The effects of abscisic acid (ABA) addition on cadmium accumulation of two ecotypes of Solanum photeinocarpum

Abstract

The study of the effects of exogenous abscisic acid (ABA) addition on cadmium (Cd) accumulation of two ecotypes (mining and farmland) of Solanum photeinocarpum was operated through a pot experiment. The results showed that the biomass and chlorophyll content of the two ecotypes of S. photeinocarpum increased with increasing ABA concentration. Applying exogenous ABA increased Cd content in the two ecotypes of S. photeinocarpum. The maximum Cd contents in shoots of the two ecotypes of S. photeinocarpum were obtained at 20 μmol/L ABA; shoot Cd contents respectively for the mining and farmland ecotypes were 33.92 and 24.71% higher than those for the control. Applying exogenous ABA also increased Cd extraction by the two ecotypes of S. photeinocarpum, and the highest Cd extraction was obtained at 20 μmol/L ABA with 569.42 μg/plant in shoots of the mining ecotype and 520.51 μg/plant in shoots of the farmland ecotype respectively. Therefore, exogenous ABA can be used for enhancing the Cd extraction ability of S. photeinocarpum, and 20 μmol/L ABA was the optimal dose.

Effects of Exogenous Abscisic Acid on Resistance of Capsella bursa-pastoris Under Salt Stress

“…The plant seedlings were irrigated with 20 mL Hoagland nutrient solution (containing 50 mmol/L NaCl) [2] per pot every two days until the plants were harvested. When C. bursa-pastoris seedlings had grown for 15 days, five concentrations (0, 1, 5, 10 and 20 µmol/L) of ABA [3], with three replicates, were sprayed independently on the leaves of plants. The second and third ABA sprayings occurred at 18 days and 21 days after transplanting, respectively.…”

Effects of Exogenous Abscisic Acid on Photosynthesis of Capsella bursa-pastoris Under Salt Stress

“…The plant seedlings were irrigated with 20 mL Hoagland nutrient solution (containing 50 mmol/L NaCl) [8] per pot every two days until the plants were harvested. When C. bursa-pastoris seedlings had grown for 15 days, five concentrations (0, 1, 5, 10 and 20 µmol/L) of ABA [9], with three replicates, were sprayed independently on the leaves of plants. The second and third ABA sprayings occurred at 18 days and 21 days after transplanting, respectively.…”

Effects of Cutting after Continuous Grafting on Photosynthetic Physiology of Lycopersicon esculentum seedlings under Cadmium Stress

“…At present, there are few studies on the effects of multiple grafting on plant growth, and some studies have been done on Juglans regia [3]. The heavy metal polluted vegetable gardens have affected the production of L. esculentum, especially the cadmium (Cd) [4]. The Cd is the most bio-toxic heavy metal elements, and has strong chemical activity, fluidity and toxicity in the environment, which inhibits the growth of plants, especially in high Cd concentration, and the structure of tissues was obviously deformed [5].…”