Aim Initiation of autumnal leaf senescence is crucial for plant overwintering and ecosystem dynamics. Previous studies have focused on the advanced stages reported that climatic warming delayed senescence, despite fundamental differences among senescence. However, timing onset coloration (DLCO), earliest visual sign has rarely been studied. Here, we assessed response DLCO to temperature. Locati...

• In onion, AcFT1 was more highly expressed in LD and AcFT4 SD, indicating these genes have antagonising roles bulbing. AcFT5 leaf while AcFT6 SD leaf. They may also opposite bulbing Marco. Homologs of beta-fructofuranosidase had different tissue- specific activity bulb tissue for sucrose hydrolysis. Tissue specificity 1-fructosyltransferases indicates that fructans are synthesised source sink ...

We have tested the hypothesis that circadian oscillations in the concentration of cytosolic free calcium ([Ca2+]cyt) can encode information. We imaged oscillations of [Ca2+]cyt in the cotyledons and leaves of Arabidopsis (Arabidopsis thaliana) that have a 24-h period in light/dark cycles and also constant light. The amplitude, phase, and shape of the oscillations of [Ca2+]cyt and [Ca2+]cyt at c...

FPA is a gene that regulates flowering time in Arabidopsis via a pathway that is independent of daylength (the autonomous pathway). Mutations in FPA result in extremely delayed flowering. FPA was identified by means of positional cloning. The predicted FPA protein contains three RNA recognition motifs in the N-terminal region. FPA is expressed most strongly in developing tissues, similar to the...

Dormancy is an important life-history strategy which allows copepods to increase their fitness by delaying growth and reproduction until harsh environmental conditions have ameliorated. For marine species, the primary strategies identified to date include the production of dormant eggs by shallow-water species, and copepodite overwintering in deep-water species. Herein, we describe a third stra...

Predicting the rate of leaf appearance, or phyllochron, aids in understanding and modeling grass development and growth. Nine equations predicting the phyllochron of wheat (Tria'cum aesfivurn L.) were evaluated using field data from a variety of locations, cultivars, and management practices. Each equation is referred to by the last name of the first author; if there is more than one equation b...

Plasma prolactin levels have been measured by radioimmunoassay in 42 calves collected from birth till one year of age. The calves belonged to five breeds : Franqaise-Frisonne-Pie-Noire, Charolais, Limousin, Maine-Anjou and Hereford. Prolactin levels varied according to daylength (r = 0.89), and were influenced by photoperiod as early as one month of age. Mean annual level of prolactin did not d...

Humans retain neurobiological responses to circadian day-night cycles and seasonal changes in daylength in spite of a life-style usually independent of dawn-dusk signals. Seasonality has been documented in many functions, from mood to hormones to gene expression. Research on seasonal affective disorder initiated the first use of timed bright light as therapy, a treatment since extended to non-s...