TY - CONF TI - Effect of sink availability and high and low CO2 concentration on photosynthesis and dry matter production AU - Peet, M.M. AU - Clough, J.M. T2 - Ecological Society of America C2 - 1980/// CY - Tucson, AZ DA - 1980/// PY - 1980/8// ER - TY - CONF TI - Effects of CO2 concentration and level of sink demand on gas exchange and growth of soybean AU - Peet, M.M. AU - Clough, J.M. T2 - American Society for Horticultural Science C2 - 1980/// CY - Ft. Collins, CO DA - 1980/// PY - 1980/7// ER - TY - CONF TI - Effects of high atmospheric CO2 and sink demand on photosynthetic rates AU - Clough, J.M. AU - Peet, M.M. AU - Strain, B.R. T2 - Botanical Society C2 - 1980/// CY - Vancouver, BC DA - 1980/// PY - 1980/7// ER - TY - JOUR TI - Low temperature acclimation of root fatty acid composition, leaf water potential, gas exchange and growth of soybean seedlings. AU - Markhart III, Albert H. AU - Peet, Mary M. AU - Sionit, Nasser AU - Kramer, Paul J. T2 - Plant, Cell and Environment AB - Abstract Root fatty acid composition, photosynthesis, leaf water potentials, stomatal resistances, leaf specific weights, and root: shoot ratios of soybean were measured in two temperature regimes. Groups of soybean plants were grown in controlled chambers of the Duke University Phytotron under two thermoperiods. One group of the plants was grown from seed for 3 weeks in either 29/23°C or 17/11°C thermoperiods, and another group was grown for 2 weeks in 29/23°C and then transferred to the 17/11°C thermoperiod where it remained for 8 days. Broccoli was also grown in either 29/23°C or 17/11°C thermoperiods. Soybean roots contained more unsaturated fatty acids than broccoli roots, although broccoli roots showed a larger increase in unsaturation than soybean roots with decreased temperature. The fatty acid unsaturation in the roots of soybean began to increase rapidly after the temperature regime was changed. The increase was in the new roots produced in the cold regime rather than in the pre‐existing roots. The soybean leaf water and osmotic potentials decreased about 0.4 MPa, beginning one day after the transfer from 29/23°C to 17/11°C, but recovered significantly after 8 d. Plants grown at 17/11 °C had lower rates of photosynthesis and adaxial stomatal resistances, but higher root: shoot ratios and specific leaf weights compared to plants grown at 29/23°C. Plants grown and maintained at 29/23°C showed a steady increase in photosynthetic rates over the 8‐d experimental period, whether rates were measured in 1 mol m −3 or 9 mol m −3 oxygen. Plants transferred to 17/11°C however maintained constant rates of photosynthesis at 1 mol m −3 O 2 , whereas at 9 mol m −3 rates declined for 2 d then were constant for the remaining 6 d of the experimental period. These results suggest that changes in membrane fatty acid unsaturation is an important aspect of plant acclimation to chilling temperatures in terms of maintaining root permeability and water uptake. However, the degree of unsaturation is not a good indicator of differences in chilling tolerance among species. The apparent acclimation of photorespiration to a constant percentage of photosynthesis suggests a role of photorespiration in the plant. DA - 1980/12// PY - 1980/12// DO - 10.1111/1365-3040.ep11586908 VL - 3 IS - 6 SP - 435-441 J2 - Plant Cell Environ LA - en OP - SN - 0140-7791 1365-3040 UR - http://dx.doi.org/10.1111/1365-3040.ep11586908 DB - Crossref ER - TY - JOUR TI - Effects of decreasing source/sink ratio in soybeans on photosynthesis, photorespiration, transpiration and yield. AU - Peet, M. M. AU - Kramer, P. J. T2 - Plant, Cell and Environment AB - Abstract. Shading of all side leaflets of a determinate soybean cultivar during pod filling significantly increased rates of photosynthesis in the unshaded centre leaflets, compared to centre leaflets of controls. Higher rates were associated with both higher stomatal and mesophyll conductances, and were reversible within 2 days when shades were removed. These higher rates of photosynthesis were not associated with decreased percentage enhancement by low oxygen, indicating that treatment effects were probably not associated with changes in photorespiration relative to photosynthesis. Percentage enhancement did, however increase as the plants approached physiological maturity, chiefly because of a decrease in photosynthesis. In spite of these increases in rates of photosynthesis seed weight per plant was decreased by 37% in plants with side leaflets shaded for the entire pod‐filling period and by 28% in plants shaded for only the second half of the period. In plants where shades were removed during the second half of pod filling seed yield was reduced by only 19% because shade removal delayed leaf senescence. The four treatments reduced yield by different mechanisms. Plants shaded continuously during pod filling produced fewer seeds than controls, but the weight per seed was similar. When shading was applied during the second half of pod fillings seed number was unchanged but weight per seed was significantly reduced. In contrast when shades were removed for the second half of pod filling, seed number remained similar to that of continuously shaded plants, but seed weight increased. Although all shading treatments reduced yield, the reduction was not proportional to the 63% reduction in leaf area available for photosynthesis. This was because (1) photosynthetic rates in the centre leaflet of shaded plants were higher than rates in controls, (2) stem and lower surface photosynthesis in shaded leaf‐lets contributed to whole leaflet photosynthesis. DA - 1980/6// PY - 1980/6// DO - 10.1111/1365-3040.ep11581547 VL - 3 IS - 3 SP - 201-206 J2 - Plant Cell Environ LA - en OP - SN - 0140-7791 1365-3040 UR - http://dx.doi.org/10.1111/1365-3040.ep11581547 DB - Crossref ER - TY - JOUR TI - POLYGALACTURONASE ACTIVITY AND ETHYLENE SYNTHESIS DURING CUCUMBER FRUIT-DEVELOPMENT AND MATURATION AU - SALTVEIT, ME AU - MCFEETERS, RF T2 - PLANT PHYSIOLOGY AB - Polygalacturonase (EC 3.2.1.15) activity in seed cavity tissue from harvested cucumber fruit increased over 20-fold after the fruit had produced a transient burst of ethylene during maturation. This increase was observed in six cucumber cultivars and was present whether polygalacturonase activity was measured at pH 4.6 or 6.2. The seed cavity tissue pH decreased as polygalacturonase activity increased both in ripening fruit and in harvested immature fruit exposed to 10 microliters per liter ethylene in air. DA - 1980/// PY - 1980/// DO - 10.1104/pp.66.6.1019 VL - 66 IS - 6 SP - 1019-1023 SN - 1532-2548 ER - TY - JOUR TI - Light-stimulated ethylene production by germinating cucumber seeds AU - Saltveit, M. E., Jr. AU - Pharr, D. M. T2 - Journal of the American Society for Horticultural Science DA - 1980/// PY - 1980/// VL - 105 IS - 3 SP - 364 ER - TY - JOUR TI - Factors affecting rooting of Rhododendron maximum and Kalmia latifolia stem cuttings AU - Williams, R. F. AU - Bilderback, T. E. T2 - HortScience DA - 1980/// PY - 1980/// VL - 15 IS - 6 SP - 827 ER - TY - JOUR TI - Is chemical pinching of azaleas worthwhile? AU - Larson, R. A. AU - Hilliard, B. G. T2 - North Carolina Flower Growers' Bulletin DA - 1980/// PY - 1980/// VL - 24 IS - 2 SP - 1 ER - TY - CHAP TI - Gloxinias, African violets and other gesneriads AU - Kimmins, R. K. T2 - Introduction to floriculture PY - 1980/// SP - 287 PB - New York: Academic Press SN - 9780124376502 ER - TY - JOUR TI - Gamma irradiation and in vitro induced separation of chimeral genotypes in carnation AU - Johnson, R. T. T2 - HortScience DA - 1980/// PY - 1980/// VL - 15 IS - 5 SP - 605 ER - TY - JOUR TI - Effect of vitamin K5 and menadione on ripening, and ethylene and carbon dioxide production by apple and tomato fruit AU - Saltveit, M. E., Jr. T2 - Journal of the American Society for Horticultural Science DA - 1980/// PY - 1980/// VL - 105 IS - 2 SP - 252 ER - TY - CHAP TI - Begonias AU - Larson, R. A. T2 - Introduction to floriculture PY - 1980/// SP - 395 PB - New York: Academic Press SN - 9780124376502 ER - TY - CHAP TI - Azaleas AU - Larson, R. A. T2 - Introduction to floriculture PY - 1980/// SP - 237 PB - New York: Academic Press SN - 9780124376502 ER - TY - JOUR TI - An inexpensive chemical scrubber for oxidizing volatile organic contaminants in gases and storage room atmospheres AU - Saltveit, M. E., Jr. T2 - HortScience DA - 1980/// PY - 1980/// VL - 15 IS - 6 SP - 759 ER - TY - JOUR TI - Response variation of tulip cultivars to exogenous ethylene AU - Hertogh, A. A. De AU - Dilley, D. R. AU - Blakely, N. T2 - Acta Horticulturae DA - 1980/// PY - 1980/// SP - 205 ER - TY - JOUR TI - Internodal growth of the tulip during the greenhouse phase of standard forcing AU - Hertogh, A. A. De AU - Breg, T. T2 - Acta Horticulturae DA - 1980/// PY - 1980/// SP - 157 ER - TY - JOUR TI - Influence of reduced night temperatures on growth and flowering of 'May Shoesmith' chrysanthemums AU - Bonaminio, V. P. AU - Larson, R. A. T2 - Journal of the American Society for Horticultural Science DA - 1980/// PY - 1980/// VL - 105 IS - 1 SP - 9 ER - TY - JOUR TI - Chemical thinning response of Delicious apples to volume of applied water AU - Herrera-Aguirre, E. AU - Unrath, C. R. T2 - HortScience DA - 1980/// PY - 1980/// VL - 15 IS - 1 SP - 43 ER - TY - CHAP TI - Bulbous plants AU - Hertogh, A. De T2 - Introduction to floriculture PY - 1980/// SP - 215 PB - New York: Academic Press SN - 9780124376502 ER - TY - JOUR TI - Sampling procedure for foliar analysis of Kalanchoe blossfeldiana 'Feuerzauber' AU - Nelson, P. V. AU - Elliott, G. C. AU - Mingis, N. C. T2 - Journal of the American Society for Horticultural Science DA - 1980/// PY - 1980/// VL - 105 IS - 4 SP - 599 ER - TY - CHAP TI - Minor cut crops AU - Auman, C. W. T2 - Introduction to floriculture PY - 1980/// SP - 183 PB - New York: Academic Press SN - 9780124376502 ER - TY - JOUR TI - Vegetative propagation of Abies fraseri by stem cuttings AU - Hinesley, L. E. AU - Blazich, F. A. T2 - HortScience DA - 1980/// PY - 1980/// VL - 15 SP - 96-97 ER -