Physiological and Genomic Basis of Mechanical-Functional Trade-Off in Plant Vasculature

Sengupta, Sonali; Majumder, Arun Lahiri

doi:10.1201/9781315365084-5

Cited by 3 publications

(3 citation statements)

References 126 publications

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“…A correlation between drought and frost resistance has been observed previously and could possibly be explained, for example, by resistance to xylem embolism (Lens et al . ; Sengupta & Majumder ). Accordingly, recent common garden experiments also found that foliage cold hardiness differs between populations of Pinus nigra (Kreyling et al .…”

Section: Discussionmentioning

confidence: 99%

Evidence of divergent selection for drought and cold tolerance at landscape and local scales in Abies alba Mill. in the French Mediterranean Alps

et al. 2016

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Understanding local adaptation in forest trees is currently a key research and societal priority. Geographically and ecologically marginal populations provide ideal case studies, because environmental stress along with reduced gene flow can facilitate the establishment of locally adapted populations. We sampled European silver fir (Abies alba Mill.) trees in the French Mediterranean Alps, along the margin of its distribution range, from pairs of high- and low-elevation plots on four different mountains situated along a 170-km east-west transect. The analysis of 267 SNP loci from 175 candidate genes suggested a neutral pattern of east-west isolation by distance among mountain sites. F(ST) outlier tests revealed 16 SNPs that showed patterns of divergent selection. Plot climate was characterized using both in situ measurements and gridded data that revealed marked differences between and within mountains with different trends depending on the season. Association between allelic frequencies and bioclimatic variables revealed eight genes that contained candidate SNPs, of which two were also detected using F(ST) outlier methods. All SNPs were associated with winter drought, and one of them showed strong evidence of selection with respect to elevation. Q(ST)-F(ST) tests for fitness-related traits measured in a common garden suggested adaptive divergence for the date of bud flush and for growth rate. Overall, our results suggest a complex adaptive picture for A. alba in the southern French Alps where, during the east-to-west Holocene recolonization, locally advantageous genetic variants established at both the landscape and local scales.

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Section: Discussionmentioning

confidence: 99%

Evidence of divergent selection for drought and cold tolerance at landscape and local scales in Abies alba Mill. in the French Mediterranean Alps

et al. 2016

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“…This knowledge gap is due to the fact that many studies are conducted at a physiological level only, without relating the genomic basis for xylem structure and function within and across species (Cobb et al . ; Sengupta & Majumder ).…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

A synthesis of the effects of atmospheric carbon dioxide enrichment on plant hydraulics: implications for whole‐plant water use efficiency and resistance to drought

Domec

Smith

McCulloh

2016

Plant Cell & Environment

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Here, we summarize studies on the effects of elevated [CO ] (CO ) on the structure and function of plant hydraulic architecture and explore the implications of those changes using a model. Changes in conduit diameter and hydraulic conductance due to CO vary among species. Ring-porous species tend towards an increase in conduit size and consequently conductivity. The effect in diffuse-porous species is much more limited. In conifers, the results are mixed, some species show minor changes in xylem structure, while other studies found increases in tracheid density and diameter. Non-woody plants generally exhibited the reverse pattern with narrower conduits and lower hydraulic conductivity under CO . Further, changes in drought-resistance traits suggest that non-woody plants were the most affected by CO , which may permit them to better resist drought-induced embolism under future conditions. Due to their complexity, acclimation in hydraulic traits in response to CO is difficult to interpret when relying solely on measurements. When we examined how the observed tissues-specific trends might alter plant function, our modelling results suggest that these hydraulic changes would lead to reduced conductance and more frequent drought stress in trees that develop under CO with a more pronounced effect in isohydric than in anisohydric species.

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“…The focus may be on one species in several sites or treatments, or numerous species or genotypes in common gardens (Wagner et al ., ; Rosner et al ., ). Increasingly, there will be opportunities to use study material that is generated from genetic modification affecting developmental pathways, anatomy, or stature (Voelker et al ., ,b; Elias et al ., ; Sengupta & Majumder, ), and offering trait combinations in a constant background that have not been available before.…”

Section: Studying Dual Functionality In Plants: Some Conceptual Appromentioning

confidence: 99%

Traits, properties, and performance: how woody plants combine hydraulic and mechanical functions in a cell, tissue, or whole plant

2014

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747I.747II.749III.753IV.760760References760 Summary This review presents a framework for evaluating how cells, tissues, organs, and whole plants perform both hydraulic and mechanical functions. The morphological alterations that affect dual functionality are varied: individual cells can have altered morphology; tissues can have altered partitioning to functions or altered cell alignment; and organs and whole plants can differ in their allocation to different tissues, or in the geometric distribution of the tissues they have. A hierarchical model emphasizes that morphological traits influence the hydraulic or mechanical properties; the properties, combined with the plant unit's environment, then influence the performance of that plant unit. As a special case, we discuss the mechanisms by which the proxy property wood density has strong correlations to performance but without direct causality. Traits and properties influence multiple aspects of performance, and there can be mutual compensations such that similar performance occurs. This compensation emphasizes that natural selection acts on, and a plant's viability is determined by, its performance, rather than its contributing traits and properties. Continued research on the relationships among traits, and on their effects on multiple aspects of performance, will help us better predict, manage, and select plant material for success under multiple stresses in the future.

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Physiological and Genomic Basis of Mechanical-Functional Trade-Off in Plant Vasculature

Cited by 3 publications

References 126 publications

Evidence of divergent selection for drought and cold tolerance at landscape and local scales in Abies alba Mill. in the French Mediterranean Alps

Evidence of divergent selection for drought and cold tolerance at landscape and local scales in Abies alba Mill. in the French Mediterranean Alps

A synthesis of the effects of atmospheric carbon dioxide enrichment on plant hydraulics: implications for whole‐plant water use efficiency and resistance to drought

Traits, properties, and performance: how woody plants combine hydraulic and mechanical functions in a cell, tissue, or whole plant

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