Temperature and Photoperiod Affect Grafted Cactus Scion Necrosis
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چکیده
منابع مشابه
Temperature and photoperiod interact to affect reproduction and GnRH synthesis in male prairie voles.
Prairie voles (Microtus ochrogaster), like most rodent species, exhibit a phenotypic polymorphism in reproductive response to winter conditions or to short day lengths in the laboratory. Laboratory studies on seasonally breeding species have traditionally focused on the role of photoperiod in modulating reproduction and other seasonal adaptions. However, because animals use proximate environmen...
متن کاملPhotoperiod and temperature affect reproductive and nonreproductive functions in male prairie voles (Microtus ochrogaster).
Adult male prairie voles (Microtus ochrogaster) were housed for 10 wk and exposed to long (16L:8D) or short (8L:16D) photoperiods at 21 degrees or 5 degrees C. Maintenance in short day lengths reduced testicular, epididymal, and seminal vesicle mass and also significantly depressed spermatogenic activity. Cold ambient temperature further suppressed gonadal size in voles exposed to short days. S...
متن کاملTemperature and photoperiod as environmental cues affect body mass and thermoregulation in Chinese bulbuls, Pycnonotus sinensis.
Seasonal changes in temperature and photoperiod are important environmental cues used by small birds to adjust their body mass (Mb) and thermogenesis. However, the relative importance of these cues with respect to seasonal adjustments in Mb and thermogenesis is difficult to distinguish. In particular, the effects of temperature and photoperiod on energy metabolism and thermoregulation are not w...
متن کاملPhotoperiod and temperature interact to affect the GnRH neuronal system of male prairie voles (Microtus ochrogaster).
Individuals of numerous species limit energy expenditure during winter by inhibiting reproduction and other nonessential functions. To time these adaptations appropriately with the annual cycle, animals rely on environmental cues that predict, well in advance, the onset of winter. The most commonly studied environmental factor that animals use to time reproduction is photoperiod. Rodents housed...
متن کاملPhotoperiod and temperature interact to affect immune parameters in adult male deer mice (Peromyscus maniculatus).
Nontropical rodents often experience large seasonal fluctuations in both food availability and energy demands. The energy required for thermoregulation is highest during the winter when food availability may be at an annual minimum. Failure to cope with winter probably accounts, in part, for the increased prevalence of disease and death relative to that in summer. Winter conditions may elevate ...
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ژورنال
عنوان ژورنال: HortTechnology
سال: 1996
ISSN: 1063-0198,1943-7714
DOI: 10.21273/horttech.6.4.393