Search Results

You are looking at 51 - 60 of 2,274 items for :

  • photosynthesis x
  • Refine by Access: All x
Clear All
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

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

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

Free access

Xing-Zheng Fu, Fei Xing, Li Cao, Chang-Pin Chun, Li-Li Ling, Cai-Lun Jiang, and Liang-Zhi Peng

and g s , resulting in reduction of photosynthesis ( Sharma et al., 1995 ). Application of the three Zn fertilizers on Zn-deficient leaves significantly increased their chlorophyll levels and photosynthetic activities, especially when organosilicone

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

Chi D. Nguyen, Matthew Creech, Diying Xiang, German Sandoya, Dean Kopsell, and Heqiang Huo

weight measurements were recorded after 35 d under the light treatment to minimize leaf senescence. Morphological and photosynthesis measurements. The response of net photosynthesis to incident PPFD was measured using the third leaf from the top

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

Open access

Robert A. Kennedy, Theodore C. Fox, and Wayne H. Loescher

Abstract

The rate and efficiency of photosynthesis (PS) is unquestionably one of the primary determinants of crop yield. Yet, as this symposium illustrates, many other factors contribute to plant productivity. Indeed, the exact relationship between PS rate and yield remains undefined. For several years we have now been interested in factors that affect PS rate in both C3 and C4 plants, not only within the plant, but also external to it. Internal factors affecting PS that will be discussed include leaf age, leaf canopy, photorespiration, stage of plant development (including both vegetative and reproductive phases), and the occurrence of little-recognized metabolic pathways such as polyol synthesis and transport. External factors that affect PS, in addition to obvious environmental determinants such as temperature, light, and water, include the seasonal growth cycle. While we still do not understand how all of these factors interact to affect yield, we are beginning to understand their singular effects. Control of these factors, once thought to be within reach even before the advent of biotechnology, remains likely, but distant.

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