Enhancing the seed germination process of Montezuma cypress (Taxodium mucronatum Ten.)

Abstract Ingestion of seeds by vertebrates may influence seed germination and dispersion. However the mechanisms responsible by these effects and the importance of turtles in these interactions are still poorly understood. This study aims to evaluate how Chelonoidis carbonarius influences the germination process of Leucaena leucocephala using an experiment conducted at the Federal University of Ceará, Fortaleza-CE, Brazil, that simulates the passage of the seeds of this plant through the digestive tract of C. carbonarius: stomach acidic condition and seeds sown in feces. We demonstrated that sowing the seeds in feces of Chelonoidis carbonarius has a negative effect on the germination of Leucaena leucocephala, decreasing the germination speed index of the seeds, while the acidic conditions have a neutral one. This study is a first attempt to understand how turtles and tortoises may influence the seed germination, and the implications of these findings in natural environments deserve further investigations.

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Action of nitric oxide on the physiological potential and biochemical mechanisms of pea seeds

Journal of Seed Science ◽

10.1590/2317-1545v43255048 ◽

2021 ◽

Vol 43 ◽

Author(s):

Marcelo Coelho Sekita ◽

Denise Cunha Fernandes dos Santos Dias ◽

Daniel Teixeira Pinheiro ◽

Aparecida Leonir da Silva ◽

Antônio César Batista Matos ◽

...

Keyword(s):

Nitric Oxide ◽

Seed Germination ◽

Seed Vigor ◽

Water Control ◽

No Donor ◽

Germination Process ◽

Physiological Quality ◽

Pea Seeds ◽

Germination Vigor ◽

Pea Seed

Abstract: Nitric oxide (NO) can act in biochemical pathways of the germination process; however, there is little information about how it acts on the performance of pea seeds. The aim of this study was to evaluate the physiological and biochemical effects of NO on pea seed germination and vigor. Pea seeds cv. Itapuã 600 obtained from three seed lots with different levels of physiological quality were sown in a substrate moistened with water (control) or sodium nitroprusside (SNP) solution, a NO donor (50 μM), to assess germination, vigor, activity of antioxidant enzymes, reactive oxygen species, lipid peroxidation, and amylase activity. NO application does not alter pea seed germination, but it increases vigor. It is more effective in seeds with lower physiological potential. In addition, NO leads to reduction in oxidative stress, favors the translocation of reserves to the embryo, and has potential for use in the treatment of pea seeds to increase seed vigor.

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Effect of Diffusates of Parthenium hysterophorous on Seed Germination of Raphanus sativus L.

Scientific World ◽

10.3126/sw.v7i7.3820 ◽

1970 ◽

Vol 7 (7) ◽

pp. 29-32 ◽

Cited By ~ 3

Author(s):

VR Paudel ◽

VNP Gupta ◽

VP Agarwal

Keyword(s):

Seed Germination ◽

Raphanus Sativus ◽

Correlation Factor ◽

Parthenium Hysterophorus ◽

Indirect Measure ◽

Germination Process ◽

Scientific World ◽

Maximum Inhibition ◽

Negative Role ◽

Level Of Significance

The present investigation focused on the effects of plant and seed diffusates of Parthenium hysterophorus L. on seed germination of Raphanus sativus L. Level of glucose in germinating seeds as an indirect measure of amylase activity was estimated. About 91.66% viable seed of Raphanus sativus were treated in different concentrations of rhizospheric soil diffusates (PD) and germinating seed diffusates (SD) of Parthenium hysterophorus. Both diffusates were found effective to retard and minimize the germination of Raphanus seeds. The maximum inhibition for both cases was found at 100 % concentrations of the diffusates. The correlation analysis revealed the correlation factor - 0.784 between PD concentrations and Raphanus seed germination and that of - 0.889 between SD concentrations and Raphanus seed germination with 5% level of significance. This indicated that the increase in concentrations played negative role in germination process of Raphanus seeds. The results were interpreted in terms of the possible roles of "Parthenin", a sesquiterpene-lactone which is known to be present in Parthenium hysterophorus. Key words: Sesquiterpenes; Allelopathy; Parthenin. DOI: 10.3126/sw.v7i7.3820 Scientific World Vol.7(7) 2009 pp.29-32

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Seed Germination and Physiological Response of Sunflower (Helianthus annuus L.) Cultivars under Saline Conditions

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Horticulture ◽

10.15835/buasmvcn-hort:003817 ◽

2018 ◽

Vol 75 (1) ◽

pp. 4

Author(s):

Carmen BEINSAN ◽

Renata SUMALAN ◽

Giancarla VELICEVICI ◽

Adriana CIULCA ◽

Radu SUMALAN

Keyword(s):

Seed Germination ◽

Helianthus Annuus ◽

Dry Matter ◽

Saline Stress ◽

Free Proline ◽

Radicle Growth ◽

Helianthus Annuus L ◽

Control Seed ◽

Germination Process

The purpose of the experiment was to highlight the germination of sunflower seeds affected by the presence of saline stress and the identification of tolerant genotypes. The biological material was represented by sunflower cvs. (Helianthus annuus L.): Coril, Select, Santiago and Fundulea-206. To simulate the saline conditions, germination solutions of sodium chloride (NaCl) were used with concentrations corresponding to the osmotic pressures -6 and -10 atm and the control seed hydration was performed with distilled water. Determination of seed germination, growth of seedling, percentage of plumules dry matter, chlorophyll content and free proline were performed. The experimental data obtained suppose the existence in the assimilation apparatus of sunflowers seedling subjected to stress a competitive chlorophyll/free proline biosynthesis processes. The experimental results regarding the effect of salinity on seed germination and seedling growth revealed important differences between genotypes. The radicle growth in the germination process were strongly affected by saline excess, with significant differences between cultivars. Saline stress results in significant reductions in the amount of chlorophyll, and high levels of free proline. It can be observed that with the increase of the stress level the percentage of the dry matter increases, indicating an accentuated water deficit.

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Seed germination, hydrothermal time models and the effects of global warming on a threatened high Andean tree species

Seed Science Research ◽

10.1017/s0960258512000189 ◽

2012 ◽

Vol 22 (4) ◽

pp. 287-298 ◽

Cited By ~ 7

Author(s):

Edgar E. Gareca ◽

Filip Vandelook ◽

Milton Fernández ◽

Martin Hermy ◽

Olivier Honnay

Keyword(s):

Global Warming ◽

Seed Germination ◽

Water Availability ◽

Tree Species ◽

Hydrothermal Time ◽

Germination Process ◽

Germination Characteristics ◽

Wide Range ◽

Maximum Temperatures ◽

Insight Into

AbstractSeed germination is a crucial event in a plant's life cycle. Because temperature and water availability are important regulators of seed germination, this process will likely be influenced by global warming. Insight into the germination process under global warming is thus crucial, and requires the study of a wide range of water availability and temperature conditions. As hydrothermal time (HTT) models evaluate seed germination for any combination of water potential and temperature, they can be suitable to predict global warming effects on seed germination. We studied the germination characteristics of the high Andean endemic tree speciesPolylepis besseri(Rosaceae), using HTT models. We were especially interested in the potential effects of global warming on seed germination. Assembly of HTT models forP. besseriwas fairly straightforward due to the lack of a seed dormancy mechanism. The models allowed prediction ofPolylepisgermination under constant and alternating temperatures. Initially, a global warming induced increase in the field minimum and mean temperature will increaseP. besserigermination, but as maximum temperatures rise above the optimum temperature for the species, seed germination will become jeopardized. Effects of global warming on seed germination are currently considerably underexplored. HTT models prove to be useful tools to study a plant species' general germination characteristics, and how they may become affected under global warming. For the endemic mountain tree speciesP. besseri, we predict an increase, followed by a decrease of seed germination under global warming.

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Effects of osmotic priming on dormancy and storability of tomato (Lycopersicon esculentumMill.) seeds

Seed Science Research ◽

10.1017/s0960258500003020 ◽

1996 ◽

Vol 6 (2) ◽

pp. 49-55 ◽

Cited By ~ 22

Author(s):

Yongqing Liu ◽

R. J. Bino ◽

W. J. van der Burg ◽

S. P. C. Groot ◽

H. W. M. Hilhorst

Keyword(s):

Seed Germination ◽

Lycopersicon Esculentum ◽

Ambient Temperature ◽

Untreated Control ◽

Seed Priming ◽

Positive Effects ◽

Germination Process ◽

Controlled Deterioration ◽

Physical Changes ◽

Seed Storability

AbstractFreshly harvested tomato (Lycopersicon esculentumMill, cv. Moneymaker) seeds were osmotically primed for 8 d in −1.0 MPa PEG-6000 solution and dried to about 6% water content for storage. Such so–called ‘fresh PEG priming’ enhanced seed germination and improved seedling performance as compared with the untreated control. Fresh PEG priming neither alleviated seed dormancy nor promoted DNA replication as was the case when seeds were dried upon harvest and subsequently primed in PEG (normal PEG priming). However, the addition of 10 μM GA4+7to the osmotic priming solution triggered replicative DNA synthesis of fresh-priming seeds and further enhanced the germination process. After 5 months of storage in ambient temperature conditions, fresh PEG-primed seeds maintained more positive effects gained from priming, whereas, normal PEG-primed seeds had lost the promoting effects on germination. Normal PEG-primed seeds were much more susceptible to controlled deterioration than fresh PEG-primed seeds. It is suggested that the advancement of germination is negatively correlated with seed storability. The mechanisms of seed priming in relation to nuclear replication activities and physical changes are discussed.

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Effect of Priming Techniques on Seed Germination Characteristics of C. Maxima Duch

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.474-476.36 ◽

2011 ◽

Vol 474-476 ◽

pp. 36-39 ◽

Cited By ~ 1

Author(s):

Yong Dong Sun ◽

Xin Zheng Li ◽

He Lian Yang ◽

Li Sun

Keyword(s):

Polyethylene Glycol ◽

Seed Germination ◽

Seed Priming ◽

Distilled Water ◽

Nacl Solution ◽

Peg 6000 ◽

Germination Process ◽

Germination Characteristics ◽

Successful Technique

The present study was conducted to investigate the effect of seed priming techniques on germination characteristics of C. maxima Duch. cultivar (Beiguan). Treatments were combinations of 3 levels of priming (distilled water, NaCl and PEG6000) and non-priming (control) with 3 replications. Concentrations of NaCl solution were 50, 100, 150, 200 mmol•L-1, and polyethylene glycol (PEG) 6000 were 10%, 20%, 30%, 40%, respectively. Seeds were primed using the above priming materials for 24 hours at 20°C in the dark, respectively. The results showed that different priming techniques could have various effects on germination of Beiguan seeds. Hydropriming (distilled water), NaCl priming and PEG6000 priming (10%) all improved the germination characteristics of Beiguan, compared to the control. NaCl priming was more effective than hydropriming and PEG6000 priming and was the most successful technique in this study. These findings indicated that seed priming techniques could accelerate germination process and were simple and cheap, we should propose these methods to farmers.

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Activation and regulation of primary metabolism during seed germination

Seed Science Research ◽

10.1017/s0960258513000391 ◽

2014 ◽

Vol 24 (1) ◽

pp. 1-15 ◽

Cited By ~ 58

Author(s):

Leah Rosental ◽

Hiroyuki Nonogaki ◽

Aaron Fait

Keyword(s):

Seed Germination ◽

Growth Potential ◽

Mechanical Resistance ◽

Primary Metabolism ◽

Gene Transcript ◽

Seed Biology ◽

Germination Process ◽

Regulation Of Metabolism ◽

Radicle Protrusion ◽

Transcript Profiles

AbstractSeed germination is regulated in a concerted manner that involves generating growth potential in the embryo to overcome the mechanical resistance of the endosperm. The wake-up call of a dry seed includes the reorganization of subcellular structures and the reactivation of metabolism in a dense, oxygen-poor environment. Pools of unbound metabolites and solutes produced by the degradation of storage reserves, including starch, proteins and oils, in the embryo can contribute to the generation of the embryo growth potential and radicle protrusion. Recent genomics studies have contributed a vast amount of data on protein, metabolite and gene transcript profiles during germination, which can be integrated to explore the seed metabolism from water imbibition to radicle protrusion. To what extent are free pools of metabolites relevant to the reorganization of seed metabolism? How is energy built to support embryo growth and radicle protrusion? Elucidating these fundamental questions in seed biology is the key to the understanding of the germination process. Here we have attempted to summarize the recent scientific knowledge to provide a comprehensive description of the ignition, reassembling and regulation of metabolism during seed germination.

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Caracterization of seed germination of Zephyranthes sylvatica (Mart.) Baker (Amarilidacea)

Journal of Seed Science ◽

10.1590/2317-1545v32n2923 ◽

2014 ◽

Vol 36 (2) ◽

pp. 178-185

Author(s):

Mayara Wesley da Silva ◽

Laise Guerra Barbosa ◽

José Eduardo Santos Barboza da Silva ◽

Keylan Silva Guirra ◽

Diego Rangel da Silva Gama ◽

...

Keyword(s):

Salt Stress ◽

Seed Germination ◽

Seedling Emergence ◽

Primary Root ◽

Seed Vigor ◽

Optimum Temperature ◽

Salt Stress Tolerance ◽

Germination Process ◽

The Ideal

Zephyranthes sylvatica is a beautiful lily, endemic from the Brazilian Caatinga. Although it has a great ornamental potential, little is known about this species, especially regarding its seeds germination process. Aiming to characterize the germination of Z. sylvatica seeds, we studied its imbibition curve, optimum temperature and substrate for germination and seedling emergence, osmotic and salt stress tolerance, as well as the tolerance to frosting/ defrosting, which indicates long term cryostorage potential. The germination of Z. sylvatica presents a triphasic model of imbibition, in which the primary root protrusion occurs after 72 hours of imbibition. The ideal conditions for evaluating seed germination of Z. sylvatica is 25 ºC, in paper rolls. These seeds are highly tolerant to osmotic stress, but not to salt stress. Z. sylvatica seeds can be cryopreservated without loss of germination and seed vigor.

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The Effect of Seed Sources Variation and Presowing Treatments on the Seed Germination ofAcacia catechuandElaeocarpus floribundusSpecies in Bangladesh

International Journal of Forestry Research ◽

10.1155/2014/984194 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

Niamjit Das

Keyword(s):

Seed Germination ◽

Hot Water ◽

Cow Dung ◽

Germination Test ◽

Rural Bangladesh ◽

Seed Sources ◽

Germination Process ◽

Germination Success ◽

Acacia Catechu ◽

Source Variation

The seed germination of seed sources and presowing treatments ofAcacia catechuandElaeocarpus floribundusseeds were conducted in the nursery of Bangladesh Agricultural University. The seeds were collected from matured and healthy trees from four different locations in Bangladesh and treated with six presowing methods. The germination test was conducted in polybags with a mixture of topsoil and cow dung in a ratio of 3 : 1. The results of ANOVA showed no significant differences among seed sources but statistically significant differences among the presowing treatments for both species. Thus the presowing methods affected the germination process of seeds, and then the highest germination success was found to be 91.26% in hot water (80°C for 10 min), treatment inAcacia catechuand the highest germination success (89.81%) ofElaeocarpus floribunduswas found in H2SO4treatment followed by 86.35% and 78.42% in treatments with hot water (100°C for 12 min) and scarification. The study also revealed that the interactions between seed source variation and presowing methods effect significantly differed in seed germination percentages. Therefore, it is concluded that hot water treatment can be suggested on seed germination of both species for developing nurseries and rural Bangladesh.

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