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Mara Grossman, John Freeborn, Holly Scoggins, and Joyce Latimer

plant production cycle. Some commercial producers of liners have reported reduced root mass in plants treated with BA (personal communication). BA has been shown to reduce root growth in in vitro Arabidopsis seedlings ( Auer, 1996 ). Sedum leaf

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Gabriele Amoroso, Piero Frangi, Riccardo Piatti, Francesco Ferrini, Alessio Fini, and Marco Faoro

et al., 2003 ; Ruter, 1994 ) because lateral roots cannot extend horizontally and therefore they either circle within the container or grow vertically to the bottom ( Lindström and Rüne, 1999 ). The impact of an unevenly spread and undistributed root

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R. C. Sloan Jr., P. G. Thompson, W. B. Burdine Jr., J. L. Main, and P. D. Gerard

`Beauregard' storage roots which were discarded from the Mississippi sweetpotato foundation seed program because of the presence of flesh mutations were bedded in Spring 1991. After the plants were pulled from the roots, the roots were further examined, and the flesh mutations were characterized by size and frequency. The progency from the original roots were examined for flesh mutations for three generations in 1991, 1992, and 1993. The degree of mutation in the original root did not influence the degree of mutation in succeeding generations of storage roots. In 1992 and 1993, the degree of mutation in the third and fourth generation roots did not differ from that of storage roots grown from plants from the foundation seed plant beds.

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Jenny B. Ryals, Patricia R. Knight, and Eric T. Stafne

was to evaluate the effect of auxin sources on rooting for seven species of passion fruit. Materials and methods The seven passion fruit species chosen were banana passion fruit, blue passionflower, two maypops (one from Mississippi and one from

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Georgia Vlachou, Maria Papafotiou, and Konstantinos F. Bertsouklis

of storage and temperature on C. nepeta seed germination ability, and 2) the effect of various plant growth regulators and agar concentrations on in vitro shoot proliferation, elimination of hyperhydricity problems, and microshoot rooting. Materials

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Thomas W. Zimmerman, Fred T. Davies Jr., and Jayne M. Zajicek

Dyssodia pentacheta, a prostrate-growing perennial Texas wildflower with potential for use in low-maintenance landscapes, was propagated in vitro and by stem cuttings under mist. Optimum rooting for IBA-treated semihardwood terminal stem cuttings (3 to 30 mm IBA) and in vitro-grown nodal segments (30 to 100 mm IBA) occurred after 4 weeks under an intermittent mist system. A 300-mm IBA basal dip was lethal to macroand microcuttings. In vitro, D. pentacheta produced more shoots per nodal explant on Woody Plant Medium (2 g Gelrite/liter) with 1 to 10 μ m BA than with combinations of BA and 0.5 μm NAA. After shoot proliferation, the shoots were subculture twice and grown on growth regulator-free medium. When maintaining D. pentacheta in vitro on media devoid of plant growth regulators, 1% sucrose was more effective than 2% for promoting shoot growth and suppressing apparent production of phenolics. Chemical names used: N-(phenylmethyl) -1H-purin-6-amine (BA); 1H-indole-3-butyric acid (IBA); 1-naphthaleneacetic acid (NAA).

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Simone da Costa Mello, Jéssika Angelotti-Mendonça, Lucas Baiochi Riboldi, Luigi Tancredi Campo Dall’Orto, and Eduardo Suguino

of plants that are propagated by cuttings, because sexual propagation cannot guarantee high yield and quality. However, tea plants are considered a difficult-to-root species ( Wei et al., 2013 ). The difficulty of rooting can be caused by external

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H.M. Mathers, S.B. Lowe, C. Scagel, D.K. Struve, and L.T. Case

finished potted plant appeals to consumers. Plants grown in containers are easier to handle and transport and are less prone to injury compared with balled and burlapped root balls. Growing plants in containers expands the window of marketability of the

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ZhaoSen Xie, Charles F. Forney, WenPing Xu, and ShiPing Wang

Root restriction is a powerful approach to improve the efficiency of agricultural resource use and to control the size of the shoot and partitioning of assimilates between vegetative and reproductive organs ( Carmi, 1986 ). In recent years, root

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Qin Shi, Yunlong Yin, Zhiquan Wang, Wencai Fan, Jinbo Guo, and Jianfeng Hua

drives water absorption through the root system, and root characteristics eventually determine plant access to water. Lateral roots are considered the main entrance point for water absorption, which might be greatly influenced by the traits of lateral