mTERF Gene family in plants

1. CHOUDHARY CHARAN SINGH
UNIVERSITY MEERUT 250004
TOPIC- mTERF Gene family
Submitted by:
Devendra Kumar
Shreya baranwal
M.sc. Ag. 2nd SEM
Submitted to:
Dr. Vinay Panwar
Department of Genetic and
plant breeding
ccs university meerut

2. mTERF Gene Family -
Plant mitochondrial
transcription termination
factor gene family

3.  Plant mitochondrial transcription termination factor
(mTERF) family regulates organellar gene expression
(OGE) and is functionally characterized in diverse.
 however limited data are available in crops about its
function.
 Only 60 mTERF have identify in barley
genome(hvmTERF).

4.  hvmTERF gene family are categories in 9 subfamily.
 hvmTERF classify based on phylogenetic analysis.
 Halves of hvmTERF are belonging from subfamily IX.
 Expression analysis suggested that many hvmTERF may play
important role in barley development(seedling,leaves,and
developing inflosence)& abiotic stress (cold, salt, metal ion
etc).
 hvmTERF21 and hvmTERF23 were significant induced by
various stresses or phytoharmone treatment.

5.  mTERF protein family were firstly characterized in animal
mitochondria were involved in mitochondrial transcription,
translation, DNA Replication.
 In a study of comprehensive database search yielded 31
potential mTERF genes in maize (Zea mays L.).
 Its 31 mTERF genes are classify in IX main group based on
phytogenic analysis.
 IXth group represents the mitochondrial and species-specific
clade that diverge from other groups.

6.  Tendom and segmental duplication both contributed to
expension of the mTERF gene family in maize genome.
 Comprehensive expression Analysis of these genes using
microarray data and RNA sequence data Revealed that these
genes exhibit a variety of expression patterns.
 After conducting of many environmental experiments at the
stage of seedling eg: exposed to light/dark, salts and plant
harmone etc. It is revealed that various important roles of
maize mTERF genes in light acclimilation and stress related
response.

7.  After experiments on maize and barley many experiments
conducted in the rice crop and V14 mTERF gene was
identified by fine mapping in rice.
 Real time PCR indicates that V14 mTERF encodes a
chloroplastic protein V14 expression lacks thermo-sensitivity.
 Based on research data revealed a critical role of V14 In
chloroplast development.
 SOLDAT10, the first mTERF characterised in Higher plant
Participate in stress acclimilation response and affects the
abundance of 16s and 23s rRNA and clp p protease mRNA in
chloroplast.

8.  V14 is a chloroplastic protein criticallto early stage of leaf
development.
 V14 locus have 162kb region on chromosome 7.
 This V14 mutant develops albinism in the first two true leaves
at 25˚C and returns green there after.

9. Thank you