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Lisa E. Richardson-Calfee, J. Roger Harris, and Jody K. Fanelli

Growth periodicity is generally conceived as a set pattern of growth incited by internal factors and influenced by environmental conditions ( Morrow, 1950 ). The inherent alternation between periods of abundant root and shoot growth and little or

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Frederic B. Ouedraogo, B. Wade Brorsen, Jon T. Biermacher, and Charles T. Rohla

newly established pecan trees increases trunk diameter, 2) pruning of newly established single-trunk tree scions will lead to fewer, but longer shoots, and 3) pruning will lead to higher total shoot growth. The findings generally support the second

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Haijun Zhu and Eric T. Stafne

, 1970 ). It is also the most common characteristic observed by growers, who associate it with tree vigor and nutrition. There can be a large variation in shoot growth on the same tree or different trees. Old trees tend to produce short shoots while young

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Job Teixeira de Oliveira, Rubens Alves de Oliveira, Domingos Sarvio Magalhães Valente, Isabela da Silva Ribeiro, and Paulo Eduardo Teodoro

(SVM), plant water potential (WPB, WPA) and lateral shoot growth (LSG). A significant positive correlation between GY and LSG was found ( r = 0.126). It is worth noting the significant positive correlations between RP (RP1, RP2, RP3, RP4, and MRP

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Stephen S. Miller

tree is a moderately vigorous to vigorous cultivar. The growth suppressant prohexadione–calcium (PCa) (Apogee; BASF Corp., Agricultural Products Group, Research Triangle Park, NC) has demonstrated excellent shoot growth control in a number of apple

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Jonathan P. Lynch

to root growth and maintenance, which diverts resources from shoot growth and reproduction. In perennial plants, reproduction may be foregone entirely in a stressful season. Increased risk . Expression of a trait may generate risks of abiotic

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

-to-shoot ratio is also modified by natural growth patterns. Many woody species, such as Ligustrum japonicum Thunb., exhibit an episodic growth habit, fluctuating between periods of rapid shoot growth and slow root growth and periods with the inverse pattern

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Todd C. Einhorn, Mateus S. Pasa, and Janet Turner

for apple. In 2010 and 2011, shoot length was recorded weekly at both sites on ten 1-year-old shoots selected at a similar canopy height and position and tagged at the time of the first application. Shoot length was measured until shoot growth ceased

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Thomas W. Zimmerman and Ralph Scorza

This study examined stage I peach shoot growth under various photoperiods in combination with different vessel closures and compared the influence of BA and Thidiazuron (TDZ) on peach shoot growth during stage II. The basal salts were as described by Almehdi and Parfitt (1986) with 1.0 μM BA, 0.02 μM IBA, 2% sucrose, 0.1% gelrite and 0.4% agar. Shoot growth of peach clone B612615, as determined by leaf number after one month, was similar in vessels capped with Kim-Kaps, Kaputs or PM caps. Plastic foam Identi-Plugs resulted in desiccation of the medium and stressed shoots with reduced growth. A 4 h light/2 h dark photoperiod four times a day provided better growth during stage I than a 16 h light/ 8 h dark photoperiod. For stage II, established shoots of Suncrest, Georgia Bell and Evergreen were grown on MS medium supplemented with 0.02 μM IBA in combination with 1.0 or 10 μM BA or 0.1, 1.0 or 10 μM TDZ. TDZ produced excessive callus resulting in minimal shoot proliferation. Shoot proliferation from axillary buds was greatest with 10 μM BA.

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Jeff S. Kuehny and Mary C. Halbrooks

Episodic growth is a term used to define alternate episodes of root and shoot growth. Fresh weight gain of Ligustrum japonicum roots and shoots was continuous through each episode of shoot elongation. Root:shoot ratio, however varied over time and oscillated with each episode of shoot elongation. During shoot elongation the percent fresh weight (of whole plant weight) allocated to the shoot decreased while the percent allocated to roots increased. During cessation of shoot elongation the percent fresh weight allocated to the shoot increased; while percent allocated to roots decreased. Formation of lateral roots was synchronous with shoot elongation.