Structural and functional response to metal toxicity in aquatic Cyperus alopecuroides Rottb

摘要: Abstract Morpho-anatomical and physiological response of Cyperus alopecuroides Rottb. (Family Cyperaceae), occurring in industrial-polluted water near Sheikhupura, Pakistan, to metal (Ni Cd) stress were examined. Two levels (30 60 mg L −1 ) each Ni Cd maintained during the experiment. Growth development severely affected by both metals, however, was more toxic than Ni, although absorbed readily roots its considerable amount translocated aerial plant parts due mobile nature. In contrast, high retained roots. Specific root physio-anatomical modifications for tolerance found result from leaf turgor potential, accumulation organic osmolytes, enhanced sclerification, aerenchyma formation, while leaves developed bulliform cells stellate parenchyma. be related thick epidermis endodermis, cell formation stem, well leaves. The structural functional toxicity very specific C. depending on type which enabled this species survive successfully metal-polluted wetlands.