Inhibition of Flowering of Xanthium pensylvanicum Wallr. by Prolonged Irradiation with Far Red
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Inhibition of Flowering of Xanthium pensylvanicum Wallr. by Prolonged Irradiation with Far Red.
Interrupting each long night with a prolonged period of far red radiant energy resulted in the inhibition of floral initiation in cocklebur. Irradiations inducing different relative levels of P(FR) from 1 to 2% to 80% had about the same effect under 4-hour photoperiods. The lower levels of P(FR) induced by continuous far red irradiation were not as effective as the higher levels induced by red ...
متن کاملControl of Flowering of Xanthium pensylvanicum by Red and Far-red Light.
A study was made of the effects of various durations, intensities and combinations of red and far-red light interruptions on the flowering responses of Xanthium pensylvanicum Wallr. A dual response to treatments of far-red light was observed. In short dark periods, far-red light alone did not greatly affect flowering but was able to overcome the inhibition of flowering caused by red light. In d...
متن کاملInhibition of Flowering in Xanthium pensylvanicum Walln. by Ethylene.
Bonner and Thurlow (3) reported that indoleacetic acid (IAA) inhibited the formation of flowers in cockleburs (Xanthium pensylvanicum Walln.) when it was applied as a spray during the long inductive night. In this report, evidence is presented that ethylene also inhibits the flowering of cocklebur plants that have been exposed to a long inductive photoperiod and that the IAA effect is probably ...
متن کاملXanthium leaf movements in light and dark.
Bunning suggested that circadian rhythms provide the basis for time measurement in the photoperiodic responses of plants (2). A classic example is found in Glycine max. L. Merr. (Biloxi soybean), whose flowering response occurs in a rhythmical form having peaks of flowering that were approximately 24 hr apart (6). Recentlv Moore et al. (5) reported that Xanthiuim pensylvanicum did not exhibit a...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1967
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.42.1.95