ORCID Profile
0000-0002-2489-3646
Current Organisation
Lancaster University
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Publisher: Wiley
Date: 04-07-2016
DOI: 10.1111/NPH.14063
Abstract: In C 4 photosynthesis CO 2 assimilation and reduction are typically coordinated across mesophyll (M) and bundle sheath ( BS ) cells, respectively. This system consequently requires sufficient light to reach BS to generate enough ATP to allow ribulose‐1,5‐bisphosphate (Ru BP ) regeneration in BS . Leaf anatomy influences BS light penetration and therefore constrains C 4 cycle functionality. Using an absorption scattering model (coded in Excel, and freely downloadable) we simulate light penetration profiles and rates of ATP production in BS across the C 3 , C 3 –C 4 and C 4 anatomical continua. We present a trade‐off for light absorption between BS pigment concentration and space allocation. C 3 BS anatomy limits light absorption and benefits little from high pigment concentrations. Unpigmented BS extensions increase BS light penetration. C 4 and C 3 –C 4 anatomies have the potential to generate sufficient ATP in the BS , whereas typical C 3 anatomy does not, except some C 3 taxa closely related to C 4 groups. Insufficient volume of BS , relative to M, will h er a C 4 cycle via insufficient BS light absorption. Thus, BS ATP production and Ru BP regeneration, coupled with increased BS investments, allow greater operational plasticity. We propose that larger BS in C 3 lineages may be co–opted for C 3 –C 4 and C 4 biochemistry requirements.
Publisher: Springer Science and Business Media LLC
Date: 27-06-2019
DOI: 10.1038/S41467-019-10826-5
Abstract: The formation of stomata and leaf mesophyll airspace must be coordinated to establish an efficient and robust network that facilitates gas exchange for photosynthesis, however the mechanism by which this coordinated development occurs remains unclear. Here, we combine microCT and gas exchange analyses with measures of stomatal size and patterning in a range of wild, domesticated and transgenic lines of wheat and Arabidopsis to show that mesophyll airspace formation is linked to stomatal function in both monocots and eudicots. Our results support the hypothesis that gas flux via stomatal pores influences the degree and spatial patterning of mesophyll airspace formation, and indicate that this relationship has been selected for during the evolution of modern wheat. We propose that the coordination of stomata and mesophyll airspace pattern underpins water use efficiency in crops, providing a target for future improvement.
Publisher: Elsevier BV
Date: 03-2021
Publisher: Elsevier BV
Date: 11-2016
Publisher: Informa UK Limited
Date: 02-10-2017
Location: United Kingdom of Great Britain and Northern Ireland
Location: United States of America
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Marjorie Lundgren.