Photosynthesis, nitrogen-use efficiency, and water-use efficiency of jack pine seedlings in competition with four boreal forest plant species

Robinson, Darren E.; Wagner, Robert G.; Bell, Frederick W.; Swanton, Clarence J.

doi:10.1139/x01-133

Cited by 40 publications

(8 citation statements)

References 26 publications

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“…The individual component may cover effects of diverse origins but always includes a genetic effect; see Bradshaw and Settler (1995) and Danusevicius (2001) for the effect of genetic factors on annual shoot length and Segura et al (2008) for the effect of genetic factors on tree architecture. Other effects correspond to the local environment of each individual; see Waring et al (1987) and Lefèvre et al (1994) for the impact of pathogen infestation on leaf photosynthesis and Robinson et al (2001), Pinno et al (2001) and Dolezal et al (2004) for the competition between plants for light resources. These factors are rarely measurable retrospectively for each individual (Heuret et al, 2003) and when accessible, the measurements are time consuming (Jalkanen et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Identifying ontogenetic, environmental and individual components of forest tree growth

et al. 2009

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† Background and Aims This study aimed to identify and characterize the ontogenetic, environmental and individual components of forest tree growth. In the proposed approach, the tree growth data typically correspond to the retrospective measurement of annual shoot characteristics (e.g. length) along the trunk. † Methods Dedicated statistical models (semi-Markov switching linear mixed models) were applied to data sets of Corsican pine and sessile oak. In the semi-Markov switching linear mixed models estimated from these data sets, the underlying semi-Markov chain represents both the succession of growth phases and their lengths, while the linear mixed models represent both the influence of climatic factors and the inter-individual heterogeneity within each growth phase. † Key Results On the basis of these integrative statistical models, it is shown that growth phases are not only defined by average growth level but also by growth fluctuation amplitudes in response to climatic factors and inter-individual heterogeneity and that the individual tree status within the population may change between phases. Species plasticity affected the response to climatic factors while tree origin, sampling strategy and silvicultural interventions impacted inter-individual heterogeneity. † Conclusions The transposition of the proposed integrative statistical modelling approach to cambial growth in relation to climatic factors and the study of the relationship between apical growth and cambial growth constitute the next steps in this research.

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Section: Introductionmentioning

confidence: 99%

Identifying ontogenetic, environmental and individual components of forest tree growth

et al. 2009

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“…The ideal desert plants tends to exhibit optimum balance between water conservation and productivity mechanisms depending on the aridity of the environment, productivity of plants in dry environments is enhanced by maximizing assimilation and minimizing water evaporated in relation to water availability to improve WUE (Sambatti & Caylor, 2007;Jones, 2014).The photosynthetic water use efficiency (WUE) is associated with the plant's optimum water use (Robinson et al, 2001;Larcher, 2003;Novriyanti et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Ecophysiological Responses of Acacia raddiana savi and Acacia nilotica (L.) During Seedling Establishment in Extreme Arid Conditions

Radwan

Abouelkasim

2020

Egypt. J. Bot.

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T HE PRESENT investigation involves the studies of physiological responses of A. raddiana (savi) Brenan and A. nilotica (L.) seedlings under extreme arid conditions. Experiments were performed in a hyper arid environment to study the effects of drought stress using different water regimes at 12%, 9%, 6%, 4% and 2%. Photosynthesis and transpiration rate were measured under full Photosynthetic Active Radiationrange (0-2500μmols -1 m -2 ) and instantaneous water use efficiency was calculated.A. raddiana and A. nilotica showed maximum photosynthesis rate under 4% and 12% soil moisture content, respectively at high Photosynthetic Active Radiation levels, maximum transpiration rate of A. raddiana recorded at 4% soil moisture content and at 9% soil moisture content in A. nilotica at highest Photosynthetic Active Radiation. The maximum instantaneous water use efficiency was noticed in A. raddiana at 12% soil moisture content, while A. nilotica showed maximum instantaneous water use efficiency at 6% soil moisture content at high Photosynthetic Active Radiation level.A. raddiana acted as water spender ideal desert plant at high Photosynthetic Active Radiation. Other wise A. nilotica maximised photosynthesis rate and minimised transpiration rate giving maximum instantaneous water use efficiency at high Photosynthetic Active Radiation and low soil moisture content levels.

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“…Therefore, low PNUE in D. odorifera and E. fordii may lead to high stress-tolerance traits and increase competitiveness in poor soil [67]. Higher PNUE species such as B. alnoides and C. hystrix could grow faster [16] and have a stronger competitive ability in ecosystems with fertile soil [68].…”

Section: Discussionmentioning

confidence: 99%

Seedling leaves allocate lower fractions of nitrogen to photosynthetic apparatus in nitrogen fixing trees (Dalbergia odorifera and Erythrophleum fordii) than in non-nitrogen fixing trees (Betula alnoides and Castanopsis hystrix) in subtropical China

Tang

Sun

Cheng

et al. 2018

Preprint

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Photosynthetic-nitrogen use efficiency (PNUE) is a useful trait to characterize leaf economics, physiology, and strategy. In this study, we investigated the differences in PNUE, leaf nitrogen (N) allocation, and mesophyll conductance (gm) in Dalbergia odorifera and Erythrophleum fordii (N-fixing trees), and Betula alnoides and Castanopsis hystrix (non-N-fixing trees). Seedlings of the four species were cultured in pots and received the same nutrient solution, water volume, and light. LiCor-6400 was used to determine fluorescence yield, photosynthetic response to light, and intercellular CO2 concentration (Ci). N allocation fractions in the photosynthetic apparatus were calculated according to Niinemets and Tenhunen method; gm was calculated according to variable J, EDO, and A-Ci curve fitting methods. PNUE of D. odorifera and E. fordii were significantly lower than those of B. alnoides and C. hystrix because of their allocation of a lower fraction of leaf N to Rubisco (PR) and bioenergetics (PB). Mesophyll conductance had a significant positive correlation with PNUE in D. odorifera, E. fordii, and B. alnoides. The fraction of leaf N to cell wall (PCW) had a significant negative correlation with PR in B. alnoides and C. hystrix. We conclude that B. alnoides and C. hystrix optimized their leaf N allocation toward photosynthesis, with the trade-off being N allocation to the cell wall and Rubisco. Thus, these two species may have a higher competitive ability in natural ecosystems with fertile soil.

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Photosynthesis, nitrogen-use efficiency, and water-use efficiency of jack pine seedlings in competition with four boreal forest plant species

Cited by 40 publications

References 26 publications

Identifying ontogenetic, environmental and individual components of forest tree growth

Identifying ontogenetic, environmental and individual components of forest tree growth

Ecophysiological Responses of Acacia raddiana savi and Acacia nilotica (L.) During Seedling Establishment in Extreme Arid Conditions

Seedling leaves allocate lower fractions of nitrogen to photosynthetic apparatus in nitrogen fixing trees (Dalbergia odorifera and Erythrophleum fordii) than in non-nitrogen fixing trees (Betula alnoides and Castanopsis hystrix) in subtropical China

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