| Autor: |
Johannes-Günter Kohl, Indra Lippert, Hardy Rolletschek |
| Rok vydání: |
2001 |
| Předmět: |
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| Zdroj: |
Aquatic Botany. 69:359-365 |
| ISSN: |
0304-3770 |
| DOI: |
10.1016/s0304-3770(01)00148-6 |
| Popis: |
Two contrasting ecotypes of Phragmites australis adapted to high (Lake Templiner See: Templ) and low (Lake Parsteiner See: Par1) N supply were investigated regarding the leaf content of photosynthetic pigments. Pigment contents were greatest in middle leaves compared to uppermost (still developing) and lowest leaves (already senescent). The highest content was always yielded by chlorophyll a followed by chlorophyll b >lutein>β-carotene>neoxanthin>violaxanthin>zeaxanthin>antheraxanthin. Pigment patterns were similar when comparing both stands. However, the contents per leaf area (and per dry weight) of all pigments were up to three-fold higher at Templ versus Par1. Differences in N supply are most likely the cause. Although, the productivity of Templ reed was about 10-fold higher than that of Par1, the latter showed a two-fold higher biomass gain per chlorophyll a content (60.8 versus 31.3 g dry weight g −1 chlorophyll a ). This reflects the higher efficiency of the Par1 reed adapted to N-limited growth. It is concluded that site conditions, especially N availability, were determining stand-specific variations in content of photosynthetic pigments. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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