Filters








982 Hits in 4.3 sec

Effects of foliage clumping on the estimation of global terrestrial gross primary productivity

Jing M. Chen, Gang Mo, Jan Pisek, Jane Liu, Feng Deng, Misa Ishizawa, Douglas Chan
2012 Global Biogeochemical Cycles  
For this purpose, we use not only leaf area index (LAI) but also the first ever global map of the foliage clumping index derived from the multiangle satellite sensor POLDER at 6 km resolution.  ...  The global average of this ratio is 35%.  ...  Through simulating tower flux data, we adjusted Where V cmax is the leaf maximum carboxylation rate at 25°C, J max is the maximum electron transport rate, N is the leaf nitrogen content, c n is the slope  ... 
doi:10.1029/2010gb003996 fatcat:w7urqpsgfrbfxodb2lzv4eklmq

Photosynthetic Metabolism under Stressful Growth Conditions as a Bases for Crop Breeding and Yield Improvement

Fermín Morales, María Ancín, Dorra Fakhet, Jon González-Torralba, Angie L. Gámez, Amaia Seminario, David Soba, Sinda Ben Mariem, Miguel Garriga, Iker Aranjuelo
2020 Plants  
The current review aims to analyze, from a multi-perspective approach (ranging across breeding, gas exchange, genomics, etc.) the impact of changing environmental conditions on the performance of the photosynthetic  ...  , and rising temperature) is a matter of great concern for the understanding of plant behavior under stress conditions, and for the development of new strategies and tools for enhancing plant growth in  ...  As already stated, g m is defined as the CO 2 diffusion to the site of carboxylation in the chloroplast through the leaf mesophyll.  ... 
doi:10.3390/plants9010088 pmid:31936732 pmcid:PMC7020424 fatcat:5x5dgywtbvcp5bcdiab54snxzi

Leaf optical properties reflect variation in photosynthetic metabolism and its sensitivity to temperature

Shawn P. Serbin, Dylan N. Dillaway, Eric L. Kruger, Philip A. Townsend
2011 Journal of Experimental Botany  
rates of RuBP carboxylation (V cmax ) and regeneration (J max )-measured with standard gas exchange techniques on leaves of trembling aspen and eastern cottonwood trees.  ...  Most of the wavelengths selected were correlated with known absorption features related to leaf water content, nitrogen concentration, internal structure, and/or photosynthetic enzymes.  ...  Acknowledgements This research was supported by grants from the University of Wisconsin-Madison Graduate School as well as a NASA Earth and Space Sciences Fellowship (NNX08AV07H) provided to SPS, a NASA  ... 
doi:10.1093/jxb/err294 pmid:21984647 pmcid:PMC3245480 fatcat:mfecxd5gjrfwrijrhzjgcnseyi

ePlant for quantitative and predictive plant science research in the big data era—Lay the foundation for the future model guided crop breeding, engineering and agronomy

Yi Xiao, Tiangen Chang, Qingfeng Song, Shuyue Wang, Danny Tholen, Yu Wang, Changpeng Xin, Guangyong Zheng, Honglong Zhao, Xin-Guang Zhu
2017 Quantitative Biology  
We finally discuss the recent formation of a global consortium, which includes experts in plant biology, computer science, statistics, agronomy, phenomics, etc. aiming to expedite the development and application  ...  The increase in global population, climate change and stagnancy in crop yield on unit land area basis in recent decades urgently call for a new approach to support contemporary crop improvements. ePlant  ...  This article is a perspective article and does not contain any studies with human or animal subjects performed by any of the authors.  ... 
doi:10.1007/s40484-017-0110-9 fatcat:fo5n3bmzdbdadapsds3joauxae

Sensitivity and Uncertainty Analyses of Flux-based Ecosystem Model towards Improvement of Forest GPP Simulation

Hanqing Ma, Chunfeng Ma, Xin Li, Wenping Yuan, Zhengjia Liu, Gaofeng Zhu
2020 Sustainability  
The ratio of internal CO2 to air CO2 ( f C i ) , canopy quantum efficiency of photon conversion ( α q ) , maximum carboxylation rate at 25 ° C ( V m 25 ) were the most sensitive parameters for the GPP.  ...  This study presents a global SA based on an extended Fourier amplitude sensitivity test (EFAST) method to quantify the sensitivities of 16 parameters in the Flux-based ecosystem model (FBEM).  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/su12072584 fatcat:dsw4jqh2tbflrem7n3hfql3axa

A Diel Flux Balance Model Captures Interactions between Light and Dark Metabolism during Day-Night Cycles in C3 and Crassulacean Acid Metabolism Leaves

C. Y. M. Cheung, M. G. Poolman, D. A. Fell, R. G. Ratcliffe, L. J. Sweetlove
2014 Plant Physiology  
With only minimal constraints, the model successfully captures many of the known features of C 3 leaf metabolism, including the recently discovered role of citrate synthesis and accumulation in the night  ...  The requirement to support continued export of sugar and amino acids from the leaf during the night and to meet overnight cellular maintenance costs forces the model to set aside stores of both carbon  ...  To explore the metabolic interaction between the day and the night, the model included a set of sugars and carboxylic acids to be used as carbon storage molecules.  ... 
doi:10.1104/pp.113.234468 pmid:24596328 pmcid:PMC4044858 fatcat:3tztjicohrdarlxg227l5luijy

Inference and prediction of metabolic network fluxes

Zoran Nikoloski, Richard Perez-Storey, Lee J. Sweetlove
2015 Plant Physiology  
In this Update, we cover the basic principles of the estimation and prediction of the rates of the many interconnected biochemical reactions that constitute plant metabolic networks.  ...  This includes metabolic flux analysis approaches that utilize the rates or patterns of redistribution of stable isotopes of carbon and other atoms to estimate fluxes, as well as constraints-based optimization  ...  Clearly, this will only generate average metabolic flux maps and not the flux maps of the individual cell types.  ... 
doi:10.1104/pp.15.01082 pmid:26392262 pmcid:PMC4634083 fatcat:wbpdi57wevallisnqcqavyqd4u

Detection of vegetation change using reconnaissance imagery

Herman H. Shugart, Nancy H. F. French, Eric S. Kasischke, James J. Slawski, Charles W. Dull, Robert A. Shuchman, Joe Mwangi
2001 Global Change Biology  
Inspection of archival and recent high-resolution reconnaissance imagery of tropical mountains shows, in all cases, features indicating an increase in the elevation of mountain vegetation zones and an  ...  These changes are consistent with an increased plant performance from increased levels of carbon dioxide in the atmosphere as well as with a warmer or more favourable climate.  ...  and Mapping Agency and Mr Norman P.  ... 
doi:10.1046/j.1365-2486.2001.00379.x fatcat:gsx5d4tdazc5tinl3pacxxbtfi

Contribution of Incorporating the Phosphorus Cycle into TRIPLEX-CNP to Improve the Quantification of Land Carbon Cycle

Juhua Ding, Qiuan Zhu, Hanwei Li, Xiaolu Zhou, Weiguo Liu, Changhui Peng
2022 Land  
Based on sensitivity analysis results, we identified the phosphorus resorption coefficient of leaf (rpleaf) as the most influential parameter to gross primary productivity (GPP) and biomass, and determined  ...  However, only a few global land surface models have incorporated P cycle and used to investigate the interactions of C-N-P and its limitation on terrestrial ecosystems.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/land11060778 fatcat:wqzishdofjgbvimp27krsf76qy

SoyCSN: Soybean context-specific network analysis and prediction based on tissue-specific transcriptome data

Juexin Wang, Md Shakhawat Hossain, Zhen Lyu, Jeremy Schmutz, Gary Stacey, Dong Xu, Trupti Joshi
2019 Plant Direct  
The Soybean Gene Atlas project provides a comprehensive map for understanding gene expression patterns in major soybean tissues from flower, root, leaf, nodule, seed, and shoot and stem.  ...  For example, under symbiotic, nitrogen-fixing conditions, the constructed soybean leaf network highlights the connection between the photosynthesis function and rhizobium-legume symbiosis.  ...  ACK N OWLED G M ENTS This work has been supported by the National Science Foundation CO N FLI C T O F I NTE R E S T The authors declare no conflict of interest associated with the work described in  ... 
doi:10.1002/pld3.167 pmid:31549018 pmcid:PMC6747016 fatcat:7qe32rij2ng5znvhmu2cbkyzqi

Estimation of vegetation photosynthetic capacity from space-based measurements of chlorophyll fluorescence for terrestrial biosphere models

Yongguang Zhang, Luis Guanter, Joseph A. Berry, Joanna Joiner, Christiaan van der Tol, Alfredo Huete, Anatoly Gitelson, Maximilian Voigt, Philipp Köhler
2014 Global Change Biology  
Abstract Photosynthesis simulations by terrestrial biosphere models are usually based on the Farquhar's model, in which the maximum rate of carboxylation (V cmax ) is a key control parameter of photosynthetic  ...  Our results support the use of space-based SIF data as a proxy for photosynthetic capacity and suggest the potential for global, time-resolved estimates of V cmax .  ...  The work by YZ and LG has been funded by the Emmy Noether Programme (GlobFluo project) of the German Research Foundation. JJ was supported by the NASA Carbon Cycle Science program (NNH10DA001N).  ... 
doi:10.1111/gcb.12664 pmid:24953485 fatcat:leqnhgnmk5awnojoeh3ogegb7y

Can increased leaf photosynthesis be converted into higher crop mass production? A simulation study for rice using the crop model GECROS

Xinyou Yin, Paul C. Struik
2017 Journal of Experimental Botany  
; and (9) a mechanism that combines the low ATP cost of the cyanobacterial CCM and the high photosynthetic capacity per unit leaf nitrogen.  ...  To supercharge crop productivity, exploring a combination of routes in improving the CCM, photosynthetic capacity, and quantum efficiency is required.  ...  Acknowledgements This research is financed in part by the BioSolar Cells open innovation consortium, supported by the Dutch Ministry of Economic Affairs, Agriculture and Innovation.  ... 
doi:10.1093/jxb/erx085 pmid:28379522 pmcid:PMC5447886 fatcat:oi3455z3bja6zkw6ahlwwuh5x4

Modeling and Monitoring Terrestrial Primary Production in a Changing Global Environment: Toward a Multiscale Synthesis of Observation and Simulation

Shufen Pan, Hanqin Tian, Shree R. S. Dangal, Zhiyun Ouyang, Bo Tao, Wei Ren, Chaoqun Lu, Steven Running
2014 Advances in Meteorology  
As a case, we have shown the performance of the dynamic land ecosystem model (DLEM) at various scales from site to region to global.  ...  There is a critical need to monitor and predict terrestrial primary production, the key indicator of ecosystem functioning, in a changing global environment.  ...  Acknowledgments This research has been supported by NSF Decadal and Regional Climate Prediction using Earth System Models (AGS-1243220, NSF Dynamics of Coupled Natural and Human Systems (1210360), NSF  ... 
doi:10.1155/2014/965936 fatcat:ylofvfhvrrf2bdwu7w7onzayf4

Global evaluation of the nutrient-enabled version of the land surface model ORCHIDEE-CNP v1.2 (r5986)

Yan Sun, Daniel S. Goll, Jinfeng Chang, Philippe Ciais, Betrand Guenet, Julian Helfenstein, Yuanyuan Huang, Ronny Lauerwald, Fabienne Maignan, Victoria Naipal, Yilong Wang, Hui Yang (+1 others)
2021 Geoscientific Model Development  
Components of the N and P cycle at different levels of aggregation (from local to global) are in good agreement with data-driven estimates.  ...  In this study, we evaluated the performance of the global version of the land surface model ORCHIDEE-CNP (v1.2), which explicitly simulates N and P biogeochemistry in terrestrial ecosystems coupled with  ...  This research has been supported by the IMBALANCE-P project of the European Research Council (grant no. ERC-2013-SyG610028). Review statement.  ... 
doi:10.5194/gmd-14-1987-2021 fatcat:zwjhvph2nzdbjonxvtok2uqika

Simulating functional diversity of European natural forests along climatic gradients

Kirsten Thonicke, Maik Billing, Werner Bloh, Boris Sakschewski, Ülo Niinemets, Josep Peñuelas, J. Hans C. Cornelissen, Yusuke Onoda, Peter Bodegom, Michael E. Schaepman, Fabian D. Schneider, Ariane Walz
2020 Journal of Biogeography  
nitrogen content per leaf area, mg/g) and V cmax (maximum carboxylation rate of the RUBISCO enzyme per leaf area at 25°C, μmol CO 2 m −2 s −1 ).  ...  The functionally related plant traits leaf longevity (LL), leaf N and Vcmax (maximum carboxylation rate of Rubisco per leaf area) are assigned in a third step to the sapling following the LES approach  ... 
doi:10.1111/jbi.13809 fatcat:q765mp5knrg3fm4hjlpprskucy
« Previous Showing results 1 — 15 out of 982 results