کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4528011 | 1625839 | 2012 | 7 صفحه PDF | دانلود رایگان |
The decline of Phragmites australis (Cav.) Steud., a well-known phenomenon in Central and Western Europe, was detected recently also in the Mediterranean Basin. A range of parameters were quantified in healthy and affected stands as a screening for indicators of die-back. These were: stem dimension, density and pattern, starch storage, presence of occlusions in the vessel cells, abnormal lignification and calli in the root parenchyma. First, high stem density, occlusions, lignification and calli did not always coincide with die-back. Second, starch content appeared a reliable indicator. The higher starch amount detected in the healthy stands can be related to the greater ability to perform photosynthesis and accumulate reserves. Furthermore, the starch lack detected in the declining stands might result from the increased starch demand, due to the shoot regeneration connected to the clumped habit.
► Shoot length, diameter and density, rhizome and root anatomy were studied to detect reed die-back.
► The starch storage was studied in declining and healthy stands of reed.
► Reed decline causes reduced starch storage especially in the adventitious roots.
► The starch amount might be used as a reliable indicator of reed decline.
Journal: Aquatic Botany - Volume 103, October 2012, Pages 122–128