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Irfan Ali Sabir, Xunju Liu, Songtao Jiu, Matthew Whiting, and Caixi Zhang

, including inadequate insect pollination, low pollen germination, low viable pollen, low pollen tube growth, rapid ovule senescence, lack of bloom overlap with pollenizers, or insufficient pollenizer density. Planting several pollenizer genotypes and raising

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Chun-Qing Sun, Zhi-Hu Ma, Guo-Sheng Sun, Zhong-Liang Dai, Nian-jun Teng, and Yue-Ping Pan

in BF and BH, respectively ( Table 3 ). In the two crosses involving ‘Bai Lu’, the accumulation of callose between the stigma and the surface of pollen grains and the inhibition of pollen tube growth was commonly observed ( Fig. 5C–D ). Table 3

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Patrick J. Conner

tube growth ( Holdaway-Clarke et al., 1997 ). The addition of boron and calcium to the germination media increases germination percentage and length of pollen tube growth in many fruit species ( Galleta, 1983 ; Kwack, 1965 ). Optimal concentrations of

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James R. Schupp, H. Edwin Winzeler, and Melanie A. Schupp

chemical blossom thinners using ‘Golden Delicious’ and ‘Gala’ pollen tube growth models as timing aids HortScience 53 1143 1151 Oberhoffer, H. 1990 Pruning the slender spindle. Province British Columbia, Ministry of Agriculture Fisheries, Victoria, BC

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Dario J. Chavez and Paul M. Lyrene

pollen tube growth, or collapse of ovules after fertilization could be factors that produced these results ( Morrow, 1943 ). Meader and Darrow (1944) studied the crossing behavior of several hexaploid rabbiteye ( V. virgatum Aiton) varieties. Fruit set

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Shirley Miller, Peter Alspach, Jessica Scalzo, and John Meekings

). Pollen viability in blueberry is normally over 90% and was not checked on this occasion. Pollen on the stigmas and pollen tube growth through the styles to the ovaries was assessed using the method developed for kiwifruit ( Actinidia chinensis Planch

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Chyun-Chien Liang, Tzu-Yao Wei, and Der-Ming Yeh

replicates, was counted. In vivo pollen tube growth was observed following the methods described by Kho and Baër (1965) at 5 d after pollination in ‘Skotak’s Orange Crush’ × ‘Gespacho’ and at 1 d after pollination in ‘Gespacho’ × ‘Deroose’s Medusa’. Samples

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Rayane Barcelos Bisi, Rafael Pio, Daniela da Hora Farias, Guilherme Locatelli, Caio Morais de Alcântara Barbosa, and Welison Andrade Pereira

-alleles in each cultivar prevents pollen tube growth and effective fruiting, justifying the occurrence of cultivars with different self-incompatibility levels ( Hiratsuka and Zhang, 2002 ; Zhang and Hiratsuka, 1999 ). In addition, high (20 to 25 °C) or low

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Raymond J. Schnell, Cecile L. Tondo, J. Steven Brown, David N. Kuhn, Tomás Ayala-Silva, James W. Borrone, and Thomas L. Davenport

of self- versus nonself-pollen with the nonself-pollen tubes growing faster ( Sedgley, 1979 ). ‘Bacon’ pollen tube growth may be faster than that of ‘Hass’, thus favoring outcrossing in ‘Hass’ and selfing in ‘Bacon’. It is interesting to note that for

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Karim Keshavarz, Kourosh Vahdati, Mahmoud Samar, Behzad Azadegan, and Patrick H. Brown

important role in pollen germination and pollen tube growth ( Storey, 2007 ) and foliar sprays of B increase pollen germination in a number of tree species including almond [ Prumus amygdalus ( Nyomora et al., 1997 )], pear [ Pyrus communis ( Lee et al