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Jingwei Dai and Robert E. Paull

The growth and development of Anthurium andraeanum Andre cv. Kaumana flower before and after emergence from the subtending leaf base was studied. Eighty days before emergence, the anthurium flower was =0.3 cm long, enclosed by two tightly rolled stipules at the base of the subtending leaf petiole. During the rapid elongation stage of the leaf petiole, the flower (0.8 to 1.0 cm long) entered a period of slow growth 40 to 60 days before flower emergence. After the subtending leaf blade unfurled and had a positive photosynthetic rate, flower growth resumed. Spathe color development started =28 days before emergence when the flower was =50% of the emergence flower length (4.5 cm). At flower emergence, the spathe, excluding the lobes, was =75% red. The lobes did not develop full redness until 7 to 10 days after emergence. Peduncle growth was sigmoidal with the maximum growth rate 21 days after emergence. Spathe growth is characterized by a double sigmoid curve. The young, growing, subtending leaf blade had a negative net photosynthetic rate. Removal of this leaf blade advanced flower emergence by 18 days. The soft green leaf (25 to 30 days after leaf emergence) had a slightly positive measured net photosynthetic rate, and the removal of this leaf resulted in flower emergence 11 days earlier. A mature subtending leaf had the highest measured net photosynthetic rate, and its removal had little effect on flower emergence. The subtending leaf acted as a source of nutrients required for the developing flower. Altering the source-sink relationship by leaf removal accelerated flower emergence, probably by reducing the slow growth phase of the flower.

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Rui Wang, Yuqing Gui, Tiejun Zhao, Masahisa Ishii, Masatake Eguchi, Hui Xu, Tianlai Li, and Yasunaga Iwasaki

; Villalobos and Ritchie, 1992 ). Under heat stress, the whole-plant carbohydrate partitioning of rice at anthesis was changed, and the sugars acted as a signal molecule to mediate the source–sink relationship ( Zhang et al., 2018 ). Under suboptimal light

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Horacio E. Alvarado-Raya, Rebecca L. Darnell, and Jeffrey G. Williamson

al., 2006 ) may be the result of an overall decrease in root carbohydrate reserves in the annual system, and not differences in source–sink relationships between the two production systems. Further work on the effects of root pruning on raspberry

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Yongqiang Qian, Deying Li, Lei Han, and Zhenyuan Sun

defined as a process of redistribution of assimilated resources among the interconnected ramets according to source-sink relationships ( Forde, 1966 ; Kaitaniemi and Honkanen, 1996 ; Marshall, 1990 ). Physiological integration is an important means by

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Marlene Ayala and Gregory Lang

( Tables 4 and 5 ). Conversely, Kappel (1991) reported that, with ‘Lambert’ sweet cherry on vigorous P. avium seedling rootstocks, ES growth had a greater sink strength for photosynthates than fruit. Source–sink relationships and relative C

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Jieshan Cheng, Peige Fan, Zhenchang Liang, Yanqiu Wang, Ning Niu, Weidong Li, and Shaohua Li

Crop yield and fruit quality in fruit trees are highly dependent on efficient capture of solar energy and subsequent allocation of photoassimilate. Source-sink relationships are important factors influencing these allocation patterns. Fruit

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Rebecca L. Darnell, Horacio E. Alvarado-Raya, and Jeffrey G. Williamson

HortTechnology 16 1 6 Fernandez, G.E. Pritts, M.P. 1993 Growth and source-sink relationships in ‘Titan’ red raspberry Acta Hort. 352 151 157 Fernandez, G.E. Pritts, M.P. 1994 Growth

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Shawna L. Daley, William Patrick Wechter, and Richard L. Hassell

Blake (1994) attribute the loss of total nonstructural carbohydrates to the loss of leaves, the source of carbon and growth hormones in the plants’ source–sink relationship. In a similar way, watermelon rootstock seedlings may be dependent on the

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Ben Hong Wu, Hai Qiang Huang, Pei Ge Fan, Shao Hua Li, and Guo Jie Liu

water reservoir ( Huguet et al., 1992 ). Outflow of water from fruit during the day, as shown by fruit shrinkage, may influence the water status of adjacent leaves. Removing or retaining fruit has often been used in studies of source–sink relationships

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Lili Zhou, Maria Eloisa Q. Reyes, and Robert E. Paull

have been hampered by the absence of a nondestructive measure of the leaf area and information regarding the impact of leaf area loss on the photosynthesis rate and source-sink relationships. The large size of the leaves in this monopodial plant and the