Seeds vary widely in the sensitivity of germination to oxygen (O2) partial pressure, depending upon the species, temperature, dormancy state and physiological status of the seeds. Most analyses of the O2 sensitivity of germination have focused on final germination percentages and estimated the O2 percentage in air that is required to reduce germination to a given percentage (usually 50%). In co...

Germination is a key process in plants' phenological cycles. Accelerating this process could lead to improvment of the seedling growth as well as the cultivation efficiency. To achieve this, the effect of microwave frequency on the germination of rice seeds was examined. The physiological feedbacks of the MR 219 rice variety in terms of seed germination rate (GR), germination percentage (GP), a...

Spore germination in Saccharomyces cerevisiae is a process in which a quiescent cell begins to divide. During germination, the cell undergoes dramatic changes in cell wall and membrane composition, as well as in gene expression. To understand germination in greater detail, we screened the S. cerevisiae deletion set for germination mutants. Our results identified two genes, TRF4 and ERG6, that a...

Germination of Microsporum gypseum macroconidia was accompanied by the release of alkaline protease, calcium ions, and inorganic phosphate into the germination fluid. The rate of germination was greatest during the first 2 hr, decreasing thereafter. This decrease in rate was accompanied by a decrease in protease activity, which was caused by an interaction of the enzyme with the inorganic phosp...

Bacteria of Bacillus species sporulate upon starvation, and the resultant dormant spores germinate when the environment appears likely to allow the resumption of vegetative growth. Normally, the rates of germination of individual spores in populations are very heterogeneous, and the current work has investigated whether spore-to-spore communication enhances the synchronicity of germination. In ...

We have tested a series of inosine analogs for their effect on germinating B. cereus 569 spores. Our results showed that although inosine (hypoxanthine nucleoside) causes spore germination by itself, the kinetic pathway exhibited complex and strongly cooperative character. Contrary to inosine’s germinating effect, the purine pathway degradation products xanthine, xanthosine, uric acid, hypoxant...

Comparative approaches between native and invasive species germination are useful for understanding invasion success. We studied the role of invasive–native neighboring seeds on germination and early growth of different grasses. We focused on the non-native species Eragrostis plana Ness, the most invasive plant in southern Brazilian grasslands. A germination experiment was performed with three ...

Bottlebrush squirreltail [Elymus elymoides (Raf.) Swezey = Sitanion hystrix (Nutt.) J. G. Smith] and big squirrel-tail [Elymus multisetus (J. G. Smith) M. E. Jones = Sitanion jubatum (J. G. Smith)] have a broad geographical distribution and have been identified as high priority species for restoration of degraded rangelands in the western United States. These rangelands exhibit high annual and ...

Wheat (Triticum aestivum L.) is an important crop worldwide. The physiological deterioration of seeds during storage and seed priming is closely associated with germination, and thus contributes to plant growth and subsequent grain yields. In this study, wheat seeds during different stages of artificial ageing (45°C; 50% relative humidity; 98%, 50%, 20%, and 1% Germination rates) and priming (h...

Abstract: Analyses of germination seeds under artificial stress conditions are tools for a better understanding the survival and adaptation capacity species natural conditions. Therefore, aim this study was to evaluate effect priming on seed germination, breaking dormancy, length Urochloa brizantha seedlings water restriction salt A completely randomized experimental design used with four repli...