Lamb’s quarters goosefoot (with scientific name “Chenopodium album L.”) can absorb and purify heavy metals from environment. Cesium is one of pollutant and basic elements. Due to similarity to potassium, it can be absorbed by plants intensively. According to its absorption from the environment, cesium effect on anatomical and ontogenical structure of plant was studied. For this purpose, plant seeds were cultivated by hydroponic method with Hoagland solution and after two months, seedlings were incubated in the cesium chloride solution. Three studying groups were including a- control (irrigating by water) and treatment groups (irrigating by Cesium Chloride2 and 5 mg l-1). Investigations on plants showed that cesium accumulates in their aerial organs. Because of this reason, these organs (aerial organs) were investigated for modifications studies. Observation showed that tissue structures of these organs had not changed at all and only xylems are expanded due to fight against tension and cells store cesium in their vacuole in crystalline shape for fighting against toxic effects of cesium. Increasing cesium concentration causes increasing in xylem and crystalline that will increase absorption of cesium and increases reaction against toxic effects of it. Regarding to the increase of cesium absorption from environment by expanding in xylem systems, this plant can be a potential candidate for phytoremediation of cesium, moreover no damage was observed on plant’s tissue due to composing crystalline, so this plant can be introduced as a sufficient and suitable premeditator for removing toxins caused by cesium effects.
