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Xiaoya Cai, Youping Sun, Terri Starman, Charles Hall, and Genhua Niu

); stomatal conductance ( g S ); transpiration rate (E)] of 10 Earth-Kind ® rose cultivars (classified as salt-tolerant, moderately tolerant, and intolerant) irrigated with saline solution at electrical conductivity (EC) of 1.2 (control, nutrient solution

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Steve C. Yuza, Art L. Youngman, and John C. Pair

This study examined physical factors and physiological responses of five different ecotypes and cultivars of Acer saccharum and A. nigrum. The objective was to determine variations in leaf conductance and xylem water potential and correlations associated with their natural geographic distribution. Compared were two ecotypes of sugar maple, Caddo and Wichita Mountains, native to Oklahoma with cultivars Green Mountain and Legacy, plus black maple seedlings from Iowa. Measurements taken included leaf conductance, xylem water potential and soil water potential in a replicated block of 15-year-old trees. The two ecotypes had consistently higher photosynthetic rates, stomatal conductance and transpiration rates than other selections. Xylem water potentials were significantly higher for Caddo maples than Green Mountain, Legacy and Acer nigrum in both predawn and midday samples. This difference in water availability can be associated with a tendency for Caddo to vary its stomatal conductance. The other tree types maintained stable stomatal conductances.

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Leonardo Lombardini, Hermann Restrepo-Diaz, and Astrid Volder

the overall stomatal conductance ( g S ) was smaller in ‘Stuart’ or that the photosynthetic process in ‘Pawnee’ is somehow more efficient than in ‘Stuart’. Because g S has a proportionally greater effect on water vapor exchange than CO 2

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Krishna Nemali and Marc W. van Iersel

suggested increased levels of osmotic adjustment in vinca compared to salvia. Table 3. Average leaf water (Ψ L ), osmotic potential (Ψ s ), turgor potential (Ψ P ), and stomatal conductance ( g S ) to water at the start of the experiment and when plants

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Jean-Pierre Privé, Lindsay Russell, and Anita LeBlanc

leaf temperature and gas exchange responses [Pn, stomatal conductance ( g s ), intercellular CO 2 (Ci), and transpiration (E)] of ‘Ginger Gold’ apple [ Malus × sylvestris (L.) Mill var. domestica (Borkh.) Mansf.] leaves to a kaolin particle film

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Cristhian Camilo Chávez-Arias, Sandra Gómez-Caro, and Hermann Restrepo-Díaz

extracts (BE) of Echinacea purpurea , Potentilla erecta, and Aloe vera ] sprays on the stomatal conductance ( g S ) and water potential (Ψ wf ) of cape gooseberry plants at 11 ( A, C ) and 51 ( B, D ) days after inoculation (DAI) with (gray bars) and

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Gina E. Fernandez and Marvin P. Pritts

Stomatal and non-stomatal limitations to photosynthesis were determined for both primocanes and floricanes of “Titan” red raspberry. Limitations to photosynthesis were determined from the relationships between rates of photosynthesis (A), stomatal conductance (g), and the internal CO, concentration (Ci) of the leaf. We generated this data (A, g and Ci) using steady state gas exchange. Calculation of limitations were determined from A/Ci and A/g curves, second order polynomial regression and computer simulation. Using methods developed by Farquhar & Sharkey (1982), stomatal limitation during and after fruiting in both primocane and floricane leaves was approximately 28%. Non-stomatal limitations were determined through computer modeling and expressed as the maximum rates of carboxylation, Vcmax, and of electron transpont, Jmax.

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Ji Jhong Chen, Haifeng Xing, Asmita Paudel, Youping Sun, Genhua Niu, and Matthew Chappell

solution of 2.0 dS·m –1 ( Cirillo et al., 2016 , 2019 ). Table 2. Stomatal conductance ( g S ) of 12 viburnum taxa irrigated with a nutrient solution [electrical conductivity (EC) = 1.3 dS·m −1 ; control] or a saline solution [EC = 5.0 dS·m −1 (EC 5) or

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Yuting Meng, Boling Liu, Ping Zhang, Ping Cui, Yuguang Song, Nianwei Qiu, Guoliang Han, and Feng Zhou

) ( A ) and stomatal conductance ( g S ) ( B ) of Chinese cabbage leaves exposed to BDE-47 for 30 d. The bars are means ± sd (n = 5). Antioxidant defense system. Previous studies have reported that PBDEs can induce the generation of ROS and cause

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Julián Miralles-Crespo and Marc W. van Iersel

soilless substrates ( Nemali et al., 2007 ) was used. A total of four pots per experimental unit was measured each time. Measurements at the end of the experiment. Stomatal conductance and P n were measured at midday using a leaf photosynthesis system