Growth Inhibitor Activity in Xanthium in Relation to Photoperiodism.

  title={Growth Inhibitor Activity in Xanthium in Relation to Photoperiodism.},
  author={A. Khudairi and E. Bonde},
  journal={Plant physiology},
  volume={29 6},
Indirect evidence has indicated that a relationship exists between auxin level and the flowering phenomenon in various plants. Hamner and Bonner (8) found that the application of indoleacetic acid in lanolin decreased the amount of flowering response in the shortday plant Xanthium grown under conditions of short photoperiod. Bonner and Thurlow (4) and van Senden (18) showed that auxin applied to the leaves of short-day plants inhibited flowering. Furthermore, when auxin antagonists were applied… Expand
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Effects of Xanthium Leaf Extracts on Lettuce Seed Germination
The present work was conducted to test the possibility that secondary metabolic steps following the initial triggering phase might also be shared by these two morphological processes, and if floral-induced Xanthium leaves produce a substance which promotes lettuce-seed germination or whether non-induced leaves produce an inhibitor of lettuce- Seed plates. Expand
The role of leaves in the perception and inhibition of the flowering stimulus in sugar cane.
The inhibitory effect of lower leaves on flowering can best be interpreted by assuming that the lower leaves produce a transmissible inhibitor which prevents growth of the inflorescence priinoi-clium. Expand


Inhibition of Photoperiodic Induction in Xanthium by Applied Auxin
If plants whose response to photoperiodic induction has been inhibited by auxin application are subsequently grafted as donors to vegetative receptors plants, the donors do not elicit any flowering response in the receptor plants, which indicates that the effect of applied auxin is to inhibit production by or transport from the leaves of the stimulus to floral induction. 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
The Relative Sensitivity of Xanthium Leaves of Different Ages to Photoperiodic Induction.
Wilting and injury to flooded plants can be prevented by forced aeration of the soil, and plants growing in soil at field capacity can be caused to wilt and show symptoms of injury by displacing the soil atmosphere with CO2 or N2. Expand
The effect of auxin on flower initiation.
The structure of the chloroplast and the effects of plant virus diseases on the cells of their hosts are studied in detail. Expand
Studies of auxins and growth-inhibiting substances in the potato tuber and their significance with regard to its rest-period
Studies of auxins and growth-inhibiting substances in the potato tuber and their significance with regard to its rest-period
A naturally occurring antiauxin.
Gray's Manual of Botany.
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Free and bound auxin in the vegetative pineapple plant.