Notes on Caribbean Discomycetes. III. Ascospore Germination and Growth in Culture of Nanoscypha tetraspora (Pezizales, Sarcoscyphineae)

Mycologia ◽  
1973 ◽  
Vol 65 (4) ◽  
pp. 952 ◽  
Author(s):  
Donald H. Pfister
Keyword(s):  
Ascospore Germination ◽  
Germination And Growth

Growth of Wallrothiella arceuthobii on artificial media

1970 ◽  
Vol 48 (5) ◽  
pp. 837-838 ◽  
Author(s):  
A. K. Parker
Keyword(s):  
Yeast Extract ◽  
Ascospore Germination ◽  
Germination And Growth

Ascospore germination and growth of Wallrothiella arceuthobii (Peck) Sacc. on artificial media is reported. Germination was enhanced by yeast extract or by increasing the agar content of media. Yeast extract was required to sustain growth.

scholarly journals Survival, Germination, and Growth of Epichloë typhina and Significance of Leaf Wounds and Insects in Infection of Orchardgrass

Plant Disease ◽  
2013 ◽  
Vol 97 (3) ◽  
pp. 323-328 ◽  
Author(s):  
Stephen C. Alderman
Keyword(s):  
Water Potential ◽  
Infection Process ◽  
Effect Of Temperature ◽  
Ascospore Germination ◽  
Eriophyid Mites ◽  
Epichloë Typhina ◽  
Dry Conditions ◽  
Significant Yield ◽  
Germination And Growth ◽  
Germ Tubes

Epichloë typhina is an important stroma-producing endophytic ascomycete that is responsible for significant yield loss in orchardgrass (Dactylis glomerata) seed production fields. Infection is presumed to occur through leaves or stems, although details of the infection process and conditions that favor leaf infection are not well understood. The primary objectives of this study were to investigate the early stages of infection, including the effect of temperature or water potential on ascospore germination and subsequent growth of E. typhina, the tolerance of ascospores to desiccation, the requirement of leaf wounds for infection of orchardgrass by E. typhina, and the potential for insects to facilitate infection. Ascospores tolerated dry conditions, with at least 40% surviving 12 days under desiccation. Germination and growth of E. typhina was greatest at 25°C, with little to no growth at 5 and 35°C. Mycelial growth decreased with decreasing water potential from –0.3 to –10 MPa. Ascospore germination on leaves was predominantly hyphal at wound sites and iterative (conidiogenous) at sites without wounds. E. typhina typically entered leaves through wounds. Direct penetration was rarely observed and appeared to be associated with ascospore clusters. Germ tubes were significantly longer at sites with honeydew deposits from the bird cherry–oat aphid than at sites without honeydew. Growth of E. typhina was also observed at feeding sites of eriophyid mites, suggesting that leaf-wounding or sap-excreting insects support epiphyllous growth of E. typhina on leaves.

Low-temperature requirements for ascospore germination and growth of Hypoxylon diathrauston

1970 ◽  
Vol 48 (12) ◽  
pp. 2223-2225 ◽  
Author(s):  
G. B. Ouellette ◽  
E. W. B. Ward
Keyword(s):  
Low Temperature ◽  
Ascospore Germination ◽  
Temperature Requirements ◽  
Freezing Temperatures ◽  
Germination And Growth ◽  
Germ Tubes

Ascospores of Hypoxylon diathrauston Rehm germinated only at freezing temperatures or required pretreatments at −3 °C to enable them to germinate at 12 °C. They required from 10 to 30 days to germinate in our experiments. They germinated by two, but occasionally one, three, and even four, germ tubes growing through pores in the relatively thick inner wall at each end of the slit after its enlargement. Cultures grew at 0 °C with an optimum at 12–15 °C, and a maximum between 18 and 21 °C.

EFFECTS OF HEAVY METALS ON Lepidium sativum GERMINATION AND GROWTH

2013 ◽  
Vol 12 (4) ◽  
pp. 727-733 ◽  
Author(s):  
Vasile Lucian Pavel ◽  
Dana Luminita Sobariu ◽  
Mariana Diaconu ◽  
Florian Statescu ◽  
Maria Gavrilescu
Keyword(s):  
Heavy Metals ◽  
Lepidium Sativum ◽  
Germination And Growth

Environmental factors can affect the germination and growth of Parthenium hysterophorus and Rumex crispus

2019 ◽  
Vol 51 (6) ◽  
Author(s):  
Muhammad Azim Khan ◽  
Shaheen Kashmir ◽  
Hafiz Haider Ali ◽  
Bakhtiar Gul ◽  
Ali Raza ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Parthenium Hysterophorus ◽  
Rumex Crispus ◽  
Germination And Growth
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