Photosynthetic activity and water use efficiency of dune species: the influence of air temperature on functioning
| Autor: | Loretta Gratani, M. F. Crescente, Laura Varone |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Stomatal conductance
biology Physiology Pancratium maritimum Plant Science Eryngium maritimum biology.organism_classification Horticulture Cakile Botany Water-use efficiency carotenoid content air temperature leaf mass area coastal dune plant species chlorophyll content gas exchange Elymus farctus Ammophila arenaria Transpiration |
| Zdroj: | Photosynthetica. 47:575-585 |
| ISSN: | 1573-9058 0300-3604 |
| Popis: | Differences in leaf traits among the dune species developing along the Latium coast were analysed. Cakile maritima Scop. subsp. maritima, Elymus farctus (Viv.) Runemark ex Melderis subsp. farctus, Ammophila arenaria (L.) Link subsp. australis (Mabille) Lainz, Ononis variegata L., Pancratium maritimum L., Eryngium maritimum L., and Anthemis maritima L. were considered. The considered species showed a similar net photosynthetic rate (P N) and chlorophyll content (Chl) during the year, with a peak from the end of April to the middle of May [13.0±3.6 μmol (CO2) m−2 s−1 and 0.63±0.21 mg g−1, respectively, mean values of the considered species], favoured by air temperature in the range 13.3–17.5°C, and 6% of soil water availability. In June–July, the increase of air temperature (Tmax = 28.4°C), associated with a lower water availability (42 mm, total rainfall of the period) and a 1% of soil water availability determined a significant decrease of P N (59%, mean of the considered species) and Chl (38%), and an increase of the carotenoid (Car)/Chl ratio (59%). The significant correlation between P N and stomatal conductance (g s) (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink