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1. Dormancy cycling and persistence of seeds in soil of a cold desert halophyte shrub

Author:
Cao, Dechang; Baskin, Carol C.; Baskin, Jerry M.; Yang, Fan; Huang, Zhenying
Source:
Annals of botany 2014 v.113 no.1 pp. 171-179
ISSN:
0305-7364
Subject:
temperature,   etc   ; buried seeds; cold; cold soils; environmental factors; germination; growing season; halophytes; life history; salt tolerance; seed dormancy; seedling emergence; seedlings; shrubs; summer; viability; water salinity; water stress; woody plants;     Show all 19 Subjects
Abstract:
... Background and Aims Formation of seed banks and dormancy cycling are well known in annual species, but not in woody species. In this study it was hypothesized that the long-lived halophytic cold desert shrub Kalidium gracile has a seed bank and dormancy cycling, which help restrict germination to a favourable time for seedling survival. Methods Fresh seeds were buried in November 2009 and exhumed ...
DOI:
10.1093/aob/mct256
PubMed:
24249808
PubMed Central:
PMC3864727

2. Conditional cold avoidance drives between-population variation in germination behaviour in Calluna vulgaris

Author:
Spindelböck, Joachim P.; Cook, Zoë; Daws, Matthew I.; Heegaard, Einar; Måren, Inger E.; Vandvik, Vigdis
Source:
Annals of botany 2013 v.112 no.5 pp. 801-810
ISSN:
0305-7364
Subject:
temperature,   etc   ; Calluna vulgaris; altitude; cold; cold tolerance; frost; growing season; heathlands; latitude; life history; risk; seed germination; seeds; Norway;     Show all 14 Subjects
Abstract:
... Background and Aims Across their range, widely distributed species are exposed to a variety of climatic and other environmental conditions, and accordingly may display variation in life history strategies. For seed germination in cold climates, two contrasting responses to variation in winter temperature have been documented: first, an increased ability to germinate at low temperatures (cold toler ...
DOI:
10.1093/aob/mct142
PubMed:
23884396
PubMed Central:
PMC3747796

3. Light requirements of Australian tropical vs. cool-temperate rainforest tree species show different relationships with seedling growth and functional traits

Author:
Lusk, Christopher H.; Kelly, Jeff W. G.; Gleason, Sean M.
Source:
Annals of botany 2013 v.111 no.3 pp. 479-488
ISSN:
0305-7364
Subject:
temperature profiles,   etc   ; biomass; cold; correlation; embolism; frost resistance; growing season; indigenous species; interspecific variation; leaf area; photosynthesis; rain forests; sapwood; seedling growth; seedlings; shade tolerance; trees;     Show all 17 Subjects
Abstract:
... Background and Aims A trade-off between shade tolerance and growth in high light is thought to underlie the temporal dynamics of humid forests. On the other hand, it has been suggested that tree species sorting on temperature gradients involves a trade-off between growth rate and cold resistance. Little is known about how these two major trade-offs interact. Methods Seedlings of Australian tropica ...
DOI:
10.1093/aob/mcs289
PubMed:
23264237
PubMed Central:
PMC3579444

4. Exogenous selection shapes germination behaviour and seedling traits of populations at different altitudes in a Senecio hybrid zone

Author:
Ross, Rebecca I. C.; Ågren, J. Arvid; Pannell, John R.
Source:
Annals of botany 2012 v.110 no.7 pp. 1439-1447
ISSN:
0305-7364
Subject:
temperature profiles,   etc   ; Senecio; adaptive radiation; altitude; biomass; cold; crossing; genetic variation; germination; growing season; hybrids; progeny; quantitative traits; seedling growth; seedlings; survival rate; water stress; Sicily;     Show all 18 Subjects
Abstract:
... Background and Aims The Senecio hybrid zone on Mt Etna, Sicily, is characterized by steep altitudinal clines in quantitative traits and genetic variation. Such clines are thought to be maintained by a combination of ‘endogenous’ selection arising from genetic incompatibilities and environment-dependent ‘exogenous’ selection leading to local adaptation. Here, the hypothesis was tested that local ad ...
DOI:
10.1093/aob/mcs211
PubMed:
23071216
PubMed Central:
PMC3489152

5. Effects of a warmer climate on seed germination in the subarctic

Author:
Milbau, Ann; Graae, Bente Jessen; Shevtsova, Anna; Nijs, Ivan
Source:
Annals of botany 2009 v.104 no.2 pp. 287-296
ISSN:
0305-7364
Subject:
soil temperature,   etc   ; snowpack; seedlings; trees; Alnus incana; global warming; dormancy breaking; summer; tundra; Silene; Calamagrostis; Betula pubescens; Vaccinium myrtillus; grasses; seeds; winter; cold soils; cold; seed germination; shrubs; snow; growing season; growth models; Betula nana;     Show all 24 Subjects
Abstract:
... BACKGROUND AND AIMS: In a future warmer subarctic climate, the soil temperatures experienced by dispersed seeds are likely to increase during summer but may decrease during winter due to expected changes in snow depth, duration and quality. Because little is known about the dormancy-breaking and germination requirements of subarctic species, how warming may influence the timing and level of germin ...
DOI:
10.1093/aob/mcp117
PubMed:
19443459
PubMed Central:
PMC2710907