Gypsophila sphaerocephala Fenzl ex Tchihat.: A Boron Hyperaccumulator Plant Species That May Phytoremediate Soils with Toxic B Levels

Authors : Mehmet BABAOĞLU

Pages : 273-278

View : 16 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Analyses were carried out to identify boron insert ignore into journalissuearticles values(B); hyperaccumulating plant species in an actively B- mined area of Kırka, Eskişehir, Turkey. Only 4 plant species, Gypsophila sphaerocephala Fenzl ex Tchihat. var. sphaerocephala insert ignore into journalissuearticles values(Caryophyllaceae);, Gypsophila perfoliata L. insert ignore into journalissuearticles values(Caryophyllaceae);, Puccinellia distans insert ignore into journalissuearticles values(Jacq.); Parl. subsp. distans insert ignore into journalissuearticles values(Gramineae); and Elymus elongatus insert ignore into journalissuearticles values(Host); Runemark subsp. turcicus insert ignore into journalissuearticles values(McGuire); Melderis insert ignore into journalissuearticles values(Gramineae);, were identified in the highest B- containing sections of the mine. The species were found growing successfully under high total insert ignore into journalissuearticles values(8900 mg kg-1); and available insert ignore into journalissuearticles values(277 mg kg-1); soil B concentrations. Among these plant species, G. sphaerocephala contained considerably higher B concentrations in its above-ground parts insert ignore into journalissuearticles values(2093 ± 199 SD mg kg-1, seeds; 3345 ± 341 SD mg kg-1, leaves);, compared to the roots insert ignore into journalissuearticles values(51 ± 11SD mg kg-1); and organs of the other species as revealed by analyses using an ICP-AES insert ignore into journalissuearticles values(Varian, Vista model); instrument. This species was followed by G. perfoliata with respect to B concentrations in its various organs. This study shows that G. sphaerocephala was not only able to grow on heavily B-contaminated soils, but was also able to accumulate extraordinarily high concentrations of B. This provides a new plant genotype to explore the mechanisminsert ignore into journalissuearticles values(s); of B hyperaccumulation which may lead to identifying the geneinsert ignore into journalissuearticles values(s); conferring B-resistance and to phytomining of contaminated soils, especially where B-toxicity symptoms occur. To our knowledge, there are no reports available on the hyperaccumulation of B, although many reports are available on the phytoremediation of metalliferous soils that contain excess amounts of Zn, Mn, Cu, Co, Pb, Al and Ni.
Keywords : Boron mine, Elymus, ICP AES, phytoremediation, Puccinellia, tolerance