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Jason D. Lattier, Hsuan Chen, and Ryan N. Contreras

labeling techniques, such as fluorescent in situ hybridization and genomic in situ hybridization, and has proven valuable for characterizing hybrids in woody plants with small chromosomes ( Van Laere et al., 2010 ). Current root tip cytology consists of

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M.E. El-Mahrouk, A.R. El-Shereif, Y.H. Dewir, Y.M. Hafez, Kh. A. Abdelaal, S. El-Hendawy, H. Migdadi, and R.S. Al-Obeed

material for the reversion experiments ( Fig. 1B ). Fig. 1. Reversion, rooting and acclimatization of hyperhydric banana ‘Grand Naine’ shoots. ( A ) Normal multiple shoots from the fourth subculture in Murashige and Skoog (MS) medium supplemented with 6

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Liang Zheng, Zibin Xiao, and Weitang Song

used for D. caryophyllus seedling production, which is economically important for high-scale breeding of elite commercial genotypes from stem cuttings of the mother plants ( Garrido et al., 1998 ). Adventitious rooting is an essential step in the

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Sudeep Vyapari, S.M. Scheiber, and E.L. Thralls

growth, and absence of discolored or damaged leaves ( Brand and Leonard, 2001 ). There is little evidence that indicates consumers pay attention to root ball condition at purchase, yet landscape establishment is affected by the condition of root systems

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JinSheng Huang and Paul V. Nelson

31 POSTER SESSION 5 (Abstr. 485-512) Floriculture: Aerial and Root Environments

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David I. Yates, Brandi L. Earp, Foster Levy, and Elaine S. Walker

To improve the success of vegetative propagation of Sciadopitys verticillata, stem cuttings were subjected to three treatments designed to minimize the accumulation of a latex-like sap at the cut ends of stems. A 24-hour soak in water before a hormone dip significantly enhanced rooting success and root mass. The water soak pretreatment was more beneficial to hardwood cuttings compared with softwood cuttings. Cuttings from shade-grown source trees showed the highest rooting success, but source tree age, height, and place of origin were not important factors. The water-insoluble latex-like sap had strong antibacterial activity against 3 of 11 bacterial species tested, but activity was not related to bacterial Gram reaction or the bacterial natural environment. In contrast, pine resins and latexes from selected angiosperms showed no antibacterial activity. The antibacterial component of the Sciadopitys latex-like sap was heat stable and therefore probably not protein based.

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Thomas R. Sinclair, Andrew Schreffler, Benjamin Wherley, and Michael D. Dukes

A key aspect in the establishment of turfgrass sod is rapid rooting or “knitting” of the sod into the underlying soil. Factors that ensure rapid sod rooting include 1) proper soil aeration; 2) adequate moisture in the underlying soil; and 3

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Jinhong Yuan, Man Xu, Wei Duan, Peige Fan, and Shaohua Li

the damage of photosynthetic apparatus, imposing a non-stomatal limitation to photosynthesis ( Ennahli and Earl, 2005 ; Farquhar and Sharkey, 1982 ). Partial root zone drying (PRD) is an irrigation strategy that applies water to only one part of the

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Matthew B. Bertucci, David H. Suchoff, Katherine M. Jennings, David W. Monks, Christopher C. Gunter, Jonathan R. Schultheis, and Frank J. Louws

). Research has focused on cucurbit rootstock root system physiology to help explain this improved tolerance; however, research has only been conducted with figleaf gourd ( Cucurbita ficifolia ) and is limited to suboptimal soil temperatures ( Lee et al., 2005

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Eric M. Lyons, Robert H. Snyder, and Jonathan P. Lynch

Healthy root systems are essential to maintain turfgrass quality in the demanding environment of golf greens. Increased rooting of creeping bentgrass on golf greens can increase drought tolerance ( DaCosta and Huang, 2006 ), nitrogen uptake