Use of osmotic solutes to control seed germination of rice and common bean in seed health blotter tests

2008 ◽  
Vol 36 (1) ◽  
pp. 66-75 ◽  
Author(s):  
J.C. Machado ◽  
W.M. Coutinho ◽  
R.M. Guimarães ◽  
M.G.G.C. Vieira ◽  
D.F. Ferreira
Keyword(s):  
Seed Germination ◽  
Common Bean ◽  
Control Seed ◽  
Seed Health ◽  
Osmotic Solutes

Comparison of Seed Transmission and Survival of Xanthomonas axonopodis pv. phaseoli and Xanthomonas fuscans subsp. fuscans in Common Bean Seeds

2013 ◽  
Vol 14 (1) ◽  
pp. 41 ◽  
Author(s):  
Y. He ◽  
G. P. Munkvold
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Bacterial Blight ◽  
Disease Incidence ◽  
Seed Transmission ◽  
Common Bacterial Blight ◽  
Phaseolus Vulgaris L ◽  
Transmission Frequency ◽  
Xanthomonas Axonopodis ◽  
Seed Health

Xanthomonas axonopodis pv. phaseoli (Smith) Vauterin (Xap) and Xanthomonas fuscans subsp. fuscans Schaad et al. (Xff) cause indistinguishable symptoms known as common bacterial blight of bean (Phaseolus vulgaris L.). These results confirm a higher disease incidence and seed transmission frequency of Xff compared to Xap and reinforce the need for seed health tests that can differentiate the two species. Accepted for publication 21 August 2013. Published 23 September 2013.

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

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.

Hemp Dogbane Growth and Control

Weed Science ◽  
1972 ◽  
Vol 20 (2) ◽  
pp. 156-159 ◽  
Author(s):  
Laren R. Robison ◽  
Larry S. Jeffery
Keyword(s):  
Seed Germination ◽  
Soil Type ◽  
Vegetative Growth ◽  
Soil Cover ◽  
Seedling Emergence ◽  
Control Seed ◽  
Cover Soil ◽  
And Control ◽  
Emergence Response ◽  
Made In

Hemp dogbane (Apocynum cannabinum L.) was investigated relative to seed germination, depth of seedling emergence, response to clipping, influence of soil type and fertility on vegetative growth, and herbicidal control. Seed germination in this study was influenced by light and scarification. Seedling emergence was influenced by the amount of soil cover. Soil type and fertility affected vegetative growth. In a greenhouse clipping study, hemp dogbane became perennial 41 days after emergence and by 65 days was producing more than one shoot per plant following clipping. Hemp dogbane was more completely controlled following September application of herbicide than from application made in June.

scholarly journals Seed germination of Brazilian Aldama species (Asteraceae)

2015 ◽  
Vol 37 (3) ◽  
pp. 185-191 ◽  
Author(s):  
Aline Bertolosi Bombo ◽  
Tuane Santos de Oliveira ◽  
Beatriz Appezzato-da-Glória ◽  
Ana Dionísia da Luz Coelho Novembre
Keyword(s):  
Seed Germination ◽  
Reproductive Strategies ◽  
Fluorescent Lamp ◽  
Optimal Temperature ◽  
Embryo Viability ◽  
Seed Health ◽  
Sexual Propagation ◽  
Alternating Temperature ◽  
Underground System ◽  
Germinating Seeds

Brazilian samples from the Aldama genus (Asteraceae) could not propagate vegetatively despite their thickened underground system; thus, this study on sexual propagation is critical given the lack of data on reproductive strategies for such species. The aim for this research was to assess the optimal temperature for Aldama arenaria, A. filifolia, A. linearifolia, A. robustaand A. trichophylla seed germination. Seed germination was evaluated at the constant temperatures 20, 25 and 30 °C and the alternating temperatures 15-35, 20-30 and 20-35 °C with an 8-h daily photoperiod, using fluorescent-lamp. The ungerminated seeds were evaluated for embryo viability. The A. filifolia seed health was also evaluated. The optimal temperatures for germination are 20 and 25 °C for Aldama arenaria, A. filifolia, A. robusta and A. trichophylla seeds and 20 °C for A. linearifoliaseeds. The alternating temperature 15-35 °C is not recommended for germinating seeds from these species. The six fungi taxa studied herein did not affect A. filifolia seed germination.

scholarly journals From the Outside to the Inside: New Insights on the Main Factors that Guide the Germination Process

2020 ◽  
Author(s):  
Chiara Longo ◽  
Soyanni Holness ◽  
Veronica De Angelis ◽  
Andrea Lepri ◽  
Sara Occhigrossi ◽  
...  
Keyword(s):  
Life Cycle ◽  
Seed Germination ◽  
Seedling Growth ◽  
Fine Tuning ◽  
Control Network ◽  
Control Seed ◽  
Germination Process ◽  
Main Factors ◽  
External Signals ◽  
Developmental Switch

The transition from a dormant to a germinating seed represents a crucial developmental switch in the life cycle of a plant. Subsequent transition from a germinating seed to an autotrophic organism also requires a robust and multi-layered control. Seed germination and seedling growth are multistep processes, involving both internal and external signals, which lead to a fine-tuning control network.

scholarly journals Seed health of common bean stored at constant moisture and temperature

2008 ◽  
Vol 65 (6) ◽  
pp. 613-619 ◽  
Author(s):  
Fabiana Gonçalves Francisco ◽  
Roberto Usberti
Keyword(s):  
Moisture Content ◽  
Common Bean ◽  
Storage Conditions ◽  
Quality Parameters ◽  
Main Concern ◽  
Fusarium Spp ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Seed Health ◽  
Penicillium Spp

Fungal incidence in stored common bean (Phaseolus vulgaris L.) is the main concern in order to preserve seed health and viability. The main aim of this study was to analyse these quality parameters in hermetically stored seeds at 10.2, 13.1, 16.2, 18.5% moisture content (MC) and 25, 30, 35, 40°C, through seed germination and health tests. Water activity recorded at 10.2 and 18.5% MC were 0.448 and 0.700, respectively. Low seed moisture content reduced Alternaria spp. incidence at 25-30°C. Highest incidence of Fusarium spp. (7.5%) occurred at 16.2% MC and 35-40°C. Highest incidences of Rhizoctonia spp. (8-10%) were recorded at 16.2-18.5% MC and 30-40°C. Penicillium spp. and Aspergillus spp. were predominant throughout the experiment and the highest incidences (80-100%; 20-30%, respectively) were scored at 18.5% MC and 30-35°C and 13.1-18.5% MC at 35°C, respectively. The higher the seed MC the higher the fungi incidence while lower seed MC decreased the incidences by 25%. Storage conditions below 30°C and 13.0% MC appear suitable to preserve common bean seed in relation to viability and health, up to a 8-month period.

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