Integrated effects of acid substratum and heavy metals (copper and cadmium) on red clover
2008
Slepetys, J., Lithuanian Inst. of Agriculture, Akademija, Kedainiai reg. (Lithuania) | Siksnianiene, J., Lithuanian Inst. of Horticulture, Babtai, Kauno reg. (Lithuania) | Brazaityte, A., Lithuanian Inst. of Horticulture, Babtai, Kauno reg. (Lithuania) | Kadziuliene, Z., Lithuanian Inst. of Agriculture, Akademija, Kedainiai reg. (Lithuania) | Duchovskis, P., Lithuanian Inst. of Horticulture, Babtai, Kauno reg. (Lithuania)
The aim of the present work was to study the integrated effects of substratum acidity and heavy metals (copper and cadmium) on the adaptation of red clover (Trifolium pratense L.) cultivar Liepsna at different ambient temperatures in the phytotron of the Lithuanian Institute of Horticulture. Changes in photosynthetic pigment system, plant height and shoot mass were indicators of plant adaptation to unfavourable environmental factors. We identified the number of clover inflorescences, concentration of nitrogen and sulphur in stems, leaves and inflorescences. At temperatures above (27-20 deg C) clover produced a lower shoot mass and was more sensitive to the effect of pollutants and adapted less to this effect than clover growing at optimal temperatures (21-17 deg C). Higher temperature enhanced sulphur accumulation in clover stems and inflorescences. Copper increased shoot mass of clover and acted as a fertilizer at optimal temperature. Copper decreased clover mass at higher temperature. It was established that in many cases after primary effect of pollutants plant photosynthetic pigment system adjusted to any additional effects of other pollutants.
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