|
 Project abstract [back to TOP  ]
Epiphysis plays a controller role of daily and
seasonal rhythms in most species; in mammals, melatonin secretor rhythm is
controlled by the suprachiasmatic nucleus, through the somatic nervous system
ways. In birds, pineal gland contains a circadian self-maintained oscillator
and several input channels which synchronize the inner biological clock,
inclusively through straight light sensitivity. A few input channels, of
physical kind (light, temperature, magnetic field) and of biochemical type
(vip, norepinephrine) influencing melatonin releasing, function in vitro,
representing an appropriate study model of the circadian biological clock.
Melatonin and other indolic hormones synthesis occurs in birds in epiphysis,
retina; same biosynthesis pathways exist in lateral eyes, proving that
primordial function of melatonin relates to photoreception. Pineal gland of
birds comprises a circadian oscillator which plays a main role in temporal
organizing of cerebral functions. Secretion of pineal indols occurs under
high cyclic rhythms, which seems to be essentially endogenous, modulated by
l/d succession and temperature. Circadian clock used by each avian
pinealocyte to regulate melatonin synthesis transcription is also daily
rhythmically expressed through l/d and d/d cycle, both in vivo and in vitro.
In order to adapt organism to external environment conditions, the pineal
gland, through its hormones, does not act straightly toward gonads but onto
the brain and contributes to cerebral functions adaptation to the
environmental conditions, the reproduction activity consisting only a side of
this process. Pineal gland, by melatonin synthesis, is in fact a
photoperiodic translator, which mediates the reproduction function
seasonality. Melatonin involvement within the hypothalamic-hypophyseal–gonadal
axis could be proved by high levels associated to low gonadotropins
secretion, while decrease in melatonin secretion activates the
hypothalamic-hypophyseal–gonadal axis.
Research team [back to TOP ]
|
Name
|
Scientific/didactic title
|
Hired by
|
Field of
competence
|
Contact
|
|
Paul Corneliu BOIŞTEANU
|
Prof. dr.
|
U.S.A.M.V. Iaşi
|
Animals physiology
Morphophysiological basis of the animal productions
Food chain biosafety
|
paulb@uaiasi.ro
|
| Ioan
VACARU-OPRIŞ
|
Prof. dr. |
U.S.A.M.V. Iaşi |
Poultry husbandry technologies
Poultry productions
Artificial incubation |
opris_i@uaiasi.ro
|
|
Corneliu COTEA
|
Prof. dr.
|
U.S.A.M.V. Iaşi
|
Animal cytology
Animal histology and embryology
Histochemistry
|
cvcotea@uaiasi.ro
|
|
Marius Giorgi USTUROI
|
Prof. dr.
|
U.S.A.M.V. Iaşi
|
Poultry husbandry technologies
Poultry productions
Artificial incubation
|
umg@uaiasi.ro
|
|
Roxana LAZĂR
|
Asist.
dr.
|
U.S.A.M.V. Iaşi
|
Animals physiology
Animals anatomy and histology
|
lazarrxn@yahoo.com
|
|
Răzvan RADU-RUSU
|
Asist. dr.
|
U.S.A.M.V. Iaşi
|
Poultry husbandry technologies
Poultry productions
|
rprobios@yahoo.com
|
Young researchers involvement
degree [back to TOP ]
|
Year
|
Young researchers
|
Activities
|
Tasks
accomplishment
|
Published
papers
|
|
2009
|
Asist. Dr. LAZĂR Roxana
|
Biological material
sampling, as required by lab assays
Hematological and biochemical assessments on hens, prior to sexual
maturity onset.
Monitoring of microclimate parameters (lighting
schedule, light intensity, temperature) and of flock health status (morbidity,
mortality).
|
accomplished
|
1. Boişteanu P.C., Usturoi M.G., Roxana Lazăr,
2009 - Haematological
characterization of reproductive status in laying hens by age. Scientific
Papers, Bucureşti, ISSN 1224-429
|
|
2010
|
Asist. Dr. LAZĂR Roxana
|
Biological material
sampling, as required by lab assays
Hematological and biochemical assessments on hens, during laying cycle.
Monitoring of microclimate parameters (lighting
schedule, light intensity, temperature) and of flock health status (morbidity,
mortality).
|
accomplished
|
1. Boişteanu P.C., M.G.Usturoi, Roxana Lazăr,
B.V.Avarvarei, 2010 – Haematological
Characterization of Reproductive Status at Laying Hens by Age. World
Academy of Science Engineering and Technology, ISSN 2070-3724,Tokyo, Japan
2. Boişteanu P.C., M.G.Usturoi,
Roxana Lazăr, B.V.Avarvarei, 2010 – Changes
of Poultry meat Chemical Composition, in Relationship with, Lighting
Schedule. World Academy of Science Engineering and Technology, ISSN
2070-3724, Tokyo, Japan
|
|
2009
|
Asist.dr. RADU-RUSU Răzvan
|
Monitoring of microclimate parameters (lighting
schedule, light intensity, temperature) and of flock health status (morbidity,
mortality), prior to laying onset.
|
accomplished
|
|
|
2010
|
Asist.dr. RADU-RUSU Răzvan
|
Monitoring of microclimate parameters (lighting
schedule, light intensity, temperature) and of flock health status (morbidity,
mortality) during laying cycle.
Eggs yield assessment.
|
accomplished
|
1. Usturoi, M.G.,
Boişteanu, P.C., Radu-Rusu, R.M., Pop, I.M., Doliş, M.G. and Usturoi, A., 2010-Productive Response of Certain Laying
Hens Hybrids, Reared Within Various Farming Systems. 61th Annual
Meeting of the European Association for Animal Production. Book of
Abstracts, pg. 251. Wageningen Academic Publishers, The Netherlands. ISBN
978-90-8686-152-1; e-ISBN: 978-90-8686-708-0; ISSN 1382-6077.
|
Goals and activities within the
project [back to TOP ]
|
Year
|
Goals
|
Associated
activities
|
Fulfillment degree
|
|
totally
|
partially
|
unaccomplished
|
|
2009
|
1
|
Knowledge of fowl pineal secretor
functions prior to sexual maturity reaching
|
Hematological
and biochemical assessments related to metabolic profile establishing.
|
x
|
|
|
|
Histological
studies on pineal gland and retina.
|
x
|
|
|
|
2
|
Knowledge of fowl reproductive
status prior to sexual maturity reaching
|
Hematological
and biochemical assessments.
|
x
|
|
|
|
Hormonal
assessments.
|
x
|
|
|
|
Histological
studies on reproductive system.
|
x
|
|
|
|
3
|
Monitoring of technological
parameters within poultry houses, prior to flock sexual maturity reaching
|
Microclimate
parameters (lighting schedule, light intensity, temperature).
|
x
|
|
|
|
Health
status (morbidity, mortality).
|
x
|
|
|
|
2010
|
1
|
Knowledge of adult fowl pineal
secretor functions (during laying cycle)
|
Hematological and biochemical
assessments related to metabolic profile establishing.
|
x
|
|
|
|
Histological studies on pineal
gland and retina.
|
x
|
|
|
|
2
|
Knowledge of adult fowl
reproductive status (during laying cycle)
|
Hematological and biochemical
assessments.
|
x
|
|
|
|
Hormonal assessments.
|
x
|
|
|
|
Histological studies on
reproductive system.
|
x
|
|
|
|
3
|
Monitoring of technological
parameters within poultry houses, at adult flock (during laying cycle)
|
Microclimate parameters (lighting
schedule, light intensity, temperature).
|
x
|
|
|
|
Health status assessment
(morbidity, mortality).
|
x
|
|
|
|
Eggs yield evaluation.
|
x
|
|
|
|
4
|
Relationship between fowl light
exposure and the functionality of the hypothalamic-hypophyseal–gonadal axis
|
Assessment of melatonin levels
during different light exposure schedules.
|
x
|
|
|
|
Histological alterations of the
pineal gland, produced by different lighting patterns.
|
x
|
|
|
|
Microclimate parameters (lighting
schedule, light intensity, temperature).
|
x
|
|
|
|
Hormonal assessments.
|
x
|
|
|
|
Histological studies on
reproductive system.
|
x
|
|
|
|
2011
|
1
|
Knowledge of adult fowl pineal
secretor functions (at the end of laying cycle)
|
Hematological and biochemical
assessments related to metabolic profile establishing.
|
|
|
|
|
Histological studies on pineal
gland and retina
|
|
|
|
|
2
|
Knowledge of adult fowl
reproductive status
(at the end of laying cycle)
|
Hematological and biochemical
assessments.
|
|
|
|
|
Hormonal assessments.
|
|
|
|
|
Histological studies on
reproductive system.
|
|
|
|
|
3
|
Monitoring of technological
parameters within poultry houses, at adult flock (at the end of laying
cycle)
|
Microclimate parameters (lighting
schedule, light intensity, temperature).
|
|
|
|
|
Health status assessment
(morbidity, mortality).
|
|
|
|
|
Eggs yield evaluation.
|
|
|
|
|
4
|
Final analysis of the achieved
results
|
Causal debate of the achieved
results.
|
|
|
|
|
Elaboration of the conclusions
issued from accomplished researches.
|
|
|
|
|
Final results submission.
|
|
|
|
Achieved results [back to TOP ]
* during 2009:  Research report (you need Adobe Reader in order to view file)
* during 2010: Research report (you need Adobe Reader in order to view file)
Published articles [back to TOP ]
* during
2010: Published papers (you need Adobe Reader
in
order to view file)
|
|
