8. The role of plant growth regulators in dormancy in forest trees

Lavender, Denis P.; Silim, Salim N.

doi:10.1007/bf00043954

Plant Growth Regul

1987

DOI: 10.1007/bf00043954

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8. The role of plant growth regulators in dormancy in forest trees

Denis P. Lavender

Salim N. Silim

Abstract: The role of plant growth regulators, i .e . indole-3-acetic acid, abscisic acid, gibberellins, cytokinins, and ethylene, in the initiation, maintenance, and breaking of dormancy in perennial, woody, temperate plants is reviewed . Particular topics discussed include : a) roles of individual compounds and antagonistic or synergistic effects of several growth regulators acting simultaneously ; b) problems of compound isolation and identification ; and c) hypotheses for the "modus operandi" of plant growth regulat… Show more

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Cited by 30 publications

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References 70 publications

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“…The high level of auxin in buds and/or in annual shoots during budbreak is considered as the result of increased activity of the apex (Lavender and Salim 1987) and not the reason for it. The low level during the phase of dormancy is suggested to be the result of a low activity of the apex.…”

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Changes in the content of indole-3-acetic acid in the needles of dwarf pine in the course of year

Psota¹,

Klíčová²,

Králík³

1995

Biologia plant.

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The changes in the content of indole-3-acetic acid (IAA) were investigated in the youngest needles of Pinus mugo in the course of year. In newly formed needles, the content of LAA increased, starting from July and reaching its maximum in August to October. The IAA content decreased with a decline in the intensity of apical dominance during dormancy but no changes were observed in budbreak (May and June).

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mentioning

confidence: 99%

Changes in the content of indole-3-acetic acid in the needles of dwarf pine in the course of year

Psota¹,

Klíčová²,

Králík³

1995

Biologia plant.

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SH2D1A and slam protein expression in human lymphocytes and derived cell lines

et al. 2000

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The gene defect responsible for the X‐linked lymphoproliferative disease (XLP) is associated with an impaired control of Epstein‐Barr virus (EBV) infection. The gene has been recently identified and the encoded protein (designated SH2D1A, DSHP or SAP) was characterized. It is a 128 amino acid (aa) protein, containing a single Src homology 2 (SH2) domain. It interacts with signaling lymphocytic activation molecule (SLAM) expressed on the surface of activated T and B cells. We show that activated T, but not activated B, cells express the SH2D1A protein. NK cells express the protein as well. Tumor lines originating from B, T or NK cells exhibited similar SH2D1A protein expression as the corresponding normal cells, with some notable exceptions. EBV‐carrying, tumor phenotype representative (type I), but not EBV‐carrying lymphoblastoid cell line (LCL)‐like (type III) or EBV‐negative Burkitt lymphoma (BL) lines expressed SH2D1A. The phenotypic switch from type I to type III in the EBV‐carrying BL line Mutu was associated with a down‐regulation of SH2D1A and up‐regulation of SLAM. In contrast to normal ex vivo and long‐term activated NK cells, 2 of 3 NK leukemia lines expressed SLAM. All 3 lines expressed SH2D1A, like their normal counterparts. Int. J. Cancer 88:439–447, 2000. © 2000 Wiley‐Liss, Inc.

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Population dynamics of human activated natural killer cells in culture

Pierson

Miller

Verfaillie

et al. 1994

Biotech & Bioengineering

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The growth kinetics and population dynamics of recombinent interleukin-2 (rlL-2) stimulated human natural killer (NK) cell-enriched populations were studied in vitro. The NK-enriched populations was obtained from normal peripheral blood mononuclear cells (PBMNC) by immunomagnetic bead depletion of CD3(+) and CD5(+) T cells. The growth kinetics of NK cells, T cells, monocytes, and total cells are shown. In the absence of PBMNC accessory cells, the NK-enriched population showed limited expansion. In the presence of PBMNC accessory cells, the NK-enriched population expanded threefold more than in the absence of accessory cells due to increased NK cell growth rate and increased duration of exponential growth. Using a Transwell system, which separates two cell population by a polycarbonate membrane, the accessory cells were shown to act on the NK-enriched population via a diffusible factor. Accessory cell conditioned media was able to replace the accessory cell population to stimulate NK cell expansion. A monocyte-enriched population prepared by sheep red blood cell rosetting of T cells was extensively phenotyped and compared with the NK-enriched populations. Although the final cultured cells were phenotypically homogeneous for CD56(+)/CD3(-) NK cells, the initial NK precusor populations appear to be different. Namely, the NK cell precursors in the monocyte-enriched population were predominantly CD56(+)/CD2(-). Kinetic equations were formulated for this culture system and the effects of major culture variables are investigated.

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8. The role of plant growth regulators in dormancy in forest trees

Cited by 30 publications

References 70 publications

Changes in the content of indole-3-acetic acid in the needles of dwarf pine in the course of year

Changes in the content of indole-3-acetic acid in the needles of dwarf pine in the course of year

SH2D1A and slam protein expression in human lymphocytes and derived cell lines

Population dynamics of human activated natural killer cells in culture

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