Changes in RNA levels in the shoot apex of Silene during the transition to flowering

Planta ◽  
1977 ◽  
Vol 136 (2) ◽  
pp. 167-172 ◽  
Author(s):  
M. B. Miller ◽  
R. F. Lyndon
Keyword(s):  
Shoot Apex ◽  
Transition To Flowering ◽  
Rna Levels

Structural and metabolic changes in the shoot apex in transition to flowering

1971 ◽  
Vol 49 (6) ◽  
pp. 803-819 ◽  
Author(s):  
Georges Bernier
Keyword(s):  
Shoot Apex ◽  
Mitotic Cycle ◽  
Metabolic Changes ◽  
Target Cells ◽  
Time Of Arrival ◽  
Floral Stimulus ◽  
Sequence Of Events ◽  
Flowering Process ◽  
Transition To Flowering

This paper is a review dealing with the various structural and metabolic changes that have been described in the shoot apex in transition to flowering. Evaluation of the significance of these changes can tentatively be made only in cases where a, the timing of physiological events in the plant, particularly the time of movement of the floral stimulus, is reasonably well known; b, the timing and localization of events in the shoot apex are known.For each of the best known cases (Xanthium, Pharbitis, Sinapis, Lolium, Chenopodium), the temporal sequence of events in the target cells of the apical meristem is described and the sequences are compared. Three successive phases of general occurrence are distinguished.1. The evocation phase, including the events occurring at the presumed time of arrival of the floral stimulus at the meristem. During this phase, RNA and protein molecules essential to the flowering process are synthesized.2. The mitotic phase, characterized by the release in mitosis of cells that are in the postsynthetic G2 phase of the mitotic cycle.3. The morphogenesis phase, including the events leading to the production of flower buds.The essentiality and role of the phases are discussed in relation with current views on cell differentiation.

Rates of Growth and Cell Division in the Shoot Apex ofSileneDuring the Transition to Flowering

1976 ◽  
Vol 27 (6) ◽  
pp. 1142-1153 ◽  
Author(s):  
M. B. MILLER ◽  
R. F. LYNDON
Keyword(s):  
Cell Division ◽  
Shoot Apex ◽  
Rates Of Growth ◽  
Transition To Flowering

The distribution of ribosomes in the vegetative and floral apices of Adonis aestivalis

1976 ◽  
Vol 54 (21) ◽  
pp. 2478-2483 ◽  
Author(s):  
Joseph Lin ◽  
Ernest M. Gifford Jr.
Keyword(s):  
Shoot Apex ◽  
Unit Volume ◽  
Central Zone ◽  
Peripheral Zone ◽  
Cell Basis ◽  
Transition To Flowering

The distribution of ribosomes and changes in the ratio of polyribosomes to monoribosomes were determined for the vegetative, transitional, and floral apices of Adonis aestivalis L., a day-neutral plant. Ribosomal counts were made with a Quantimet 720 image-analyzing computer. Two methods in the analysis of the shoot apex were compared: (1) ribosomal distribution based upon the average number of ribosomes per unit volume of cytoplasm (concentration) and (2) distribution based upon total number of ribosomes per cell.It was found that the concentration of ribosomes was greater in the peripheral zone than in the central zone. Increase occurred in the latter zone during transition to flowering. On a per cell basis, however, the number of ribosomes was the greatest in the rib meristem, followed by the central and peripheral zones. During transition to flowering, the number of ribosomes per cell increased only in the peripheral zone.It is suggested that consideration of ribosomal data on a per cell basis may be helpful in achieving a better understanding of the interzonal relationships within the shoot apex.

Cellular and morphological changes at the terminal shoot apex of the short-day plant Pharbitis nil during the transition to flowering

1992 ◽  
Vol 86 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Robert J. Herbert ◽  
Dennis Francis ◽  
John C. Ormrod
Keyword(s):  
Shoot Apex ◽  
Morphological Changes ◽  
Pharbitis Nil ◽  
Short Day ◽  
Terminal Shoot ◽  
Transition To Flowering

Cellular and morphological changes at the terminal shoot apex of the short-day plant Pharbitis nil during the transition to flowering

1992 ◽  
Vol 86 (1) ◽  
pp. 85-92
Author(s):  
Robert J. Herbert ◽  
Dennis Francis ◽  
John C. Ormrod
Keyword(s):  
Shoot Apex ◽  
Morphological Changes ◽  
Pharbitis Nil ◽  
Short Day ◽  
Terminal Shoot ◽  
Transition To Flowering

scholarly journals Growth changes in the shoot apex ofSinapis albaduring transition to flowering

1997 ◽  
Vol 48 (5) ◽  
pp. 1071-1077 ◽  
Author(s):  
Georges Bernier
Keyword(s):  
Shoot Apex ◽  
Growth Changes ◽  
Transition To Flowering
Sign in / Sign up

Export Citation Format

Share Document