Improving water transport for carbon gain in crops

Brodribb, Timothy J.; Holloway‐Phillips, Meisha; Bramley, Helen

doi:10.1016/b978-0-12-417104-6.00011-x

Cited by 8 publications

(8 citation statements)

References 193 publications

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“…A high positive correlation between maximal stomatal conductance and grain yield under both wet and dry conditions suggests that, at least under the soil and climate of the study site and across the hybrids examined here, the maintenance of stomatal conductance throughout the day appears to be required for supporting daily net biomass accumulation. This result is supported by previous efforts to understand whole-plant functioning in crops, as well as wild species: water transport (~K leaf ) to the stomata (g S ) drives gas-exchange (~A N ), and therefore, improved growth and yield (Blum 2009;Brodribb et al 2015;Gleason et al 2017aGleason et al , 2019Xiong & Nadal 2020).…”

Section: Resultssupporting

confidence: 69%

“…Crop improvement could likely be facilitated by considering multiple physiological traits together, as well as the connections between these traits and how these connections shift under different soil and climate scenarios (Gleason et al 2019). Although the idea that selection for multiple traits might result in better outcomes has been suggested previously (Campos et al 2004; Condon 2020), what is becoming more evident is the need to include linkages connecting soil water, its transport to (near) the stomata, and the photochemistry that depends on water and CO 2 supply (Brodribb et al 2015; Gleason et al 2017a; Turner et al 2014). Several physiological traits have been found to affect crop performance when studied in isolation of one another.…”

Section: Introductionmentioning

confidence: 99%

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Growth and grain yield of eight maize hybrids are aligned with water transport, stomatal conductance, and photosynthesis in a semi‐arid irrigated system

Gleason

Nalezny

Hunter

et al. 2021

Physiologia Plantarum

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There is increasing interest in understanding how trait networks can be manipulated to improve the performance of crop species. Working towards this goal, we have identified key traits linking the acquisition of water, the transport of water to the sites of evaporation and photosynthesis, stomatal conductance, and growth across eight maize hybrid lines grown under well-watered and water-limiting conditions in Northern Colorado. Under well-watered conditions, hybrids with higher end-ofseason growth and grain yield exhibited higher leaf-specific conductance, lower operating water potentials, higher rates of midday stomatal conductance, higher rates of net CO 2 assimilation, and greater leaf osmotic adjustment. This trait network was similar under water-limited conditions with the notable exception that linkages between water transport, midday stomatal conductance, and growth were even stronger than under fully watered conditions. The maintenance of high leaf-specific conductance throughout the day was achieved via higher maximal conductance rates rather than lower susceptibility to conductance loss. Our results suggest that efforts to improve maize performance in well-watered and water-limiting conditions would benefit from considering the physiological trait networks governing water and carbon flux rather than focusing on single traits independently of one another.

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Section: Resultssupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Growth and grain yield of eight maize hybrids are aligned with water transport, stomatal conductance, and photosynthesis in a semi‐arid irrigated system

Gleason

Nalezny

Hunter

et al. 2021

Physiologia Plantarum

View full text Add to dashboard Cite

show abstract

“…High positive correlation between maximal stomatal conductance and grain yield under both wet and dry conditions suggests that, at least under the soil and climate of the study site and across the hybrids examined here, the maintenance of stomatal conductance throughout the day appears to be required for supporting daily net biomass accumulation. This result is supported by previous efforts to understand whole-plant functioning in crops, as well as wild species, in that water transport (~K leaf ) to the stomata ( g S ) drives gas-exchange (~A N ), and therefore, improved growth and yield (Blum 2009; Brodribb et al 2015; Gleason et al 2017a, 2019; Xiong and Nadal 2020).…”

Section: Discussionsupporting

confidence: 65%

“…Crop improvement could likely be facilitated by considering multiple physiological traits together, as well as the connections between these traits and how these connections shift under different soil and climate scenarios (Gleason et al 2019). Although the idea that selection for multiple traits might result in better outcomes has been suggested previously (Campos et al 2004; Condon 2020), what is becoming more clear is the need to include linkages connecting soil water, its transport to (near) the stomata, and the photochemistry that these processes support (Turner et al 2014; Brodribb et al 2015; Gleason et al 2017a). Several physiological traits have been found to affect crop performance when studied in isolation of one another.…”

Section: Introductionmentioning

confidence: 99%

“…Xylem-specific conductivity, as well as the susceptibility of the xylem to failure, have recently been reported as important traits conferring drought resistance in monocotyledon crop species (Guha et al 2018; Wang et al 2018; Gleason et al 2019). A such, it has also been suggested that efforts to improve crop performance in drought-prone environments might benefit by explicitly considering xylem traits and water transport between the soil and leaf (Brodribb et al 2015; Gleason 2015).…”

Section: Introductionmentioning

confidence: 99%

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Growth and grain yield of eight maize hybrids is aligned with water transport, stomatal conductance, and photosynthesis in a semi-arid irrigated system

Gleason

Nalezny

Hunter

et al. 2021

Preprint

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There is increasing interest in understanding how trait networks can be manipulated to improve the performance of crop species. Working towards this goal, we have identified key traits linking the acquisition of water, the transport of water to the sites of evaporation and photosynthesis, stomatal conductance, and growth across eight maize hybrid lines grown under well-watered and water-limiting conditions in Northern Colorado. Under well-watered conditions, well-performing hybrids exhibited high leaf-specific conductance, low operating water potentials, high rates of midday stomatal conductance, high rates of net CO2 assimilation, greater leaf osmotic adjustment, and higher end-of-season growth and grain yield. This trait network was similar under water-limited conditions with the notable exception that linkages between water transport, midday stomatal conductance, and growth were even stronger than under fully-watered conditions. The results of this experiment suggest that similar trait networks might confer improved performance under contrasting climate and soil conditions, and that efforts to improve the performance of crop species could possibly benefit by considering the water transport pathway within leaves, as well as within the whole-xylem, in addition to root-level and leaf-level traits.

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Experimental and conceptual approaches to root water transport

et al. 2022

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Background Root water transport, which critically contributes to the plant water status and thereby plant productivity, has been the object of extensive experimental and theoretical studies. However, root systems represent an intricate assembly of cells in complex architectures, including many tissues at distinct developmental stages. Our comprehension of where and how molecular actors integrate their function in order to provide the root with its hydraulic properties is therefore still limited. Scope Based on current literature and prospective discussions, this review addresses how root water transport can be experimentally measured, what is known about the underlying molecular actors, and how elementary water transport processes are scaled up in numerical/mathematical models. Conclusions The theoretical framework and experimental procedures on root water transport that are in use today have been established a few decades ago. However, recent years have seen the appearance of new techniques and models with enhanced resolution, down to a portion of root or to the tissue level. These advances pave the way for a better comprehension of the dynamics of water uptake by roots in the soil.

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Improving water transport for carbon gain in crops

Cited by 8 publications

References 193 publications

Growth and grain yield of eight maize hybrids are aligned with water transport, stomatal conductance, and photosynthesis in a semi‐arid irrigated system

Growth and grain yield of eight maize hybrids are aligned with water transport, stomatal conductance, and photosynthesis in a semi‐arid irrigated system

Growth and grain yield of eight maize hybrids is aligned with water transport, stomatal conductance, and photosynthesis in a semi-arid irrigated system

Experimental and conceptual approaches to root water transport

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