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Kyong Ju Choi, Gap Chae Chung and Sung Ju Ahn

Cucumber (Cucumis sativus L.) seedlings were grafted onto cucumber-(CG) or figleaf gourd (FG, Cucurbita ficifolia Bouche) seedlings in order to determine the effect of solution temperature 12, 22, and 32C) on the mineral composition of xylem sap and plasma membrane K+–Mg++–ATPase activities of the roots. Low solution temperature (12C) lowered the concentration \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{NO}_{3}^{-}\) \end{document} and \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{H}_{2}\mathrm{PO}_{4}^{-}\) \end{document} in xylem sap of CG plants, but not of FG plants. Concentrations of K+, Ca++, and Mg++ in xylem sap were less affected than anions by solution temperature. The plasma membrane of FG plants grown in 12C solution temperature showed the highest K+–Mg++–ATPase activity at all ATP concentrations up to 3 mM and at low reaction temperature up to 12C, indicating resistance of figleaf gourd to low root temperature.

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Janine G. Haynes, John M. Smagula and Paul E. Cappiello

Stem cuttings were harvested in April from four clones of containerized bunchberry(Cornus canadensis L.) forced in the greenhouse and in June from the same four clones growing in the field. April cuttings that had produced rhizomes by transplant time produced the greatest mean number and weight of shoots during the first growing season compared to April cuttings without rhizomes, June cuttings with rhizomes, or June cuttings without rhizomes. In a second study, cuttings and single-stem divisions were taken in July; divisions produced a greater mean number of shoots than did stem cuttings when compared at the end of Oct. A third study evaluated the effect of K-IBA application to lateral buds on subsequent rhizome production, and the effect of cutting node number (two vs. three nodes) on root or rhizome development. Treating lateral buds with K-IBA was not inhibitory to rhizome formation and elongation. Compared to two-node cuttings, three-node cuttings produced greater mean rootball size, rhizome number, and rhizome length; nearly twice as many of the three-node cuttings formed rhizomes as did two-node cuttings. A fourth study showed that cuttings rooted for 5 or 6 weeks in a mist enclosure generally exhibited greater shoot and rhizome production by the end of the first growing season than cuttings rooted for 8 or 9 weeks. This was despite the finding that cuttings rooted for longer durations (8 or 9 weeks) possessed larger rootballs and greater rhizome numbers at transplant time compared to cuttings rooted for shorter durations (5 to 6 weeks). Chemical name used: indole-3-butyric acid (K-IBA).

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Timothy K. Broschat

-containing fertilizers would result in superior growth or visual quality. Gilman et al. (2000) reported no response to applied phosphorus (P) or K in live oak, but this species rarely exhibits deficiencies of any nutrient element in the landscape. Broschat et al

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Timothy K. Broschat

United States [N, K, magnesium (Mg), iron (Fe), manganese (Mn), and boron (B)], and a deficiency of any one of these elements will affect palm aesthetic quality and health ( Broschat, 2009 ). Broschat (1999) determined that fertilizers having a N:K 2 O

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S.M. Southwick, W. Olson, J. Yeager and K.G. Weis

This work was supported in part by a grant from the California Prune Board. We acknowledge the critical reviews of R. Carlson and K. Uriu. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal

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Timothy K. Broschat

if routine application of magnesium (Mg) or micronutrient-containing fertilizers would result in superior growth or visual quality. Gilman et al. (2000) found no response to applied phosphorus (P) or potassium (K) in live oak, but this species

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Chandrappa Gangaiah, Amjad Ahmad, Hue V. Nguyen, Koon-Hui Wang and Theodore J.K. Radovich

tomato plants ( Whaphamem et al., 1993 ). In Hawaii, the most commonly found macrosized invasive species are G. salicornia (Gorilla Ogo), K. alvarezii ( Kappaphycus ), and E. denticulatum ( Eucheuma ); all are dominant alien algal species in

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H.T. Kraus, S.L. Warren, G.J. Bjorkquist, A.W. Lowder, C.M. Tchir and K.N. Walton

. Mineral nutrient recommendations for woody, perennial plant production include daily applications of 50 to 100 mg·L −1 N, 10 to 20 mg·L −1 P, and 25 to 50 mg·L −1 K in a 5:1:3 N:P:K ratio ( Wright and Niemiera, 1987 ). Schnelle and White (2004

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T.K. Broschat, D.R. Sandrock, M.L. Elliott and E.F. Gilman

nutritional deficiencies in most plants merely reduce growth rate, yield, or visual quality, deficiencies of K, manganese (Mn), and boron (B) can be fatal in palms ( Elliott et al., 2004 ), which are monocots possessing a single shoot meristem ( Tomlinson

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Wayne A. Mackay

Mature flowering Arbutus texana trees were successfully micropropagated from shoot tips. Optimum shoot proliferation was achieved on a basal medium consisting of WPM salts, MS vitamins, and sucrose supplemented with 11.1 or 22.2 μm BA and no auxin. Microcuttings rooted readily when pulsed with 6.1 μm IBA for 1 week and transferred to auxin-free medium. The addition of charcoal to the rooting medium improved root branching and elongation but suppressed root formation. Chemical names used: N-(phenylmethyl)-1H-purin-6-amine (BA); indole-3-butyric acid (IBA).