Genomics-Based Systems and Multi-disciplinary Approaches to Unlock Complex Gene Networks Underlying Wood Formation

Piot, Anthony; El‐Kassaby, Yousry A.; Porth, Ilga

doi:10.1007/s40725-022-00162-1

Cited by 4 publications

(3 citation statements)

References 117 publications

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“…Over the past decade, transcriptomics has emerged as the mainstream approach for disentangling the molecular processes associated with wood formation and the stress response in trees ( Piot et al. 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Xylem cell size regulation is a key adaptive response to water deficit in Eucalyptus grandis

Keret,

Drew,

Hills

2024

Tree Physiology

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Future climatic scenarios forecast increasingly frequent droughts that will pose substantial consequences on tree mortality. In light of this, drought-tolerant eucalypts have been propagated, however, the severity of these conditions will invoke adaptive responses, impacting the commercially valuable wood properties. To determine what mechanisms govern the wood anatomical adaptive response, highly controlled drought experiments were conducted in E. grandis, with the tree physiology and transcriptome closely monitored. In response to water deficit, E. grandis displays an isohydric stomatal response to conserve water and enable stem growth to continue, albeit at a reduced rate. Maintaining gaseous exchange is likely a critical short-term response that drives the formation of hydraulically-safer xylem. For instance, the development of significantly smaller fibers and vessels was found to increase cellular density, thereby promoting drought tolerance through improved functional redundancy, as well as implosion and cavitation resistance. The transcriptome was explored to identify the molecular mechanisms responsible for controlling xylem cell size during prolonged water deficit. Downregulation of genes associated with cell wall remodelling and the biosynthesis of cellulose, hemicellulose, and pectin appeared to coincide with a reduction in cellular enlargement during drought. Furthermore, transcript levels of NAC and MYB transcription factors, vital for cell wall component biosynthesis, were reduced, while those linked to lignification increased. The upregulation of EgCAD and various peroxidases under water deficit did not correlate with an increased lignin composition. However, with the elevated cellular density, a higher lignin content per xylem cross-sectional area was observed, potentially enhancing hydraulic safety. These results support the requirement for higher density, drought-adapted wood as a long-term adaptive response in E. grandis, which is largely influenced by the isohydric stomatal response coupled with cellular expansion-related molecular processes.

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Section: Introductionmentioning

confidence: 99%

Xylem cell size regulation is a key adaptive response to water deficit in Eucalyptus grandis

Keret,

Drew,

Hills

2024

Tree Physiology

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“…The entropy S of χ(k) is calculated according to Eq (9). In the natural time domain, the defined entropy represents the dynamic entropy, capturing the system's dynamic…”

Section: Basic Definitionmentioning

confidence: 99%

“…In recent years, advanced non-destructive testing methods such as AE techniques are particularly suitable for fatigue damage monitoring, mainly because of their high sensitivity to inelastic material changes such as microcracks. Related studies [8][9][10] have shown that the internal structure of wood is complex, so the path of AE signal conduction in wood is very complicated, and the collected AE signal is characterized by non-smoothness, non-linearity and complexity. Aldahdooh MAA et al [11] classified the type of cracks (flexural or shear) in several types of four-point bending RC beams based on the fracture mechanism of the RC beams and the characterization of the AE signals, and the final results obtained were in agreement with the results of visual observations based on the crack patterns.…”

Section: Introductionmentioning

confidence: 99%

Analysis of critical states based on acoustic emission signals during progressive failure of wood

Jia,

LI,

Zhang

et al. 2024

PLoS ONE

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The analysis of critical states during fracture of wood materials is crucial for wood building safety monitoring, wood processing, etc. In this paper, beech and camphor pine are selected as the research objects, and the acoustic emission signals during the fracture process of the specimens are analyzed by three-point bending load experiments. On the one hand, the critical state interval of a complex acoustic emission signal system is determined by selecting characteristic parameters in the natural time domain. On the other hand, an improved method of b_value analysis in the natural time domain is proposed based on the characteristics of the acoustic emission signal. The K-value, which represents the beginning of the critical state of a complex acoustic emission signal system, is further defined by the improved method of b_value in the natural time domain. For beech, the analysis of critical state time based on characteristic parameters can predict the “collapse” time 8.01 s in advance, while for camphor pines, 3.74 s in advance. K-value can be analyzed at least 3 s in advance of the system “crash” time for beech and 4 s in advance of the system “crash” time for camphor pine. The results show that compared with traditional time-domain acoustic emission signal analysis, natural time-domain acoustic emission signal analysis can discover more available feature information to characterize the state of the signal. Both the characteristic parameters and Natural_Time_b_value analysis in the natural time domain can effectively characterize the time when the complex acoustic emission signal system enters the critical state. Critical state analysis can provide new ideas for wood health monitoring and complex signal processing, etc.

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Poplar Genomics: An Introduction

Porth,

Goessen,

Heinze

2024

Compendium of Plant Genomes

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Genomics-Based Systems and Multi-disciplinary Approaches to Unlock Complex Gene Networks Underlying Wood Formation

Cited by 4 publications

References 117 publications

Xylem cell size regulation is a key adaptive response to water deficit in Eucalyptus grandis

Xylem cell size regulation is a key adaptive response to water deficit in Eucalyptus grandis

Analysis of critical states based on acoustic emission signals during progressive failure of wood

Poplar Genomics: An Introduction

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