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  • Hydrogen sulfide alleviates lead-induced photosynthetic and ultrastructural changes in oilseed rape.

Hydrogen sulfide alleviates lead-induced photosynthetic and ultrastructural changes in oilseed rape.

Ecotoxicology and environmental safety (2014-03-04)
B Ali, W J Song, W Z Hu, X N Luo, R A Gill, J Wang, W J Zhou
ABSTRACT

The role of hydrogen sulfide (H2S) in alleviating lead (Pb) induced stress in oilseed rape (Brassica napus L.) was studied under laboratory conditions. Plants were grown hydroponically in greenhouse conditions under three levels (0, 100, and 400 µM) of Pb and three levels (0, 100 and 200 µM) of H2S donor, sodium hydrosulfide (NaHS). Application of H2S significantly improved the plant growth, root morphology, chlorophyll contents and photosynthetic activity in leaves of B. napus under Pb stress. Moreover, exogenously applied H2S significantly lowered the Pb concentration in shoots and roots of plants under Pb stress. The microscopic examination indicated that application of exogenous H2S enabled a clean mesophyll cell having a well developed chloroplast with thylakoid membranes and starch grains. A number of modifications could be observed in root tip cell i.e. mature mitochondria, long endoplasmic reticulum and golgibodies under combined application of H2S and Pb. On the basis of these findings, it can be concluded that application of exogenous H2S has a protective role on plant growth, net photosynthesis rate and ultrastructural changes in B. napus plants under high Pb exposures.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Lead, powder, −100 mesh, 99.95% trace metals basis
Sigma-Aldrich
Lead, shot, 1-3 mm, 99.995% trace metals basis
Sigma-Aldrich
Lead, shot, <2 mm, 99.9% trace metals basis
Lead, foil, not light tested, 25x25mm, thickness 0.0125mm, 99.99+%
Lead, foil, light tested, 50x50mm, thickness 0.05mm, as rolled, 97% (Sn 1.5%, Sb 1.5%)
Lead, foil, 1m coil, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 25mm disks, thickness 0.03mm, 99.99+%
Lead, foil, 1m coil, thickness 0.1mm, as rolled, 99.95%
Lead, foil, 15mm disks, thickness 0.25mm, as rolled, 99.95%
Lead, foil, 15mm disks, thickness 0.55mm, as rolled, 100%
Lead, foil, 0.5m coil, thickness 0.05mm, as rolled, 97% (sn 1.5%, sb 1.5%)
Lead, foil, 10mm disks, thickness 0.04mm, 99.99+%
Lead, foil, 10mm disks, thickness 0.007mm, 99.99+%
Lead, foil, 15mm disks, thickness 0.02mm, 99.99+%
Lead, wire reel, 2m, diameter 1.0mm, as drawn, 99.99+%
Lead, foil, 250x250mm, thickness 3.0mm, as rolled, 99.95%
Lead, foil, 6mm disks, thickness 0.05mm, 99.99+%
Lead, foil, 25x25mm, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 50mm disks, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 6mm disks, thickness 0.008mm, 99.99+%
Lead, foil, 100x100mm, thickness 1.0mm, as rolled, 99.95%
Lead, foil, 100x100mm, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 100x100mm, thickness 1.5mm, as rolled, 99.99+%
Lead, foil, 25x25mm, thickness 3.0mm, as rolled, 99.99+%
Lead, foil, 6mm disks, thickness 0.125mm, as rolled, 99.95%
Lead, foil, 100x100mm, thickness 0.1mm, as rolled, 99.95%
Lead, foil, 25x25mm, thickness 1.0mm, as rolled, 99.95%
Lead, foil, 150x150mm, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 8mm disks, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 6mm disks, thickness 0.009mm, 99.99+%