INCREASE IN GIRTH OF THE CAMBIUM IN <i>THUJA OCCIDENTALS</i> L.

Whalley, B.

doi:10.1139/cjr50c-019

Cited by 27 publications

(14 citation statements)

References 1 publication

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“…For his study, he used grand fir trees of larger dianleter (12-32 in. diameter at breast height (DBH)) than in this study, which would be expected t o have a wider canlbial zone and longer initials, consistent with the age changes discussed by Bailey (1920), Whalley (1950), andBannan (1960). Sisson (1971) also postulated that the number of cambial zone cells in the dornlant canlbiu~u is probably related t o tree vigor rather than t o aphid infestation.…”

Section: Methodssupporting

confidence: 73%

Anatomical changes in the secondary phloem of grand fir (Abies grandis) induced by the balsam woolly aphid (Adelges piceae)

Saigo¹

1976

Can. J. Bot.

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This study examines the microscopic anatomy and seasonal changes of the secondary phloem, cambium, and a portion of the xylem of grand fir trees (Abies grandis [Dougl.] Lindl.) infested with the balsam woolly aphid (Adelges piceae Ratz.) as compared with tissues of non-infested trees.The reactivation of the vascular cambium and production of astrosclereids and resin cells are about the same in infested and non-infested trees.The infested trees exhibit sieve cells that are shorter in length, having a tangential dimension about the same as normal cells, and produce more tangential bands of phloem parenchyma cells, more fiber sclereids, biseriate rays, and lipoidal-filled ray cells, abnormally shaped ray parenchyma cell nuclei, giant cortical parenchyma cells, and traumatic resin ducts in the xylem.

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Section: Methodssupporting

confidence: 73%

Anatomical changes in the secondary phloem of grand fir (Abies grandis) induced by the balsam woolly aphid (Adelges piceae)

Saigo¹

1976

Can. J. Bot.

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“…The finding that large changes in cell inclination were associated with significant increases in the frequency of both radial anticlinal and pseudotransverse division indicates that both radial anticlinal divisions produce a pool of initials from which the cells most suited to reorient through the process of end creeping are selected. Similarly, Berlyn (1982) suggests that there is selection of the fittest from the surplus of initials known to be produced by the nonstoreyed cambium (Bannan 1950(Bannan , 1960Whalley 1950;Hejnowicz 1961;Evert 196 1;Cheadle and Esau 1964).…”

Section: Figmentioning

confidence: 96%

Pseudotransverse divisions and intrusive elongation of fusiform initials in the storeyed cambium of Tilia

Zagórska‐Marek¹

1984

Can. J. Bot.

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ZAGORSKA-MAREK, B. 1984. Pseudotransversc divisions and intrusive elongation of fusiform initials in thc storcyed cambium of Tilitr. . The inclination. shape, and disappearance of individual fusiform initials wcrc studicd in thc storcycd cambium of Tilin. Changes in inclination wcrc accomplished through oricntcd cell-end shifting and pscudotransvcrsc divisions combined with intrusive elongation. Rapid reorientation was associated with an increase in both radial and pseudotransversc anticlinal divisions, resulting in an ovcrproduction of daughter cells; surplus cells wcrc climinated. creating spacc for the intrusive elongation of adjoining initials. The storeyed pattern was both disrupted and restored as a consequence of pseudotransverse divisions and intrusive elongation. Abnormally elongated cell ends shortened to thc level of the storey border. Movement between storeys occurred as a result of intrusive elongation of one cell end in association with either pseudotransversc division or a gradual shortening of the opposite end. The combined findings of fluctuations in cell inclination, movement between storeys, and continual disturbance and restoration of the storeyed pattern indicate that dcvelopmental changes in the storeyed cambium are much more dynamic than previously suspected. ZAGORSKA-MAREK, B. 1984. Pseudotransverse divisions and intrusive elongation of fusiform initials in the storeyed cambium of ti lit^. Can. J. Bot. 62: 20-27. L'inclinaison, la forme et la disparition de ehaque initiale fusiforme ont CtC dtudiCes dans du cambium bien CtagC de Tilin.

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“…THE MOST intensive studies on the developmental changes in the vascular cambium associated with the increase in circumference of this meristem have been made on conifers (Whalley, 1950;Bannan, 1950Bannan, -1964Hejnowiez, 1961). On the other hand there have been few comprehensive studies on the dicotyledons.…”

mentioning

confidence: 99%

Developmental Changes in the Vascular Cambium in Leitneria Floridana

Cumbie

1967

American J of Botany

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Developmental changes in the vascular cambium of Leitneria floridana, a shrub, were determined primarily by an analysis of the secondary xylem. During the production of the first growth ring of secondary xylem, 37% of the anticlinal divisions in the fusiform initials were lateral, the remaining were oblique. The oblique partition averaged ½ of the length of the dividing initials during this period of growth. Following their origin in anticlinal division, daughter cells elongated at a rapid rate until they were about as long as the mean for all cells, and then most cells elongated at a slow rate. Almost all initials survived during the formation of the inner secondary xylem (growth rings 1–10), and few new rays were formed from fusiform initials. During the production of the outer secondary xylem (growth rings 22–26), lateral divisions accounted for less than 5% of all anticlinal divisions. The oblique partition averaged only ¼ of the length of the dividing cells during this period, although the mean length of dividing initials was relatively constant throughout secondary growth. About 20% of the initials studied during the deposition of the outer secondary xylem disappeared from the cambium, and many others were transformed into ray initials. The findings are discussed in relation to the developmental changes in the vascular cambium in plants of different habits.

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INCREASE IN GIRTH OF THE CAMBIUM IN THUJA OCCIDENTALS L.

Cited by 27 publications

References 1 publication

Anatomical changes in the secondary phloem of grand fir (Abies grandis) induced by the balsam woolly aphid (Adelges piceae)

Anatomical changes in the secondary phloem of grand fir (Abies grandis) induced by the balsam woolly aphid (Adelges piceae)

Pseudotransverse divisions and intrusive elongation of fusiform initials in the storeyed cambium of Tilia

Developmental Changes in the Vascular Cambium in Leitneria Floridana

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