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Haiyan Zhang

with greater RSR (small seeds = 61.65% ± 4.22%, large seeds = 58.72% ± 3.84%; F = 14.44, P = 0.00157) than those germinating from large seeds. Fig. 1. Shoot biomass (SB) ( A ); root biomass (RB) ( B ); taproot length (TL) ( C ); and the percentage of

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Christopher J. Currey and Roberto G. Lopez

DLI in greenhouses by up to 60% ( Hanan, 1998 ), thereby minimizing the potential for photosynthesis by cuttings in propagation. Studies have reported an increase in root and shoot biomass and a reduction in flowering time after transplant in response

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Sandra R. Menasha* and Milton E. Tignor

Sweet corn (Zea mays L.) is difficult to transplant due to poor root regeneration. Despite reduced yields, growers are transplanting sweet corn to hasten maturity time to target profitable early markets in the Northeast. Researchers have ascribed the negative impacts on yield to restricted rooting volume. Therefore, the impacts plug cell volume had on sweet corn transplant root architecture and biomass accumulation were investigated. `Temptation' sweet corn was sown in volumes of 15, 19, 14, and 29 mL correlating to transplant plug trays with plug counts of 200, 162, 128, and 72 plugs per tray. Plug cells were exposed to three substrate environments; a dairy manure based organic compost media, a commercial soil-less germination mix, and the soil-less media supplemented 2X with 200 ppm soluble 3-3-3 organic fertilizer. A 4 × 3 factorial randomized complete-block experimental design with two blocks and five replicates per treatment was repeated twice in the greenhouse. For each experiment a total of three center cells were harvested from each replicate for analysis using the WinRhizo Pro root scanning system (Regent Instruments Inc., Montreal). Three cells per treatment were also transplanted into 8-inch pots to stimulate field transplanting. Based on mean separation tests (n = 30), increased cell volume before transplanting significantly increased root surface area, average diameter, and root volume after transplanting (n = 18). Mean root surface area for a 29-mL cell was 30% greater than a 15-mL cell before transplanting and 22% greater after transplanting. Plug cell volume also significantly impacted shoot and root biomass (P <0.0001). A 14-mL increase in cell volume resulted in a root and shoot dry weight increase of about 15%.

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Dilma Daniela Silva, Michael E. Kane, and Richard C. Beeson Jr.

similar leaf area-to-root mass ratios for both treatments ( Table 3 ). Similar ratios indicate that LC plants had established a balance between transpiring area and absorbing mass. Root contributions to total biomass were generally ≈42% and varied

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Gladis M. Zinati, John Dighton, and Arend-Jan Both

growth, nutrient uptake, and root colonization. In micropropagation systems, Jansa and Vosátka (2000) showed that ericoid mycorrhiza fungal strains were found beneficial for the growth of micropropagated rhododendron ( Rhododendron L.) ‘Belle

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John R. Yeo, Jerry E. Weiland, Dan M. Sullivan, and David R. Bryla

. The plants from both experiments were washed and divided into shoots (stems and leaves) and roots, oven-dried at 70 °C, and weighed to determine the total dry biomass. Susceptibility to phytophthora root rot was expressed as the relative difference in

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

were 1) to evaluate the effect of root ball conditions at transplanting on canopy growth and biomass production and 2) to determine if root ball slicing is beneficial during landscape establishment of plumbago. Materials and methods Root-bound and

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Claudia Fassio, Ricardo Cautin, Alonso Pérez-Donoso, Claudia Bonomelli, and Mónica Castro

goal of this research was to quantify the effects of this unique clonal propagation technique and grafting on avocado root architecture and biomass allocation. Material and methods Site and plant material. The study site was located at the experimental

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Junhuo Cai, Junjun Fan, Xuying Wei, and Lu Zhang

( Ren et al., 2009 ). Therefore, plants with different types of life cycles usually display distinct biomass distribution patterns across various organs ( Tao and Zhang, 2014 ). In particular, most perennial herbaceous plants typically have large root

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Amy L. Shober, Kimberly A. Moore, Christine Wiese, S. Michele Scheiber, Edward F. Gilman, Maria Paz, Meghan M. Brennan, and Sudeep Vyapari

harvested × 8 (Zones 8b and 10b) or root mass (g) = dry root mass harvested × 4 (Zone 9a). The root to shoot biomass ratio was then calculated as: root:shoot biomass ratio (unitless) = root mass (g)/shoot mass (g). Data analysis. The experiment was designed