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The mitogen-activated protein kinase (MAPK)
cascade is the most important mechanism in environmental responses and
developmental processes in plants. The OsMAPK2 gene has been found to function in plant tolerance to
diverse biotic/abiotic stresses. This
paper presents evidence that OsMAPK2 (Oryza sativa MAP kinase gene 2) is responsive to Pi deficiency and involved in Pi homeostasis. We found that full-length expression of OsMAPK2 was up-regulated in both rice
plants and cell culture in the absence of inorganic phosphate (Pi).
The transgenic rice and Arabidopsis plants overexpressing OsMAPK2 showed affected root development
and increased plant Pi content compared with wild-type plants.
Overexpression of OsMAPK2
controlled the expression of several Pi starvation-responsive genes.
Our results indicated that OsMAPK2 enables tolerance phosphate deficiency and is involved in Pi homeostasis.
sensitive imprinted poly(N-isopropylacrylamide) nanocomposite gels were syntheses
via in-situ, free radical
crosslinking polymerization of corresponding monomer in nano-sized silica and
five different concentrations of myoglobin solution by using the molecular
imprinting method. Mb adsorption from five different concentrations of Mb
solutions was investigated by two types of nanocomposite gel systems prepared
by non-imprinted and imprinted methods. Nanocomposite gels imprinted with Mb
showed higher adsorption capacity and specificity for Mb than nanocomposite
gels prepared by the usual procedure. The highest Mb adsorption was observed via
the imprinted nanocomposite gels with 12.5% Mb. In addition, selectivity studies were also performed by using
two reference molecules as fibrinogen and hemoglobin. The imprinted
nanocomposite gels had higher adsorption capacity for Mb than the non-imprinted
gels and also exhibited good selectivity for Mb and high adsorption rate
depending on the number of Mb sized cavities.