Development of cambium and length of vessel elements and fibers in dwarfAlnus hirsuta (Spach) rupr

Lim, Dong Ok; Son, Woong Young

doi:10.1007/bf03030455

Cited by 3 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increased vessel proportion in the wood, despite a reduction in dimensions of vessel elements as recorded in this study ( Table 5), indicates that vessels differentiated in larger numbers in the polluted atmosphere, possibly as part of an adaptive strategy. Since the size of fusiform cambial initials changes under the influence of environmental conditions (Iqbal and Ghouse 1990), the shortening of vessel elements and xylem fibers under pollution stress could be due to either a reduced length of their precursor fusiform initials, or a reduced capacity of differentiating wood elements to elongate under stressful conditions (Lim and Soh 1997). Studies on mango trees growing under coal-smoke pollution have suggested that the length of vessel elements could be more sensitive to pollutants than their width, or that the morphogenetic factors controlling the vessel-element length were the first to be impaired by the pollutants (Gupta and Iqbal 2005).…”

Section: Cambial Growth and Wood Productionmentioning

confidence: 99%

Behavioral responses of leaves and vascular cambium ofProsopis cineraria(L.) Druce to different regimes of coal-smoke pollution

Iqbal

Mahmooduzzafar

Aref

et al. 2010

Journal of Plant Interactions

View full text Add to dashboard Cite

The foliar and cambial responses of Prosopis cineraria to five different coal-smoke regimes in Delhi, India, were studied using the monthly collections of leaves and cambial blocks as well as the data on SO 2 , NO 2 and particulate concentrations from each of the five study sites. Coal-smoke inhibited pigment concentration, NR activity and sugar content and promoted stomatal index and the nitrate and sulfur contents. Stomatal conductance was low, leading to a drop in the net photosynthetic rate. Cambial activity started quite late and the annual increment of wood was reduced despite a prolonged active phase, possibly due to a distinctly retarded rate of cambial cell division. Vessel proportion in the wood increased but the size of vessel elements and fibers decreased. Such studies may help in identifying trees suitable for cultivation in the pollutionaffected areas.

show abstract

Section: Cambial Growth and Wood Productionmentioning

confidence: 99%

Behavioral responses of leaves and vascular cambium ofProsopis cineraria(L.) Druce to different regimes of coal-smoke pollution

Iqbal

Mahmooduzzafar

Aref

et al. 2010

Journal of Plant Interactions

View full text Add to dashboard Cite

show abstract

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

View full text Add to dashboard Cite

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.

show abstract

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

2021

View full text Add to dashboard Cite

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.

show abstract

Development of cambium and length of vessel elements and fibers in dwarfAlnus hirsuta (Spach) rupr

Cited by 3 publications

References 18 publications

Behavioral responses of leaves and vascular cambium ofProsopis cineraria(L.) Druce to different regimes of coal-smoke pollution

Behavioral responses of leaves and vascular cambium ofProsopis cineraria(L.) Druce to different regimes of coal-smoke pollution

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

Contact Info

Product

Resources

About