An Unusual Stem Bending Response of Xanthium pensylvanicum to Horizontal Rotation
نویسندگان
چکیده
منابع مشابه
An Unusual Stem Bending Response of Xanthium pensylvanicum to Horizontal Rotation.
When a plant is rotated on a clinostat, with its axis parallel to the ground, the axis may remain straight. According to Sachs (9), the successive stimuli of gravity compensate each other and, therefore, there is no tropic reaction. Czapek (4) on the other hand, felt that under these conditions, there is no perception of the gravity by the plant and consequently no tropic reaction. In connectio...
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 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 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 کاملIron content and ferritin in leaves of iron treated Xanthium pensylvanicum plants.
Iron administration to iron-starved cocklebur (Xanthium pensylvanicum) plants causes an increase in the iron content of ferritin fractions extracted from mature leaves. Xanthium plants grown under long days (vegetative stage) have more iron and ferritin than similarly iron-treated plants induced to flower under short day regimes. This first demonstration of ferritin in cocklebur (Compositae) le...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Plant Physiology
سال: 1962
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.37.4.453