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. Photobiol. B 110 1 8 doi: 10.1016/j.jphotobiol.2012.02.002 10.1016/j.jphotobiol.2012.02.002 Wang, Y.H. Garvin, D.F. Kochian, L.V. 2002 Rapid induction of regulatory and transporter genes in response to phosphorus, potassium, and iron

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al., 2003 ). Thus, growing lettuce under adverse environmental conditions can have an unfavorable effect on growth, yield, and quality. Potassium is vital to plant growth, yield, and quality even though it is not a constituent of any functional

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species examined by Frantz et al. (2008) , all 14 accumulated additional amounts of Si in their leaves when supplemented with potassium silicate. Leaf tissue concentration varied from 237 mg·kg −1 Si for petunia ( Petunia × hybrida Vilm. ‘White madness

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al. (2008) observed 193 mg·kg −1 Si in petunia ‘White Madness’ grown hydroponically in a nutrient solution amended with 2 m m potassium silicate. Mattson and Leatherwood (2010) observed 506 mg·kg −1 Si in petunia ‘Cascadias Cherry Spark’ grown

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+ transporters ( Deinlein et al., 2014 ). The first K + transporter found in plants was KAT1 and AKT1 in A. thaliana ( Lagarde et al., 1996 ; Sutter et al., 2006 ). In this study, the expression pattern and bioinformatics analysis of a potassium channel gene

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needs. When tomato ( Solanum lycopersicum ) seedlings were exposed to phosphorus-, potassium-, or iron-deficient conditions, differential expression of specific regulatory and transporter genes could be detected within 1 h using a microarray ( Wang et al

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al., 2006 ) indicates that pecan may be a ureide transporter and hints that ureide-transporting species may be more prone to Ni deficiency than are amine- or amide-transporting species. Thus the potential for disruption of normal N metabolism by poor

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., in press). Potassium is an essential macronutrient for plant growth ( Pettigrew, 2008 ; Schachtman and Liu, 1999 ). K deficiency affects ion homeostasis, osmotic regulation, enzyme activity, membrane polarization, and various metabolic processes

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plants tend to uptake Si passively, and Si-accumulating species, such as grasses, do it actively ( Barber and Shone, 1966 ; Casey et al., 2003 ; Epstein, 1999 ). In the latter, different Si transporters involved in root uptake, translocation, and

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-0301(99)00011-8 Osakabe, Y. Arinaga, N. Umezawa, T. Katsura, S. Nagamachi, K. Tanaka, H. Ohiraki, H. Yamada, K. Seo, S.U. Abo, M. Yoshimura, E. Shinozaki, K. 2013 Osmotic stress responses and plant growth controlled by potassium transporters in Arabidopsis Plant Cell 25

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