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Assessing genetic diversity of Tecomella undulata (Sm) - an endangered tree species using amplified fragment length polymorphisms-based molecular markers
Get PDFTecomella undulata is an important agro-forestry tree in the
western parts of India, which has been included in the list of
endangered plant species due to over exploitation. There is an
urgent need to formulate appropriate conservation and
breeding strategies to save this versatile tree. Quantification of
genetic diversity in the existing populations of T. undulata
prevalent in India, is an essential first step towards this
objective. The present work was undertaken to investigate the
utility of amplified fragment length polymorphism (AFLP)
markers in the assessment of genetic diversity and phenetic
relationship among 42 T. undulata plants collected from
different regions of India. Eight AFLP primer combinations
generated a total of 338 bands across the 42 T. undulata
accessions screened. On an average, 42 AFLP fragments were
amplified per reaction. Of the total 338 AFLP fragments, 71.7%
was polymorphic across all the accessions. From the AFLP data,
a similarity matrix based on Jaccard's coefficient was calculated
which was used for constructing a phenetic dendrogram using
UPGMA analysis. T. undulata accessions represented high
levels of genetic variation as indicated by GS values ranging
from 0.721 to 0.83, at which 42 T. undulata accessions
grouped together. The pattern of grouping in the phenogram
was highly consistent as indicated by high values of cophenetic
correlation (r = 0.87, P = 1) as also by high bootstrap
values at the key nodes. Principal correspondence analysis also
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Page 1 of 5 Scopus - Current Science: Assessing genetic diversity of Tecomella undulata (Sm.) - An endangered...
02/04/2008 http://www.scopus.com/scopus/record/display.url?view=basic&eid=2-s2.0-3
revealed that T. undulata accessions were scattered on the
plot. Based on our study, it may be concluded that there is a
high level of genetic diversity in T. undulata accessions
analysed, which may be attributed to its out-crossing nature.
Our study may be useful in identifying diverse genetic stocks of
T. undulata, which may then be conserved on priority basis.
Author Keywords
AFLP; Conservation; Genetic diversity; Molecular makers;
Tecomella undulata
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1. (1982) The Wealth of India, 10, pp. 134-136.
Publications and Information Directorate, CSIR, New Delhi, Anon
2. Jindal, S.K., Kackar, N.L., Solanki, K.R.
Evaluation of Tecomella undulata (Sm.) SEEM germplasm
from western Rajasthan in situ
(1985) Trans. Indian Soc. Desert Technol. Univ. Cent. Desert
Stud, 10, pp. 33-37.
3. Jindal, S.K., Solanki, K.R., Kackar, N.L.
Phenology and breeding systems of Rohida (Tecomella
undulata (Sm.) SEEM)
(1985) Indian J. For, 8, pp. 317-320.
4. Jindal, S.K., Kackar, N.L., Solanki, K.R.
Germplasm collection and genetic variability in Rohida
(Tecomella undulata (Sm.) Seem) in western Rajasthan
(1987) Indian J. For, 10, pp. 52-55.
5. Rao, A., Kiran-Bala, V., Lahiri, A.N., Bala, K.
Influence of trees on microorganisms of aridisol and its
fertility
(1989) Indian For, 115, pp. 680-683.
6. Azam, M.M.
Anti-HIV agents and other compounds from Tecomella
undulata
(1999) Orient. J. Chem, 15, pp. 375-377. Cited 2 times.
7. Dushyent, G., Bohra, A.
Toxic effects of various plant part extracts on the causal
organism of typhoid fever
(2000) Curr. Sci, 78, pp. 780-781. Cited 4 times.
8. Ahmad, F., Alam Khan, R., Rasheed, S.
Preliminary screening of methanolic extracts of Celastrus
paniculatus and Tecomella undulata for analgesic and
antiinflammatory activities
(1994) Journal of Ethnopharmacology, 42 (3), pp. 193-198. Cited
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doi: 10.1016/0378-8741(94)90085-X
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An assessment of threatened plants of India
(1983) Botanical Survey of India, Howrah, p. 334.
Page 2 of 5 Scopus - Cur
Signal Durations and local Richter magnitudes in northeast india: An empirical approach
Get PDFTwenty four analog seismic stations are operated by the
Regional Research Laboratory (Jorhat), National Geophysical
Research Institute (Hyderabad) and by the India
Meteorological Department (IMD) in the Northeastern region
(NER) of India. 8000 seismograms of 1992 shallow (5-30km)
earthquakes recorded by these stations during the period from
January 1985 to December 1999, have been used to establish
relationships between signal durations and the local Richter
magnitudes (ML). In order to obtain the empirical relations for
the determination of duration magnitudes (MD), signal duration
estimates have been fitted using regression analysis to models
of the form Model-I: MD = C0 + C1 Log10 (S.D) + C2 Δ + C3 h
Model-II: MD = C0 + C1 Log10 (S.D) + C2 Δ + C3 h + C4 [Log10
(S.D)]
(S.D)2, where S.D is the signal duration in seconds, Δ
epicentral distance in degree and h focal depth in km. The
models yielded duration magnitudes at each of the 24 stations
having standard deviations as low as 0.07. For these stations,
station factors are obtained by finding the average of the
deviations of network magnitude (i.e. mean estimate of station
magnitudes for each earthquake, denoted by MD A) from
station magnitudes (MD) for the earthquake events in NER.
Over - and under - estimations of station magnitudes with
respect to ML are also determined for each station. It has been
observed that the estimates of MD (A) scatter up to about
0.8units with respect to ML for both the models. Application of
these factors reduced scatter down to ± 0.25 units for both the
models. © Geol. Soc. India
Dicarbonylrhodium(I) complexes of functionalized pyridine ligands and their catalytic activities
Get PDFReactions of dimeric complex [Rh(CO)2Cl]2 (1) with pyridine ester ligands methyl picolinate (a), methyl nicotinate (b), methyl isonicotinate
(c),ethylpicolinate(d),ethylnicotinate(e)andethylisonicotinate(f)inthe1:2molarratioaffordthecomplexesofthetype[Rh(CO)2ClL](1a–f).
Thecomplexes1a–fexhibittwoequallyintenseν(CO)bandsintherange1990–2091cm−1 indicatingcis-dispositionofthetwoterminalcarbonyl
groups.Thecomplexes1aand1dundergopartialdecarbonylationreactioninsolutiontogivethecorrespondingchelatedmonocarbonylcomplexes
[Rh(CO)Cl(methylpicolinate)](1a)and[Rh(CO)Cl(ethylpicolinate)](1d),respectively.Thecomplexes1a–fundergooxidativeadditionreaction
withdifferenttypesofelectrophileslikeCH3I,C2H5I,C6H5CH2ClandI2 toyield[Rh(CO)(COCH3)ClIL](2a–f),[Rh(CO)(COC2H5)ClIL](3a–f),
[Rh(CO)(COCH2C6H5)Cl2L] (4a–f) and [Rh(CO)ClI2L] (5a–f) complexes, respectively. The complexes have been characterized by elemental
analysis,IRand 1HNMRspectroscopy.Thetimetakenbythedifferentcomplexes1a–fforthecompletionofoxidativeadditionreactionsofCH3I
are different and the complex 1f took the shortest time while the complex 1b required the longest time. The catalytic activity of the complexes
[Rh(CO)2ClL] (1) in carbonylation of methanol is higher (TON=844–1251) than the well known [Rh(CO)2I2]− species (TON=653).
© 2006 Elsevier B.V. All rights reserved
Effect of bioformulation in reclamation of crude oil contaminated soil and determination of metal contents in plants grown after reclamation
Get PDFCrude oil is of organic origin and is an extremely complex
structure of hydrocarbons. Besides carbon, hydrogen,
nitrogen and sulphur many other elements are present in
crude oil. In oil fields, during drilling, gathering,
transporting or in some other operations, some quantity
of the crude oil gets spilled over the neighboring areas.
The spilled crude oil affects the bio-chemical nature of
the soil. As a result no vegetation occurs in those areas.
Therefore, a study was made with an objective to revive
the soil condition for vegetation development.
Biochemical nature of soil showed that soil is highly
alkaline which is not suitable for seed germination, root
and shoot development. Essential elements including
heavy metals are detected in the contaminated soil
samples. Further, beneficial microbes like nitrogen fixers,
phosphate solubilizers, sulphur oxidizers and cellulose
degraders and their activities which play a major role for
plant growth and soil fertility are recorded less in such
contaminated soils. As per the nature of soil sample a
bioformulation was developed for reclamation of soil for
seed germination and plant growth. Elements recorded in
the soil were detected in various parts of the plant
Systematics and diversities of Cinnamomum species used as "Cinnamon" species in North East India
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Iodine a simple, effective and inexpensive catalyst for the synthesis of substituted coumarins
Get PDFMolecular iodine is developed as an e
Synthesis of 3,4,5,6,7,8-hexahydro-1-substituted phenyl isoquinoline and 3,4,5,6,7,8-hexahydro-1-substituted benzyl isoquinoline
Get PDFIsoquinoline derivatives are obtained from amides using
AlCl3-KI in acetonitrile solvent. This cyclo dehydrating
Lewis acid produced no side product and yield is above
95% isoquinoline derivative at room temperature