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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D.A Grantz, W.A. Retzlaff, L.E. Williams, and T.M. DeJong
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
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
Meng Wei, Aijun Zhang, Hongmin Li, Zhonghou Tang, and Xiaoguang Chen
deficiency and N re-supply on growth and quality of leaf-vegetable sweetpotato. Therefore, the objectives of this study were to 1) investigate the effect of N deficiency and subsequently N-resupply on growth, photosynthesis and related physiological processes
Soohyun Kang, Yating Zhang, Yuqi Zhang, Jie Zou, Qichang Yang, and Tao Li
Plant growth and development are largely affected by spectra properties of light through mediating photosynthesis and photomorphogenesis. UV radiation critically influences terrestrial plants, and many studies are now available concerning the effect
K.J. Boote and N.B. Pickering
. Goudriaan for their excellent suggestions for adapting the sunlit leaf area index approach for hedgerow canopies. We thank J. Norman for his advice on the model and E.B. Blazey and G. Bourgeois for their assistance with photosynthesis measurements. The cost
Tessa M. Mills, Jianming Li, and M. Hossein Behboudian
. Photosynthetic rate (Pn), g s , internal leaf CO 2 concentrations (C i ), and leaf temperature were determined on young but fully expanded leaves using a photosynthesis measurement system (LI-6400; LI-COR, Lincoln, NE). Photosynthetically active radiation ( PAR
Patrick Burgess and Bingru Huang
stresses ( Burgess and Huang, 2014 ; Ferreira et al., 2006 ; Huang et al., 2014 ; Jespersen et al., 2015 ; Kosová et al., 2011 ; Merewitz et al., 2011 ). In response to drought stress alone, the abundance of proteins involved in photosynthesis
Liang Zheng, Qi Zhang, Kexin Zheng, Shumei Zhao, Pingzhi Wang, Jieyu Cheng, Xuesong Zhang, and Xiaowen Chen
depths with three replicates. The measurement positions were adjusted with the growth of the plants ( Fig. 2 ). The temperature was measured from 5 June 2017 to 10 July 2017. Measurements of leaf photosynthesis and solar radiation transmittance. The P n
Toshio Shibuya, Ryosuke Endo, Yoshiaki Kitaya, and Saki Hayashi
. Contradictory results have been reported for NAR. Heraut-Bron et al. (1999) demonstrated that the R:FR did not affect photosynthesis per unit leaf area of white clover ( Trifolium repens L.). However, other reports demonstrated that low-R:FR light reduces the