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The effect of polyamines on leaf senescence in two diverse rose speciesN

IR@CSIR-IHBT

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Title The effect of polyamines on leaf senescence in two diverse rose speciesN
 
Creator Sood, Shweta
Nagar , P K
 
Subject Plant Biotechnology
 
Description Polyamines (PAs) retarded the senescence of leaf discs of two diverse species of rose viz., Rosa bourboniana
and Rosa damascena, while polyamine biosynthetic inhibitors difluoromethylornithine (DFMO), difluoromethylarginine
(DFMA), methylglyoxal-bis (guanylhydrazone) (MGBG) and abscisic acid (ABA) promoted senescence.
Spermine was significantly the most effective polyamine in retarding senescence in R. bourboniana while
MGBG and DFMA were more prominent in accelerating senescence in R. damascena and R. bourboniana respectively.
Protein and RNA content were significantly higher in polyamine treated leaf discs compared to those
treated with polyamine biosynthetic inhibitors and ABA. Total and reducing sugars decreased under all treatments
while the starch content increased significantly only in polyamine treated leaf discs. Peroxidase and cellulase
activities were retarded by polyamine treatments and accelerated by polyamine biosynthetic inhibitors and
ABA. The role of PAs is discussed in relation to senescence.
 
Date 2003
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://ihbt.csircentral.net/377/1/108_2003_The_Effect.pdf
Sood, Shweta and Nagar , P K (2003) The effect of polyamines on leaf senescence in two diverse rose speciesN. Plant Growth Regulation, 39. pp. 155-160.
 
Relation http://ihbt.csircentral.net/377/