Improving Photosynthetic Metabolism for Crop Yields: What Is Going to Work?

Paul, Matthew J.

doi:10.3389/fpls.2021.743862

Cited by 20 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The predominant view up to two decades ago was that photosynthetic efficiency had reached its maximum capacity and could not be further improved in crops due to sink limitations, and the subject still sparks scientific debate (discussed in Long et al, 2006;Sinclair et al, 2019;Araus et al, 2021;Paul, 2021). However, studies simulating possible future increases in atmospheric carbon dioxide (CO 2 ) concentrations have clearly indicated that photosynthesis can indeed be enhanced and result in improved crop yields (Ainsworth and Long, 2021), which has been further established over the years (Zhu et al, 2010;Parry et al, 2011;Gu et al, 2014;Long et al, 2015;Ort et al, 2015;Yin et al, 2015Yin et al, , 2021aYin et al, , 2021bSimkin et al, 2019;Wu et al, 2019).…”

Section: Introduction-why Do We Need Crops With Increased Yields?mentioning

confidence: 99%

Here comes the sun: How optimization of photosynthetic light reactions can boost crop yields

Walter

Kromdijk

2022

JIPB

View full text Add to dashboard Cite

show abstract

Section: Introduction-why Do We Need Crops With Increased Yields?mentioning

confidence: 99%

Here comes the sun: How optimization of photosynthetic light reactions can boost crop yields

Walter

Kromdijk

2022

JIPB

View full text Add to dashboard Cite

show abstract

“…Indeed, there has yet to be shown a direct cause-effect relationship between photosynthesis and yield (Liliane & Charles, 2020). Photosynthesis is a well-studied process with models of the limitations in the photosynthetic pathway (Paul, 2021). A substantial effort has been made during the last few years to improve the efficiency of photosynthesis, with the justification that due to the plateauing of main crop yields, crop production gains must be quick and big (Swift et al, 2019).…”

Section: Photosynthesis and Crop Productivitymentioning

confidence: 99%

“…Crop yield is a result of an entire system. So, photosynthesis provides the carbon and energy that the entire system relies on, but this interaction is not linear and is influenced by several factors such as development, leaf and canopy structure and architecture, source-sink relationship, and how photosynthesis is affected within a field crop (Paul, 2021). Furthermore, the outdoor environment, which differs greatly from the laboratory or greenhouse, has a strong influence on photosynthesis and growth (Flore, 2011).…”

Section: Photosynthesis and Crop Productivitymentioning

confidence: 99%

“…Rubisco's oxygenase activity competes with CO 2 fixation at the active site (see Fig. 1), thus oxygen is added to RuBP instead of CO 2 , resulting in the synthesis of a molecule of 3-phosphoglycerate (3PGA) and a molecule of 2-phosphoglycolate (2PG) at the cost of one ATP and one NAD(P)H (Paul, 2021). 2PG is recycled into 3PGA in the photorespiratory pathway, which occurs in three organelles (chloroplast, peroxisome, and mitochondria) as well as the cytosol.…”

Section: Decreasing Photorespirationmentioning

confidence: 99%

“…This is the only way to achieve a significant increase in biomass output to maintain the necessary yield enhancement. This is an ambitious undertaking but the underlying science is compelling and is attracting more attention (Lappe et al, 2018;Paul, 2021). Initially, rice genes encoding C4 enzymes such as PEPC, pyruvate orthophosphate dikinase (PPDK), and NADP-malic enzyme (NADP-ME) were used to alter rice (Ermakova et al, 2021).…”

Section: Transforming C3 Crops Into C4mentioning

confidence: 99%

See 2 more Smart Citations

Optimization of photosynthesis for sustainable crop production

Muhie

2022

CABI Agric Biosci

View full text Add to dashboard Cite

Crop production will need to increase by about 60% to satisfy the demand of food for the fast-growing population globally. A number of recent studies have provided strong support demonstrating that improving the photosynthetic efficiency via different systems can provide an avenue to improve yield potential of crops. Photosynthesis a regulated system that drives biological processes including crop yields. Hence, this review focuses on improvement of the efficiency of photosynthesis via different mechanisms; decreasing photorespiration, transforming C3 crops to C4 pathway, optimization of Calvin Benson cycle / Rubisco, and electron transport. Further work should be done on transgenic crops with modified photosynthesis. Optimization of the activity of Rubisco may not be successful in some moisture stress areas, and consideration of photoprotection could offer some advantages. Optimization of source-sink relationship would represent another promising way to improve crop yield. A strong sink can increase crop yield even under stress conditions.

show abstract

Analysis of durum wheat photosynthetic organs during grain filling reveals the ear as a water stress-tolerant organ and the peduncle as the largest pool of primary metabolites

Martínez-Peña

Vergara-Díaz

Schlereth

et al. 2023

Planta

View full text Add to dashboard Cite

Main conclusion The pool of carbon- and nitrogen-rich metabolites is quantitatively relevant in non-foliar photosynthetic organs during grain filling, which have a better response to water limitation than flag leaves. Abstract The response of durum wheat to contrasting water regimes has been extensively studied at leaf and agronomic level in previous studies, but the water stress effects on source–sink dynamics, particularly non-foliar photosynthetic organs, is more limited. Our study aims to investigate the response of different photosynthetic organs to water stress and to quantify the pool of carbon and nitrogen metabolites available for grain filling. Five durum wheat varieties were grown in field trials in the Spanish region of Castile and León under irrigated and rainfed conditions. Water stress led to a significant decrease in yield, biomass, and carbon and nitrogen assimilation, improved water use efficiency, and modified grain quality traits in the five varieties. The pool of carbon (glucose, glucose-6-phosphate, fructose, sucrose, starch, and malate) and nitrogen (glutamate, amino acids, proteins and chlorophylls) metabolites in leaf blades and sheaths, peduncles, awns, glumes and lemmas were also analysed. The results showed that the metabolism of the blades and peduncles was the most susceptible to water stress, while ear metabolism showed higher stability, particularly at mid-grain filling. Interestingly, the total metabolite content per organ highlighted that a large source of nutrients, which may be directly involved in grain filling, are found outside the blades, with the peduncles being quantitatively the most relevant. We conclude that yield improvements in our Mediterranean agro-ecosystem are highly linked to the success of shoots in producing ears and a higher number of grains, while grain filling is highly dependent on the capacity of non-foliar organs to fix CO2 and N. The ear organs show higher stress resilience than other organs, which deserves our attention in future breeding programmes.

show abstract

Improving Photosynthetic Metabolism for Crop Yields: What Is Going to Work?

Cited by 20 publications

References 20 publications

Here comes the sun: How optimization of photosynthetic light reactions can boost crop yields

Here comes the sun: How optimization of photosynthetic light reactions can boost crop yields

Optimization of photosynthesis for sustainable crop production

Analysis of durum wheat photosynthetic organs during grain filling reveals the ear as a water stress-tolerant organ and the peduncle as the largest pool of primary metabolites

Contact Info

Product

Resources

About