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- Title
Nickel-hyperaccumulating species of Phyllanthus (Phyllanthaceae) from the Philippines.
- Authors
Quimado, Marilyn O.; Fernando, Edwino S.; Trinidad, Lorele C.; Doronila, Augustine
- Abstract
Botanical exploration on ultramafic sites in Palawan, Surigao and Zambales has resulted in the discovery of a new hypernickelophore species (nickel (Ni) concentration >1%) of Phyllanthus (Phyllanthaceae). This paper reports in detail the Ni uptake of populations of P. erythrotrichus in Candelaria, Masinloc and Santa Cruz, Zambales, and confirms the status of P. securinegoides in Taganito, Surigao del Norte, which had been analysed only through herbarium specimens, and these were compared with a known hypernickelophore, P. balgooyi, which was collected in Narra and Puerto Princesa, Palawan. Nickel content of the dried leaves, stems and root tissues was quantified using atomic absorption spectrophotometer. P. erythrotrichus and P. securinegoides both had more than 10 000 µg g-1 Ni in the leaves, whereas the roots had 1195 µg g-1 and 4636 µg g-1. P. balgooyi accumulated 6319 µg g[sup -1] of Ni in the leaves, whereas the roots had a higher Ni concentration of up to 8116 µg g-1, respectively. All three species had values of translocation factor and enrichment factor of >1.0, implying that all species have great potential in phytoremediation, specifically, phytoextraction of Ni. These three species of Phyllanthus are prominent in ultramafic scrub communities and, hence, should be used in ecological restoration of mined-out Ni lateritic areas. The implications of the unique adaptation of these species are also discussed in relation to a conservation strategy for their natural populations. The genus Phyllanthus has at least 42 species from various parts of the world reported to accumulate more than 0.1% nickel in their leaves. This paper compared nickel accumulation in seven species of Phyllanthus from the Philippines and reports Phyllanthus erythrotrichus as a hypernickelophore, accumulating more than 1% nickel in the leaves. Three of the species examined have potential in nickel farming.
- Publication
Australian Journal of Botany, 2015, Vol 63, Issue 1/2, p103
- ISSN
0067-1924
- Publication type
Article
- DOI
10.1071/BT14284