The Anatomic responses of Lycopersicon esculentum Mill. due to the Tomato Leaf Curl Virus (TLCV)

• Published in: Environment conservation journal Vol. 9; no. 1&2
• Main Authors: Sarika Srivastava, G. P. Srivastava, J. P. Tewari
• Format: Journal Article
• Language: English
• Published: Action for Sustainable Efficacious Development and Awareness 16-06-2008
• Subjects: Anatomical changes; Stomatal index; TLCV; Tomato
• ISSN: 0972-3099; 2278-5124
• DOI: 10.36953/ECJ.2008.091203

An  anatomical  study   of  tomato  plants infected by  tomato leaf curl  virus was  conducted   to  elucidate   the mode of infection of  the  causal  virus.  One  to  two  months  after whitefly  transmission,  the  severe   symptoms appear with  thickening of the  veins,  curling  of  leaf  and  stunting of  plant.  Typically   reorganization  of  leaf tissue  consisted   in  replacement of the  spongy  parenchyma   by  a palisade  parenchyma. Palisade   parenchyma tissues   were  compact   in  comparison  to  healthy. Abnormal  cambial  activity  was  observed   in  conducting tissue.  Weaker  selerenchyma  rings   were   narrow  and   these   were   fewer   narrow  xylem  vessels.  Phloem necrosis   was  observed  frequently  in  virus   infected  stem.  Bronzing  &  discoloration  sieve  elements  in phloem  were  also  found  in  infected stem.  The  cortical  parenchyma   was  wider  and  formation of  mechanical and  conducting tissues   was  reduced. In  root   of  infected   plant  secondary   thickening  was  less  in  comparison to  healthy.  Xylem  vessels  were  narrow and  with  scanty  phloem  in diseased  root. The  no. of  stomata was  also reduced   in  infected leaves.