35 Result(s)

Article

Effects of Gibberellin and Cytokinins on the Activity of Photosynthetic Enzymes and Plastid Ribosomal RNA Synthesis in Phaseolus vulgaris L.

Applications of hormones to fully expanded leaves of dwarf bean stimulate the activity of carboxydismutase. The increase in enzyme activity is not paralleled by synthesis of plastid ribosomal RNA nor is there ...

K. J. TREHARNE, J. L. STODDART, J. PUGHE, K. PARANJOTHY, P. F. WAREING in Nature (1970)

Article

Effect of Abscisic Acid on Activity of Chromatin

THE pretreatment of dark-grown radish hypocotyls with abscisic acid (ABA) reduces their capacity for extension growth. Accompanying the growth response there is a small reduction in incorporation of nucleic ac...

J. ALAN PEARSON, P. F. WAREING in Nature (1969)

Article

Rate-limiting Processes in Photosynthesis at Saturating Light Intensities

Partial defoliation leads to increased photosynthetic rates and increased levels of carboxylating enzymes, suggesting that in normal field conditions photosynthetic rates are limited by the levels of carboxyla...

P. F. WAREING, M. M. KHALIFA, K. J. TREHARNE in Nature (1968)

Article

Distribution of Auxin in Horizontal Woody Stems in Relation to Gravimorphism

THE response of an inclined branch of an angiosperm tree to gravitational stimulation is manifested in several ways. Usually the young apical region exhibits a negative geotropic curvature, resulting from incr...

R. W. A. LEACH, P. F. WAREING in Nature (1967)

Article

Light Requirements of Buried Seeds

IT is well known that the upper layers of many types of soil contain large populations of buried, dormant seeds estimated to amount to many thousands per acre in some instances¹. Many of these buried seeds are vi...

G. WESSON, P. F. WAREING in Nature (1967)

Article

Advancing Botany

Advances in Botanical Research

P. F. WAREING in Nature (1967)

Article

Stimulation of Flowering in Certain Short-day Plants by Abscisin

ALTHOUGH day-length is known to control flowering in some plant species, and a variety of vegetative responses, including dormancy, runnering and tuberization, in other species the relationship between these d...

H. M. M. EL-ANTABLY, P. F. WAREING in Nature (1966)

Article

Chemistry and Physiology of ‘Dormins’ In Sycamore: Identity of Sycamore ‘Dormin’ with Abscisin II

J. W. CORNFORTH, B. V. MILBORROW, G. RYBACK, P. F. WAREING in Nature (1965)

Article

Chemistry And Physiology of ‘Dormins’ In Sycamore: Action of the Sycamore ‘Dormin’ as a Gibberellin Antagonist

T. H. THOMAS, P. F. WAREING, P. M. ROBINSON in Nature (1965)

Article

Auxin and Gibberellin-like Substances in Peanut (Arachis hypogaea)

THE results here presented are part of an investigation on dormancy in seeds of the peanut, variety ‘Virginia Bunch’. This variety requires ‘after ripening’ in dry storage for about 4 months in natural conditi...

AHUVA GORDIN-SHARIR, P. F. WAREING in Nature (1964)

Article

Promotion of Cell Division in Tissue Cultures by Gibberellic Acid

IT is well established that gibberellic acid (GA) stimulates not only cell extension but also cell division in intact plants^1,2. It has been shown that cambial division is stimulated when GA is applied to disbudd...

J. DIGBY, T. H. THOMAS, P. F. WAREING in Nature (1964)

Article

Dormancy Regulators in Woody Plants: Experimental Induction of Dormancy in Betula pubescens

C. F. EAGLES, P. F. WAREING in Nature (1963)

Article

Dormancy Regulators in Woody Plants: Isolation of the Inhibitor varying with Photoperiod in Acer pseudoplatanus

P. M. ROBINSON, P. F. WAREING, T. H. THOMAS in Nature (1963)

Article

Effects of Indolyl-3-Acetic Acid on the Movement of Nutrients within Plants

IT has been suggested that apical dominance and the ‘correlative inhibition’ of lateral buds may involve the diversion of nutrients towards actively growing regions, and that the role of auxin in correlative i...

A. BOOTH, J. MOORBY, C. R. DAVIES, H. JONES, P. F. WAREING in Nature (1962)

Article

Changes in Endogenous Gibberellins in Relation to Chilling of Dormant Seeds

EMERGENCE from the rest period in potato tubers has been correlated with an increase in the level of endogenous gibberellin¹. There have been no reports of similar observations with respect to breaking of seed do...

B. FRANKLAND, P. F. WAREING in Nature (1962)

Article

Interaction of Growth Inhibitor and a Natural Germination Stimulator in the Dormancy of Fraxinus excelsior L.

DORMANCY of seeds of the genus Fraxinus has been variously ascribed to immaturity of the embryo¹, mechanical resistance of the seed coats^2,3, and the presence of growth-inhibiting substances within the pericarp³ ...

T. A. VILLIERS, P. F. WAREING in Nature (1960)

Article

Effect of Gibberellic Acid on Hypocotyl Growth of Lettuce Seedlings

GIBBERELLINS are physiologically defined by their ability to induce shoot elongation in certain dwarf plants and they have been demonstrated in various plant extracts using dwarf maize plants¹ and dwarf peas^2–4 a...

B. FRANKLAND, P. F. WAREING in Nature (1960)