? (iv) Does the literature provide evidence for the Invasional Meltdown Hypothesis (non-native plant-non-native disperser facilitation)? (v) What is the role of animal dispersers at different stages of the non-native plant regeneration process? Our dataset of 204 articles indicates that geographical distribution of the studies was highly heterogeneous among continents, with the highest number coming from North America and the lowest from Asia and Central America. Most of the non-native plants involved in dispersal studies were woody species from Asia with fleshy fruits dispersed by endozoochory. More than the half of the animal dispersal agents noted were birds, followed by mammals, ants and reptiles. The dominance of bird-dispersal interactions over other animal groups was consistent across geographical regions. Although most of the studies involved only native dispersers, interactions among non-native species were detected, providing support for the existence of invasional meltdown processes. Of the total number of reviewed articles reporting seed removal, 74% evaluated seed dispersal, but only a few studies included seed germination (35.3%), seedling establishment (5.4%) or seed predation (23.5%). Finally, we discuss some research biases and directions for future studies in the area.

Seed Germination and Seedling Establishment of Amazonian Floodplain Trees

2010 ◽  
pp. 259-280 ◽  
Author(s):  
Astrid de Oliveira Wittmann ◽  
Aline Lopes ◽  
Auristela Dos Santos Conserva ◽  
Florian Wittmann ◽  
Maria T. F. Piedade
Keyword(s):  
Seed Germination ◽  
Seedling Establishment

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 Assessing the Potential of Jellyfish as an Organic Soil Amendment to Enhance Seed Germination and Seedling Establishment in Sand Dune Restoration

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 863
Author(s):  
Iraj Emadodin ◽  
Thorsten Reinsch ◽  
Raffaele-Romeo Ockens ◽  
Friedhelm Taube
Keyword(s):  
Seed Germination ◽  
Soil Quality ◽  
Seedling Growth ◽  
Seedling Establishment ◽  
Soil Amendment ◽  
Sand Dune ◽  
Organic Soil ◽  
Soil Restoration ◽  
Fertilizer Treatment ◽  
Dune Restoration

Worldwide, sandy coastlines are affected by extensive wind and water erosion. Both soil quality and periodic drought present major problems for sand dune restoration projects. Hence, soil amendments are needed to improve soil quality and enhance soil restoration efficiency. The jellyfish population has increased in some aquatic ecosystems and is often considered as a nuisance because of their negative impacts on marine ecosystem productivity as well as coastal attractiveness. Thus, development of new products derived from jellyfish biomass has received attention from researchers although utilization is still at a preliminary stage. Herein, our main objective was to test seed germination, seedling establishment, and seedling vitality of annual ryegrass (Lolium multiflorum L.) when supplied with organic soil amendment from two different jellyfish species (Aurelia aurita and Cyanea capillata) in comparison with an unfertilized control and mineral fertilizer treatment. We hypothesized that jellyfish dry matter as an organic soil amendment would improve seed germination and seedling establishment in sand dune environments. Germination and seedling growth experiments were conducted in the laboratory and greenhouse. The results indicate that jellyfish enhanced seedling growth and establishment in sand dune soil significantly (p < 0.05 and p < 0.01) under water scarcity conditions. Therefore, jellyfish may have potential for an auxiliary role in sand dune restoration projects in coastal areas in the future.

Environmental filters and seedling recruitment on a coastal dune in subarctic Quebec (Canada)

1996 ◽  
Vol 74 (9) ◽  
pp. 1507-1513 ◽  
Author(s):  
Gilles Houle
Keyword(s):  
Seed Germination ◽  
Spatial Pattern ◽  
Seedling Establishment ◽  
Seedling Recruitment ◽  
Salt Spray ◽  
Spatial Segregation ◽  
Coastal Dune ◽  
Seedling Mortality ◽  
Environmental Filters ◽  
Dune System

One important factor that often determines the presence of a plant species on a site is propagule availability. Afterwards, abiotic and biotic factors act as a series of filters operating sequentially from the seed to the adult stage, determining the pattern of recruitment. By comparing the spatial pattern of emerging seedlings to those of seed availability and of surviving seedlings, one can determine the relative importance of the environmental filters acting on the seed germination and the seedling establishment phases. On a coastal dune system in subarctic Quebec (Canada), sand accumulation, salt spray, and substrate physicochemistry, all affecting microsite quality for seeds and seedlings, vary along a short topographical gradient. My goal was to determine whether or not conditions changing along this gradient differentially affect the initial stages of population recruitment of two perennial herbaceous species for which adults are segregated along the gradient: Honckenya peploides and Elymus mollis. The spatial pattern of seeds in the seed bank and that of emerging seedlings were not related to one another for either Honckenya or Elymus. However, patterns of surviving seedlings were spatially correlated with those of emerging seedlings. Seed and seedling mortality were not density dependent; they were both spatially variable, although not clinal. These results suggest that the environmental filters acting on the germination stage are those that determine the spatial patterns of recruitment. Spatial segregation along the flank of the foredune between adults of the two species studied thus seems to be maintained in part (and maybe reinforced) by low seed mobility, or low seed retention, and the availability of suitable microsites for seed germination. Population progression towards the upper beach seems to depend mostly on seedling establishment for Honckenya but on clonal growth for Elymus. Keywords: Elymus mollis, Honckenya peploides, Hudson Bay, partial Mantel test, spatial segregation, Whapmagoostui-Kuujjuaraapik.

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