Readjustments of cambial initials in <i>Wisteria floribunda</i> (Willd.) DC. for development of storeyed structure

Kojs, Paweł; Rusin, Aleksandra; Iqbal, Muhammad; Włoch, Wiesław; Jura, Joanna

doi:10.1111/j.1469-8137.2004.01120.x

Cited by 21 publications

(24 citation statements)

References 43 publications

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“…High frequency of such events suggests that the arrangement of rays may be reshuffled in cambial ontogeny without disturbing the double-storied structure. A similar dynamic regulation of morphogenetic patterns was observed in cambium during formation and maintenance of storied arrangement of fusiform initials in Tilia cordata (Zagór-ska-Marek 1984) and Wisteria floribunda (Kojs et al 2004). The rays may also dynamically change their location in cambium of Aesculus turbinata.…”

Section: Discussionsupporting

confidence: 52%

“…Subsequently, a developmental series of tangential sections (35 µm thick each) was cut using a sliding microtome Leica S14 2000R (Leica Instruments, GmbH, Germany). Sections were attached to the glass slides with Haupt's adhesive, deaerated by alternative immersion in boiling and cold absolute alcohol (three times for 15 min) and then embedded in Euparal (protocols after: Hejnowicz and Krawczyszyn 1969;Krawczyszyn 1973;Hejnowicz and Zagórska-Marek 1974;Włoch and Szendera 1992;Kojs et al 2004;Myśkow andZagórska-Marek 2004, 2008;Myśkow 2010).…”

Section: Methodsmentioning

confidence: 99%

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Dynamics of the ray pattern in cambium of Diospyros lotus

Myśkow

Zagórska‐Marek²

2012

Dendrobiology

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Cambial rays, give rise to phloem and xylem rays. This way they affect the efficiency of a radial conducting system in a tree. Both, frequency of rays and their arrangement on the expanding cambial surface must be precisely controlled during tree ontogeny. The main aim of this research was to analyse the changes in the ray arrangement of Diospyros lotus L. cambium during transition from its nonstoried to double-storied structure. In order to trace the history of cambial ray dynamics, the behaviour of wood rays was followed in successive annual rings. Special attention was paid to developmental events, such as initiation and elimination of rays as well as their splitting and uniting. Moreover, the additions and eliminations of ray cell initials at the both opposite ray margins were followed. The most evident was the initial split of high primary rays into the smaller parts and their subsequent separation concurrent with the increase in cambial girth during the first years of a tree ontogeny. Between the existing rays new secondary rays were initiated by segmentation of fusiform initials. These all developmental events led to the formation of a double-storied pattern. In addition, the recurrent uniting and splitting of rays indicated their permanent rearrangement and the dynamic maintenance of a general pattern. The presented data are discussed in light of the processes occurring in cambial rays that lead to the storied pattern formation, which in turn may affect the mechanical properties of the wood.

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Section: Discussionsupporting

confidence: 52%

Section: Methodsmentioning

confidence: 99%

Dynamics of the ray pattern in cambium of Diospyros lotus

Myśkow

Zagórska‐Marek²

2012

Dendrobiology

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“…Anticlinal divisions increase the number of cambial initials. The percentage of added fusiform cells remains considerably higher during the first few years of cambial activity, when the radius of the cambial cylinder is very little; it later decreases markedly when the stem grows thicker (Bailey 1923;Butterfield 1972;Iqbal 1994;Kojs et al 2004b). In an old, thick stem the overall number of fusiform initials added to the cambial circumference is very small, although the anticlinal divisions are more frequent.…”

Section: Anticlinal Divisions Versus Circumferential Growth Of Cambiummentioning

confidence: 98%

Modelling for rearrangement of fusiform initials during radial growth of the vascular cambium in Pinus sylvestris L.

Włoch

Wilczek

Jura‐Morawiec

et al. 2013

Trees

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In contrast to common belief, recent studies have confirmed that intrusive growth of fusiform cambial initials has a significant role in the rearrangement of the initials, but does not contribute to the cambial circumference increment. We observed a rapid rearrangement of cambial initials on a long series of transverse sections of the vascular cambium and the wood of a 50-year-old pine (Pinus sylvestris L.) tree. A comparison of cell arrangement in consecutive sections, as well as a critical analysis of tangential reconstructions, has confirmed that changes in cell locations in a group of cells on the tangential surface caused no change in the total tangential width of the whole group. Models illustrating changes in locations of the initials have been proposed, assuming that intrusive growth, which makes the growing initials intrude between the neighbouring initials and their immediate derivatives, is localized on the longitudinal edges of cells. We infer that intrusive growth of the cambial initials in P. sylvestris is not involved in the cambial circumference increment, but plays a significant role in the rearrangement of the initials, probably allowing for a relaxation of shearing strains generated during radial growth. The relationship of intrusive growth with the elimination of initials has been discussed with reference to the frequency of anticlinal divisions. It has been proposed that the occurrence of anticlinal divisions in excess over the actual requirement for increase in the cambial circumference could be due to internal shearing strains.

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“…The expansion of cambial initials in the circumferential direction, and their anticlinal divisions, help maintain the more or less constant cell dimensions, except during the first few years of the cambial activity when fusiform initials increase their tangential dimensions, especially in both storeyed and non-storeyed cambium (Srivastava 1973 ; Larson 1994 ). During formation of storeyed structure tangential dimensions, especially their length, slightly decreases together with unification of their length (Kojs et al 2004b ; Wilczek 2012 ).…”

Section: Divisions Of Cambial Cellsmentioning

confidence: 99%

How Do Trees Grow in Girth? Controversy on the Role of Cellular Events in the Vascular Cambium

2021

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Radial growth has long been a subject of interest in tree biology research. Recent studies have brought a significant change in the understanding of some basic processes characteristic to the vascular cambium, a meristem that produces secondary vascular tissues (phloem and xylem) in woody plants. A new hypothesis regarding the mechanism of intrusive growth of the cambial initials, which has been ratified by studies of the arrangement of cambial cells, negates the influence of this apical cell growth on the expansion of the cambial circumference. Instead, it suggests that the tip of the elongating cambial initial intrudes between the tangential (periclinal) walls, rather than the radial (anticlinal) walls, of the initial(s) and its(their) derivative(s) lying ahead of the elongating cell tip. The new concept also explains the hitherto obscure mechanism of the cell event called ‘elimination of initials’. This article evaluates these new concepts of the cambial cell dynamics and offers a new interpretation for some curious events occurring in the cambial meristem in relation to the radial growth in woody plants.

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Readjustments of cambial initials in Wisteria floribunda (Willd.) DC. for development of storeyed structure

Cited by 21 publications

References 43 publications

Dynamics of the ray pattern in cambium of Diospyros lotus

Dynamics of the ray pattern in cambium of Diospyros lotus

Modelling for rearrangement of fusiform initials during radial growth of the vascular cambium in Pinus sylvestris L.

How Do Trees Grow in Girth? Controversy on the Role of Cellular Events in the Vascular Cambium

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