Hormones in Seed Dormancy and Germination

Lewak, Stanisław

doi:10.1007/978-94-009-5139-6_3

Cited by 8 publications

(3 citation statements)

References 106 publications

(83 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After-ripening can be defined as any changes that occur in seeds in the dry state (not imbibed) post-dispersal that cause or improve germination (see Figure 1). The term after-ripening, which has been applied to changes during dry storage [20,114,115], has also been used to describe changes during seed storage under either dry or moist conditions [116]. However, seed storage in the imbibed state, usually at low temperatures, is called stratification [114].…”

Section: The Effects Of Post-dispersal Factors On Seed Dormancy: Afte...mentioning

confidence: 99%

Environmental Regulation of Weed Seed Dormancy and Germination

Qaderi

2023

Seeds

View full text Add to dashboard Cite

Many weeds produce dormant seeds that are unable to complete germination under favourable conditions. There are two types of seed dormancy: primary dormancy (innate dormancy), in which seeds are in a dormant state upon release from the parent plant, and secondary dormancy (induced dormancy), in which dormancy develops in seeds through some experience after release from the parent plant. Mechanisms of seed dormancy are categorized as embryo dormancy and coat-imposed dormancy. In embryo dormancy, the control of dormancy resides within the embryo itself, and in coat-imposed dormancy, it is maintained by the structures enclosing the embryo. Many factors can influence seed dormancy during development and after dispersal; they can be abiotic, biotic, or a combination of both. Most weeds deposit a large number of seeds in the seed bank, which can be one of two types—transient or persistent. In the transient type, all viable seeds in the soil germinate or die within one year, and there is no carry-over until a new crop is deposited. In the persistent type, at least some seeds survive in the soil for more than one year and there is always some carry-over until a new crop is deposited. Some dormant seeds require after-ripening—changes in dry seeds that cause or improve germination. Nondormant, viable seeds can germinate if they encounter appropriate conditions. In the face of climate change, including global warming, some weeds produce a large proportion of nondormant seeds, which germinate shortly after dispersal, and a smaller, more transient seed bank. Further studies are required to explore this phenomenon.

show abstract

Section: The Effects Of Post-dispersal Factors On Seed Dormancy: Afte...mentioning

confidence: 99%

Environmental Regulation of Weed Seed Dormancy and Germination

Qaderi

2023

Seeds

View full text Add to dashboard Cite

show abstract

“…The physiological significance of gibberellins in seed germination is well established; some more recent aspects have been reviewed and discussed in view of gibberellin-deficient mutants (Karssen & Lacka, 1986). A general survey on plant hormones in seed dormancy and germination is given by Lewak (1985).…”

Section: Biological Propertiesmentioning

confidence: 99%

Fungal Gibberellin Production

Brueckner

Blechschmidt

Sembdner

et al. 1989

Biotechnology of Vitamins, Pigments and Growth Factors

View full text Add to dashboard Cite

“…So far, the roles of ABA (abscisic acid) and of gibberellins have been recognized in the initiation and cessation of growth, weakening of endosperm and mobilization of reserves, or in counteracting these processes (Webb et al, 1973a, b;Karssen et al, 1983;Symons et al, 1984;Schopfer and Plachy, 1985 (Lewak et aG, 1975; Lewak and Rudnicki, 1977;Esashi et al, 1979;Roos, 1980;Pradet, 1982;K6hler and Hecker, 1985). Lewak, 1978;Come, 1980/ 1981; Bulard and Le Page-Degivry, 1986;Haliriska etal., 1987 (Bartley and Frankland, 1985;Probert et al, 1985a, b;Marbach and Mayer, 1985;Hilton, 1987 apple cultivars Golden Delicious and Antonovka (Durand et aG, 1975;Tissaoui and Come, 1975;Isaia and Bulard, 1978;Lewak, 1984;Bulard, 1985;Haliriska et al, 1987), Acer (Nikolaeva, 1967;Szczotka and Tomaszewska, 1979;Pinfield and Dungey, 1985;Szczotka, 1988), Corylus (Bradbeer, 1968(Bradbeer, , 1988, Fraxinus (Sondheimer and Galson, 1966) and some other species.…”

Section: Recent Trends In Seed Physiologymentioning

confidence: 99%

Physiological aspects of seed conservation

Suszka¹

1989

Ann. For. Sci.

View full text Add to dashboard Cite

IntroductionSeeds of most woody-plant species are dormant when fully ripe; germination and seedling formation assumes breaking of this dormancy. Preservation of seed viability by proper conservation generally does not contribute to dormancy breaking.After storage, seeds can be as dormant as they were before storage was started. However, whether dormancy is broken before, during or after storage -breaking of dormancy and conservation of seeds should not be regarded separately. Seedling production is not possible from dormant seeds if both dormancy and the tendency to lose viability are not dealt with by proper treatments. We cannot discuss conservation of seeds leaving their dormancy aside. Storage of non-dormant seeds is, except for 'recalcitrant' seeds, much easier. Recent trends in seed physiologyIn the last few decades, intensive work has been conducted to understand better ! I would like to express my thanks to Prof. S Lewak, lnsti ! some basic facts and processes occurring during the development of seeds when they are still on the mother plant and later, after separation from it, in the period be- (Lewak et aG, 1975;Lewak and Rudnicki, 1977;Esashi et al., 1979;Roos, 1980;Pradet, 1982;K6hler and Hecker, 1985). (Tyszkiewicz, 1949;Rohmeder, 1951Rohmeder, , 1953Holmes and Buszewicz, 1956; Sch6nborn, 1964;Buszewicz, 1967;Vlase, 1969;Machanicek, 1973;Suszka, 1974; Muller, 1975, 1977;Bonner, 1978;Suszka and Tylkowski, 1980;Suszka and Kluczyriska, 1980; Muller and Bonnet-Masimbert, 1985;Muller, 1986;Bonner and Vozzo, 1987;Suszka, 1982Suszka, , 1988Wang, 1982) (Nelubov, 1925;Piskarev, 1937;Flemion, 1938;Krzeszkiewicz, 1939;Tyszkiewicz, 1939;Lakon, 1950;Lakon and Bulat, 1952;Bulat and Lindenbein, 1961 ), methods of X-ray testing (Simak, 1957;Simak and Kamra, 1963;Belcher, 1974;Chavagnat, 1984), studies on frost tolerance of seeds in connection with their hydration level (Zakhariev and Tsonev, 1958; Sch6nborn, 1964) and studies on the mutual interactions between various thermal conditions causing germination or induction of a new dormancy in seeds (Haut, 1938; Barton, 1931, 1953;Nikolaeva, 1967Nikolaeva, , 1977Suszka, 1976;Edwards, 1986 Presowing treatment of dormant 'orthodox' seeds without any medium (naked stratification) (Fig. 1 (Edwards, 1982(Edwards, , 1986 or of fruit tree species from the subfamilies Pomoidae and Prunoidae of the Rosaceae family (Crocker and Barton, 1931;Haut, 1932;Stepanov, 1955;Visser, 1956;Decourtye and Brian, 1967;Kaminski and Rom, 1973 (Suszka, 1975

show abstract

Hormones in Seed Dormancy and Germination

Cited by 8 publications

References 106 publications

Environmental Regulation of Weed Seed Dormancy and Germination

Environmental Regulation of Weed Seed Dormancy and Germination

Fungal Gibberellin Production

Physiological aspects of seed conservation

Contact Info

Product

Resources

About