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Effects of DCPA on Tomato Hypocotyl Tissue

Published online by Cambridge University Press:  12 June 2017

J. LaMar Anderson  and
Bijan Shaybany
J. LaMar Anderson
Affiliation:
Dep. of Plant Sci., Utah State Univ., Logan, Utah 84321
Bijan Shaybany
Affiliation:
Dep. of Plant Sci., Utah State Univ., Logan, Utah 84321
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Abstract

Dimethyl tetrachloroterephthalate (DCPA) caused localized swelling of the hypocotyl of tomato (Lycopersicon esculentum Mill. ‘VF-99′). DCPA caused phloem and xylem parenchyma cells to become multinucleate and to develop into masses undifferentiated tissue within the stele of the tomato hypocotyl. Xylem procambium differentiated earlier than that of controls and matured into shortened and often disconnected elements. Xylem formed prior to treatment was often disrupted due to pressure from the dividing xylem parenchyma. Xylem parenchyma tended to break down resulting in the formation of air cavities within the stele. Cells in the stele of treated hypocotyls tended to stain more intensely with safranin than did the cells in the steles of untreated tomato hypocotyls indicating a difference in cell wall composition. Treated tissue had a higher concentration of total oxalates than did untreated tissue.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 5 , September 1972 , pp. 434 - 439
Copyright
Copyright © Weed Science Society of America 

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