Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Cambial activity

Figure 3. PME isoform patterns in cell wall extracts fiom active and resting cells, a cell wall extracts from successive segments (A, B, C and D) sectioned along mui bean hypocotyb and exhibiting decreasing elongation rates a, and y m c the main PME isoforms present in the extracts, tteir pi are respectively around 7.5, S.5 and above 9.1. b cell wall extracts obtained from poplar cambium and inner bark tissues during cambial active (may) and rest (december and march) periods 1, 2 and 3 represent the activity of 3 groups of PME isoforms with pi around 5-6, 7.5 and above 9.1. Activities expressed as percent of total PME activity present in each extract. Figure 3. PME isoform patterns in cell wall extracts fiom active and resting cells, a cell wall extracts from successive segments (A, B, C and D) sectioned along mui bean hypocotyb and exhibiting decreasing elongation rates a, and y m c the main PME isoforms present in the extracts, tteir pi are respectively around 7.5, S.5 and above 9.1. b cell wall extracts obtained from poplar cambium and inner bark tissues during cambial active (may) and rest (december and march) periods 1, 2 and 3 represent the activity of 3 groups of PME isoforms with pi around 5-6, 7.5 and above 9.1. Activities expressed as percent of total PME activity present in each extract.
Although in the latter case gibberellin appears to be primarily responsible for the increased mitotic activity and auxin for differentiation of the newly formed cells, auxin may also be involved in the primary cambial activation mechanism (25). After the discovery of the gibberellins several studies showed conclusively that auxin and gibberellin have separate, sometimes additive and sometimes syner-... [Pg.54]

Fig. 68.—Photomicrograph of cross-section of stem of Aristolochia sipko, where cambial activity is just beginning, a, Epidermis b, coUenchyma c, thin-walled parenchyma of the cortex, the innermost cell layer of which is the starch sheath or endodermis d, sclerenchyma ring of the pericycle e, thin-walled parenchyma of the pericycle /, primary medullary ray g, phloem h, xylem interfascicular cambium medulla or pith. X 20. (From Stevens.)... Fig. 68.—Photomicrograph of cross-section of stem of Aristolochia sipko, where cambial activity is just beginning, a, Epidermis b, coUenchyma c, thin-walled parenchyma of the cortex, the innermost cell layer of which is the starch sheath or endodermis d, sclerenchyma ring of the pericycle e, thin-walled parenchyma of the pericycle /, primary medullary ray g, phloem h, xylem interfascicular cambium medulla or pith. X 20. (From Stevens.)...
Jute and kenaf fibers develop in the phloem, or bast, region of the stem of the plants, and they appear as wedge-shaped bundles of cells intermingled with parenchyma cells and other soft tissues (Figure 7.1) in the transverse sections of the stem. In the growing part of the stem, a circumferential layer of primary fibers develops from the protophloem, but, as vertical growth ceases in the lower parts, secondary phloem fibers develop as a result of cambial activity. In mature plants, which reach a height of 2.5-3.5 m and a basal diameter of about 25 mm, the secondary fiber accounts for about 90% of the total fiber bundles. [Pg.407]

The plants pass from the vegetative to the reproductive phase when the day length falls below 12.5 h. Vertical growth then ceases and cambial activity declines. The production of cell bundles is much reduced, but, at the same time, the secondary fiber cells begin to mature... [Pg.407]

Cambial activity division, elongation, differentiation, lignification... [Pg.799]

The mode of the germination-stimulatory action of coumarin on plant cells has been widely studied [106—110], and it is similar to the action of plant hormones which control different functions and processes of growth. The relationship between the effects of coumarins and auxins has been suggested [106, 107]. Coumarin in different concentrations stimulates stem and shoot elongation [108, 109] it also elicits a similar action [111] on substances which affect root initiation, cambial activity, and leaf expansion [108, 110]. The plant hormones and coumarin also stimulate the growth of roots. In low concentrations, coumarin exerts a synergistic action with plant growth substances, while with... [Pg.95]

D (Auxin) Stimulates the cambial activity and RDs formation, and promotes the expression of ACC synthase gene (enzyme involved in ethylene biosynthesis) P. elliottii, P. palustris [38. 73. 85. 97. 112, 113]... [Pg.4044]

An early report of kinetin s action on stimulating cambial activity concerned the transition region between shoot and root on dark-grown pea (Sorokin et al. 1962). Kinetin added alone or with auxins to the sucrose and penicillin solution bathing excised sections of the transition internode produced more normal-looking cambial activity and secondary xylem than did the auxins alone, judging by stained sections cut free-hand. [Pg.165]

Atal CK (1961) Effect of gibberellin on the fibers of hemp. Econ Bot 15 133-139 Avery GS, Burkholder PR, Creighton H (1937) Production and distribution of growth hormone in shoots of Aesculus and Malus and its probable role in stimulating cambial activity. Am J Bot 24 51-58... [Pg.168]

Digby J, Wareing PF (1966 a) The effect of applied growth hormones on cambial division and the differentiation of the cambial derivatives. Ann Bot 30 539-548 Digby J, Wareing PF (1966 b) The relationship between endogenous hormone levels in the plant and seasonal aspects of cambial activity. Ann Bot 30 607-622 Esau K (1965) Vascular differentiation in plants. Holt, Rinehart and Winston, New York... [Pg.168]

Peterson RL (1973) Control of cambial activity in roots of turnip (Brassica rapa). Can JBot 51 475-480... [Pg.170]

Reinders-Gouwentak CA (1965) Physiology of the cambium and other secondary mer-istems of the shoot. In Ruhland W (ed) Handbuch der Pflanzenphysiologie XV/1. Springer, Berlin Gottingen Heidelberg, pp 1077-1105 Robards AW, Davidson E, Kidwai P (1969) Short-term effects of some chemicals on cambial activity. J Exp Bot 20 912-921... [Pg.170]

Wangermann E (1967) The effect of the leaf on differentiation of primary xylem in the internode of Coleus blumei Benth. New Phytol 66 747-754 Wangermann E (1970) Autoradiographic localization of soluble and insoluble from [ " C]indolylacetic acid supplied to isolated Coleus internodes. New Phytol 69 919-927 Wareing PF (1958) Interaction between indole-acetic acid and gibberellic acid in cambial activity. Nature 181 1744-1745... [Pg.171]

Wareing PF, Hanney CEA, Digby J (1964) The role of endogenous hormones in cambial activity and xylem differentiation. In Zimmermann MH (ed) The formation of wood in forest trees. Academic Press, London New York, pp 323-344 Wetmore RH, Rier JP (1963) Experimental induction of vascular tissues in callus of angiosperms. Am J Bot 50 418-430... [Pg.171]

Zajaczkowski S (1973) Auxin stimulation of cambial activity in Pinus silvestris. I. The differential cambial response. Physiol Plant 29 281-287 Zajaczkowski S, Wodzicki TJ (1975) Inhibition and requirement of natural stimulator for cambial xylem production in isolated stem segments of Pinus silvestris. Physiol Plant 33 71-74... [Pg.171]

Brown AB, Cormack RGH (1937) Stimulation of cambial activity, locally in the region of application and at distances in relation to a wound, by means of heteroauxin. Can J Res Sec C 15 433-141... [Pg.259]

Brown CL, Wodzicki TJ (1969) A simple technique for investigating cambial activity and differentiation of cambial derivatives. For Sci 15 26-29 Child CM (1941) Patterns and problems of development. Univ Chicago Press, Chicago Crick FHC (1970) Diffusion in embryogenesis. Nature 225 420-422 Crick FHC (1971) The scale of pattern formation. In Davies DD, Balls M (eds) Control mechanisms of growth and differentiation. Symp Soc Exp Biol 25 429 38 de la Fuente RK, Leopold AC (1966) Kinetics of polar auxin transport. Plant Physiol 41 1481-1484... [Pg.260]

Zaj czkowski S (1973) Auxin stimulation of cambial activity in Firms silvestris I. The differential cambial response. Physiol Plant 29 281-287... [Pg.262]

Zaj czkowski S (1978) Cambial activity and the complex of natural growth regulators in Firms silvestris L. (in Polish with English summary) Zesz Nauk Szk G1 Gospod Wiejsk A R 107, Warsaw... [Pg.262]

Zakrzewski J (1983) Hormonal control of cambial activity and vessel differentiation in Quercus robur. Physiol Plant 57 537-542... [Pg.262]

See other pages where Cambial activity is mentioned: [Pg.349]    [Pg.49]    [Pg.53]    [Pg.22]    [Pg.41]    [Pg.301]    [Pg.95]    [Pg.493]    [Pg.161]    [Pg.162]    [Pg.164]    [Pg.164]    [Pg.164]    [Pg.165]    [Pg.180]    [Pg.221]    [Pg.238]    [Pg.245]    [Pg.247]    [Pg.249]    [Pg.261]    [Pg.292]    [Pg.294]    [Pg.64]   
See also in sourсe #XX -- [ Pg.162 , Pg.221 ]



SEARCH



Cambial

© 2024 chempedia.info