Variation between rice accessions in photosynthetic induction in flag leaves and underlying mechanisms

Acevedo‐Siaca, Liana G.; Coe, Robert A.; Quick, W. Paul; Long, Stephen P.

doi:10.1093/jxb/eraa520

Cited by 47 publications

(51 citation statements)

References 50 publications

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“…In rice, it might not be as clearly defined (De Souza et al, 2020 ; Soleh et al, 2016 ). Previously, it was shown that photosynthetic induction in rice is heavily limited by stomata (Yamori et al, 2020 ) as well as biochemistry (Acevedo‐Siaca, Coe, Quick, et al, 2020 ; Acevedo‐Siaca, Coe, Wang, et al, 2020 ). Indeed, previous work has shown that QTLs that increase stomatal conductance in rice can increase the initial slope of CO 2 assimilation during induction (Adachi et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

“…For example, there is evidence that stomatal opening and closing can vary by rice subpopulation (Qu et al, 2016 ), with japonica accessions having an overall slower stomatal response. Additionally, none of the accessions utilized in these independent photosynthetic induction studies have overlapped (Acevedo‐Siaca et al, 2020b ; Acevedo‐Siaca, Coe, Wang, et al, 2020 ; Adachi et al, 2019 ; Yamori et al, 2020 ). Furthermore, the release date for the accessions utilized in different induction studies in rice vary greatly (Acevedo‐Siaca et al, 2020a , 2020b ; Yamori et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, none of the accessions utilized in these independent photosynthetic induction studies have overlapped (Acevedo‐Siaca et al, 2020b ; Acevedo‐Siaca, Coe, Wang, et al, 2020 ; Adachi et al, 2019 ; Yamori et al, 2020 ). Furthermore, the release date for the accessions utilized in different induction studies in rice vary greatly (Acevedo‐Siaca et al, 2020a , 2020b ; Yamori et al, 2020 ). Currently, it has not been examined how cultivar release date affects photosynthetic induction response.…”

Section: Discussionmentioning

confidence: 99%

“…A was corrected to remove stomatal limitation ( A * ) following the methods of Soleh et al, (2016) and Acevedo‐Siaca, Coe, Wang, et al, (2020). Where the intercellular CO 2 concentration was determined from the values once a steady‐state was reached:

A^{*} = A \times \frac{300}{C_{i}}

…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, previous models that utilize steady‐state data potentially overestimate CO 2 assimilation and do not account for the loss of productivity due to the lags in efficiency during induction and relaxation (Pearcy, 1990 ; Taylor & Long, 2017 ; Wang, Burgess, et al, 2020 ) and will underestimate water loss (McAusland et al, 2016 ; Qu et al, 2016 ; McAusland et al, 2020 ). However, increased focus has recently been dedicated to characterizing, understanding, and modeling photosynthesis in non‐steady‐state conditions, to more accurately reflect conditions in the field (Kaiser et al, 2015 ; Kaiser et al, 2017 ; McAusland et al, 2016 ; Qu et al, 2016 ; Soleh et al, 2016 , 2017 ; Kaiser et al, 2018 ; Deans et al, 2019 ; Deans et al, 2019 ; De Souza et al, 2020 ; Wang, Burgess, et al, 2020 ; Acevedo‐Siaca, Coe, Quick, et al, 2020 ; Acevedo‐Siaca, Coe, Wang, et al, 2020 ; McAusland et al, 2020 ). As a result, new targets for improving photosynthetic efficiency have been identified that could improve performance in non‐steady‐state conditions, such as increasing the speed of induction, reducing forgone assimilation during induction, reducing water loss, improving stomatal kinetics, or relaxing NPQ more quickly (Woodrow & Mott, 1989 ; Lawson & Blatt, 2014 ; McAusland et al, 2016 ; Kromdijk et al, 2016 ; Glowacka et al, 2018 ; Qu et al, 2016 ; De Souza et al, 2020 ; Acevedo‐Siaca, Coe, Quick, et al, 2020 ; Acevedo‐Siaca, Coe, Wang, et al, 2020 ; McAusland et al, 2020 ; Qu et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of photosynthetic induction and relaxation within the canopy of rice and two wild relatives

Acevedo‐Siaca

Dionora

Laza

et al. 2021

Food and Energy Security

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Wild rice species are a source of genetic material for improving cultivated rice (Oryza sativa) and a means to understand its evolutionary history. Renewed interest in non‐steady‐state photosynthesis in crops has taken place due its potential in improving sustainable productivity. Variation was characterized for photosynthetic induction and relaxation at two leaf canopy levels in three rice species. The wild rice accessions had 16%–40% higher rates of leaf CO2 uptake (A) during photosynthetic induction relative to the O. sativa accession. However, O. sativa had an overall higher photosynthetic capacity when compared to accessions of its wild progenitors. Additionally, O. sativa had a faster stomatal closing response, resulting in higher intrinsic water‐use efficiency during high‐to‐low light transitions. Leaf position in the canopy had a significant effect on non‐steady‐state photosynthesis, but not steady‐state photosynthesis. The results show potential to utilize wild material to refine plant models and improve non‐steady‐state photosynthesis in cultivated rice for increased productivity.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A^{*} = A \times \frac{300}{C_{i}}

…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamics of photosynthetic induction and relaxation within the canopy of rice and two wild relatives

Acevedo‐Siaca

Dionora

Laza

et al. 2021

Food and Energy Security

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Variation in the role of the flag‐leaf in reproductive effort of semiarid rangeland bunchgrasses

Hamerlynck,

Quigley,

O'Connor

2024

Ecosphere

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Understanding the mechanisms underlying viable seed production of perennial bunchgrasses is critical to improving restoration and conservation success in Great Basin sagebrush steppe rangelands. We studied the effects of pre‐ and post‐anthesis flag‐leaf removal and post‐anthesis seed‐head shading on reproductive effort in two important rangeland restoration species, the exotic crested wheatgrass (Agropyron cristatum) and native squirreltail (Elymus elymoides). Flag‐leaf removal had distinct, species‐specific effects on seed filling. Pre‐anthesis flag‐leaf removal in crested wheatgrass reduced the proportion of filled seeds, while post‐anthesis removal did not. In contrast, squirreltail increased filled seed proportions regardless of flag‐leaf removal timing. Neither flag‐leaf removal treatment affected seed quality, as quantified by seed‐specific mass (in grams per square meter), which significantly reduced with seed‐head shading in both species. Seed‐head shading reduced total propagule production (unfilled + filled seeds) in crested wheatgrass but increased it in squirreltail, possibly due to our shading method protecting from seed‐head herbivory or high‐light stress. Flag‐leaf removal in the squirreltail also induced a negative shading effect on filled seed area, mass, and specific mass. These findings suggest flag leaves can modulate reproductive effort outside of seed provisioning, either by maintaining pre‐fertilized seed viability, as in crested wheatgrass, or acting as a competitive sink to the fully emerged seed‐head, as in squirreltail. Moreover, this study demonstrates photosynthetic activity by the seed‐head itself is critical to the expression of seed quality traits important to seedling establishment success of semiarid perennial bunchgrasses.

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Improving C₃ photosynthesis by exploiting natural genetic variation: Hirschfeldia incana as a model species

Taylor

Garassino

Aarts

et al. 2022

Food and Energy Security

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Despite research efforts toward improving crop photosynthetic energy conversion efficiencies over the past 40 years, photosynthetic efficiencies remain far from their theoretical maxima. A major challenge has been that plant photosynthesis is a complex process, controlled by many underlying genetic factors and highly dynamic in response to short‐term environmental changes. Recent approaches to improving photosynthesis involved model‐based identification of the bottlenecks in photosynthesis followed by their genetic modification (GM). While these approaches were successful and inspirational, their dependency on the use of GM techniques may restrict their implementation in some jurisdictions. We therefore suggest greater research focus on a different, yet complementary, approach to improving photosynthetic efficiency: the exploration and exploitation of natural genetic variation in photosynthesis. A substantial improvement in phenotyping and genotyping technology over the past decade has highlighted natural variation in photosynthetic sub‐traits for crop and model species. However, a comprehensive understanding of all the factors responsible for photosynthetic limitations is still lacking. We therefore propose the use of high photosynthetic capacity species as models for the exploration of the physiological and genetic basis of high photosynthetic efficiency. While most high photosynthetic capacity species are not suitable as models due to complex genetics and evolutionary distance from crops, we have identified Brassicaceae species Hirschfeldia incana (L.) Lagr.‐Foss as a promising candidate. In this perspective paper, we describe and advocate the use of H. incana as a model for the exploration of high maximum CO2 assimilation rates (Pmax) found in some C3 species. We describe the basic biology and evolutionary history of the species and report preliminary data on its photosynthetic characteristics. Our findings suggest H. incana is an excellent model species for studies aiming at understanding natural genetic variation in photosynthetic efficiency.

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Variation between rice accessions in photosynthetic induction in flag leaves and underlying mechanisms

Cited by 47 publications

References 50 publications

Dynamics of photosynthetic induction and relaxation within the canopy of rice and two wild relatives

Dynamics of photosynthetic induction and relaxation within the canopy of rice and two wild relatives

Variation in the role of the flag‐leaf in reproductive effort of semiarid rangeland bunchgrasses

Improving C₃ photosynthesis by exploiting natural genetic variation: Hirschfeldia incana as a model species

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Variation between rice accessions in photosynthetic induction in flag leaves and underlying mechanisms

Cited by 47 publications

References 50 publications

Dynamics of photosynthetic induction and relaxation within the canopy of rice and two wild relatives

Dynamics of photosynthetic induction and relaxation within the canopy of rice and two wild relatives

Variation in the role of the flag‐leaf in reproductive effort of semiarid rangeland bunchgrasses

Improving C3 photosynthesis by exploiting natural genetic variation: Hirschfeldia incana as a model species

Contact Info

Product

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Improving C₃ photosynthesis by exploiting natural genetic variation: Hirschfeldia incana as a model species