Inhibition of Shoot Geotropism by Neutral Buffers
نویسندگان
چکیده
منابع مشابه
Inhibition of shoot geotropism by neutral buffers.
Submerged hypocotyl sections from Helianthus have been used to test the effect of neutral buffers on shoot geotropism. When hypocotyls have been abraded, it is found that increasing the molarity (0.25 to 20 mm) of pH 6.8 K-phosphate buffer, as well as other buffering systems, results in a strong inhibition of geotropic curvature. Buffer strength has no such effect on the curvature of nonabraded...
متن کاملIs there a role for the apex in shoot geotropism?
Experiments with horizontal etiolated sunflower (Helianthus annuus L.) seedlings supported centrally such that both apical and basal ends are free to react to geostimulus, revealed that the apical end commences curvature 1 to 2 hours earlier than the basal end. The later curvature in the basal region is a consequence of the absence of growth in the initial period rather than merely slower growt...
متن کاملGeotropism of Agriolimax
On an inclined glass plate the slug Agriolimax orients and creeps upward or downward. The angle of orientation on the plane (theta) is proportional to the logarithm of the component of gravity in the creeping plane. The coefficient of variability of the measured values of (theta) decreases linearly as the logarithm at the gravity component in the creeping plane increases. The cosine of the angl...
متن کاملRespiration and Geotropism in Vicia Faba. I
In this paper there are given the results of a study of the relation of respiration to temperature, in seedlings of Vicia faba, and of the onset of geotropic response. It is shown that with due care and very accurate control of temperature constancy, one can get constant excretion of CO(2) even over fairly long periods. The treatment of the experimental data shows that the Q(10) ratio is of cou...
متن کاملOn Reversal of Geotropism in Asterina
A certain level of strychninization induces in Asterina reversal of geotropism from the normally geonegative movement to a persistent downward creeping. The effect of an attached float producing upward pull is to induce upward creeping, under these conditions, whereas normally it leads to downward movement. This reversal cannot be regarded as due to a mere intensification of the sensory effect ...
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: 1982
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.69.1.278