| Autor: |
Madawala, S, Hartley, S, Gould, KS |
| Předmět: |
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| Zdroj: |
New Zealand Journal of Botany; Sep2014, Vol. 52 Issue 3, p352-364, 13p |
| Abstrakt: |
An ability to tolerate salinity can be critical for plants growing in coastal environments. We hypothesised that differences in salinity tolerance might explain variations in vigour and distribution patterns among four iceplant taxa on the Wellington coast. Growth rates, biomass allocation and quantum efficiencies of photosystem II were compared under three salinity levels forCarpobrotus edulis,Carpobrotus chilensis, Disphyma australeand a hybrid presumed to beC.edulis×D.australe.Carpobrotus eduliswas significantly less tolerant of seawater-strength salinity relative to the other taxa. The data did not support a correlation between salinity tolerance and competitiveness in these iceplants. Chlorophyllafluorescence measurements revealed no permanent adverse impacts on photosynthetic efficiency resulting from long-term exposure to salinity. However, salt-induced growth differences observed among iceplant taxa are probably due to the changes in their photosynthetic capacities. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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