Magnitude of hybrid vigor retained in double haploid lines of some heterotic rice hybrids
Sixty one double haploid (DH) lines were evaluated
for yield components and yield and compared with
the three corresponding hybrids from which they were derived
through anther culture. Analysis of a 6x6 diallel experiment
led to the selection of these hybrids based on their
high heterosis and revealed the nature of gene action of the
characters under evaluation. The DH lines along with the
hybrids and parents were planted following a simple lattice
design with two replications. The results show...
A chloroplast-localized and auxin-induced glutathione S-transferase from phreatophyte Prosopis juliflora confer drought tolerance on tobacco
Plant growth and productivity are adversely affected by various abiotic stress factors. In our previous study, we used Prosopis juliflora, a drought-tolerant tree species of Fabaceae, as a model plant system for mining genes functioning in abiotic stress tolerance. Large-scale random EST sequencing from a cDNA library obtained from drought-stressed leaves of 2-month-old P. juliflora plants resulted in identification of three different auxin-inducible glutathione S-transferases. In this paper,...
Species identification in seven small millet species using polymerase chain reaction – restriction fragment length polymorphism of trnS-psbC gene region
The chloroplast trnS-psbC gene regions from total genomic DNA of 119 accessions from seven small millet
species were amplified by polymerase chain reaction (PCR) and digested with eight restriction enzymes individually as
well as in combinations of two enzymes to generate restriction fragment length polymorphism (PCR–RFLP). PCR–
RFLP with individual enzymes revealed polymorphism between only some species. However, all the species could be
distinguished by using a combination of two enzymes,...
A diurnally regulated dehydrin from Avicennia marina that shows nucleo-cytoplasmic localization and is phosphorylated by Casein kinase II in vitro
Dehydrins have a key role in protecting plants from dehydration stress. We report here the isolation of
two cDNAs coding for the same dehydrin, AmDHN1 and AmDHN1a from salt stressed leaves of Avicennia
marina (Forsk.) Vierh. by EST library screening. AmDHN1 was found to contain a retained intron that was
absent in AmDHN1a. AmDHN1 expression in the context of various environmental stresses was investigated.
In leaves, AmDHN1 shows a diurnal pattern of regulation and is induced only by mannitol...
Capacity Building is the Key to Achieving Appropriate Biosafety Protocols
Over the last two centuries, science, technology and public policy have played a significant role in terms of helping farmers to increase agricultural productivity. Today, we are entering the new millennium with a number of advanced tools at hand. Among them, biotechnology is of major importance. The progress in the field of molecular biology, microbiology, and genetic engineering in the last two decades has been enormous.
Isolation and Characterization of an Atypical LEA Protein Coding cDNA and its Promoter from Drought-Tolerant Plant Prosopis juliflora
Plant growth and productivity are adversely affected by various abiotic and biotic stress factors. Despite the wealth of information on abiotic stress and stress tolerance in plants, many aspects still remain unclear. Prosopis juliflora is a hardy plant reported to be tolerant to drought, salinity, extremes of soil pH, and heavy metal stress. In this paper, we report the isolation and characterization of the complementary DNA clone for an atypical late embryogenesis abundant (LEA) protein (Pj...
Nucleotide Sequence of a Truncated cDNA (Accession No. AF093108) Encoding a H3-Like Histone Protein from the Bryophyte Tortula ruralis. R. Joel Duff, Melvin J. Oliver, and Andrew J. Wood*. Department of Plant Biology, Southern Illinois University- Carbondale, Carbondale, Illinois 62901–6509 (R.J.D., A.J.W.); and Plant Stress and Water Conservation Unit, United States Department of Agriculture-Agricultural Research Service, Route 3, Box 215, Lubbock, Texas 79401 (M.J.O.).
Characterization of a non-reducing polyketide synthase gene from lichen Dirinaria applanata
Lichens are known to produce a variety of secondary metabolites including polyketides that have diverse biological role(s). The biosynthesis of fungal polyketides is governed by type I polyketide synthases (PKS),
enzymes with a multidomain structure, including the b-ketoacyl synthase (KS), acyl transferase (AT),
ketoreductase (KR), dehydratase (DH), enoyl reductase (ER) and acyl carrier protein (ACP) domains.
Established soredial cultures of Dirinaria applanata (Fée) producing atranorin and...
Molecular phylogeny of mangroves 11. Intraand inter-specif ic variation in Avicennia revealed by RAPD and RFLP markers
Random amplified polymorphic DNA (RAPD) and restriction fragment length polymorphism (RFLP) markers were
used to estimate intra- and inter-specific variation in three species of an exclusive mangrove genus, Avicennia. Intrapopulation
polymorphism among the 10 populations of Avicennia marina, as measured by percentage of polymorphic RAPDs, varied
between 17.8 and 38.9%, with a standard deviation of 7.28, and the coefficient of variation was 26.5%. Polymorphism in
Avicennia ofJicinalis (...
Isolation and characterization of photosystem 2 PsbR gene and its promoter from drought-tolerant plant Prosopis juliflora
Prosopis juliflora is a hardy plant tolerant to drought, salinity, extremes of soil pH, and heavy metal stress. We isolated and characterized a photosystem 2 (PS2) gene PsbR (Pj PsbR) and its promoter. Northern analysis for Pj PsbR in P. juliflora leaves under 25 % polyethylene glycol stress showed steady decrease in transcript level at 12, 24, and 48 h after stress application. Under 90 mM H2O2 stress, transcript level dropped drastically at 12 h, but increased again compared to the control at...