- Type of paper
: Paper in book
Title:
- Type of paper
: Paper in journal
Title: Presence of serotonin in the embryo of Juglans regia var.
membranica
- Authors:
- Regula, Ivan (40614)
- Vidaković, Željka (177161)
- Jelenčić, Biserka (18375)
- Regula, Ivan (40614)
Journal: Acta Bot. Croat.
ISSN: 0365-0588
Volume: 50
Year: 1991
Pages: from 37 to 40
Number of references: 12
Language: engleski
Summary: Serotonin (5-hydroxytriptamine) was established in
methanolicextract of the mature embryo of Juglans regia var. membranica.The
biogenic amine from the extract was separated on AmberliteCG-50 ion
exchanger and detected by chromatographic,spectrophotometric and
spectrofluorimetric methods. By thismethods serotonin was detected in
quantity of 80 micrograms/gfresh weight.
The localization of serotonin was detected in the embryo by ahistochemical
reaction with p-dimethylaminobenzaldehyde in HCl,or with ninhydrin in
acetic acid.
Keywords: serotonin, 5-hydroxytriptamine, Juglans regia, biogenic amine
- Type of paper
: Paper in journal
Title: Presence of serotonin in the embryo of Juglans sieboldiana
Maxim.
- Authors:
- Regula, Ivan (40614)
- Vidaković, Željka (177161)
- Jelenčić, Biserka (18375)
Journal: Acta Bot. Croat.
ISSN: 0365-0588
Volume: 51
Year: 1992
Pages: from 37 to 40
Number of references: 12
Language: engleski
Summary: The presence of serotonin has been detected in
methanolicextracts of the mature embryo of Juglans sieboldiana Maxim.
Theamine from the extract was separated on the Amberlite CG-50 ionexchanger
and detected by chromatographic, spectrophotometric andspectrofluorimetric
methods. By these methods serotonin wasdetected in a quantity of 20 mg/g
fresh weight.
The localization of serotonin was detected in the embryo by ahistochemical
reaction with p-dimethylaminobenzaldehyde in HCl,or with ninhydrin in
acetic acid.
Keywords: Juglans sieboldiana, 5-hydroxytriptamine, serotonin
- Type of paper
: Paper in journal
Title: Presence of serotonin in vegetative organs of Aristolochia
clematitis L. (in press)
- Authors:
- Regula, Ivan (40614)
- Vidaković, Željka (177161)
- Jelenčić, Biserka (18375)
Journal: Acta Biocovica
Pages: from 0 to 0
Number of references: 24
Language: engleski
Summary: Serotonin (5-hydroxytriptamine) was detected in
methanolicextracts of leaves and steams of the species
Aristolochiaclematitis L. The biogenic amine from extracts was separated
onan Amberlite CG-50 ion exchanger and detected by chromatographicand
spectrophotofluorimetric methods. By these methods serotoninwas detected in
quantity of 2,6 micrograms/g fresh weight.
Keywords: Serotonin, 5-hydroxytriptamine, biogenic amine, Aristolochiaclematitis
- Type of paper
: Paper in journal
Title: Physiological activity of 5-hydroxytriptamine,
5-hydroxyindole-3-acetic acid and indole-3-acetic acid in some bioassay
systems
- Authors:
- Jelenčić, Biserka (18375)
- Vidaković, Željka (177161)
- Kolevska-Pletikapić, Branka (21740)
- Regula, Ivan (40614)
Journal: Periodicum Biologorum
Number: 0004
ISSN: 0031-5362
Volume: 0096
Year: 1994
Pages: from 00407 to 00409
Number of references: 12
Language: engleski
Summary: All these compounds affected root growth in Allium test,
but there was no effect on mitoses in root tips. 5-hydroxyindole- 3-acetic
acid and indole-3-acetic acid affected longitudinal growth of oat
coleoptiles, but barley coleoptiles elongated only in the presence of
indole-3-acetic acid. All three substances decreased peroxydase activity in
the extracts of oat and barley coleoptile sections. The effect of all three
indolic compounds on tobacco callus growth was also tested and
5-hydroxytriptamine did not show indole-3-acetic acid-like activity.
5-hydroxyindole-3-acetic acid showed such activity, but only in
concentration of 12x10-6 mol/l.
Keywords: 5-hydroxytriptamine, serotonin, 5-hydroxyindole-3-acetic acid, indole-3-acetic acid, bioassay, physiological activity
- Type of paper
: Summary in proceedings
Title: Increasing of serotonin content in seeds of Juglans
cinerea L. and Juglans nigra L. during ripening
- Authors:
- Vidaković, Željka (177161)
- Regula, Ivan (40614)
- Jelenčić, Biserka (18375)
Proceedings title: 1st Slovenian Symposium on Plant Physiology (with international participation)
Language: engleski
Year: 1993
ISBN/ISSN: 0000000000000
Pages: from 00000 to 00000
Meeting: 1st Slovenian Symposium on Plant Physiology (with International Participation)
Held: from 09/29/93 to 10/01/93
Summary: Serotonin (5-hydroxytriptamine) as a secondary plant
product may have a different function in plant tissue. It affects uptake of
ions, elongation of root cells and protection against predation. The
accumulation of serotonin in seeds of walnuts (Juglans cinerea and
Juglans nigra) is connected with the loss of moisture and vacuoles which
are replaced by protein bodies in the cells during the ripening period. To
prevent the concentration of ammonia from rising to toxic levels, the seeds
of walnuts reduce their ammonia content by synthesizing serotonin.
Methanolic extracts of cotyledons in four maturity stages was examined.
Serotonin from extracts was separated on ion exchanger Amberlite CG-50 and
detected by chromatographic, spectrophotometric and spectrofluorometric
methods. Increasing level of serotonin during ripening was established in
both species of walnuts. Serotonin was also in situ localized in cotyledons
of walnuts using two histochemical reagents: P-dimethylaminobenzaldehide in
chloric acid and ninhydrin in acetic acid.
Keywords: serotonin, 5-hydroxytriptamine, Juglans cinerea, Juglans nigra, ripening
- Type of paper
: Summary in proceedings
Title: Presence of serotonin in the embryo of shellbark hickory
(Carya laciniosa Loud. and its effect on growth
- Authors:
- Regula, Ivan (40614)
- Vidaković, Željka (177161)
- Jelenčić, Biserka (18375)
- Editors
- Šerman, Draško
- Šerman, Draško
Proceedings title: Zbornik priopćenja Četvrtog kongresa biologa Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-6241-00-5
Pages: from 00142 to 00143
Meeting: Četvrti kongres biologa Hrvatske (nije održan zbog ratne opasnosti)
Held: from 10/03/91 to 10/07/91
Summary: Serotonin (5-hydroxytriptamine) is wide-spread biogenic
amine in plant and animal organisms. Its auxin-like activity in barley
coleoptile test may be important in the course of germination. The present
work describes the detection of serotonin in the embryo of shellbark
hickory. In the extract we noticed two indole compounds. The first one was
tryptophan and the second compound had the same chromatographic
characteristics and absorption spectra as authentis sample of serotonin.
The amount of serotonin in the extract was measured spectrocolorymetrically
with 1-nitroso-2-naphtol reagent measured at 535 nm. It was established
that serotonin was present in the embryo in a quantity 1.3 micrograms/g
fresh weight. In the biotest serotonin affected the growth of barley
coleoptile segments and roots but less than IAA.
Keywords: serotonin, 5-hydroxytriptamine, Carya laciniosa
Other: Četvrti kongres biologa Hrvatske trebao se održati u
listopadu 1991. godine u Dubrovniku. Zbog početka ratnih operacija na
dubrovačkom području, Kongres je otkazan, a zbornik radova tiskan naknadno.
- Type of paper
: Summary in proceedings
Title: Physiological activity of 5-hydroxytriptamine,
5-hydroxyindole-3-acetic acid and indole-3-acetic acid in some bioassay
systems
- Authors:
- Jelenčić, Biserka (18375)
- Vidaković, Željka (177161)
- Kolevska-Pletikapić, Branka (21740)
- Regula, Ivan (40614)
- Editors
- Gomerčić, Hrvoje
Proceedings title: Peti kongres biologa Hrvatske (Zbornik sažetaka priopćenja)
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6241-01-3
Pages: from 00191 to 00191
Meeting: Peti kongres biologa Hrvatske s međunarodnim sudjelovanjem
Held: from 10/03/94 to 10/07/94
Summary: All these compounds affected root growth in Allium test,
but there was no effect on mitoses in root tips. 5-hydroxyindole-3-acetic
acid and indole-3-acetic acid affected longitudinal growth of oat
coleoptiles, but barley coleoptiles elongated only in the presence of
indole-3-acetic acid. All three substances decreased peroxydase activity in
the extracts of oat and barley coleoptile sections . The effects of all
three indolic compounds on tobacco callus growth was also tested and
5-hydroxytriptamine did not show indole-3-acetic acid-like activity.
5-hydroxyindole-3-acetic acid showed such activity, but only in
concentration of 12x10-6 mol/l.
Keywords: 5-hydroxytriptamine, 5-hydroxyindole-3-acetic acid, indole-3-acetic acid, Allium test, oat coleoptiles, barley coleoptles, tobacco callus
- Type of paper
: M.A.
Title: The presence of serotonin in seeds of walnuts and its
physiological effect on growth and differentiation
Faculty: Prirodoslovno-matematički fakultet Zagreb
Date of defense: 11/18/93
Language: hrvatski
Number of pages: 65
Summary: The accumulation of serotonin in seeds of walnuts is
connectedwith the loss of moisture and vacuoles which are replaced
byprotein bodies in the cells during the ripening period. Toprevent free
ammonia rising to a toxic level, the seeds ofwalnuts reduce its content by
synthesizing serotonin. Seeds ofblack walnut (Juglans nigra) and butternut
(Juglans cinerea) werecollected in four maturity stages. In both species
increasinglevels of serotonin during ripening period was found.
Physiological activity of three indolic compounds -
serotonin(5-hydroxytriptamine), 5-hydroxyindole-3-acetic acid
andindole-3-acetic acid was investigated in some biotests.
Keywords: serotonin, 5-hydroxytriptamine, 5-hydroxyindole-3-acetic acid,indole-3-acetic acid, Juglans nigra, Juglans cinerea, blackwalnut, butternut, Allium test, test of longitudimal growth ofoat coleoptile, peroxydase, Nicotiana tabacum, tobacco callus
- Type of paper
: Mentorship
Title: The presence of serotonin in seeds of walnuts and its
physiological effect on growth and differentiation
Faculty: Prirodoslovno-matematički fakultet Zagreb
Mentor: REGULA IVAN
Date of defense: 11/18/93
Number of pages: 65
Author: Vidaković mr Željka
Degree level: M.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno-matematički fakultet Zagreb
Mentor: REGULA IVAN
Date of defense: 04/30/92
Number of pages: 00075
Author: Hudec (studentica) Sunčica
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno-matematički fakultet Zagreb
Mentor: REGULA IVAN
Date of defense: 06/24/92
Number of pages: 00047
Author: Hudeček Vesna
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno-matematički fakultet Zagreb
Mentor: REGULA IVAN
Date of defense: 05/28/93
Number of pages: 00093
Author: Roščak Renata
Degree level: D.A.
- Type of paper
: Radio broadcast
Title: Atmospheric nitrogen fixation
- Authors:
- Regula, Ivan (40614)
Radio station: Zagreb, Radio 101
Year: 1993
Language: hrvatski
Summary: Nitrogen is very important element for growth and
development andoften limits plant growth. The fact that nitrogen
isfrequently deficient is somewhat enigmatic since nitrogen is themost
abundant element in the atmosphere making up aproximately78%. Before the
nitrogen of the atmosphere which occur asmolecular nitrogen, can be used by
living organisms, it must bereduced, usually to ammonia. Simbiotic nitrogen
fixing organismsof the genus Rhizobium live in nodules on legumes
roots.Reduction of molecular nitrogen to ammonia in nodules catalyzesenzyme
called nitrogenase. The multistep reduction is beleived toproceed from
molecular nitrogen to diimide, hydrazine andultimately ammonia, using two
electrons for each step.
Keywords: nitrogen fixation, Rhizobium
- Type of paper
: Manuscript
Title: Increasing of serotonin content in seeds of Juglans
cinerea L. and Juglans nigra L. during ripening
- Authors:
- Vidaković, Željka (177161)
- Regula, Ivan (40614)
- Jelenčić, Biserka (18375)
Language: engleski
Summary: Serotonin (5-hydroxytriptamine) as a secundary plant
product may have a different function in plant tissue. The accumulation of
serotonin in seeds of walnuts is connected with a loss of moisture and
vacuoles which are replaced by protein bodies in the cells during the
ripening period. To prevent the concentration of ammonia from rising to
toxic levels, the seeds of walnuts reduce their ammonia content by
synthesizing serotonin. Methanolic extracts of black walnut's and
butternut's cotyledones in four maturity stages was examined. Serotonin
from extracts was separated on ion-exchanger Amberlite CG-50 and detected
by chromatographic and spectrofluorometric methods. Increasing level of
serotonin during ripening was established in both species of walnuts.
Serotonin was also in situ localized in cotyledons of walnuts using two
histochemical reagents: p-dimethylaminobenzaldehide in chloric acid and
ninhydrin in acetic acid.
Keywords: serotonin, 5-hydroxytriptamine, Juglans nigra, Juglans cinerea
