Seasonal changes in seed dormancy of <i>Solanum nigrum</i> and <i>Solanum physalifolium</i>

Taab, Alireza; Andersson, Lars

doi:10.1111/j.1365-3180.2008.00674.x

Cited by 20 publications

(22 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Freshly harvested seeds appear to have primary dormancy (Roberts & Lockett, 1978; Keeley & Thullen, 1983), which is released during late autumn and winter. In addition, high temperatures during summer in the field have been shown to induce seed dormancy in S. nigrum (Roberts & Lockett, 1978; Taab & Andersson, 2009). Dry or imbibed seeds often require storage for a period at certain temperatures before they become sensitive to environmental factors that promote germination (Hilhorst & Karssen, 1992).…”

Section: Introductionmentioning

confidence: 99%

“…However, seeds that do not germinate before midsummer subsequently enter a stage of secondary dormancy, probably promoted by high temperatures. In addition, a short‐term dormancy induction has been shown in spring followed by breakage of dormancy, before the main period of strong dormancy induction in summer in S. nigrum (Taab & Andersson, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Based on earlier experiments (Taab & Andersson, 2009), our hypotheses were that low temperatures would release dormancy, while the rate of dormancy induction would increase with temperature. Changes in level of dormancy were assumed to determine the range of temperature permissive for germination.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seed dormancy dynamics and germination characteristics of Solanum nigrum

Taab

Andersson

2009

Weed Research

Self Cite

View full text Add to dashboard Cite

Four experiments were conducted to study seed dormancy and germination requirements in Solanum nigrum. In Expt 1, seeds were stratified at different constant and stepwise rising temperatures and their germinability was tested at three germination regimes at weekly intervals. In Expts 2-4, seeds dry stored at 4°C and stratified at 5 and 15°C were tested at constant temperatures, as well as fluctuating temperatures with constant and increasing amplitudes. Results suggest that the rate of dormancy release increased with increasing temperatures ranging from 4.5 to 18.6°C. However, prolonged stratification at higher temperatures caused subsequent induction of dormancy. When tested at constant temperatures, stratified seeds germinated between 18 and 34°C, with the optimum between 26 and 30°C, while dry-stored seeds showed no germination. Fluctuating temperatures, with amplitudes ranging from 5 to 15°C, promoted germination of seeds from all treatments. The dormancy dynamics and germination characteristics of the species will have implications for its survival and establishment. This information can be used to predict time of emergence and, thus, improve control of the species in weed management systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seed dormancy dynamics and germination characteristics of Solanum nigrum

Taab

Andersson

2009

Weed Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…In our work, the addition of 1 mg L-J of BAP or TDZ to NM medium had no possitive effeet in germination of S. macrocarpon BBS-168 seeds. None of assayed treatments has promoted S. incanum MM-557 germination, whieh eould have lost viability or may suffer seasonal ehanges in seed dormaney as has been deseribed in Solanum nigrum and Solanum physalifolium by Taab and Andersson (2009), who explained the late emergenee of the speeies by a short-lived dormancy induetion. In eonclusion, dormaney and germination are eomplex traits, and under similar storage conditions great differenees for germinatíon rate have been observed in the assayed aecessions of S. melongena and sorne related specíes.…”

Section: Dlscussionmentioning

confidence: 96%

“…In the genus Solanum, donnancy and low gennination rates have be en described in different species (Adebola and Afolayan, 2006;Taab and Andersson, 2009) including sorne accessions of Solanum melongena and related species (Joshua, 1978;Ibrahim et al, 2001;Demir et al, 2005). Thus, seeds of a number of locally cultivated Solanum species are known to emerge slowly, and about 30 days could be needed to attain gennination with percentage rates between 15 and 50% in S. incanum, S. torvum, S. integrifolium, S. surattense, S. khasianum, S. sanitwongsei and hybrids of S. melongena x S. ingrifolium (Ibrahim et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Treatments for Improving Seed Germination in Eggplant and Related Species

Gisbert¹,

Prohens²,

Nuez³

2011

Acta Hortic.

View full text Add to dashboard Cite

Orthodox seeds may present ditTerences in germination due to severa] reasons. Poor seed germination Iimits the use of different species for culture or p]ant breeding.In this work, we tested treatments for improving germination in two cultivars of common eggplant (Solanum melongena) and in six accessions of the related species S. macrocarpon, S. aethiopicum, and S. incanum. With the exception of S. incanum MM-557, which did not germinate, seeds of the other accessions directly had lower final germination percentages when sown in Petri dishes with deep filter paper than those that were pretreated by surface sterilization and sown in nutrient medium; a further increase in the final germination percentages was achieved by addition of 1 mg L-1 GA3 to the medium. The GA3-pretreatment not only increased the final germination percentages but promoted germination also by reducing germination time. Other treatments included stratification of S. macrocarp'on and S. aethiopicum seeds at 4°C for 15 or 30 days, as well as addition of 1 mg L-1 of TDZ and BAP for the BBS-168 accession, but this did not improve germination. The addition of 0.3 mg L-1 fluridone, an inhibitor of carotenoid biosynthesis, that is known to prevent ABA biosynthesis, increased the final germination percentages of S. melongena, S. aethiopicum and S. macrocarpon to a similar degree as GA3. Seeds of S. incanum MM-557 did not respond to this treatment but the hybrid derived from this S. incanum accession with eggplant accession ANS-26 showed high germination percentages (70%, 13 days after sowing) in NM medium with GA 3 , fluridone or both components. These results show that seed treatments can contrihute to improving germination of Solanum accessions with low germination. INTRODUCTIONVegetable crops with orthodox seeds may present differences in germination due to possible dormancy, loss of viability during the conservation conditions, genetic differences among the materials, or aging. Seed dormancy is a condition of plant seeds that prevents germinating under optimal environmental conditions. Dormancy and germination are determined by the co-action of the growth potential of the embryo and the restrainfs imposed by the tissues surrounding it. In nature, dormancy is a mechanism that allows a number of species to survive in particular environments and regulates the time and place of germination to be most favorable for survival.When seeds ripen they may be dormant (primary dormancy) or not dormant, that is, they germinate readily when given the proper environmental conditions of water, temperature, ancl/or other factors. However, seeds that do not have primary dormancy ofien acquire secondary dormancy as they dry.There are three major mechanisms for imposing dormancy: (1) seed coverings that restrict water uptake, embryo expansion, gas permeability, leaching of inhibitors; (2) chemical inhibitors including several growth regulators and (3) morphological aspects such as small or undeveloped embryos. There is considerable evidence that the plant horm...

show abstract