Analysis of defense genes expression in maize upon infection with peronosclerospora sorghi

Y. Sireesha, R. Velazhahan

Research output: Contribution to journalArticle

Abstract

Downy mildew, caused by Peronosclerospora sorghi is one of the important diseases affecting maize (Zea mays L.) production worldwide. Several downy mildew resistant maize lines have been identified. However, variability in the degree of resistance among maize genotypes to P. sorghi has been reported. In the present study the molecular basis of resistance of maize to P. sorghi was studied by using differential-display reverse transcription PCR (DDRT-PCR) technique. Maize seedlings of downy mildew resistant (MAI 756) and susceptible (CM 500) cultivars at two-leaf stage were inoculated with P. sorghi and leaf samples were collected at 0, 3 and 5 days after inoculation and analyzed for differentially expressed cDNAs using cDNA-RAPD approach. A total of 17 cDNA fragments corresponding to transcripts that showed alterations during the defence response of maize to P. sorghi were identified. Genes involved in signal transduction and several genes with unknown functions were found to be upregulated in maize after infection by P. sorghi. Among 35 random primers tested, OPD-05 has identified a differentially expressed cDNA coding for serine/threonine kinase protein in resistant maize genotype. Constitutive and high level expression of serine/threonine kinase gene was observed in the uninoculated plants of resistant genotype, whereas no expression of this gene was observed in uninoculated plants of susceptible genotype. However, the transcript level was induced 3 days after inoculation in the susceptible genotype and slightly reduced 5 days after inoculation. This study represents the first identification of maize serine/threonine kinase gene that is upregulated following infection by P. sorghi.

Original languageEnglish
Pages (from-to)272-283
Number of pages12
JournalCereal Research Communications
Volume45
Issue number2
DOIs
Publication statusPublished - Jun 1 2017

Fingerprint

Peronosclerospora sorghi
Zea mays
Gene Expression
gene expression
corn
Infection
infection
downy mildew
Genotype
Protein-Serine-Threonine Kinases
threonine
genotype
serine
Complementary DNA
Genes
phosphotransferases (kinases)
genes
protein kinases
Seedlings
signal transduction

Keywords

  • Differential display RT-PCR
  • Downy mildew
  • Peronosclerospora sorghi
  • Transcriptomics
  • Zea mays

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Genetics

Cite this

Analysis of defense genes expression in maize upon infection with peronosclerospora sorghi. / Sireesha, Y.; Velazhahan, R.

In: Cereal Research Communications, Vol. 45, No. 2, 01.06.2017, p. 272-283.

Research output: Contribution to journalArticle

@article{980716f531d4436189a3e6f7fd915932,
title = "Analysis of defense genes expression in maize upon infection with peronosclerospora sorghi",
abstract = "Downy mildew, caused by Peronosclerospora sorghi is one of the important diseases affecting maize (Zea mays L.) production worldwide. Several downy mildew resistant maize lines have been identified. However, variability in the degree of resistance among maize genotypes to P. sorghi has been reported. In the present study the molecular basis of resistance of maize to P. sorghi was studied by using differential-display reverse transcription PCR (DDRT-PCR) technique. Maize seedlings of downy mildew resistant (MAI 756) and susceptible (CM 500) cultivars at two-leaf stage were inoculated with P. sorghi and leaf samples were collected at 0, 3 and 5 days after inoculation and analyzed for differentially expressed cDNAs using cDNA-RAPD approach. A total of 17 cDNA fragments corresponding to transcripts that showed alterations during the defence response of maize to P. sorghi were identified. Genes involved in signal transduction and several genes with unknown functions were found to be upregulated in maize after infection by P. sorghi. Among 35 random primers tested, OPD-05 has identified a differentially expressed cDNA coding for serine/threonine kinase protein in resistant maize genotype. Constitutive and high level expression of serine/threonine kinase gene was observed in the uninoculated plants of resistant genotype, whereas no expression of this gene was observed in uninoculated plants of susceptible genotype. However, the transcript level was induced 3 days after inoculation in the susceptible genotype and slightly reduced 5 days after inoculation. This study represents the first identification of maize serine/threonine kinase gene that is upregulated following infection by P. sorghi.",
keywords = "Differential display RT-PCR, Downy mildew, Peronosclerospora sorghi, Transcriptomics, Zea mays",
author = "Y. Sireesha and R. Velazhahan",
year = "2017",
month = "6",
day = "1",
doi = "10.1556/0806.45.2017.010",
language = "English",
volume = "45",
pages = "272--283",
journal = "Cereal Research Communications",
issn = "0133-3720",
publisher = "Cereal Research Non-Profit Company",
number = "2",

}

TY - JOUR

T1 - Analysis of defense genes expression in maize upon infection with peronosclerospora sorghi

AU - Sireesha, Y.

AU - Velazhahan, R.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - Downy mildew, caused by Peronosclerospora sorghi is one of the important diseases affecting maize (Zea mays L.) production worldwide. Several downy mildew resistant maize lines have been identified. However, variability in the degree of resistance among maize genotypes to P. sorghi has been reported. In the present study the molecular basis of resistance of maize to P. sorghi was studied by using differential-display reverse transcription PCR (DDRT-PCR) technique. Maize seedlings of downy mildew resistant (MAI 756) and susceptible (CM 500) cultivars at two-leaf stage were inoculated with P. sorghi and leaf samples were collected at 0, 3 and 5 days after inoculation and analyzed for differentially expressed cDNAs using cDNA-RAPD approach. A total of 17 cDNA fragments corresponding to transcripts that showed alterations during the defence response of maize to P. sorghi were identified. Genes involved in signal transduction and several genes with unknown functions were found to be upregulated in maize after infection by P. sorghi. Among 35 random primers tested, OPD-05 has identified a differentially expressed cDNA coding for serine/threonine kinase protein in resistant maize genotype. Constitutive and high level expression of serine/threonine kinase gene was observed in the uninoculated plants of resistant genotype, whereas no expression of this gene was observed in uninoculated plants of susceptible genotype. However, the transcript level was induced 3 days after inoculation in the susceptible genotype and slightly reduced 5 days after inoculation. This study represents the first identification of maize serine/threonine kinase gene that is upregulated following infection by P. sorghi.

AB - Downy mildew, caused by Peronosclerospora sorghi is one of the important diseases affecting maize (Zea mays L.) production worldwide. Several downy mildew resistant maize lines have been identified. However, variability in the degree of resistance among maize genotypes to P. sorghi has been reported. In the present study the molecular basis of resistance of maize to P. sorghi was studied by using differential-display reverse transcription PCR (DDRT-PCR) technique. Maize seedlings of downy mildew resistant (MAI 756) and susceptible (CM 500) cultivars at two-leaf stage were inoculated with P. sorghi and leaf samples were collected at 0, 3 and 5 days after inoculation and analyzed for differentially expressed cDNAs using cDNA-RAPD approach. A total of 17 cDNA fragments corresponding to transcripts that showed alterations during the defence response of maize to P. sorghi were identified. Genes involved in signal transduction and several genes with unknown functions were found to be upregulated in maize after infection by P. sorghi. Among 35 random primers tested, OPD-05 has identified a differentially expressed cDNA coding for serine/threonine kinase protein in resistant maize genotype. Constitutive and high level expression of serine/threonine kinase gene was observed in the uninoculated plants of resistant genotype, whereas no expression of this gene was observed in uninoculated plants of susceptible genotype. However, the transcript level was induced 3 days after inoculation in the susceptible genotype and slightly reduced 5 days after inoculation. This study represents the first identification of maize serine/threonine kinase gene that is upregulated following infection by P. sorghi.

KW - Differential display RT-PCR

KW - Downy mildew

KW - Peronosclerospora sorghi

KW - Transcriptomics

KW - Zea mays

UR - http://www.scopus.com/inward/record.url?scp=85020391271&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85020391271&partnerID=8YFLogxK

U2 - 10.1556/0806.45.2017.010

DO - 10.1556/0806.45.2017.010

M3 - Article

AN - SCOPUS:85020391271

VL - 45

SP - 272

EP - 283

JO - Cereal Research Communications

JF - Cereal Research Communications

SN - 0133-3720

IS - 2

ER -