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Effect of Temperature and Preconditioning on Photoperiodic Response of Pharbitis nil.
Temperature and preconditioning effect on photoperiodic response of Pharbitis nil, strain Violet short-day plant
Photoperiodic Flowering Response of Biloxi Soybean in 72-Hour Cycles.
Since Nanda and Hamner have demonstrated a periodic variation in floral response as a function of cycle durations, it was difficult to predict what results might be obtained with various photoperiods given in long cycles of standard duration. Expand
Effect of Mineral Nutrition on the Ascorbic-Acid Content of the Tomato
In general, variations in calcium and nitrate in the nutrient medium produced greater differences in growth and fruitfulness of plants over wider ranges of concentrations than were obvious with the other elements. Expand
Responses of Marchantia polymorpha to Nutrient Supply and Photoperiod
Irrespective of the range of nutrient supply, plants on long Photoperiod were larger and had greater dry weight than similar plants on comparable solutions on short photoperiod, and plants on shortPhotoperiod produced a greater total number of gemmae cups but on longphotoperiod a greater number of gametangiophores than comparable plants onShort photoperperiod. Expand
Photoperiodism in Relation to Hormones as Factors in Floral Initiation and Development
Evidence is presented that the floral initiation substance is not identical with any of the following known plant growth factors: vitamins B1, B2, and B6, ascorbic acid, nicotinic Acid, pantothenic acid), theelin, theelol, inositol, or indoleacetic acid. Expand
Studies on the Nature of the Endogenous Rhythm Affecting Photoperiodic Response of Biloxi Soybean
The results obtained with Biloxi soybean support those obtained by Lockhart and Hamner with Xanthium in which a second dark period following a brief exposure to light partially nullified the effect of an inductive dark period. Expand
Interrelation of Light and Darkness in Photoperiodic Induction
Experimental evidence has indicated that in both the soybean and Xanthium photoperiodic induction is dependent in part upon responses which occur as the result of exposure to light, and those owing to darkness as B, and the resultant changes related to A and B may be referred to as C. Expand
A Spectroradiometer for the Spectral Region of Biological Photosensitivity
The instrument described was specifically designed for measurement of the spectral irradiance of lighting in experimental plant growth chambers. However, without modification it is usable forExpand
Circadian Rhythms and Plant Photoperiodism
Two theories which attempt to explain the photoperiodic responses of both plants and animals on the basis of an endogenous circadian' rhythm of sensitivity to light are considered. Expand