Several theories exist about the role of anthocyanins in senescing leaves. To elucidate factors contributing to variation in autumn leaf anthocyanin contents among individual trees, we analysed anthocyanins and other leaf traits in 27 individuals of red maple (Acer rubrum L.) over two growing seasons in the context of timing of leaf senescence. Red maple usually turns bright red in the autumn, ...

The accumulation of cryoprotectants and the redistribution of water between body compartments play central roles in the capacity of insects to survive freezing. Aquaporins (AQPs) allow for rapid redistribution of water and small solutes (e.g. glycerol) across the cell membrane and were recently implicated in promoting freeze tolerance. Here, we examined whether aquaporin-like protein abundance ...

For the first time, pre-hibernation sizes of “storage” organs (liver and fat bodies), type, concentration total content reserve substances (glycogen or lipids) in these muscle tissue, their change during freezing freeze tolerant specimens moor frog (Rana arvalis) Siberian population were studied. In autumn, relative weight liver (hepatosomatic index) studied individuals reaches 10%, which is 2–...

Cold deacclimation sensitivity has been cited as an important factor associated with winterkill susceptibility of annual bluegrass (Poa annua L.). Increased potential for this species attributed to higher metabolic activities in response warm winter temperatures. We hypothesized that using plant growth regulators inhibit turfgrass and metabolism during months could potentially suppress prematur...

This study describes the time-course of the accumulation of total soluble proteins (TSPs) and vegetative storage proteins (VSPs) and of the transcripts of cold-inducible (CI) and VSP-encoding genes in taproots of two alfalfa cultivars (AC Caribou and Europe) during their acclimation to natural autumn hardening and overwintering conditions in eastern Canada. The impact of a defoliation in Septem...

Abifract: Ef}ccts of Freezing on Major Arteries • Thirty experiments were performed in dogs to assess the effects of freezing on carotid and femoral arteries. These vessels withstood freezing and thawing without rupture. Blood within the vessels did not clot and was lysed during thawing. Histological changes of vessel walls consisted of early degeneration followed by a reparative process. Occas...

in general, spring cultivation of sugar beet is prevalent, but nowadays because of water sources limitation and also plants low water use efficiency in this time of cultivation, autumn cultivation is growing up. several assessments also have showed that in compare with spring cultivation, autumn cultivation of sugar beet has other benefits including reducing the likelihood of plant disease and ...

In most areas of China, affected by the environment low temperature and high humidity, wind speed sensor direction are frozen cannot output data in autumn, winter or alternation spring. order to solve freezing situation sensor, this paper designs a new type antifreeze sensor. After meteorology performance testing field observation tests, correlation coefficient is demonstrated, curve fitted. Th...

The diurnal variations in surface winds, rain, and clouds over Taiwan are presented for three rainfall regimes: the mei-yu (16 May–15 June), summer (16 July–31 August), and autumn (16 September–15 October). Though the magnitude of diurnal island divergence and convergence is similar under each regime, the diurnal variations of rain and clouds vary considerably between the regimes. These differe...