e-journal

Seed germination and seedling development ecology in world-wide populations of a circumboreal Tertiary relict

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Abstract.
Background and aims:
Temperate forests are disjunct in the Northern Hemisphere, having become fragmented from
the earlier widespread (Tertiary) boreotropical forest. We asked ‘What are the contemporary
patterns of population variation in ecological traits of a Tertiary relict in a macroecological
context?’. This issue underpins our understanding of variation in populations occurring in
the same biome but on different continents.

Methodology:
We examined characters associated with root and shoot emergences among populations of
Viburnum opulus in temperate forests of Asia, North America and Europe. This species has
complex seedling emergence extending over several years and requiring various temperature
cues.

Principal results:
Populations varied in germination responses and clustered into groups that were only partly
related to varietal status. Whereas roots (at warm temperatures) and shoots (following a cold
period) simultaneously emerged from seeds of all populations when simulated dispersal occurred
in winter, they were delayed in some populations when dispersal occurred in summer.

Conclusions:
Viburnum opulus populations, some separated by 10 300 km, showed high similarity in seedling
development and in germination phenology, and we suggest that stabilizing selection
has played a key role in maintaining similar dormancy mechanisms. Nevertheless, there
was some degree of variation in other germination characters, suggesting local adaptation

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Ketersediaan

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Informasi Detail

Judul Seri

AoB PLANTS

No. Panggil

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Penerbit

Oxford : Oxford University Press., 2012

Deskripsi Fisik

AoB PLANTS 2012: pls007; doi:10.1093/aobpla/pls007

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2012: pls007

Subjek

PEMULIAAN TANAMAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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