About
51
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Introduction
Tsu-Wei holds a professorship and DFG Emmy-Noether Program. He works on up-scaling the environmental effects on leaf photosynthesis to canopy level using functional-structural plant models and systems analyses. He is specialized in deciphering the triple feedbacks between environmental triggers, dynamic canopy architectures and physiological functions. He focusses on model-assisted high-throughput phenotyping and acclimation mechanisms optimizing canopy photosynthesis.
Additional affiliations
September 2020 - present
September 2019 - August 2020
April 2017 - August 2019
Education
October 2011 - October 2015
October 2009 - September 2011
September 2002 - July 2007
Publications
Publications (51)
Multi-genotype canopies are frequent in phenotyping experiments and raise increasing interest in agriculture. Radiation interception efficiency (RIE) and radiation use efficiency (RUE) have low heritabilities in such canopies. We propose a revised Monteith equation that identifies environmental and genetic components of RIE and RUE. An environmenta...
Tsu-Wei Chen is a professor at Humboldt University in Berlin, Germany. He is also a grantee of Emmy Noether Programm of German Research Foundation (DFG). He earned his BSc. at National Taiwan University in Horticultural Science. He has worked on functional-structural plant models (FSPM) since 2009, beginning with his MSc. and PhD degrees from Leibn...
Major global crops in high-yielding, temperate cropping regions are facing increasing threats from the impact of climate change, particularly from drought and heat at critical developmental timepoints during the crop lifecycle. Research to address this concern is frequently focused on attempts to identify exotic genetic diversity showing pronounced...
The world cropping area for wheat exceeds that of any other crop, and high grain yields in intensive wheat cropping systems are essential for global food security. Breeding has raised yields dramatically in high-input production systems; however, selection under optimal growth conditions is widely believed to diminish the adaptive capacity of culti...
Yield development of agricultural crops over time is not merely the result of genetic and agronomic factors, but also the outcome of a complex interaction between climatic and site‐specific soil conditions. However, the influence of past climatic changes on yield trends remains unclear, particularly under consideration of different soil conditions....
Societal Impact Statement
Refining circular multitrophic food production methods, which integrate plant, fish, and insect outputs, is imperative for environmental sustainability. Our findings suggest that the right protein choices in fish feed, like black soldier fly meal and poultry meal, can notably enhance the nutrient profile of fish waste wate...
Crop varieties differing in architectural characteristics (AC) vary in their intra-canopy light distribution. To optimize canopy photosynthesis, we hypothesize that varieties with contrasting AC possess different photosynthetic acclimation strategy (PAS) with respect to photosynthetic nitrogen (Np) partitioning. We firstly used in silico experiment...
In cereal crops, environmental fluctuations affect different physiological processes during various developmental phases associated with the formation of yield components. Because these effects are coupled with cultivar-specific phenology, studies investigating environmental responses in different cultivars can give contradictory results regarding...
Key message
Using in silico experiment in crop model, we identified different physiological regulations of yield and yield stability, as well as quantify the genotype and environment numbers required for analysing yield stability convincingly.
Abstract
Identifying target traits for breeding stable and high-yielded cultivars simultaneously is diffi...
One-dimensional light models using the Beer-Lambert equation (BL) with the light extinction coefficient k are simple and robust tools for estimating light interception of homogeneous canopies. Functional-structural plant models (FSPMs) are powerful to capture light-plant interactions in heterogeneous canopies, but they are also more complex due to...
In the face of a changing climate, yield stability is becoming increasingly important for farmers and breeders. Long-term field experiments (LTEs) generate data sets that allow the quantification of stability for different agronomic treatments. However, there are no commonly accepted guidelines for assessing yield stability in LTEs. The large diver...
In the face of a changing climate, yield stability is becoming increasingly important for farmers and breeders. Long-term field experiments (LTEs) generate data sets that allow the quantification of stability for different agronomic treatments. However, there are no commonly accepted guidelines for assessing yield stability in LTEs. The large diver...
Cucumber (Cucumis sativus L.), an important vegetable crop, is sensitive to NaCl. Its salinity tolerance can be improved by grafting onto pumpkin rootstocks, which restricts the uptake of Na+, but not of Cl−. Although Na+ seems to be more toxic than Cl− in cucumber, tissue tolerance to Na+ and Cl− is still unclear. In this study, a mixed-salt exper...
This book on the physiology of vegetable crops focuses on the activities and functions of vegetables, defined as herbaceous plants that are harvested for edible parts that can be consumed fresh or with little preparation. Physiology deals with the growth and development processes of these plants, and while this book is focused primarily on the orga...
This book on the physiology of vegetable crops focuses on the activities and functions of vegetables, defined as herbaceous plants that are harvested for edible parts that can be consumed fresh or with little preparation. Physiology deals with the growth and development processes of these plants, and while this book is focused primarily on the orga...
Acclimation of leaf traits to fluctuating environments is a key mechanism to maximize fitness. One of the most important strategies in acclimation to changing light is to maintain efficient utilization of nitrogen in the photosynthetic apparatus by continuous modifications of between-leaf distribution along the canopy depth and within-leaf partitio...
Optimizing the interplay between sinks and sources is of crucial importance for breeding progress in winter wheat. However, the physiological limitations of yield from source (e.g. green canopy duration, GCD) and sink (e.g. grain number) are still unclear. Furthermore, there is little information on how the source traits have been modified during t...
In the era of high-throughput visual plant phenotyping, it is crucial to design fully automated and flexible workflows able to derive quantitative traits from plant images. Over the last years, several software supports the extraction of architectural features of shoot systems. Yet currently no end-to-end systems are able to extract both 3D shoot t...
Leaves adapted to diurnal light fluctuation (FL) tend to have reduced photosynthetic parameters in comparison with those grown under constant light but intercepting the same daily photon integral (DPI). This reduction may result from a non-linear relationship between photosynthetic protein synthesis rate (PPSR) and incident photosynthetically activ...
Plants acclimatize their photosynthetic functions in leaves constantly to the fluctuating light, thereby optimizing the use of photosynthetic nitrogen (Nph) at the canopy level. To investigate the complex interplay between external signals during the acclimation processes, a mechanistic model based on the concept of protein turnover (synthesis and...
Background and Aims
Most crop species are glycophytes, and salinity stress is one of the most severe abiotic stresses reducing crop yields worldwide. Salinity affects plant architecture and physiological functions by different mechanisms, which vary largely between crop species and determine the susceptibility or tolerance of a crop species to sali...
Gas exchange ( GE ) and chlorophyll fluorescence ( CF ) measurements are widely used to noninvasively study photosynthetic parameters, for example the rates of maximum Rubisco carboxylation ( V cmax ), electron transport rate ( J ), daytime respiration ( R d ) and mesophyll conductance ( g m ).
Existing methods for fitting GE data (net assimilation...
Water use efficiency (WUE) is considered as a determinant of yield under stress and a component of crop drought resistance. Stomatal behavior regulates both transpiration rate and net assimilation and has been suggested to be crucial for improving crop WUE. In this work, a dynamic model was used to examine the impact of dynamic properties of stomat...
Water use efficiency (WUE) is considered as a determinant of yield under stress and a component of crop drought resistance. Stomatal behavior regulates both transpiration rate and net assimilation and has been suggested to be crucial for improving crop WUE. In this work, a dynamic model was used to examine the impact of dynamic properties of stomat...
A major issue of our today's research is to help meeting the challenges of future food security. One task is to assess and develop crop management strategies adapted to predicted future climatic conditions. Yet, both the variability of environmental conditions and the uncertainty of climate projections as well as the orchestra of multiple plant res...
Plant performance is significantly influenced by prevailing light and temperature conditions during plant growth and development. For plants exposed to natural fluctuations in abiotic environmental conditions it is however laborious and cumbersome to experimentally assign any contribution of individual environmental factors to plant responses. This...
Knowledge about the mechanisms of salt tolerance of crop species is necessary for designing new cultivars or strategies to improve crop performance under salinity, a widespread abiotic stress. Cucumber and tomato belong to the most important greenhouse vegetable crops and are often cultivated in regions exposed to salinity or in hydroponic systems,...
Tomato (Solanum lycopersicum L.) is an important vegetable crop and often cultivated in regions exposed to salinity and high temperatures (HT) which change plant architecture, decrease canopy light interception and disturb physiological functions. However, the long-term effects of salinity and HT combination (S+HT) on plant growth are still unclear...
Plant performance is significantly influenced by prevailing light and temperature conditions during plant growth and development. For plants exposed to natural fluctuations in abiotic environmental conditions it is however laborious and cumbersome to experimentally assign any contribution of individual environmental factors to plant responses. This...
Tomato (Solanum lycopersicum L.) is an important vegetable crop and often cultivated in regions exposed to salinity and high temperatures (HT) which change plant architecture, decrease canopy light interception and disturb physiological functions. However, the long-term effects of salinity and HT combination (S+HT) on plant growth are still unclear...
There are conflicting opinions on the relative importance of photosynthetic limitations under salinity. Quantitative limitation analysis of photosynthesis provides insight into the contributions of different photosynthetic limitations, but it has only been applied under saturating light conditions. Using experimental data and modeling approaches, w...
There is increasing interest in evaluating the environmental effects on crop architectural traits and yield improvement. However, crop models describing the dynamic changes in canopy structure with environmental conditions and the complex interactions between canopy structure, light interception, and dry mass production are only gradually emerging....
Background and Aims Maximizing photosynthesis at the canopy level is important for enhancing crop yield, and this requires insights into the
limiting factors of photosynthesis. Using greenhouse cucumber (Cucumis sativus) as an example, this study provides a novel approach to quantify different components of photosynthetic limitations at the
leaf le...
The determination of maximum chlorophyll fluorescence yield (F' m) with the commonly used single rectangular flash (RF) approach potentially underestimates F' m and electron transport rate (J). A recent study suggests that the multi-phase flash (MPF) approach can provide more accurate estimations of F' m and J. This indicates that using the RF appr...
There is increasing interest in evaluating the environmental effects on crop architectural traits and yield improvement. However, crop models describing the dynamic changes in canopy structure with environmental conditions and the complex interactions between canopy structure, light interception, and dry mass production are only gradually emerging....
Plant physiologists are searching for the limitations of leaf and canopy photosynthesis in order to find a way to maximize the biomass production and resource use efficiency. Based on the Farquhar, von Caemmerer & Berry model of photosynthesis (FvCB model, Fahrquhar et al., 1980), Grassi and Magnani (2005) developed the quantitative limitation anal...
We identified that in a two meter high greenhouse grown cucumber canopy, photosynthesis is mostly light-limited, and light interception and biochemical capacity are the major factors limiting photosynthesis. The diffusion pathways, stomatal and mesophyll conductance, are minor restrictions.
Highlights: A dynamic cucumber FSPM, describing the effects of salinity on the plant morphology and the pattern of sodium accumulation in leaves, is parameterized and evaluated. This model is a first step in exploring mechanisms which improve plant tolerance and WUE at canopy level under salinity stress.
Architectural models describe plant architecture in silico. They can be either static or dynamic and can represent the morphology of plants at various levels of detail - often resulting in a realistic visualization, which is per se of great power. However, one of the main scientific goals pursued with architectural modeling in applied plant science...
Photosynthesis is limited by CO2 if chloroplastic CO2 concentration (Cc) is lower than the intersection point (Cctr) in the Farquhar-von Caemmerer-Berry (FvCB) model. This range is defined as light-saturated conditions. If Cc > Cctr, photosynthesis is limited mainly by light (non-light-saturated conditions). Therefore, the relationship between Cc a...
Questions
Questions (2)
The next conference of functional-structural plant model (FSPM2020) will be held in Oct. 2020 in Hannover.
website: https://www.fspm2020.net/
There is a whole session for root FSPM. It will be great to have you in the conference. As one of the organizer, I am interested in how many people from this project would like to come? Does anyone from this project would wish us to organize something special during the conference (e.g. satellite events, time for workshop, open discussion or software demonstration)?
Hope to see you all in Hannover (and your abstract within one month ^^)
Tsu-Wei
Does any one know when the registration will be open???
