Search Results

You are looking at 41 - 50 of 1,946 items for :

  • "photosynthesis" x
  • All content x
Clear All
Free access

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

Full access

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

Free access

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

Open access

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

Free access

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

Free access

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

Free access

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

Free access

S. Kumudini

Cranberry [Vaccinium macrocarpon (Ait.)] yield has been associated with photosynthate supply. However, the impact of temperature and radiation on photosynthesis of the cranberry plant is not well understood. The objective of this experiment was to characterize the photosynthetic response to radiation and temperature in order to develop a model for estimation of cranberry photosynthetic rates. Two cranberry cultivars, `Stevens' and `Ben Lear', were tested for photosynthetic response at air temperatures ranging from 15 to 35 °C and radiation intensities from 200 to 1200 μmol·m-2·s-1. Depending on temperature, maximum photosynthesis (Pmax) was ≈10 or 12 μmol CO2/m2/s (net photosynthesis) and the saturating radiation level was estimated to be 600 to 800 μmol·m-2·s-1. Cranberry quantum yield was estimated as 0.03 mol CO2/mol photon. Both models; Blackman and the nonrectangular hyperbola with a Θ (angle of curvature) of 0.99 were a good fit for measured photosynthetic rates under controlled environment conditions. The disparity between modeled predicted values, and observed values in the field around midday, indicates a reduction in potential photosynthetic rates in a diurnal cycle that is consistent with the phenomenon of midday depression.

Free access

Paul Deram, Mark G. Lefsrud, and Valérie Orsat

electrical conversion efficiency ( Gomez et al., 2013 ). HPS lamps were tailored for human vision and therefore are not ideally suited for plant growth ( Bula et al., 1991 ). Earlier research has shown that the most important wavelengths for photosynthesis

Free access

Tessa Pocock

signaling networks involved. The photoreceptor (PR) network involves light absorption by phytochromes (PHY), cryptochromes (CRY) and the light oxygen voltage PRs, phototropin (PHO), and zeitlupe (ZTL). The photosynthesis (PSN) sensing and signaling network