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Title: Photosynthetic responses to altitude: an explanation based on optimality principles

Journal Article · · New Phytologist
DOI:https://doi.org/10.1111/nph.14332· OSTI ID:1379706
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Northwest A&F Univ., Yangling (China); Macquarie Univ., NSW (Australia)
  2. Northwest A&F Univ., Yangling (China); Macquarie Univ., NSW (Australia); Imperial College, London (United Kingdom)
  3. Imperial College, London (United Kingdom); US Dept. of Agriculture (USDA)., Ithaca, NY (United States)
  4. Macquarie Univ., NSW (Australia); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Macquarie Univ., NSW (Australia)
  6. Northwest A&F Univ., Yangling (China); Univ. of Quebec (Canada)

Ecophysiologists have long been fascinated by the photosynthetic behaviour of alpine plants, which often have to withstand extreme environmental pressures (Gale, 1972; Friend&Woodward, 1990; Korner, 2003, 2007; Shi et al., 2006). About 8%of the world’s land surface is above 1500 maltitude (Korner, 2007). High altitudes can be climatically unusual, often with (for example) low temperatures, strong winds, and now high rates of warming (Korner, 2003; Pepin &Lundquist, 2008; Rangwala&Miller, 2012). Moreover, the low atmospheric pressure provides a set of environmental conditions unique on Earth (Table 1). There has been extensive speculation about altitudinal effects on photosynthesis and, in particular, how to account for the puzzling – but consistently observed – tendencies towards higher carbon dioxide (CO2) drawdown (low ratio of leafinternal to ambient CO2 partial pressures (ci:ca; hereafter, v), resulting in low carbon isotope discrimination) and higher carboxylation capacity (Vcmax) with increasing altitude (Gale, 1972; Korner & Diemer, 1987; Friend et al., 1989; Terashima et al., 1995; Bresson et al., 2009; Zhu et al., 2010). At first glance, it might be expected that CO2 assimilation rates would be reduced at high altitudes due to the low partial pressure of CO2 (Friend & Woodward, 1990). But, actual measured photosynthetic rates are usually as high as, or even higher than, those at low altitudes (Machler & Nosberger, 1977; Korner & Diemer, 1987; Cordell et al., 1999; Shi et al., 2006).

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231; DE‐AC02‐05CH11231
OSTI ID:
1379706
Alternate ID(s):
OSTI ID: 1400592
Journal Information:
New Phytologist, Vol. 213, Issue 3; ISSN 0028-646X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 61 works
Citation information provided by
Web of Science

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Cited By (10)

Drivers of leaf carbon exchange capacity across biomes at the continental scale journal June 2018
Leaf gas exchange and photosynthesis curves of Elymus nutans and Potentilla anserina under fencing and grazing conditions in the Qilian Mountains, Northwest China journal June 2019
Tree-ring isotopes suggest atmospheric drying limits temperature–growth responses of treeline bristlecone pine journal May 2019
Global photosynthetic capacity is optimized to the environment journal January 2019
Comparing optimal and empirical stomatal conductance models for application in Earth system models journal October 2018
Late Quaternary ecotone change between sub-alpine and montane forest zone on the leeward northern slope of Mt. Kilimanjaro journal May 2018
New insights into the covariation of stomatal, mesophyll and hydraulic conductances from optimization models incorporating nonstomatal limitations to photosynthesis journal October 2017
Ecosystem responses to elevated CO 2 governed by plant-soil interactions and the cost of nitrogen acquisition journal November 2017
The validity of optimal leaf traits modelled on environmental conditions journal October 2018
Historical changes in the stomatal limitation of photosynthesis: empirical support for an optimality principle journal December 2019

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