Effects of exogenous gibberellins and paclobutrazol on floral stalk growth of tulip sprouts isolated from cooled and non-cooled tulip bulbs

1994 ◽  
Vol 92 (4) ◽  
pp. 661-667 ◽  
Author(s):  
Mariken Rebers ◽  
Gaea Romeijn ◽  
Erik Knegt ◽  
Linus H. W. van der Plas
Keyword(s):  
Tulip Bulbs

Peroxidases from Tulip Bulbs (Tulipa fosteriana, L.) Oxidize Xenobiotics NNitrosodimethylamine and N-Nitroso-N-methylaniline in vitro

1997 ◽  
Vol 62 (11) ◽  
pp. 1804-1814 ◽  
Author(s):  
Marie Stiborová ◽  
Hana Hansíková
Keyword(s):  
Cytochromes P450 ◽  
Kinetic Studies ◽  
The Other ◽  
Maximal Velocity ◽  
Michaelis Constant ◽  
Other Hand ◽  
Plant Peroxidases ◽  
Tulip Bulbs

Tulip bulbs (Tulipa fosteriana, L.) contain peroxidases catalyzing the oxidation of the xenobiotics N-nitrosodimethylamine (NDMA) and N-nitroso-N-methylaniline (NMA). Three anionic (A1, A2, A3) and four cationic (B, C, D, E) peroxidases were purified from this tissue, partially characterized and used for kinetic studies. Demethylation of NDMA and NMA producing formaldehyde is catalyzed by one anionic (A1) and three cationic (C, D, E) peroxidases. The oxidation of NDMA by tulip peroxidases exhibits the Michaelis-Menten kinetics. The apparent Michaelis constant and the maximal velocity values for this substrate were determined. On the other hand, non-Michaelian kinetics for the NMA oxidation were observed with tulip peroxidases. The most abundant cationic peroxidase (peroxidase C) was used for detailed enzymatic studies. In addition to formation of formaldehyde, methylaniline, aniline, 4-aminophenol and phenol were found to be metabolites formed from NMA. Phenol was formed presumably by N-demethylation via a benzenediazonium ion, while methylaniline, aniline and 4-aminophenol were products of denitrosation of the substrate. The efficiencies of plant peroxidases to oxidize NDMA and NMA in vitro are compared with those of cytochromes P450 and discussed.

Different amounts of cytochrome P-450 dependent monooxygenases in tulip bulbs, pea seedlings and maize endosperm cells

Plant Science ◽  
1994 ◽  
Vol 99 (2) ◽  
pp. 135-140 ◽  
Author(s):  
Laura Marabini ◽  
Sonia Radice ◽  
Barbara Cipelletti ◽  
Enzo Chiesara
Keyword(s):  
Maize Endosperm ◽  
Pea Seedlings ◽  
Tulip Bulbs ◽  
Cytochrome P 450

scholarly journals Purification of a single major form of microsomal cytochrome P-450 from tulip bulbs (Tulipa gesneriana L.).

1985 ◽  
Vol 49 (8) ◽  
pp. 2399-2405 ◽  
Author(s):  
Ken HIGASHI ◽  
Kie IKEUCHI ◽  
Masanobu OBARA ◽  
Yuji KARASAKI ◽  
Hideyasu HIRANO ◽  
...  
Keyword(s):  
Tulipa Gesneriana ◽  
Microsomal Cytochrome ◽  
Major Form ◽  
Tulip Bulbs ◽  
Cytochrome P 450

scholarly journals Carbohydrate Status of Tulip Bulbs during Cold-Induced Flower Stalk Elongation and Flowering

1994 ◽  
Vol 104 (2) ◽  
pp. 515-520 ◽  
Author(s):  
H. Lambrechts ◽  
F. Rook ◽  
C. Kolloffel
Keyword(s):  
Flower Stalk ◽  
Tulip Bulbs ◽  
Carbohydrate Status

scholarly journals Methyl Jasmonate Induces Gum and Inhibits Stem Growth Promoted by Auxin in Uncooled Tulip Bulbs

10.5109/4620 ◽  
2005 ◽  
Vol 50 (1) ◽  
pp. 41-47
Author(s):  
Marian Saniewski ◽  
Junichi Ueda ◽  
Kensuke Miyamoto ◽  
Hiroshi Okubo ◽  
Jerzy Puchalski
Keyword(s):  
Methyl Jasmonate ◽  
Stem Growth ◽  
Tulip Bulbs

scholarly journals Changes in Carbohydrate and ABA Content during GA-induced Growth of Non-cooled Tulip Bulbs

10.5109/9321 ◽  
2007 ◽  
Vol 52 (2) ◽  
pp. 321-324
Author(s):  
Xing Min Geng ◽  
Azusa Sato ◽  
Hiroshi Okubo ◽  
Marian Saniewski
Keyword(s):  
Tulip Bulbs ◽  
Aba Content

scholarly journals Effects of sugars on the growth and chlorophyll content in excised tulip stem in the presence of Indole-3-acetic acid

2012 ◽  
Vol 20 (1) ◽  
pp. 97-114 ◽  
Author(s):  
Elżbieta Węgrzynowicz-Lesiak ◽  
Marian Saniewski ◽  
Justyna Góraj ◽  
Marcin Horbowicz ◽  
Kensuke Miyamoto ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Chlorophyll Content ◽  
Inhibitory Effect ◽  
Flower Bud ◽  
Chlorophyll Contents ◽  
Delayed Senescence ◽  
Sugar Response ◽  
Tulip Bulbs ◽  
Indole 3 Acetic Acid ◽  
Stem Segments

ABSTRACT The purpose of this study was to clarify the effect of sucrose on auxin-induced growth of stem excised from growing tulips and excised directly from cooled and not cooled bulbs, and on the growth of excised IV internode from growing plants in the presence of auxin. In all cases flower bud was replaced by IAA (indole-3- acetic acid, 0.1%, w/w in lanolin) and basal part of excised segments of stem was kept in distilled water or in solution of various sugars at different concentrations. IAA-induced growth of excised stems isolated from growing tulips was inhibited by sucrose at concentrations of 5.0% and 10.0%, but sucrose at 1.25% and 2.5% did not. Sucrose at all concentrations used evidently delayed senescence and increased chlorophyll contents in excised stems in the presence of IAA. Sucrose induced stiffing in isolated stems in the presence of IAA, and much less infective by pathogen in comparison to stem treated with IAA only. Mannitol and sorbitol at concentrations of 5.0% and 10.0% substantially inhibited IAA-induced growth of stem segments. Stem segments excised from cooled and not cooled tulip bulbs were more sensitive than those isolated from growing shoots due to application of sucrose and glucose; more inhibitory effect was observed. Sucrose at concentrations of 5.0% and 10.0% only slightly inhibited growth of IV internode treated with IAA and all concentrations of sucrose (1.25%, 2.5%, 5.0% and 10.0%) substantially increased chlorophyll content. The possible mode of actions of sucrose interacting with auxin to regulate stem growth is also discussed although sugar response is complicated by the fact that plants have multiple sugar-response pathways.

Corynebacterium oortii. [Descriptions of Fungi and Bacteria].

1973 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
Geographical Distribution ◽  
Storage Period ◽  
Vascular Bundles ◽  
Lower Epidermis ◽  
Tulipa Gesneriana ◽  
White Spots ◽  
Leaf Infection ◽  
Tulip Bulbs ◽  
Short Time ◽  
White Scale

Abstract A description is provided for Corynebacterium oortii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Tulipa gesneriana, the garden tulip. DISEASE: 'Geel-pok' (yellow pustule) of tulip bulbs and 'hels vuur' (hell-fire) of the leaves. Primary infection occurs on leaves, which show silver grey spots after a short time. These become up to about 5 mm diam. with brittle, easily cracked epidermis and disorganised-looking parenchyma within. Plants may also show leaves with areas in which the upper and lower epidermis is badly cracked, giving a characteristic rough look to the leaves. These plants show yellowish stem interiors that run down to the young growing bulbs. On bulbs the outermost white scale develops many tiny white spots which turn yellow and by the end of the storage period are yellow areas with raised tissue and ruptured outer skin. In section many vascular bundles are yellow. Less severely affected bulbs develop into stunted plants with leaves showing silvery streaks along veins. GEOGRAPHICAL DISTRIBUTION: Netherlands, England. TRANSMISSION: By planting out of infected bulbs, which may produce infected plants and in turn more infected bulbs; also from plant to plant in the field by leaf infection. The latter presumably in windy and wet conditions.

Sign in / Sign up

Export Citation Format

Share Document