Regulation of Cambium Activity

Aloni, Roni

doi:10.1007/978-3-030-53202-4_11

Cited by 2 publications

(3 citation statements)

References 65 publications

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Section: Introductionmentioning

confidence: 99%

“…It is well established that N increases tree volume production by stimulating the activity of the vascular cambium through an unknown mechanism that most likely includes cytokinins (Aloni 2021). Functional studies with cytokinin biosynthetic and catabolic genes in both Arabidopsis thaliana and hybrid aspen supported the role of cytokinins in the regulation of cambial activity (Matsumoto‐Kitano et al 2008; Nieminen et al 2008; Immanen et al 2016), but the link to N status of the plants was not studied.…”

Section: Introductionmentioning

confidence: 99%

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The effect of nitrogen source and levels on hybrid aspen tree physiology and wood formation

Renström,

Choudhary,

Gandla

et al. 2024

Physiologia Plantarum

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Nitrogen can be taken up by trees in the form of nitrate, ammonium and amino acids, but the influence of the different forms on tree growth and development is poorly understood in angiosperm species like Populus. We studied the effects of both organic and inorganic forms of nitrogen on growth and wood formation of hybrid aspen trees in experimental conditions that allowed growth under four distinct steady‐state nitrogen levels. Increased nitrogen availability had a positive influence on biomass accumulation and the radial dimensions of both xylem vessels and fibers, and a negative influence on wood density. An optimal level of nitrogen availability was identified where increases in biomass accumulation outweighed decreases in wood density. None of these responses depended on the source of nitrogen except for shoot biomass accumulation, which was stimulated more by treatments complemented with nitrate than by ammonium alone or the organic source arginine. The most striking difference between the nitrogen sources was the effect on lignin composition, whereby the abundance of H‐type lignin increased only in the presence of nitrate. The differential effect of nitrate is possibly related to the well‐known role of nitrate as a signaling compound. RNA‐sequencing revealed that while the lignin‐biosynthetic genes did not significantly (FDR <0.01) respond to added NO3−, the expression of several laccases, catalysing lignin polymerization, was dependent on N‐availability. These results reveal a unique role of nitrate in wood formation and contribute to the knowledge basis for decision‐making in utilizing hybrid aspen as a bioresource.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of nitrogen source and levels on hybrid aspen tree physiology and wood formation

Renström,

Choudhary,

Gandla

et al. 2024

Physiologia Plantarum

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show abstract

“…It is defined as the actively dividing layer of cells that lies between and gives rise to the secondary xylem and phloem [1][2][3]. Wood is formed through cambial activity, promoting growth and cell division in plants' root, stem, and leaves [4][5][6]. The multiplication and division of these cells cause plant girth to increase and stimulate the production of xylem and phloem cells.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cambium Mechanism in Plants in Relation to Different Environmental Stresses

Rashid,

Li,

Farooq

et al. 2023

Pol. J. Environ. Stud.

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The cambial response of most plants varies with exposure to different environmental stresses, affecting their morphological and physiological features. The timing of cambial reactivation contributes to the quality of wood produced and the ability of plants to adapt to environmental conditions. Cambial structure and function provide insights into the genetic components or mechanisms underlying the secondary growth of plants. This study aimed to investigate how environmental stresses such as temperature, water, and phosphorus affect cambial activity mechanisms and xylem differentiation in different plant species. Under temperature regulation, cambial reactivation and xylem differentiation occur earlier in young cambium than in mature cambium, even under the same environmental conditions. Studies suggest that the cambial response to temperature regulation is related to the age of the cambium. During high heat waves and extended periods despite the rain, the number of new tracheids on trees seemed to decrease, and their radial diameters diminished. In low phosphorus (P) soils, the increasing timber density was therefore connected with the inhibited stem cambial activity, which resulted in a higher amount of photoassimilates for the secondary wall thickening of fibre cells. Under P deficiency, root anatomy changes with respect to stele diameter, root diameter, and meta-xylem vessels. Ultimately, changes in climatic conditions have a significant impact on the physiological characteristics of particular plant genera.

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Regulation of Cambium Activity

Cited by 2 publications

References 65 publications

The effect of nitrogen source and levels on hybrid aspen tree physiology and wood formation

The effect of nitrogen source and levels on hybrid aspen tree physiology and wood formation

Influence of Cambium Mechanism in Plants in Relation to Different Environmental Stresses

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