Results 21 to 30 of about 1,785 (142)
Adaptive divergence in shoot gravitropism creates hybrid sterility in an Australian wildflower. [PDF]
Proc Natl Acad Sci U S A, 2021 Significance New species originate as populations become reproductively isolated from one another. Despite recent progress in uncovering the genetic basis of reproductive isolation, it remains unclear whether intrinsic reproductive barriers, such as hybrid sterility, can evolve as a by-product of local adaptation to contrasting ...
Wilkinson MJ +9 more
europepmc +8 more sources
Inclination not force is sensed by plants during shoot gravitropism. [PDF]
Sci Rep, 2016 AbstractGravity perception plays a key role in how plants develop and adapt to environmental changes. However, more than a century after the pioneering work of Darwin, little is known on the sensing mechanism. Using a centrifugal device combined with growth kinematics imaging, we show that shoot gravitropic responses to steady levels of gravity in four
Chauvet H +4 more
europepmc +6 more sources
Gravitropism in Higher Plant Shoots [PDF]
Plant Physiology, 1984 Cross and longitudinal sections were prepared for light microscopy from vertical control plants (Xanthium strumarium L. Chicago strain), free-bending horizontal stems, plants restrained 48 hours in a horizontal position, and plants restrained 48 hours and then released, bending immediately about 130 degrees .
J E, Sliwinski, F B, Salisbury
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Spatio-temporal kinematic analysis of shoot gravitropism in Arabidopsis thaliana. [PDF]
Plant Biotechnol (Tokyo), 2020 Plant shoots can bend upward against gravity, a behavior known as shoot gravitropism. The conventional quantification of shoot bending has been restricted to measurements of shoot tip angle, which cannot fully describe the spatio-temporal bending process.
Tsugawa S +5 more
europepmc +3 more sources
The Role of Brassinosteroids in Shoot Gravitropism [PDF]
Plant Physiology, 2011 In the current model of gravitropism, negative gravitropic (upward) growth of the shoot of a dicotyledonous plant involves sedimentation of starch-containing plastids (statoliths) in the endodermis (starch sheath). Here we show that high levels of brassinosteroids (BRs) counteract gravitropic growth, while BR deficiency enhances gravitropism ...
Vandenbussche, Filip +5 more
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Sequence of Key Events in Shoot Gravitropism [PDF]
Plant Physiology, 1984 It has recently been shown that asymmetric acid efflux is closely correlated with the gravitropic curvature of plant shoots and roots. The research reported here addresses whether auxin (IAA) redistribution in shoots is the cause or result of asymmetric acid efflux.When abraded sunflower (Helianthus annuus cv Mammoth) hypocotyls are submerged in 20 ...
F, Migliaccio, D L, Rayle
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Gravitropism in Higher Plant Shoots [PDF]
Plant Physiology, 1981 It has long been known that applied ethylene can redirect the gravitropic response, but only occasionally has it been suggested that ethylene normally plays a role in gravitropism. Two inhibitors of ethylene synthesis [Co(2+) and aminoethoxyvinylglycine (AVG)] and two inhibitors of ethylene action (Ag(+) and CO(2)) were shown to delay the gravitropic ...
R M, Wheeler, F B, Salisbury
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Gravitropism in Higher Plant Shoots [PDF]
Plant Physiology, 1988 An alternative to the Cholodny-Went, auxin-transport hypothesis of gravitropic stem bending was proposed as early as 1958, suggesting that gravistimulation induces changes in sensitivity to auxin, accounting for differential growth and bending.
F B, Salisbury +2 more
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Gravitropism in Higher Plant Shoots [PDF]
Plant Physiology, 1986 Ethylene at 1.0 and 10.0 cubic centimeters per cubic meter decreased the rate of gravitropic bending in stems of cocklebur (Xanthium strumarium L.) and tomato (Lycopersicon esculentum Mill), but 0.1 cubic centimeter per cubic meter ethylene had little effect.
R M, Wheeler, R G, White, F B, Salisbury
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Arabidopsis thaliana: A Model for the Study of Root and Shoot Gravitropism [PDF]
The Arabidopsis Book, 2002 For most plants, shoots grow upward and roots grow downward. These growth patterns illustrate the ability for plant organs to guide their growth at a specified angle from the gravity vector (gravitropism). They allow shoots to grow upward toward light, where they can photosynthesize, and roots to grow downward into the soil, where they can anchor the ...
Patrick H, Masson +5 more
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