ADAPTIVE BIOCHEMICAL RESPONSES OF PUNICA GRANATUM TO ATMOSPHERIC FLUORIDE POLLUTION

作者：Elloumi Nada; Ben Amor Afef; Zouari Mohamed; Belhaj Dalel; Ben Abdallah Ferjani; Kallel Monem

来源：Fluoride, 2016, 49(3): 357-365.

• Airborne fluoride
• Biochemical responses
• Fluoride pollution
• Pomegranate
• Punica granatum

Monthly observations on the southwest side of a phosphate fertilizer plant located in the coastal zone of the Gabes region of Tunisia showed that pomegranate trees (Punica granatum) close to the factory accumulated large quantities of the fluoride ion (F) with variable specific symptoms of toxicity. We focused on the impact of F accumulation on the photosynthetic pigment content, cell membrane, and selected osmoprotectants (proline and soluble sugars). Samples were collected at various distances from the phosphate fertilizer factory: study sites at 0.5, 2.5, and 3.5 km and a control site at 35 km. The Punica granatum trees accumulated significant amounts of F in the leaves, showed a marked reduction in the photosynthetic pigment content, and had damage to the cell membranes, as indicated by an increased malondialdehyde (MDA) content. The significant increases in the proline and soluble sugars content in response to fluoride accumulation may be defense mechanisms induced in response to fluoride stress.

• 出版日期2016-9