scholarly journals ON THE LIFE-HISTORY OF RHIZOSTOME MEDUSAE. III. ON THE EFFECTS OF TEMPERATURE ON THE STROBILATION OF MASTIGIAS PAPUA

1965 ◽  
Vol 128 (3) ◽  
pp. 493-496 ◽  
Author(s):  
YASUO SUGIURA
Keyword(s):  
Life History ◽  
History Of ◽  
Effects Of Temperature

Effects of temperature, photoperiod and humidity on the life history of Gargaphia decoris

BioControl ◽  
2019 ◽  
Vol 64 (6) ◽  
pp. 633-643
Author(s):  
Cecilia Falla ◽  
Adriana Najar-Rodriguez ◽  
Maria Minor ◽  
Kerry Harrington ◽  
Quentin Paynter ◽  
...  
Keyword(s):  
Life History ◽  
History Of ◽  
Effects Of Temperature

Photoperiod and temperature regulation of the life history of Porphyra columbina (Rhodophyta, Bangiales) from central Chile

1986 ◽  
Vol 64 (9) ◽  
pp. 1867-1872 ◽  
Author(s):  
M. Avila ◽  
B. Santelices ◽  
J. McLachlan
Keyword(s):  
Life History ◽  
Growth Rates ◽  
Temperature Regulation ◽  
Optimum Conditions ◽  
Central Chile ◽  
History Of ◽  
Effects Of Temperature ◽  
Growth And Reproduction

The effects of temperature (10, 15, 20 °C) and photoperiod (8:16, 12:12, 16:8 (hours of light: hours of dark)) on the growth and reproduction of different stages in the life history of Porphyra columbina Montagne were assessed. The conchocelis phase had higher growth rates at 12 h light:12 h dark, 45 μmol m−2 s−1, and 15 °C. Under all the temperatures and photoperiods tested, the conchocelis phase could propagate either by monospores or vegetative fragmentation. Conchosporangia were formed only at 10 °C and 8 h light:16 h dark or at 15 °C and either 8 h light:16 h dark or 12 h light:12 h dark. Long photoperiods inhibited conchosporangia formation at all temperatures tested with the exception of 20 °C and 16 h light:8 h dark, where sporangia was formed once. Conchospores were released when the temperature was decreased (15 to 10 °C) maintaining the photoperiod. Conchospore germination occurred under the three photoperiods and temperatures tested. Growth of juvenile fronds was maximum at 15 °C and either 12 h light:12 h dark or 16 h light:8 h dark. Fronds formed carpospores and spermatia at 15 °C and 16 h light:8 h dark only. With optimum conditions the life history was completed in 60 days. Spermatia had three chromosomes (n = 3).

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