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Yahia Othman, Dawn VanLeeuwen, Richard Heerema, and Rolston St. Hilaire

the leaf in response to water deficit ( Cifre et al., 2005 ). As plants transition from no or low water deficit to moderate plant water deficit, g S generally declines into the 0.05 to 0.15 mol·m −2 ·s −1 H 2 O range, photosynthesis and

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F. Todd Lasseigne, Stuart L. Warren, Frank A. Blazich, and Thomas G. Ranney

by comparing temperature sensitivity of growth, basic physiological processes such as photosynthesis, and survival across a range of temperatures ( Burke, 1990 , 1995 ; Hopkins, 1999 ; Lambers et al., 1998 ; Larcher, 1994 ; Leegood, 1995 ). The

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Sasmita Mishra, Scott Heckathorn, Jonathan Frantz, Futong Yu, and John Gray

roles of B in plant function, apart from the structural function in walls ( Bolaños et al., 2004 ). For example, it is currently debated as to whether effects of B deficiency (or toxicity) on photosynthesis are primary or secondary, or early or late

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Jinmin Fu and Peter H. Dernoeden

injury to plants would be expected to result in an increase in respiration and possibly a reduction in photosynthesis. A concomitant decrease in photosynthesis and increase in respiration could cause a harmful depletion of carbohydrates. Few studies have

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María José Gómez-Bellot, Pedro Antonio Nortes, María Fernanda Ortuño, María Jesús Sánchez-Blanco, Karoline Santos Gonçalves, and Sebastián Bañón

, every ≈1.5 h in five plants per treatment. Leaf g S and net photosynthesis were determined in leaves exposed to sunlight using a gas exchange system (LI-6400; LI-COR Inc.) fixing the conditions of CO 2 concentration at 380 ppm, the photosynthetically

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Richard J. Heerema, Dawn VanLeeuwen, Marisa Y. Thompson, Joshua D. Sherman, Mary J. Comeau, and James L. Walworth

( Walworth et al., 2016 ) and, presumably, higher leaf area index. Fig. 2. Net photosynthesis of leaves from immature ‘Wichita’ pecan trees receiving soil applications of Zn-ethylenediaminetetraacetic acid at annual rates of 2.2 kg·ha −1 Zn [Zn1 (gray bars

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Qianqian Sheng and Zunling Zhu

overall reduction in growth but no obvious signs of visible damage ( Wellburn, 1990 ) and mainly affect the physiological metabolism of plants. Chlorophyll (Chl) is the most important plant pigment because it has a crucial role in photosynthesis ( Croft et

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D.A Grantz, W.A. Retzlaff, L.E. Williams, and T.M. DeJong

Models indicate that ozone inhibits carbon assimilation largely in the upper canopy, due to light and ozone gradients. We document yield reductions and ozone gradients in Casselman plum in open-top ozone fumigation chambers. Ambient air (12 hr mean ozone = 0.050 ppm), charcoal filtered air (0.034 ppm) and ambient air plus added ozone (0.094 ppm) were circulated in the chambers. Additional trees grew outside the chambers (0.058 ppm). Outside the chambers large vertical and horizontal gradients in ozone within the canopy were documented, but these were absent in the chambers. Ozone decreased leaf photosynthesis by 31% and 58%, and fruit yield by 20% and 66%, in the ambient and ozone enriched relative to filtered chambers. Despite altered gradients, yield and photosynthesis of exposed leaves were similar inside and outside the chambers in ambient air. Compensatory changes in leaf function may be involved.

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Maren J. Mochizuki, Oleg Daugovish, Miguel H. Ahumada, Shawn Ashkan, and Carol J. Lovatt

strawberry ( CDFA, 2007 ). While numerous studies provide evidence of the physiological effect of elevated CO 2 concentration on many plant species in growth chambers, research on raspberry examined physiological processes such as photosynthesis, but yield

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Haijie Dou, Genhua Niu, Mengmeng Gu, and Joseph G. Masabni

were observed, which were lower than the basil grown under DLIs of 28.8 and 34.6 mol·m −2 ·d −1 in a growth chamber, respectively ( Beaman et al., 2009 ). In a glasshouse condition, there was no difference in photosynthesis of ‘Genovese’ basil between