Linking water relations and hydraulics with photosynthesis

Xiong, Dongliang; Nadal, Miquel

doi:10.1111/tpj.14595

Cited by 109 publications

(106 citation statements)

References 146 publications

(312 reference statements)

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“…If there exists an adaptive trade-off relation between hydraulic efficiency and cavitation resistance among Pinaceae species ( Choat et al , 2011 ; Gleason et al , 2016 ; Maherali et al , 2004 ), it means photosynthesis could have a negative association with cavitation resistance among the non-threatened species globally. As expected by either the carbon economy theory ( Augusto et al ., 2014 ) or k l – P n coordination ( Brodribb et al , 2002 ; Scoffoni et al , 2016 ; Xiong et al , 2019 ), the PGLS output of the 13 species did support the P 50 – P n trade-off ( Fig. 5A , P = 0.02), which was consistent with some other studies on gymnosperm species ( Maherali et al , 2006 ; Pittermann et al ., 2012 ; Sterck et al ., 2012 ).…”

Section: Discussionsupporting

confidence: 91%

“…It has been demonstrated that the hydraulic efficiency of branch has a tight association with leaf photosynthetic capacity ( Brodribb et al , 2002 ; Scoffoni et al , 2016 ; Xiong et al , 2019 ). If there exists an adaptive trade-off relation between hydraulic efficiency and cavitation resistance among Pinaceae species ( Choat et al , 2011 ; Gleason et al , 2016 ; Maherali et al , 2004 ), it means photosynthesis could have a negative association with cavitation resistance among the non-threatened species globally.…”

Section: Discussionmentioning

confidence: 99%

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Does Cathaya argyrophylla, an ancient and threatened Pinaceae species endemic to China, show eco-physiological outliers to its Pinaceae relatives?

Fan

Wang

Zhang

et al. 2020

Conservation Physiology

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Cathaya argyrophylla is an ancient and threatened Pinaceae species endemic to China, but its eco-physiological traits are rarely reported. We hypothesized that Cathaya showed eco-physiological outliers to its Pinaceae relatives, which lead to its current endangered status. Here we collected the photosynthetic capacity (Pn, maximum photosynthesis rate) and branchlet hydraulic safety (P50, the water potential at which a 50% loss in conductivity occurs) of Pinaceae species globally, including our measurements on Cathaya. We applied the phylogenetic comparative methods to investigate: (i) the phylogenetic signal of the two key traits across Pinaceae species, and (ii) the trait–climate relationships and the photosynthesis–cavitation resistance relationship across Pinaceae species. We applied the polygenetic quantile regression (PQR) method to assess whether Cathaya showed eco-physiological outliers to its Pinaceae relatives in terms of cavitation resistance and photosynthetic capacity. It was found that P50, and to a less extent, Pn, had a strong phylogenetic signal consistent with niche conservation among Pinaceae species. Hydraulic safety largely determined non-threatened Pinaceae species’ distribution across moisture gradients at the global scale. There was also an adaptive trade-off relationship between Pn and P50. Cathaya is a high cavitation resistant, low photosynthetic capacity species. It showed eco-physiological outliers to its Pinaceae relatives because it had lower P50 and Pn below the 10% quantile boundaries along moisture and/or temperature gradients; also, it was above the 90% quantile boundary of the Pn and P50 relationship across non-endangered Pinaceae species. The PQR output demonstrated that in the subtropical area of China characterized by abundant rainfall, Cathaya has extra high hydraulic safety, suggesting inefficiency of carbon economy associated with either competition or other life history strategies, which lead to its current endangered status.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Does Cathaya argyrophylla, an ancient and threatened Pinaceae species endemic to China, show eco-physiological outliers to its Pinaceae relatives?

Fan

Wang

Zhang

et al. 2020

Conservation Physiology

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show abstract

“…It is possible that non-vascular plants have not improved g m and thus photosynthesis, because to do so it would be necessary to implement other aspects such as for vascular systems, plant height, and stomatal regulation. Indeed there is evidenceat least from pteridophytes to angiospermsof positive scaling among A area , g m , leaf venation and hydraulic conductivity (Brodribb et al, 2007;Flexas et al, 2013b;Scoffoni et al, 2016;Xiong et al, 2017;Xiong and Nadal, 2019). Additionally, mosses of the genus Polytrichum, which have at least partially functional hydroids (i.e.…”

Section: Key Role Of Mesophyll Conductance and Other Physiological Trmentioning

confidence: 99%

Photosynthesis and photosynthetic efficiencies along the terrestrial plant’s phylogeny: lessons for improving crop photosynthesis

Flexas

Carriquí

2020

The Plant Journal

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Summary Photosynthesis is the basis of all life on Earth. Surprisingly, until very recently, data on photosynthesis, photosynthetic efficiencies, and photosynthesis limitations in terrestrial land plants other than spermatophytes were very scarce. Here we provide an updated data compilation showing that maximum photosynthesis rates (expressed either on an area or dry mass basis) progressively scale along the land plant’s phylogeny, from lowest values in bryophytes to largest in angiosperms. Unexpectedly, both photosynthetic water (WUE) and nitrogen (PNUE) use efficiencies also scale positively through the phylogeny, for which it has been commonly reported that these two efficiencies tend to trade‐off between them when comparing different genotypes or a single species subject to different environmental conditions. After providing experimental evidence that these observed trends are mostly due to an increased mesophyll conductance to CO2 – associated with specific anatomical changes – along the phylogeny, we discuss how these findings on a large phylogenetic scale can provide useful information to address potential photosynthetic improvements in crops in the near future.

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“…Maximum g s is therefore constrained by the plant’s hydraulic conductance, which is mainly related to leaf hydraulic conductance ( K leaf ) in most plants (Sack & Holbrook, 2006). Indeed, a tight correlation between K leaf and photosynthesis has been widely observed (Brodribb et al ., 2005, 2007; Nardini et al ., 2014; Xiong et al ., 2015b; Scoffoni et al ., 2016; Xiong & Nadal, 2020). K leaf is largely determined by leaf vein density because an increased amount of veins brings xylem tissues specialized for water transport closer to the evaporation sites inside the leaf (Brodribb et al ., 2007; Buckley et al ., 2015).…”

Section: Introductionmentioning

confidence: 99%

From one side to two sides: the effects of stomatal distribution on photosynthesis

Xiong

Flexas

2020

New Phytologist

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The functions of stomata have been studied for a long time; however, a clear understanding of the influences of stomatal distribution on photosynthesis, especially the CO 2 diffusion, is still unclear. Here, we investigated the stomatal morphology, distribution on leaf surfaces, vein traits and gas exchange parameters of 61 species, of which 29 were amphistomatous, spanning 32 families. Photosynthesis (A) was tightly coupled with operational stomatal conductance (g s) and mesophyll conductance (g m) regardless of whether phylogenetic relationships were accounted for. Although the enhancement of g s from ferns and gymnosperms to angiosperms could largely be explained by the increase in leaf vein density (VLA) and stomatal density (SD), the g s was decoupled from VLA and SD across angiosperm species. Instead, A in angiosperms was further influenced by the allocation of stomatal pores on leaf surfaces, which dramatically increased g s and g m. Moreover, the ratio of g s to anatomically based maximum g s was, on average, 0.12 across species. Our results show that the shift of stomatal pores from one leaf side to both sides played an important role in regulating CO 2 diffusion via both stomata and mesophyll tissues. Modifications of stomata distribution have potential as a functional trait for photosynthesis improvement.

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Linking water relations and hydraulics with photosynthesis

Cited by 109 publications

References 146 publications

Does Cathaya argyrophylla, an ancient and threatened Pinaceae species endemic to China, show eco-physiological outliers to its Pinaceae relatives?

Does Cathaya argyrophylla, an ancient and threatened Pinaceae species endemic to China, show eco-physiological outliers to its Pinaceae relatives?

Photosynthesis and photosynthetic efficiencies along the terrestrial plant’s phylogeny: lessons for improving crop photosynthesis

From one side to two sides: the effects of stomatal distribution on photosynthesis

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