Summer annuals overwinter as seeds in the soil seed bank. This is facilitated by a cold-induced increase in dormancy during seed maturation followed by a switch to a state during seed imbibition in which cold instead promotes germination. Here, we show that the seed maturation transcriptome in Arabidopsis thaliana is highly temperature sensitive and reveal that low temperature during seed matur...

Abstract: Elucidating the physiological and ecological mechanisms of seed dormancy germination is great significance for species conservation application plant resources. Based on Baskin Baskin’s classification system dormancy, cause in Tarenaya hassleriana (Cleomaceae) seeds was studied using alternating temperature, cold moist stratification, dry storage, GA3 soaking treatment. The results in...

Abstract In degraded forest ecosystems, reintroduction of keystone-woody species is an important step for restoration because it provides regeneration niches. However, lack information on how to propagate restricts the use native species; specially in tropical dry forests where seed germination seasonal and synchronized with onset wet season. We evaluated dormancy-breaking requirements nine fro...

Indole-3-acetic acid (IAA) in highly purified extracts of rose achenes (Rosa rugosa var rubra) was quantified by means of ion-pair reversephase high performance liquid chromatography with spectrofluorimetric detection. Changes in IAA content were determined during a 14-week 4 degrees C stratification, which leads to dormancy breakage, and during subsequent germination at 17 degrees C. IAA was a...

Abstract: Germination of tucumã (Astrocaryum aculeatum G. Mey.) seeds is slow and although the removal endocarp favors speed process, time still considered long. Thus, this study aimed to investigate effects different pretreatment stratification temperatures on germination seeds. Two experiments were set up. The first experiment was conducted using a completely randomized design in factorial sc...

in this investigation, the effect of different treatments on breaking of seed dormancy of almond species and peach seeds include prunus scoparia spach, p. haussknechtii bornm, p. communis l. and p. persica l. was studied to determine their seed germination percentages. first, mature seeds, without endocarp were treated with two percent tmtd® (tetramethylthiuram disulphide) fungicide solution fo...

Seed dormancy is an ecological adaptation that allows seasonal timing of germination for seeds in a population. Several environmental stimuli can trigger dormancy release, the most important being seed moisture content, light and temperature. Of these, temperature is arguably the most important. The objective of this brief review is to consider the various ways temperature impacts seed dormancy...

In climate chamber and outdoor experiments we analysed germination traits of 42 vascular plant species typical of floodmeadows of the alliance Cnidion. In Central Europe such flood-meadows and their highly endangered character species are confined to large lowland river corridors with a dry and warm climate. Due to the prevailing ecological conditions, particularly the extremely high variabilit...

The physiological and biochemical bases of seed dormancy in Lolium rigidum (annual ryegrass) are largely unknown, and study of this process is complicated by the outcrossing nature of the species and the strong influence of environment on seed dormancy. In order to identify heritable biochemical factors contributing to seed dormancy in L. rigidum, seeds from a field-collected population were us...

Grassland prairies of western Oregon and Washington are among the most endangered ecosystems in the United States. Active management and restoration are needed to promote biodiversity in the region. To support plant production for use in habitat restoration, we developed germination protocols for greenhouse propagation of Iris tenax (Oregon iris). Dormancy was most effectively overcome (63% ger...