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Ling Ma, Xingquan Rao, and Xiaoyang Chen

potential risk of flooding during the rainy season. In forest management, information regarding WT of plant species is necessary to cope with flooding. In addition, ecological restoration in depression areas or flooded watersheds must involve waterlogging

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Valtcho D. Zheljazkov and Tess Astatkie

Pb accumulation by plants. The usefulness of various plants for phytoextraction of Pb in mildly contaminated Nova Scotia soils is unknown. The objective of this study was to evaluate the phytoextraction potential of 10 plant species with or without

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Ka Yeon Jeong, Paul V. Nelson, Carl E. Niedziela Jr., and David A. Dickey

respiratory acidification ( Marschner, 1995 ); acidic, neutral, or alkaline biotic effect of nutrient uptake ( Pertusatti and Prado, 2007 ), which varies among plant species ( Fisher et al., 2014a ; Johnson et al., 2013 ); and the abiotic effect of fertilizer

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Eric R. Rozema, Robert J. Gordon, and Youbin Zheng

). This form of phytoremediation, known as phytodesalinization, could increase the Na + and Cl – -removing capacities of CWs. Certain plant species accumulate and store salt ions in their vacuoles to maintain a proper osmotic gradient and survive in

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Jennifer M. Bousselot, James E. Klett, and Ronda D. Koski

lightweight, well drained, and prone to extreme fluctuations in moisture content. As a result of the characteristics of the substrate, plant species used in extensive green roof systems, among other things, must be able to adapt to periods of low moisture

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Roger T. Koide, Lena L. Landherr, Ylva L. Besmer, Jamie M. Detweiler, and E. Jay Holcomb

We inoculated six common annual bedding plant species with the vesicular-arbuscular mycorrhizal fungus Glomus intraradices Schenck & Smith using two fertilizer P concentrations (3 or 15 μg·mL-1) and three inoculation timings (inoculation at sowing, at transplanting, or at both times). The plant species used were: Salvia splendens F. Sellow ex Roem. & Schult. cv. Firecracker Rose; Impatiens walleriana Hook. f. cv. Sun and Shade Royal Red; Tagetes patula L. cv. Girls Golden; Petunia ×hybrida Hort. Vilm.-Andr. cv. Freedom Blue; Coleus ×hybridus Voss. cv. Jazz Salmon; and Viola ×wittrockiana Gams. cv. Majestic Giant White. In general, Coleus, Petunia, and Viola were colonized more than were Impatiens, Tagetes, and Salvia. Inoculation at sowing required less inoculum than either of the other methods. Moreover, it was generally as effective in promoting colonization as double inoculation, and was often more effective than inoculation at transplanting. Mycorrhizal colonization was significantly reduced by the higher P concentration. The use of Myconate®, a water-soluble form of the flavonoid formononetin, significantly stimulated colonization in Salvia.

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Candice A. Shoemaker and William H. Carlson

Seeds of eight commonly grown bedding plant species [Ageratum houstonianum Mill., Begonia × semperflorens Hort., Impatiens wallerana Hook., Lobularia maritima (L.) Desv., Petunia × hybrida Hort., Pelargonium hortorum L.H. Bailey, Salvia splendens F. Sellow, Tagetes patula] were germinated at pH values from 4.5 to 7.5 at 0.5 increments. Seeds were germinated in petri dishes on filter paper saturated with buffer solutions or in petri dishes containing a 50 sphagnum peat: 50 coarse vermiculite (peatlite) medium moistened with buffer solutions. Germination on filter paper was affected by pH for all species tested. Peatlite medium pH affected germination of all species tested, except Salvia splendens. Species response to similar pH values differed between the two germination procedures. Total percent germination of seeds germinated was less in peatlite medium than on filter paper.

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Kathleen M. Kelley, Janine R. Stumpf, James C. Sellmer, and Ricky M. Bates

Consumers were surveyed at the 2004 Philadelphia Flower Show in Philadelphia, Pa. from 8–10 Mar., to quantify their attitudes and behaviors towards invasive plant species and the potential problems associated with purchasing and planting invasives in the landscape. A majority of the 341 participants (81.5%) was aware that non-native exotic plants were used in the landscape and that these plants may be invasive in natural areas. Less than half (40.1%) acknowledged owning plants that were considered invasive, while one-third (33.5%) did not know. Less than half (41.3%) believed that laws should be passed to prevent sale of non-native exotic plants, while 27.8% believed that laws should be passed to allow sale of only native plants in their area. Three distinct consumer segments were identified using cluster analysis: “Invasive savvy,” participants knowledgeable about invasives and interested in alternative species; “Invasive neutral,” participants neutral in their decision to purchasing alternatives to invasive plants and price sensitive in regard to paying more for plants tested for invasiveness; and “Invasive inactive,” participants opposed to purchasing genetically modified plants or those bred to be seedless. Survey results indicated that media sources (e.g., television and newspapers/magazines/books) would be effective for educating consumers about potential problems associated with invasive species in the landscape.

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Kwang Jin Kim, Myeong Il Jeong, Dong Woo Lee, Jeong Seob Song, Hyoung Deug Kim, Eun Ha Yoo, Sun Jin Jeong, Seung Won Han, Stanley J. Kays, Young-Wook Lim, and Ho-Hyun Kim

. Indoor plant species tested and their height, leaf area, and fresh weight. The plants were watered every 3 d with the excess water allowed to drain. All plants were watered the day before the gas treatments. One to four pots of each species were

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Johnny Carter and Edwin K. Mathews

Paclobutrazol and three commercial growth retardants (B-nine, Cycocel and A-rest) were compared for their effectiveness in controlling the growth of five bedding plant species ('Yellow Boy' marigold, `Blue Blazer' ageratum, `Dreamland Orange' zinnia, `Better Boy' tomato and `Black Beauty' eggplant). Results showed that growth suppression depended on the treatment and species tested. All of the growth retardants suppressed the growth of `Yellow Boy' marigold. Growth of `Blue Blazer' ageratum was suppressed by all the treatments except for Cycocel. With `Dreamland Orange' zinnia, B-nine and Cycocel suppressed growth while Paclobutrazol and A-rest did not have any effect. All of the treatments except A-rest suppressed the growth of `Better Boy' tomato and `Black Beauty' eggplant.