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Qiyuan Pan and Bruno Quebedeaux

57 ORAL SESSION 17 (Abstr. 116-123) Tree Fruit and Berries: Gas Exchange/Photosynthesis

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Joshua Sherman, Richard J. Heerema, Dawn VanLeeuwen, and Rolston St. Hilaire

optimum level of Mn in the medium treatment there is higher electron transport rates, light reactions, and NADPH turnover for the dark reactions, therefore, increased assimilation of CO 2 . Fig. 2. Mean ( A ) leaflet photosynthesis, ( B ) intercellular CO

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Hui-lian Xu, Laurent Gauthier, and André Gosselin

125 POSTER SESSION 18 Nutrition & Photosynthesis/Vegetable Crops

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Shin Hiratsuka, Yuka Yokoyama, Hiroshi Nishimura, Takayuki Miyazaki, and Kazuyoshi Nada

photosynthesis by shading, weakening fruit sink strength resulting from lower light and increased temperature and moisture in the bag, or both. However, little supportive experimental evidence has been provided. Photosynthesis occurs in fruit of many crop plants

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Dominique-André Demers, Sylvain Dubé, Serge Yelle, and André Gosselin

85 ORAL SESSION 24 (Abstr. 191–198) Photosynthesis/Vegetables & Fruit

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Luca Corelli-Grappadelli and E. Magnanini

Based on a commercially available net photosynthesis (Pn) unit coupled to a custom-built chamber that does not require air conditioning, a low-cost system to measure whole-tree gas exchange in the field is described. The temperature in the chamber is influenced by air flow in relation to tree size. A flow of 20 liters·s-1 (equal to ≈1.5 chamber volume changes/min) was sufficient to maintain the leaves of an 11-year-old `Golden Delicious'/M.27 tree at a temperature similar to that of the ambient air and control CO2 gradients in the chamber. The system has been in operation on apple (Malus domestica Borkh.) trees for up to 4 months without modifying tree behavior.

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held at the 90th ASHS Annual Meeting Nashville, Tennessee 28 July 1993 sponsored by the Cropping Efficiency and Photosynthesis Working Group published by the American Society for Horticultural Science Alexandria, VA 22314-2824 as a special insert in

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J.D. Caldwell, J.F. Hancock, and J.A. Flore

179 ORAL SESSION (Abstr. 715-722) CROSS-COMMODITY PHOTOSYNTHESIS

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Hong-jia Xu, Masafumi Johkan, Toru Maruo, Natsuko Kagawa, and Satoru Tsukagoshi

supply of K and Na accumulation in low-K lettuce could affect plant growth, but the underlying physiological changes caused by this remain unknown. Photosynthesis and chlorophyll fluorescence are essential for plant growth and development, which partially

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James Bunce

photosynthesis, although reproductive processes can be more sensitive and specific targets of stress in some species. In many crops, dry conditions occur after full canopy development so that slowing of leaf area development would have little impact on biomass