Germination of stratified and non-stratified seeds of red alder at two germination temperatures

Tanaka, Yasuomi; Brotherton, P.; Dobkowski, Alex; Cameron, P. C.

doi:10.1007/bf00029299

Cited by 7 publications

(3 citation statements)

References 5 publications

(6 reference statements)

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“…Low temperature and stratification period results in biochemical changes in seeds that is useful during germination by transforming complicate food material into simpler forms (Malik et al, 2008). Tanaka et al (1991) also reported that during stratification lower temperature enhance germination ability in conifers. Physiological method reduces the rate of enzymatic reactions in the seed and cause distinctive changes i.e.…”

Section: Warm Stratificationmentioning

confidence: 86%

Seed Germination Enhancement through Breaking Seed Dormancy: A Review in Tropical and Temperate Tree Species

Kaur¹,

Singh²,

Monga³

2020

Int.J.Curr.Microbiol.App.Sci

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The most important factor for the success of plantation is readily availability of quality seeds. In favorable climatic conditions with optimum moisture and temperature most of the tree species germinate quickly and in unfavorable conditions some degree of seed dormancy occurs. There are various kinds of dormancy occur in trees species such as; exogenous dormancy due to hard seed coat, seed coat impermeable to water, presences of chemical; endogenous dormancy due to immaturity of embryo, oxidation and presence of inhibitors; and double dormancy which include both seed coat and embryo dormancy. In most of tropical tree seeds, physical dormancy occurred because of hard seed coat whereas temperate trees seeds mainly have physiological dormancy. There are various methods to deal with different kinds of dormancy i.e. through Scarification, Stratification, Chemical, Biological, and Irradiation methods.(I) Scarification which is done in hard seed coated species such as Acacia spp., Albizia lebbeck, Cassia spp., Santalum album, Terminalia arjuna etc. Mechanical scarification and concentrated H₂ SO₄ have been widely used to improve germination of several hard seed species, but the level of seed coat thickness among various species is the reason for different responses to all treatments. (II) Stratification is done to remove physiological and morphological dormancy. Most of the Conifers generally have physiological dormancy, stratification for 0-5˚C for 60-70 days is better to overcome this kind of dormancy. (III) Chemical methods include use of growth regulator and chemicals for dormancy breaking. Growth hormones such as gibberellins, IAA and Kinetin etc. are mostly associated with seed germination and seedling physiology. Among all growth regulators GA 3 is most commonly used for germination enhancement @ 100-200 ppm for 1-2 h in most of the species. KNO 3 is important chemical for germination enhancement in many species such as Acacia nilotica, Melia azedarach etc. (IV) Biological method by passing through digestive tracts of animals like seeds of Acacia senegal and (V) Irradiation method irradiate seeds with like x-rays, light rays, gamma rays etc. So, breaking seed dormancy is necessary for seed germination enhancement in nursery.

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Section: Warm Stratificationmentioning

confidence: 86%

Seed Germination Enhancement through Breaking Seed Dormancy: A Review in Tropical and Temperate Tree Species

Kaur¹,

Singh²,

Monga³

2020

Int.J.Curr.Microbiol.App.Sci

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“…A similar interaction between seed lot and temperature was reported for red alder (Alnus rubra Bong.) (Tanaka et al, 1991). Bevington and Hoyle (1981) reported seed-lot effects in response to different germination temperatures in paper birch.…”

Section: Seed-lot Effectsmentioning

confidence: 97%

Target seed moisture content, chilling and priming pretreatments influence germination temperature response inAlnus glutinosaandBetula pubescens

Atrip

O'Reilly

Bannon

2007

Scandinavian Journal of Forest Research

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The response of common alder [Alnus glutinosa (L.) Gaertn.] and downy birch (Betula pubescens Ehrh.) seeds to germination temperature was examined following chilling and priming. Seeds of two seed lots of each species were subjected to combinations of chilling (4918C) and priming (208C) treatments in fully imbibed (FI) state or a lower target seed moisture content (TMC) level (30% and 35% in alder and birch, respectively). After treatment, the seeds were allowed to germinate for 56 days at constant temperatures of 7.5, 10, 15, 20, 25 or 308C. The response to temperature and pretreatment differed between species, but the effect was consistent in each seed lot within each species. In alder, the TMC seeds germinated well across the full range of temperatures, whereas there was an optimum temperature (22 Á238C) for seeds given the FI pretreatment. Priming had no significant effect on the germination response of the TMC seeds in alder, but priming greatly improved germination in the FI seeds, especially at the lower germination temperatures (optimum 18 Á198C). In contrast, in birch, the TMC seeds germinated better across the full temperature range, but the optimal germination temperature (158C) was the same for all seed pretreatments. Priming improved germination in both the FI and TMC seeds in birch.

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“…For this reason, there has been a renewed interest in examining all phases of nursery culture and seed 1 factors with a view to improving yields in the nursery. Seeds of alder and birch often germinate poorly in the nursery, perhaps in part because of dormancy problems [40,41]. Moist chilling (ca 0−5…”

Section: Introductionmentioning

confidence: 99%

Réponse germinative des graines de l’aulne glutineux et du bouleau pubescent à l’application d’acide gibbérellique et de traitements d’amorçage en combinaison avec du froid

Atrip

O'Reilly

2007

Ann. For. Sci.

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-The effects of seed moisture content (MC), gibberellic acid (GA 3 ) concentration, chilling and priming pretreatments on the germination of common alder (Alnus glutinosa) and downey birch (Betula pubescens) seeds were examined. After treatment, the seeds were allowed to germinate for 42 days at 15• C or 20. Treatment responses were similar at both temperatures and in both species. GA 3 treatment of seeds in fully imbibed (FI) state for 30 days, or at the lower, target moisture content (TMC) for 30−90 days, significantly improved germination, but longer treatment periods reduced it (FI seeds) or had no effect (TMC seeds). Priming for two days improved germination in the FI seeds, but more than 4 days reduced it. Priming for up to 14 days had little effect on the germination of the TMC seeds.

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Germination of stratified and non-stratified seeds of red alder at two germination temperatures

Cited by 7 publications

References 5 publications

Seed Germination Enhancement through Breaking Seed Dormancy: A Review in Tropical and Temperate Tree Species

Seed Germination Enhancement through Breaking Seed Dormancy: A Review in Tropical and Temperate Tree Species

Target seed moisture content, chilling and priming pretreatments influence germination temperature response inAlnus glutinosaandBetula pubescens

Réponse germinative des graines de l’aulne glutineux et du bouleau pubescent à l’application d’acide gibbérellique et de traitements d’amorçage en combinaison avec du froid

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