Photoperiod and Temperature Interact to Affect Viola × wittrockiana Gams. Development
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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 کاملCharacterization of Phytochemicals in Petals of Different Colours From Viola × wittrockiana Gams. and Their Correlation With Antioxidant Activity
A study to establish relationship between the petal colour, extraction solvent, phenolic, flavonoid, anthocyanin content and antioxidant activity in three varieties of Viola × wittrockiana (yellow, red and violet) is reported in this article. Identification and quantification of flavonoids and anthocyanins using HPLC-DAD-ESI-MS is also presented. The antioxidant activity was studied by four dif...
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 ...
متن کاملPhotoperiod, ambient temperature, and food availability interact to affect reproductive and immune function in adult male deer mice (Peromyscus maniculatus).
Winter is often stressful. Increased energetic demands in winter and concurrent reductions in energy availability can lead to an energetic imbalance and compromise survival. To increase the odds of surviving winter, individuals of some nontropical rodent species have evolved mechanisms to enhance immune function in advance of harsh winter conditions. Short day lengths provide a proximate cue fo...
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ژورنال
عنوان ژورنال: HortScience
سال: 1997
ISSN: 0018-5345,2327-9834
DOI: 10.21273/hortsci.32.3.466d