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EFFECT OF NEODYMIUM
ION ON MITOCHONDRIAL METABOLISM OF RICE (ORYZA
SATIVA)
QIMING MEI1, 2,
RONG XIE3, XICHANG ZHOU2, CHENGYUAN LIU3,
YINGGUO ZHU1,
Abstract:
Mitochondria
were isolated from the F1 Hybrid Rice-Shanyou 63 and the
metabolic and thermogenic effect of Nd(
III)
(0, 8, 15, 20, 40, 60ug·L-1) was determined by the use of
ampoule method at 30oC. The thermogenic curves were used to
calculate the rate constant (K1), the maximum heat
production (Pm) and the total heat production (Q)
of mitochondria during activity recovery phase after treatment with Nd(
III).
The result shows that low concentration Nd(
III)
stimulated metabolism in the mitochondria which was suppressed by high
Nd (
III)
concentration treatments. The observed concentration-dependent effect of
Nd (
III)
on mitochondrial metabolism is similar to plant growth response to rare
earth elements. Based on these results, Nd (
III)
could have primarily interfered in mitochondrial metabolism which would
subsequently affect plant growth.
1The
College of Life Sciences of Wuhan University, Wuhan 430072, P. R. China
2The
Centre of Gardens of Wuhan University, Wuhan 430072, P. R. China
3Sichuan
Academy of Agricultural Sciences, Luzhou 646000, P. R. China
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