DETERMINATION OF GERMINATION PERCENTAGE AND GERMINATION INDEX-COLLABORATIVE TRIAL AND RUGGEDNESS TESTING

1995 ◽  
Vol 101 (3) ◽  
pp. 171-173 ◽  
Author(s):  
PREBEN RIIS ◽  
ELLA MEILING ◽  
JØRGEN PEETZ
Keyword(s):  
Germination Percentage ◽  
Germination Index ◽  
Collaborative Trial ◽  
Ruggedness Testing

scholarly journals Physical characterization of Rhipsalis (Cactaceae) fruits and seeds germination in different temperatures and light regimes

2016 ◽  
Vol 76 (2) ◽  
pp. 367-373 ◽  
Author(s):  
A. B. Lone ◽  
R. C. Colombo ◽  
B. L. G. Andrade ◽  
L. S. A. Takahashi ◽  
R. T. Faria
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Light Regimes ◽  
Total Absence ◽  
Germination Characteristics ◽  
Different Temperatures ◽  
Medium Time ◽  
Seeds Germination

Abstract The germination characteristics of the native cactus species are poorly known, being the temperature and the light the factors that the most interferes in that process. Thus, the objective of the present work was to characterize the fruits and evaluate the influence of the temperature and the light in the seed germination of Rhipsalis floccosa, Rhipsalis pilocarpa and Rhipsalis teres. The tested constant temperatures were 15, 20, 25, 30 and 35 °C and the alternate of 20-30 °C and 25-35 °C in a photoperiod of 10 hours, and with determination of the most appropriate temperature, the germination was tested in light absence. The germination percentage, the index of germination speed and medium time of germination were evaluated. For R. floccosa, the highest germination percentage was at 20 °C. For R. pilocarpa and R. teres, the highest germination percentages occurred in 15 °C and 20 °C. There was correlation to germination percentage between the three species, indicating that they had similar germination behavior. Total absence of germination was verified for the three species in condition of light absence. In conclusion, the temperature of 20 °C is the most suitable for the seed germination of R. floccosa. For the species R. pilocarpa and R. teres, the temperatures of 15 and 20 °C are the most suitable.

scholarly journals Enhancement of rice and wheat seed germination and seedling vigor by biocontrol agent, Cladosporium cladosporioides

2020 ◽  
Vol 7 (1) ◽  
pp. 9-15
Author(s):  
Md Touhidul Islam
Keyword(s):  
Seed Germination ◽  
Biocontrol Agent ◽  
Germination Percentage ◽  
Cladosporium Cladosporioides ◽  
Germination Index ◽  
Rice Seed ◽  
Seedling Vigor ◽  
Wheat Seed ◽  
Mean Values ◽  
Vigor Index

The biocontrol agent, Cladosporium cladosporioides, strain BOU1 was used to evaluate the rice and wheat plant growth by germination percentage, germination index, vigor index- I and vigor index-II in rice and wheat seed. All the variables of germination and seedling vigor of rice and wheat were increased by the conidial suspension of C. cladosporioides. The rice seed treated with C. cladosporioides had the highest germination index and vigor index-I with average mean values of 8.2 and 4.5, respectively; while the treated wheat seed showed the highest germination percentage and vigor index- II with average mean values of 80.3 and 0.05, respectively. The research is concluded that the biocontrol agent C. cladosporioides improves seed germination and seedling vigor of wheat and rice, which can finally be converted into superior yield even in adverse conditions. Res. Agric., Livest. Fish.7(1): 09-15, April 2020

Determination of pentachlorophenol (PCP) in waste wood––method comparison by a collaborative trial

Chemosphere ◽  
2002 ◽  
Vol 47 (9) ◽  
pp. 1001-1006 ◽  
Author(s):  
Roland Becker ◽  
Hans-Gerhard Buge ◽  
Tin Win
Keyword(s):  
Method Comparison ◽  
Waste Wood ◽  
Collaborative Trial

Enzyme‐linked immunosorbent (ELISA) determination of aflatoxin B1in peanut butter: Collaborative trial

1988 ◽  
Vol 5 (4) ◽  
pp. 601-608 ◽  
Author(s):  
David N. Mortimer ◽  
Martin J. Shepherd ◽  
John Gilbert ◽  
Colin Clark
Keyword(s):  
Peanut Butter ◽  
Collaborative Trial

scholarly journals Non-chemical treatments to improve the seeds germination and plantlets growth of sessile oak

2021 ◽  
Vol 49 (3) ◽  
pp. 12401
Author(s):  
Rodica HOLONEC ◽  
Oana VIMAN ◽  
Irina M. MORAR ◽  
Steluța SÎNGEORZAN ◽  
Camelia SCHEAU ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Electric Field ◽  
Exposure Time ◽  
Germination Percentage ◽  
Germination Index ◽  
Sessile Oak ◽  
Γ Rays ◽  
Physical Treatments ◽  
Growth Of Seedlings ◽  
Seeds Germination

The current study aimed to investigate the effect of different treatments applied to sessile oak seeds in order to improve the germination features, development and growth of seedlings. The seeds were subjected to electric field, electromagnetic field and γ rays’ treatments. For the electric field study three distinct voltages (10V, 30V and 50V) and three values of exposure time (15 min., 35 min. and 60 min.) were considered. Displaying the seeds in an electric field for 60 minutes increased the germination rate with 58.89%. The highest value for the seedling’s height was obtained when seeds were exposed for 15 minutes at an intensity of 30V. The interaction between the intensity and the timing showed that treating seeds with 30V for 35 minutes improved significantly the seedlings peculiarities. In regard to the electromagnetic field, the seeds were subjected to a single value of electromagnetic field (B=0,4mT; i=0,680 A) and three values of exposure time: 10 min., 20 min. and 30 min. The sessile oak seeds subjected to the electromagnetic field for 20 minutes induced the highest value of germination percentage (90.00%) and germination index (1.81) and those seeds produced plantlets with high diameter (2.69 mm) and with significant differences towards non-treated plants. For γ rays treatments a dosage of 2 Gy induced the highest value of germination percentage (86.67%), of germination index (2.02); of germination energy (7.7); and of germination speed (7.24). A dosage of 6 Gy decreased the values of the same parameters. Our results showed that a dosage of 2 Gy improved also the growth parameters such as plantlets diameter (2.65 mm) and height (11.25 cm). In short, the physical treatments represent an ecological substitute approach towards the chemical substances presently used to improve seeds germination. Using physical treatments for seeds germination and growth of seedlings might be a harmless alternative for environment.

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