Variation in germination response to temperature and salinity in shrubby Atriplex species

Germination response to temperature and salinity was measured for 13 seed accessions of shrubby Atriplex belonging to five species. Optimum germination temperature varied both among and within species, as did maximum germination expressed as percentage of filled seed. All accessions showed depressed...

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Bibliographic Details
Published in:Journal of arid environments 1992-01, Vol.22 (1), p.39-49
Main Authors: Mikhiel, Gamal S., Meyer, Susan E., Pendleton, Rosemary L.
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Autoecology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Plants and fungi
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Summary:Germination response to temperature and salinity was measured for 13 seed accessions of shrubby Atriplex belonging to five species. Optimum germination temperature varied both among and within species, as did maximum germination expressed as percentage of filled seed. All accessions showed depressed germination with increasing salinity at high temperature, while germination percentages at low salt levels frequently exceeded the water control values at intermediate or low temperatures. Within-species variation was not clearly correlated with any habitat attribute. The high degree of variation emphasises that between-species comparisons can only be meaningful if an adequate evaluation of within-species variation is available.
ISSN:0140-1963
1095-922X
DOI:10.1016/S0140-1963(18)30655-4