Phytoremediation is a green technology; however, very few species of arid environments have been identified as hyperaccumulators and fast growers. Therefore, a greenhouse experiment was performed to evidence the phytoaccumulation potential of Conocarpus erectus, Syzygium cumini, Populus deltoides and Morus alba at the sapling stage. Six-month-old plant saplings were subjected to control (CK; 0 µM) and cadmium treatments (Cd; CdCl₂; 200 µM). The results depicted that plant growth, dry biomass production (leaf and stem) and chl a, b and carotenoid contents decreased significantly in all four species under Cd treatment; however, the lowest decrease was evidenced in Conocarpus erectus. The concentration of hydrogen peroxide and superoxide radical increased significantly in all four species, with the highest increase observed in Morus alba. Osmolytes production, antioxidant enzymes activity (superoxide dismutase, peroxidase, catalase and ascorbate peroxidase) and Cd accumulation in the leaves, stem and root increased significantly in all four species under Cd treatment, with the highest increase observed in Conocarpus erectus. The translocation factor was >1 in Conocarpus erectus, Syzyngoim cumini and Populus deltoides and was <1 in Morus alba. The study revealed a better Cd tolerance in Conocarpus erectus, which was driven by the effective osmolyte balance and antioxidant enzymes mechanism.

The present investigation was carried out at Horticultural Research Institute, Ayub Agricultural Research Institute, Faisalabad during 2017-2019 to evaluate the effect of different growth regulators on root induction of Date palm suckers. There were six treatments i.e., T0 (Control), T1 (Indol butyric Acid (IBA) @2000 ppm), T2 (IBA@4000 ppm), T3 (Naphthalene Acetic Acid (NAA) @2000 ppm), T4 (NAA@3000), T5 (IBA@2000 ppm + NAA@2000 ppm). Growth regulators significantly affected the survival percentage, number of leaves, leaf length and number of roots plant-1. Results showed that IBA@4000 ppm gave maximum success percentage (76.3%), highest survival percentage after 90 days (43.8%), maximum number of leaves (4.5), highest leaf length (20.6cm) and highest number of roots plant-1 (24.8). In view of these results, it is concluded that IBA can be used @ 4000 ppm for better root induction of Date palm suckers.