Plant Development
The Cellular Basis
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9 Result(s)
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M. Black
Science, Humanities and Social Sciences, multidisciplinary
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Article
Photoperiodic Control of Germination in Seed of Birch (Betula pubescens Ehrh.)
IT is well known that the flowering response of both short-day and long-day herbaceous species is governed by the day-length conditions to which the mature leaves are exposed, and that the meristematic tissue ...
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Interrelationships of Germination Inhibitors and Oxygen in the Dormancy of Seed of Betula
IT has been shown that for ‘seeds’ (achenes) of Betula pubescens a much higher percentage germination is obtained in long days than in short days (approximately 90 and 25 per cent respectively)1. The effect of li...
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Sensitivity of Light-inhibited Seeds to Certain Spectral Regions
IN recent years important progress has been made in our knowledge of the light-dependent processes in plant development. Detailed studies of the action spectrum for the photoperiodic control of flowering and f...
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Article
Similar Effects of Blue and Infra-Red Radiation on Light-sensitive Seeds
EVIDENCE that blue spectral regions affect the germination of light-sensitive seeds has existed for some years, and has recently been confirmed for both light-inhibited1 and light-promoted seeds2,3. Borthwick et ...
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Article
Prevention of the Onset of Seed Dormancy by Gibberellic Acid
ONE of the striking properties of gibberellic acid is its ability to curtail the rest period of seeds and other dormant organs. For example, dormant seeds of lettuce1, peach2, Arabidopsis 3 and barley4 germinate ...
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Promotion of Germination in Light-requiring Seed by Chloramphenicol
IN this laboratory we are investigating germination processes in light-requiring seeds of Latuca sativa L. (var. ‘Grand Rapids’) including protein and nucleic acid synthesis in relation to the photocontrol of ger...
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Immediate Action of Phytochrome in Light-stimulated Lettuce Seeds
SEEDS of Lactuca sativa (var. ‘Grand Rapids’), which we have used in these studies, require a short exposure to red light in order to germinate at 25° C. The promotive effect of red light can be completely nullif...
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Article
Effect of Inhibitors of Protein Synthesis on the Plastic Deformation and Growth of Plant Tissues
MANY workers have confirmed that auxin increases the irreversible deformability (“plasticity”) of plant tissues, for example, coleoptiles or storage tissue1–3. A primary effect of auxin in growth may therefore be...
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