Planta

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Application of cryo-ultramicrotomy techniques to microtubules of bracken (Pteridium aquilinum L.) sperm cells
Planta - - 1976
R. Barton
New evidence for a role for thioredoxin h in germination and seedling development
Planta - Tập 200 - Trang 100-106 - 1996
Rosa M. Lozano, Joshua H. Wong, Boihon C. Yee, Anne Peters, Karoly Kobrehel, Bob B. Buchanan
Thioredoxin of the h-type — earlier linked to the reduction of wheat (Triticum durum Desf. cv. Monroe) endosperm proteins — was converted from an oxidized to a partially reduced state during germination and seedling development. While the abundance of thioredoxin progressively decreased during this period, the availability of reducing equivalents, defined as the product of the relative abundance o...... hiện toàn bộ
Effects of temperature and sink activity on the transport of 14C-labelled indol-3yl-acetic acid in the intact pea plant (Pisum sativum L.)
Planta - Tập 147 - Trang 216-224 - 1979
J. Eliezer, D. A. Morris
The velocity and intensity of basipetal transport of 14C-labelled indol-3yl-acetic acid (IAA) applied to the apical bud of the intact pea plant were influenced by the temperature to which the stem was exposed and were not influenced by changes in the temperature of the root system when this was controlled independently between 5°C and 35°C. The velocity of transport increased steadily with tempera...... hiện toàn bộ
Light-stimulated respiration in the green algaDunaliella tertiolecta: Involvement of the ultraviolet/blue-light photoreceptor(s) and phytochrome?
Planta - Tập 174 - Trang 422-425 - 1988
Günter Ruyters
Starch breakdown and respiratory O2 uptake in the green algaDunaliella tertiolecta (Butcher) are stimulated not only by blue, but also by red light. In the present study, attempts are described to identify the photoreceptor(s) involved. Fluence rate-response curves with different slopes in the ultraviolet (UV)/blue and in the red spectral region as well as differences in the kinetics and in the un...... hiện toàn bộ
Sugar uptake by the dermal transfer cells of developing cotyledons of Vicia faba L.
Planta - Tập 198 - Trang 54-63 - 1996
R. McDonald, S. Fieuw, J. W. Patrick
Two experimental systems were developed to study the uptake of sucrose by the dermal transfer cells of developing cotyledons of Vicia faba L. First, the in-vivo state was approximated by short-term (10 min) incubation of whole cotyledons in [14C]sucrose solutions. Under these conditions, a minimum of 67% of the 14C label entered the dermal transfer cell complex. Of this, at least 40% crossed the p...... hiện toàn bộ
Über die Aktivierung des Hemmstoffsystems vonHelianthus durch kurzfristige Belichtung
Planta - Tập 57 - Trang 258-265 - 1961
Margret Bayer
Hypokotylzylinder vonHelianthus annuus wurden mit Hilfe der Agar-Abfangmethode auf ihren Wirkstoffgehalt geprüft. Aus dunkel kultivierten Keimlingen wurde Wuchsstoff während 2–3 Std in Agar abgefangen, teils im Dunkeln, teils bei Belichtung mit etwa 600 Lux. Es konnten aber nur sehr geringe Wuchsstoffmengen erhalten werden, und zwar fast nur in den Dunkelversuchen. Wurde den Agarwürfeln aber eine ...... hiện toàn bộ
The microscopy of P-protein filaments in freeze-etched sieve pores
Planta - Tập 143 - Trang 191-205 - 1978
Richard P. C. Johnson
Intact vascular bundles from Nymphoides peltata (S.G. Gmel.) O. Kuntze, shown to have translocated carbon-14, were freeze-fractured and etched for electron microscopy. The interpretation of freezefractured and etched sieve pores and P-protein filaments seen in them is discussed. The entire widths of most of the sieve pores seen contained filaments separated by less than 100 nm. Their arrangement i...... hiện toàn bộ
Expression of NADH-dependent glutamate synthase protein in the epidermis and exodermis of rice roots in response to the supply of ammonium ions
Planta - - 1998
Keiki Ishiyama, Toshihiko Hayakawa, Tomoyuki Yamaya
Degradation of active-oxygen-modified ribulose-1,5-bisphosphate carboxylase/oxygenase by chloroplastic proteases requires ATP-hydrolysis
Planta - Tập 205 - Trang 459-466 - 1998
Marcelo Desimone, Edgar Wagner, Udo Johanningmeier
Active oxygen (AO) species generated in plants under stress conditions trigger degradation of Rubisco (EC 4.1.1.39). To find out whether AO species activate proteases or make the protein susceptible to proteolysis, purified and 14C-labelled Rubisco protein was incubated with stromal preparations obtained from barley (Hordeum vulgare L.) leaves. The protein was degraded into distinct fragments onl...... hiện toàn bộ
Partial purification and immunological characterization of 1,3-β-glucan synthase from suspension cells of Glycine max
Planta - Tập 181 - Trang 343-348 - 1990
J. Fink, W. Jeblick, H. Kauss
The plasma-membrane-localized 1,3-β-glucan synthase (EC 2.4.1.34) from suspension cultures of Glycine max (L.) Merr. was greatly enriched by a three-step purification procedure. Starting with a microsomal preparation, a six- to eightfold enrichment of the enzyme was achieved by isolating plasma-membrane vesicles in a polyethyleneglycol/dextran two-phase system. The enzyme was solubilized with the ...... hiện toàn bộ
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