Photophysiology of turion germination inSpirodela polyrhiza (L.)Schleiden. The cause of germination inhibition by overcrowding

1990 ◽  
Vol 32 (6) ◽  
pp. 420-428 ◽  
Author(s):  
K. -J. Appenroth ◽  
Waltraud Hertel ◽  
H. Augsten
Keyword(s):  
Germination Inhibition ◽  
Turion Germination

Germination inhibition by 5,7-dihydroxychromone, a flavanoid decomposition product

1985 ◽  
Vol 4 (1-4) ◽  
pp. 177-180 ◽  
Author(s):  
Gayland F. Spencer ◽  
Larry W. Tjarks
Keyword(s):  
Decomposition Product ◽  
Germination Inhibition

Seed-germination inhibition by volatile alcohols and other compounds associated withAmaranthus palmeri residues

1988 ◽  
Vol 14 (7) ◽  
pp. 1633-1648 ◽  
Author(s):  
Judith M. Bradow ◽  
William J. Connick
Keyword(s):  
Seed Germination ◽  
Germination Inhibition

Biological activity of Pyraclostrobin against Coniella granati causing pomegranate crown rot

Plant Disease ◽  
2021 ◽  
Author(s):  
Xue Yang ◽  
Chun-Yan Gu ◽  
Yang Bai ◽  
Jia-Zhi Sun ◽  
Hao-Yu Zang ◽  
...  
Keyword(s):  
Biological Activity ◽  
Mycelial Growth ◽  
Field Trials ◽  
Crown Rot ◽  
Germination Inhibition ◽  
Control Efficacy ◽  
Intracellular Organelle ◽  
Transmission Electron ◽  
Excellent Control ◽  
Conidium Germination

Pomegranate crown rot caused by Coniellagranati is one of the most severe diseases of pomegranate. To date, no fungicides have been registered for controlling this disease in China. Pyraclostrobin, belonging to strobilurin fungicides, has a broad spectrum of activity against many phytopathogens. In this study, based on the mycelial growth and conidial germination inhibition methods, we investigated the biological activity of pyraclostrobin against C. granati at the presence of 50 μg/mL SHAM using 80 isolates collected from different orchards in China during 2012-2018. The EC50 (50% effective concentration) values ranged from 0.040-0.613 μg/mL for mycelial growth and 0.013-0.110 μg/mL for conidium germination, respectively. Treated with pyraclostrobin, the hyphae morphology changed and conidial production of C. granati decreased significantly. The result of transmission electron microscope showed that treatment of pyraclostrobin could make the cell wall thinner, and lead to ruptured cell membrane and formation of intracellular organelle autophagosomes. The pyraclostrobin showed good protective and curative activities against C. granati on detached pomegranate fruits. In field trials, pyraclostrobin showed excellent control efficacy against this disease in which the treatment of 25% pyraclostrobin EC 1000× provided 92.25% and 92.58% control efficacy in 2019 and 2020, respectively, significantly higher than that of other treatments. Therefore, pyraclostrobin could be a candidate fungicide for the control of pomegranate crown rot.

scholarly journals Small RNA Activity in Archeological Barley Shows Novel Germination Inhibition in Response to Environment

2017 ◽  
Vol 34 (10) ◽  
pp. 2555-2562 ◽  
Author(s):  
Oliver Smith ◽  
Sarah A. Palmer ◽  
Alan J. Clapham ◽  
Pamela Rose ◽  
Yuan Liu ◽  
...  
Keyword(s):  
Small Rna ◽  
Germination Inhibition

Germination Inhibition of Undesirable Seed in the Soil using Microwave Radiation

2006 ◽  
Vol 93 (4) ◽  
pp. 365-373 ◽  
Author(s):  
B. Velázquez-Martí ◽  
C. Gracia-López ◽  
A. Marzal-Domenech
Keyword(s):  
Microwave Radiation ◽  
Germination Inhibition

Screening of Existing and New Boxwood Cultivars for Disease Resistance and In Vitro Fungicide Screening to Manage Boxwood Dieback Caused by Colletotrichum theobromicola

2021 ◽  
Author(s):  
Harleen Kaur ◽  
Monique DeSouza ◽  
Raghuwinder "Raj" Singh
Keyword(s):  
Active Ingredient ◽  
Spore Germination ◽  
Mycelial Growth ◽  
Management Practices ◽  
Management Strategies ◽  
Host Susceptibility ◽  
Germination Inhibition ◽  
Industry Professionals ◽  
The U.S

Boxwood is one of the most common and widely planted perennial ornamentals in both home gardens and commercial landscapes. Recently reported boxwood dieback, a fungal disease caused by Colletotrichum theobromicola, has been spreading at an alarming rate within the U.S. Boxwood breeders, nursery growers, and landscape professionals have shown great concerns regarding the lack of effective management practices. Therefore, the primary objectives of this study were to devise effective disease management strategies including screening cultivars to determine their susceptibility to boxwood dieback and screening various fungicides to determine their effectiveness in managing the disease. Host range studies were conducted by screening a wide variety of boxwood cultivars under greenhouse conditions. Although, boxwood cultivar ‘Little Missy’ showed much delayed symptom expression as compared to rest of the cultivars but none of the 11 cultivars were found to be resistance to boxwood dieback. In vitro screening of nine fungicides was conducted to determine mycelial growth as well as spore germination inhibition of eight isolates of C. theobromicola collected from eight states in the U.S. Of the nine fungicides, difenoconazole+pydiflumetofen showed maximum mycelial growth and spore germination inhibition at 1 ppm active ingredient followed by fluxapyroxad+pyraclostrobin, and pyraclostrobin+boscalid at 5 ppm active ingredient. Azoxystrobin+benzovindiflupyr significantly inhibited mycelial growth at 1 ppm but reduced spore germination at 10 ppm active ingredient. This study provides the boxwood industry professionals with critical and applied information pertaining to host susceptibility and fungicide efficacy to effectively mitigate boxwood dieback and to reduce its further spread.

Determining Bio-herbicidal Potential of Rapeseed, Radish and Turnip Extracts on Germination Inhibition of Cutleaf Ground-Cherry (Physalis angulata L.) Seeds

2005 ◽  
Vol 4 (2) ◽  
pp. 134-137 ◽  
Author(s):  
Mehmet Arslan ◽  
Ilhan Uremis . ◽  
Ahmet Uludag .
Keyword(s):  
Germination Inhibition ◽  
Physalis Angulata

Hardseededness and Germinability of Velvetleaf(Abutilon theophrasti)as Affected by Temperature and Moisture

Weed Science ◽  
1984 ◽  
Vol 32 (1) ◽  
pp. 111-115 ◽  
Author(s):  
Menashe Horowitz ◽  
Ray B. Taylorson
Keyword(s):  
High Temperature ◽  
Heat Exposure ◽  
Abutilon Theophrasti ◽  
Hot Water ◽  
Effect Of Temperature ◽  
Germination Inhibition ◽  
Available Water ◽  
Hard Seeds

Velvetleaf(Abutilon theophrastiMedic. ♯4ABUTH) seeds were exposed to variable moisture and temperatures from 15 to 100 C. As temperature increased, the percent of permeable seeds increased. Soaking 1 h at 70 C reduced hard seeds from 99 to 15 percent. Increased available water increased the effect of temperature on reduction of hard seeds. Thus, immersion in hot water was more effective than dry or humid heat. High temperature acted within a few minutes to reduce hardseededness. Viability of hard seeds was reduced at temperatures above 70 C. Germination of permeable seeds was optimal at 24 to 30 C and declined above 35 C. Germination of permeable seeds decreased after pretreatments above 40 C. Temperature and duration of heat exposure were inversely related to germination inhibition. Recently harvested seeds (3-yr-old) remained hard under alternating 4 to 34 C but became permeable after drying at 34 C. Old seeds (15-yr) did not become permeable after drying.

Sample size requirements to evaluate spore germination inhibition by compost extracts

1996 ◽  
Vol 28 (4-5) ◽  
pp. 519-525 ◽  
Author(s):  
D.S. Yohalem ◽  
R. Voland ◽  
E.V. Nordheim ◽  
R.F. Harris ◽  
J.H. Andrews
Keyword(s):  
Sample Size ◽  
Spore Germination ◽  
Germination Inhibition
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