Ecophysiological responses of almond (Prunus dulcis) seedlings to cadmium stress
2014
Elloumi, Nada | Zouari, Mohamed | Chaari, Leila | Jomni, Chiraz | Ben Rouina, Bechir | Ben Abdallah, Fergani
Almond (Prunus dulcis L.) seedlings were exposed to 0, 25, 50, 100 and 150 μM of CdCl2 in a solution culture under controlled conditions. The effects of cadmium (Cd) exposure on almond seedlings growth, stomatal architecture, gas exchange and physiological parameters were investigated.Under cadmium stress conditions, significant decrease in fresh and dry weight, length of shoot and chlorophyll content were observed. Stomatal conductance, transpiration and net photosynthetic rates were generally depressed by Cd stress, despite stomatal frequency values and stomatal pore size remained unchanged. Exposure to Cd severely restricted the starch content and increased soluble sugars.
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